[PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Ulf Hansson]

Changes in v2:
	- Well, quite a lot as I discovered various problems when doing
	additional testing of corner-case. I suggest re-review from scratch,
	even if I decided to keep some reviewed-by tags.
	- Added patches to allow some drivers that needs to align or opt-out
	from the new common behaviour in genpd.

If a PM domain (genpd) is powered-on during boot, there is probably a good
reason for it. Therefore it's known to be a bad idea to allow such genpd to be
powered-off before all of its consumer devices have been probed. This series
intends to fix this problem.

We have been discussing these issues at LKML and at various Linux-conferences
in the past. I have therefore tried to include the people I can recall being
involved, but I may have forgotten some (my apologies), feel free to loop them
in.

I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
Let me know if you want me to share this code too.

Please help review and test!
Finally, a big thanks to Saravana for all the support!

Kind regards
Ulf Hansson


Saravana Kannan (1):
  driver core: Add dev_set_drv_sync_state()

Ulf Hansson (20):
  pmdomain: core: Use of_fwnode_handle()
  pmdomain: core: Add a bus and a driver for genpd providers
  pmdomain: core: Add the genpd->dev to the genpd provider bus
  pmdomain: core: Export a common ->sync_state() helper for genpd
    providers
  pmdomain: core: Prepare to add the common ->sync_state() support
  soc/tegra: pmc: Opt-out from genpd's common ->sync_state() support
  cpuidle: psci: Opt-out from genpd's common ->sync_state() support
  cpuidle: riscv-sbi: Opt-out from genpd's common ->sync_state() support
  pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()
  pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()
  firmware/pmdomain: xilinx: Move ->sync_state() support to firmware
    driver
  firmware: xilinx: Don't share zynqmp_pm_init_finalize()
  firmware: xilinx: Use of_genpd_sync_state()
  driver core: Export get_dev_from_fwnode()
  pmdomain: core: Add common ->sync_state() support for genpd providers
  pmdomain: core: Default to use of_genpd_sync_state() for genpd
    providers
  pmdomain: core: Leave powered-on genpds on until late_initcall_sync
  pmdomain: core: Leave powered-on genpds on until sync_state
  cpuidle: psci: Drop redundant sync_state support
  cpuidle: riscv-sbi: Drop redundant sync_state support

 drivers/base/core.c                         |   8 +-
 drivers/cpuidle/cpuidle-psci-domain.c       |  14 --
 drivers/cpuidle/cpuidle-riscv-sbi.c         |  14 --
 drivers/firmware/xilinx/zynqmp.c            |  18 +-
 drivers/pmdomain/core.c                     | 239 ++++++++++++++++++--
 drivers/pmdomain/qcom/rpmhpd.c              |   2 +
 drivers/pmdomain/qcom/rpmpd.c               |   2 +
 drivers/pmdomain/xilinx/zynqmp-pm-domains.c |  16 --
 drivers/soc/tegra/pmc.c                     |  26 ++-
 include/linux/device.h                      |  13 ++
 include/linux/firmware/xlnx-zynqmp.h        |   6 -
 include/linux/pm_domain.h                   |  17 ++
 12 files changed, 294 insertions(+), 81 deletions(-)

-- 
2.43.0

[PATCH v2 01/21] pmdomain: core: Use of_fwnode_handle()

[Ulf Hansson]

Let's avoid accessing the np->fwnode directly and use the common helper
of_fwnode_handle() instead.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index ff5c7f2b69ce..9a66b728fbbf 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -2557,7 +2557,7 @@ static int genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
 	cp->node = of_node_get(np);
 	cp->data = data;
 	cp->xlate = xlate;
-	fwnode_dev_initialized(&np->fwnode, true);
+	fwnode_dev_initialized(of_fwnode_handle(np), true);
 
 	mutex_lock(&of_genpd_mutex);
 	list_add(&cp->link, &of_genpd_providers);
@@ -2727,7 +2727,7 @@ void of_genpd_del_provider(struct device_node *np)
 			 * so that the PM domain can be safely removed.
 			 */
 			list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
-				if (gpd->provider == &np->fwnode) {
+				if (gpd->provider == of_fwnode_handle(np)) {
 					gpd->has_provider = false;
 
 					if (gpd->opp_table) {
@@ -2737,7 +2737,7 @@ void of_genpd_del_provider(struct device_node *np)
 				}
 			}
 
-			fwnode_dev_initialized(&cp->node->fwnode, false);
+			fwnode_dev_initialized(of_fwnode_handle(cp->node), false);
 			list_del(&cp->link);
 			of_node_put(cp->node);
 			kfree(cp);
@@ -2916,7 +2916,7 @@ struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
 
 	mutex_lock(&gpd_list_lock);
 	list_for_each_entry_safe(gpd, tmp, &gpd_list, gpd_list_node) {
-		if (gpd->provider == &np->fwnode) {
+		if (gpd->provider == of_fwnode_handle(np)) {
 			ret = genpd_remove(gpd);
 			genpd = ret ? ERR_PTR(ret) : gpd;
 			break;
@@ -3269,7 +3269,7 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state,
 
 	genpd_state->power_on_latency_ns = 1000LL * exit_latency;
 	genpd_state->power_off_latency_ns = 1000LL * entry_latency;
-	genpd_state->fwnode = &state_node->fwnode;
+	genpd_state->fwnode = of_fwnode_handle(state_node);
 
 	return 0;
 }
-- 
2.43.0

[PATCH v2 02/21] pmdomain: core: Add a bus and a driver for genpd providers

[Ulf Hansson]

When we create a genpd via pm_genpd_init() we are initializing a
corresponding struct device for it, but we don't add the device to any
bus_type. It has not really been needed as the device is used as cookie to
help us manage OPP tables.

However, to prepare to make better use of the device let's add a new genpd
provider bus_type and a corresponding genpd provider driver. Subsequent
changes will make use of this.

Suggested-by: Saravana Kannan <saravanak@google.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c | 89 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 88 insertions(+), 1 deletion(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 9a66b728fbbf..da515350c65b 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -27,6 +27,11 @@
 /* Provides a unique ID for each genpd device */
 static DEFINE_IDA(genpd_ida);
 
+/* The parent for genpd_provider devices. */
+static struct device genpd_provider_bus = {
+	.init_name = "genpd_provider",
+};
+
 #define GENPD_RETRY_MAX_MS	250		/* Approximate */
 
 #define GENPD_DEV_CALLBACK(genpd, type, callback, dev)		\
@@ -44,6 +49,14 @@ static DEFINE_IDA(genpd_ida);
 static LIST_HEAD(gpd_list);
 static DEFINE_MUTEX(gpd_list_lock);
 
+#define to_genpd_provider_drv(d) container_of(d, struct genpd_provider_drv, drv)
+
+struct genpd_provider_drv {
+	struct device_driver drv;
+	int (*probe)(struct device *dev);
+	void (*remove)(struct device *dev);
+};
+
 struct genpd_lock_ops {
 	void (*lock)(struct generic_pm_domain *genpd);
 	void (*lock_nested)(struct generic_pm_domain *genpd, int depth);
@@ -2225,6 +2238,26 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
 	return 0;
 }
 
+static int genpd_provider_bus_probe(struct device *dev)
+{
+	struct genpd_provider_drv *drv = to_genpd_provider_drv(dev->driver);
+
+	return drv->probe(dev);
+}
+
+static void genpd_provider_bus_remove(struct device *dev)
+{
+	struct genpd_provider_drv *drv = to_genpd_provider_drv(dev->driver);
+
+	drv->remove(dev);
+}
+
+static const struct bus_type genpd_provider_bus_type = {
+	.name		= "genpd_provider",
+	.probe		= genpd_provider_bus_probe,
+	.remove		= genpd_provider_bus_remove,
+};
+
 static void genpd_provider_release(struct device *dev)
 {
 	/* nothing to be done here */
@@ -2262,6 +2295,8 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd)
 	genpd->gd = gd;
 	device_initialize(&genpd->dev);
 	genpd->dev.release = genpd_provider_release;
+	genpd->dev.bus = &genpd_provider_bus_type;
+	genpd->dev.parent = &genpd_provider_bus;
 
 	if (!genpd_is_dev_name_fw(genpd)) {
 		dev_set_name(&genpd->dev, "%s", genpd->name);
@@ -3355,9 +3390,61 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 }
 EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
 
+static int genpd_provider_probe(struct device *dev)
+{
+	return 0;
+}
+
+static void genpd_provider_remove(struct device *dev)
+{
+}
+
+static void genpd_provider_sync_state(struct device *dev)
+{
+}
+
+static struct genpd_provider_drv genpd_provider_drv = {
+	.drv = {
+		.name = "genpd_provider",
+		.bus = &genpd_provider_bus_type,
+		.sync_state = genpd_provider_sync_state,
+		.suppress_bind_attrs = true,
+	},
+	.probe = genpd_provider_probe,
+	.remove = genpd_provider_remove,
+};
+
 static int __init genpd_bus_init(void)
 {
-	return bus_register(&genpd_bus_type);
+	int ret;
+
+	ret = device_register(&genpd_provider_bus);
+	if (ret) {
+		put_device(&genpd_provider_bus);
+		return ret;
+	}
+
+	ret = bus_register(&genpd_provider_bus_type);
+	if (ret)
+		goto err_dev;
+
+	ret = bus_register(&genpd_bus_type);
+	if (ret)
+		goto err_prov_bus;
+
+	ret = driver_register(&genpd_provider_drv.drv);
+	if (ret)
+		goto err_bus;
+
+	return 0;
+
+err_bus:
+	bus_unregister(&genpd_bus_type);
+err_prov_bus:
+	bus_unregister(&genpd_provider_bus_type);
+err_dev:
+	device_unregister(&genpd_provider_bus);
+	return ret;
 }
 core_initcall(genpd_bus_init);
 
-- 
2.43.0

[PATCH v2 03/21] pmdomain: core: Add the genpd->dev to the genpd provider bus

[Ulf Hansson]

To take the next step for a more common handling of the genpd providers,
let's add the genpd->dev to the genpd provider bus when registering a genpd
OF provider.

Beyond this, the corresponding genpd provider driver's ->probe(),
->remove() and ->sync_state() callbacks starts to be invoked. However,
let's leave those callbacks as empty functions for now. Instead, subsequent
changes will implement them.

Suggested-by: Saravana Kannan <saravanak@google.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c | 38 ++++++++++++++++++++++++++++----------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index da515350c65b..8d5dca22e35e 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -2637,11 +2637,17 @@ int of_genpd_add_provider_simple(struct device_node *np,
 
 	genpd->dev.of_node = np;
 
+	ret = device_add(&genpd->dev);
+	if (ret)
+		return ret;
+
 	/* Parse genpd OPP table */
 	if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 		ret = dev_pm_opp_of_add_table(&genpd->dev);
-		if (ret)
-			return dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n");
+		if (ret) {
+			dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n");
+			goto err_del;
+		}
 
 		/*
 		 * Save table for faster processing while setting performance
@@ -2652,19 +2658,22 @@ int of_genpd_add_provider_simple(struct device_node *np,
 	}
 
 	ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
-	if (ret) {
-		if (genpd->opp_table) {
-			dev_pm_opp_put_opp_table(genpd->opp_table);
-			dev_pm_opp_of_remove_table(&genpd->dev);
-		}
-
-		return ret;
-	}
+	if (ret)
+		goto err_opp;
 
 	genpd->provider = &np->fwnode;
 	genpd->has_provider = true;
 
 	return 0;
+
+err_opp:
+	if (genpd->opp_table) {
+		dev_pm_opp_put_opp_table(genpd->opp_table);
+		dev_pm_opp_of_remove_table(&genpd->dev);
+	}
+err_del:
+	device_del(&genpd->dev);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(of_genpd_add_provider_simple);
 
@@ -2696,12 +2705,17 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 
 		genpd->dev.of_node = np;
 
+		ret = device_add(&genpd->dev);
+		if (ret)
+			goto error;
+
 		/* Parse genpd OPP table */
 		if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 			ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i);
 			if (ret) {
 				dev_err_probe(&genpd->dev, ret,
 					      "Failed to add OPP table for index %d\n", i);
+				device_del(&genpd->dev);
 				goto error;
 			}
 
@@ -2737,6 +2751,8 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 			dev_pm_opp_put_opp_table(genpd->opp_table);
 			dev_pm_opp_of_remove_table(&genpd->dev);
 		}
+
+		device_del(&genpd->dev);
 	}
 
 	return ret;
@@ -2769,6 +2785,8 @@ void of_genpd_del_provider(struct device_node *np)
 						dev_pm_opp_put_opp_table(gpd->opp_table);
 						dev_pm_opp_of_remove_table(&gpd->dev);
 					}
+
+					device_del(&gpd->dev);
 				}
 			}
 
-- 
2.43.0

[PATCH v2 04/21] pmdomain: core: Export a common ->sync_state() helper for genpd providers

[Ulf Hansson]

In some cases the typical platform driver that act as genpd provider, may
need its own ->sync_state() callback to manage various things. In this
regards, the provider most likely wants to allow its corresponding genpds
to be powered-off.

For this reason, let's introduce a new genpd helper function,
of_genpd_sync_state() that helps genpd provider drivers to achieve this.

Suggested-by: Saravana Kannan <saravanak@google.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

Changes in v2:
	- Changed the in-parameter from a struct device* to a stuct device_node*

---
 drivers/pmdomain/core.c   | 27 +++++++++++++++++++++++++++
 include/linux/pm_domain.h |  3 +++
 2 files changed, 30 insertions(+)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 8d5dca22e35e..4047af5a275d 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -3408,6 +3408,33 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 }
 EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
 
+/**
+ * of_genpd_sync_state() - A common sync_state function for genpd providers
+ * @np: The device node the genpd provider is associated with.
+ *
+ * The @np that corresponds to a genpd provider may provide one or multiple
+ * genpds. This function makes use @np to find the genpds that belongs to the
+ * provider. For each genpd we try a power-off.
+ */
+void of_genpd_sync_state(struct device_node *np)
+{
+	struct generic_pm_domain *genpd;
+
+	if (!np)
+		return;
+
+	mutex_lock(&gpd_list_lock);
+	list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+		if (genpd->provider == of_fwnode_handle(np)) {
+			genpd_lock(genpd);
+			genpd_power_off(genpd, false, 0);
+			genpd_unlock(genpd);
+		}
+	}
+	mutex_unlock(&gpd_list_lock);
+}
+EXPORT_SYMBOL_GPL(of_genpd_sync_state);
+
 static int genpd_provider_probe(struct device *dev)
 {
 	return 0;
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 0b18160901a2..3578196e6626 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -431,6 +431,7 @@ int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec,
 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
 int of_genpd_parse_idle_states(struct device_node *dn,
 			       struct genpd_power_state **states, int *n);
+void of_genpd_sync_state(struct device_node *np);
 
 int genpd_dev_pm_attach(struct device *dev);
 struct device *genpd_dev_pm_attach_by_id(struct device *dev,
@@ -476,6 +477,8 @@ static inline int of_genpd_parse_idle_states(struct device_node *dn,
 	return -ENODEV;
 }
 
+static inline void of_genpd_sync_state(struct device_node *np) {}
+
 static inline int genpd_dev_pm_attach(struct device *dev)
 {
 	return 0;
-- 
2.43.0

[PATCH v2 05/21] pmdomain: core: Prepare to add the common ->sync_state() support

[Ulf Hansson]

Before we can implement the common ->sync_state() support in genpd, we need
to allow a few specific genpd providers to opt out from the new behaviour.

Let's introduce GENPD_FLAG_NO_SYNC_STATE as a new genpd config option, to
allow providers to opt out.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 include/linux/pm_domain.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 3578196e6626..9329554b9c4a 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -104,6 +104,11 @@ struct dev_pm_domain_list {
  * GENPD_FLAG_DEV_NAME_FW:	Instructs genpd to generate an unique device name
  *				using ida. It is used by genpd providers which
  *				get their genpd-names directly from FW.
+ *
+ * GENPD_FLAG_NO_SYNC_STATE:	The ->sync_state() support is implemented in a
+ *				genpd provider specific way, likely through a
+ *				parent device node. This flag makes genpd to
+ *				skip its internal support for this.
  */
 #define GENPD_FLAG_PM_CLK	 (1U << 0)
 #define GENPD_FLAG_IRQ_SAFE	 (1U << 1)
@@ -114,6 +119,7 @@ struct dev_pm_domain_list {
 #define GENPD_FLAG_MIN_RESIDENCY (1U << 6)
 #define GENPD_FLAG_OPP_TABLE_FW	 (1U << 7)
 #define GENPD_FLAG_DEV_NAME_FW	 (1U << 8)
+#define GENPD_FLAG_NO_SYNC_STATE (1U << 9)
 
 enum gpd_status {
 	GENPD_STATE_ON = 0,	/* PM domain is on */
-- 
2.43.0

[PATCH v2 06/21] soc/tegra: pmc: Opt-out from genpd's common ->sync_state() support

[Ulf Hansson]

Tegra implements its own specific ->sync_state() callback for the genpd
providers. Let's set the GENPD_FLAG_NO_SYNC_STATE to inform genpd about it.

Moreover, let's call of_genpd_sync_state() to make sure genpd tries to
power off unused PM domains.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/soc/tegra/pmc.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 51b9d852bb6a..ef486387ccd9 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -418,7 +418,6 @@ struct tegra_pmc_soc {
  * @irq: chip implementation for the IRQ domain
  * @clk_nb: pclk clock changes handler
  * @core_domain_state_synced: flag marking the core domain's state as synced
- * @core_domain_registered: flag marking the core domain as registered
  * @wake_type_level_map: Bitmap indicating level type for non-dual edge wakes
  * @wake_type_dual_edge_map: Bitmap indicating if a wake is dual-edge or not
  * @wake_sw_status_map: Bitmap to hold raw status of wakes without mask
@@ -462,7 +461,6 @@ struct tegra_pmc {
 	struct notifier_block clk_nb;
 
 	bool core_domain_state_synced;
-	bool core_domain_registered;
 
 	unsigned long *wake_type_level_map;
 	unsigned long *wake_type_dual_edge_map;
@@ -1297,6 +1295,7 @@ static int tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np)
 
 	pg->id = id;
 	pg->genpd.name = np->name;
+	pg->genpd.flags = GENPD_FLAG_NO_SYNC_STATE;
 	pg->genpd.power_off = tegra_genpd_power_off;
 	pg->genpd.power_on = tegra_genpd_power_on;
 	pg->pmc = pmc;
@@ -1406,6 +1405,7 @@ static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
 		return -ENOMEM;
 
 	genpd->name = "core";
+	genpd->flags = GENPD_FLAG_NO_SYNC_STATE;
 	genpd->set_performance_state = tegra_pmc_core_pd_set_performance_state;
 
 	err = devm_pm_opp_set_regulators(pmc->dev, rname);
@@ -1425,8 +1425,6 @@ static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
 		goto remove_genpd;
 	}
 
-	pmc->core_domain_registered = true;
-
 	return 0;
 
 remove_genpd:
@@ -4262,8 +4260,25 @@ static const struct of_device_id tegra_pmc_match[] = {
 
 static void tegra_pmc_sync_state(struct device *dev)
 {
+	struct device_node *np, *child;
 	int err;
 
+	np = of_get_child_by_name(dev->of_node, "powergates");
+	if (!np)
+		return;
+
+	for_each_child_of_node(np, child)
+		of_genpd_sync_state(child);
+
+	of_node_put(np);
+
+	np = of_get_child_by_name(dev->of_node, "core-domain");
+	if (!np)
+		return;
+
+	of_genpd_sync_state(np);
+	of_node_put(np);
+
 	/*
 	 * Newer device-trees have power domains, but we need to prepare all
 	 * device drivers with runtime PM and OPP support first, otherwise
@@ -4277,9 +4292,6 @@ static void tegra_pmc_sync_state(struct device *dev)
 	 * no dependencies that will block the state syncing. We shouldn't
 	 * mark the domain as synced in this case.
 	 */
-	if (!pmc->core_domain_registered)
-		return;
-
 	pmc->core_domain_state_synced = true;
 
 	/* this is a no-op if core regulator isn't used */
-- 
2.43.0

[PATCH v2 07/21] cpuidle: psci: Opt-out from genpd's common ->sync_state() support

[Ulf Hansson]

The cpuidle-psci-domain implements its own specific ->sync_state()
callback. Let's set the GENPD_FLAG_NO_SYNC_STATE to inform genpd about it.

Moreover, let's call of_genpd_sync_state() to make sure genpd tries to
power off unused PM domains.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/cpuidle/cpuidle-psci-domain.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index 2041f59116ce..b880ce2df8b5 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -63,7 +63,8 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
 	if (!pd_provider)
 		goto free_pd;
 
-	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;
+	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN |
+		     GENPD_FLAG_NO_SYNC_STATE;
 
 	/*
 	 * Allow power off when OSI has been successfully enabled.
@@ -128,11 +129,16 @@ static void psci_pd_remove(void)
 
 static void psci_cpuidle_domain_sync_state(struct device *dev)
 {
+	struct psci_pd_provider *pd_provider;
+
 	/*
 	 * All devices have now been attached/probed to the PM domain topology,
 	 * hence it's fine to allow domain states to be picked.
 	 */
 	psci_pd_allow_domain_state = true;
+
+	list_for_each_entry(pd_provider, &psci_pd_providers, link)
+		of_genpd_sync_state(pd_provider->node);
 }
 
 static const struct of_device_id psci_of_match[] = {
-- 
2.43.0

[PATCH v2 08/21] cpuidle: riscv-sbi: Opt-out from genpd's common ->sync_state() support

[Ulf Hansson]

The riscv-sbi-domain implements its own specific ->sync_state() callback.
Let's set the GENPD_FLAG_NO_SYNC_STATE to inform genpd about it.

Moreover, let's call of_genpd_sync_state() to make sure genpd tries to
power off unused PM domains.

Cc: Anup Patel <anup@brainfault.org>
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/cpuidle/cpuidle-riscv-sbi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c
index 0fe1ece9fbdc..83d58d00872f 100644
--- a/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ b/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -347,11 +347,16 @@ static int sbi_cpuidle_init_cpu(struct device *dev, int cpu)
 
 static void sbi_cpuidle_domain_sync_state(struct device *dev)
 {
+	struct sbi_pd_provider *pd_provider;
+
 	/*
 	 * All devices have now been attached/probed to the PM domain
 	 * topology, hence it's fine to allow domain states to be picked.
 	 */
 	sbi_cpuidle_pd_allow_domain_state = true;
+
+	list_for_each_entry(pd_provider, &sbi_pd_providers, link)
+		of_genpd_sync_state(pd_provider->node);
 }
 
 #ifdef CONFIG_DT_IDLE_GENPD
@@ -396,7 +401,8 @@ static int sbi_pd_init(struct device_node *np)
 	if (!pd_provider)
 		goto free_pd;
 
-	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;
+	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN |
+		     GENPD_FLAG_NO_SYNC_STATE;
 
 	/* Allow power off when OSI is available. */
 	if (sbi_cpuidle_use_osi)
-- 
2.43.0

[PATCH v2 09/21] pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()

[Ulf Hansson]

To make sure genpd tries to power off unused PM domains, let's call
of_genpd_sync_state() from our own ->sync_state() callback.

Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konradybcio@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/qcom/rpmpd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pmdomain/qcom/rpmpd.c b/drivers/pmdomain/qcom/rpmpd.c
index 0be6b3026e3a..833c46944600 100644
--- a/drivers/pmdomain/qcom/rpmpd.c
+++ b/drivers/pmdomain/qcom/rpmpd.c
@@ -1144,6 +1144,8 @@ static void rpmpd_sync_state(struct device *dev)
 	unsigned int i;
 	int ret;
 
+	of_genpd_sync_state(dev->of_node);
+
 	mutex_lock(&rpmpd_lock);
 	for (i = 0; i < desc->num_pds; i++) {
 		pd = rpmpds[i];
-- 
2.43.0

[PATCH v2 10/21] pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()

[Ulf Hansson]

To make sure genpd tries to power off unused PM domains, let's call
of_genpd_sync_state() from our own ->sync_state() callback.

Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konradybcio@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/qcom/rpmhpd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pmdomain/qcom/rpmhpd.c b/drivers/pmdomain/qcom/rpmhpd.c
index 078323b85b56..d9ad6a94b3ab 100644
--- a/drivers/pmdomain/qcom/rpmhpd.c
+++ b/drivers/pmdomain/qcom/rpmhpd.c
@@ -1027,6 +1027,8 @@ static void rpmhpd_sync_state(struct device *dev)
 	unsigned int i;
 	int ret;
 
+	of_genpd_sync_state(dev->of_node);
+
 	mutex_lock(&rpmhpd_lock);
 	for (i = 0; i < desc->num_pds; i++) {
 		pd = rpmhpds[i];
-- 
2.43.0

[PATCH v2 11/21] firmware/pmdomain: xilinx: Move ->sync_state() support to firmware driver

[Ulf Hansson]

Rather than having the genpd provider to add device_links for each device
that gets attached, to implement the ->sync_state() support, let's rely on
fw_devlink to do this for us.

In this way, we can simplify the code by moving the ->sync_state() callback
into the firmware driver, so let's do that.

Cc: Michael Tretter <m.tretter@pengutronix.de>
Cc: Michal Simek <michal.simek@amd.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/firmware/xilinx/zynqmp.c            | 10 ++++++++++
 drivers/pmdomain/xilinx/zynqmp-pm-domains.c | 16 ----------------
 2 files changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 7356e860e65c..a91a0191c689 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -2100,6 +2100,15 @@ static void zynqmp_firmware_remove(struct platform_device *pdev)
 	platform_device_unregister(em_dev);
 }
 
+static void zynqmp_firmware_sync_state(struct device *dev)
+{
+	if (!of_device_is_compatible(dev->of_node, "xlnx,zynqmp-firmware"))
+		return;
+
+	if (zynqmp_pm_init_finalize())
+		dev_warn(dev, "failed to release power management to firmware\n");
+}
+
 static const struct of_device_id zynqmp_firmware_of_match[] = {
 	{.compatible = "xlnx,zynqmp-firmware"},
 	{.compatible = "xlnx,versal-firmware"},
@@ -2112,6 +2121,7 @@ static struct platform_driver zynqmp_firmware_driver = {
 		.name = "zynqmp_firmware",
 		.of_match_table = zynqmp_firmware_of_match,
 		.dev_groups = zynqmp_firmware_groups,
+		.sync_state = zynqmp_firmware_sync_state,
 	},
 	.probe = zynqmp_firmware_probe,
 	.remove = zynqmp_firmware_remove,
diff --git a/drivers/pmdomain/xilinx/zynqmp-pm-domains.c b/drivers/pmdomain/xilinx/zynqmp-pm-domains.c
index d579220a4500..b5aedd6e33ad 100644
--- a/drivers/pmdomain/xilinx/zynqmp-pm-domains.c
+++ b/drivers/pmdomain/xilinx/zynqmp-pm-domains.c
@@ -153,14 +153,8 @@ static int zynqmp_gpd_attach_dev(struct generic_pm_domain *domain,
 				 struct device *dev)
 {
 	struct zynqmp_pm_domain *pd = to_zynqmp_pm_domain(domain);
-	struct device_link *link;
 	int ret;
 
-	link = device_link_add(dev, &domain->dev, DL_FLAG_SYNC_STATE_ONLY);
-	if (!link)
-		dev_dbg(&domain->dev, "failed to create device link for %s\n",
-			dev_name(dev));
-
 	/* If this is not the first device to attach there is nothing to do */
 	if (domain->device_count)
 		return 0;
@@ -298,19 +292,9 @@ static void zynqmp_gpd_remove(struct platform_device *pdev)
 	of_genpd_del_provider(pdev->dev.parent->of_node);
 }
 
-static void zynqmp_gpd_sync_state(struct device *dev)
-{
-	int ret;
-
-	ret = zynqmp_pm_init_finalize();
-	if (ret)
-		dev_warn(dev, "failed to release power management to firmware\n");
-}
-
 static struct platform_driver zynqmp_power_domain_driver = {
 	.driver	= {
 		.name = "zynqmp_power_controller",
-		.sync_state = zynqmp_gpd_sync_state,
 	},
 	.probe = zynqmp_gpd_probe,
 	.remove = zynqmp_gpd_remove,
-- 
2.43.0

[PATCH v2 12/21] firmware: xilinx: Don't share zynqmp_pm_init_finalize()

[Ulf Hansson]

As there no longer any users outside the zynqmp firmware driver of
zynqmp_pm_init_finalize(), let's turn into a local static function.

Cc: Michal Simek <michal.simek@amd.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/firmware/xilinx/zynqmp.c     | 3 +--
 include/linux/firmware/xlnx-zynqmp.h | 6 ------
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index a91a0191c689..87ddbb7d11c2 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -1299,11 +1299,10 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_bootmode_write);
  * This API function is to be used for notify the power management controller
  * about the completed power management initialization.
  */
-int zynqmp_pm_init_finalize(void)
+static int zynqmp_pm_init_finalize(void)
 {
 	return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, NULL, 0);
 }
-EXPORT_SYMBOL_GPL(zynqmp_pm_init_finalize);
 
 /**
  * zynqmp_pm_set_suspend_mode()	- Set system suspend mode
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 6d4dbc196b93..ae48d619c4e0 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -585,7 +585,6 @@ int zynqmp_pm_reset_assert(const u32 reset,
 int zynqmp_pm_reset_get_status(const u32 reset, u32 *status);
 unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode);
 int zynqmp_pm_bootmode_write(u32 ps_mode);
-int zynqmp_pm_init_finalize(void);
 int zynqmp_pm_set_suspend_mode(u32 mode);
 int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
 			   const u32 qos, const enum zynqmp_pm_request_ack ack);
@@ -746,11 +745,6 @@ static inline int zynqmp_pm_bootmode_write(u32 ps_mode)
 	return -ENODEV;
 }
 
-static inline int zynqmp_pm_init_finalize(void)
-{
-	return -ENODEV;
-}
-
 static inline int zynqmp_pm_set_suspend_mode(u32 mode)
 {
 	return -ENODEV;
-- 
2.43.0

[PATCH v2 13/21] firmware: xilinx: Use of_genpd_sync_state()

[Ulf Hansson]

To make sure genpd tries to power off unused PM domains, let's call
of_genpd_sync_state() from our own ->sync_state() callback.

Cc: Michal Simek <michal.simek@amd.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/firmware/xilinx/zynqmp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 87ddbb7d11c2..02da3e48bc8f 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/pm_domain.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 #include <linux/hashtable.h>
@@ -2101,9 +2102,13 @@ static void zynqmp_firmware_remove(struct platform_device *pdev)
 
 static void zynqmp_firmware_sync_state(struct device *dev)
 {
-	if (!of_device_is_compatible(dev->of_node, "xlnx,zynqmp-firmware"))
+	struct device_node *np = dev->of_node;
+
+	if (!of_device_is_compatible(np, "xlnx,zynqmp-firmware"))
 		return;
 
+	of_genpd_sync_state(np);
+
 	if (zynqmp_pm_init_finalize())
 		dev_warn(dev, "failed to release power management to firmware\n");
 }
-- 
2.43.0

[PATCH v2 14/21] driver core: Export get_dev_from_fwnode()

[Ulf Hansson]

It has turned out get_dev_from_fwnode() is useful at a few other places
outside of the driver core, as in gpiolib.c for example. Therefore let's
make it available as a common helper function.

Suggested-by: Saravana Kannan <saravanak@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/base/core.c    | 8 ++++++--
 include/linux/device.h | 1 +
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index d2f9d3a59d6b..51512ab8a6e9 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1881,8 +1881,6 @@ static void fw_devlink_unblock_consumers(struct device *dev)
 	device_links_write_unlock();
 }
 
-#define get_dev_from_fwnode(fwnode)	get_device((fwnode)->dev)
-
 static bool fwnode_init_without_drv(struct fwnode_handle *fwnode)
 {
 	struct device *dev;
@@ -5255,6 +5253,12 @@ void device_set_node(struct device *dev, struct fwnode_handle *fwnode)
 }
 EXPORT_SYMBOL_GPL(device_set_node);
 
+struct device *get_dev_from_fwnode(struct fwnode_handle *fwnode)
+{
+	return get_device((fwnode)->dev);
+}
+EXPORT_SYMBOL_GPL(get_dev_from_fwnode);
+
 int device_match_name(struct device *dev, const void *name)
 {
 	return sysfs_streq(dev_name(dev), name);
diff --git a/include/linux/device.h b/include/linux/device.h
index 79e49fe494b7..f6ca813eebbe 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1086,6 +1086,7 @@ void device_set_node(struct device *dev, struct fwnode_handle *fwnode);
 int device_add_of_node(struct device *dev, struct device_node *of_node);
 void device_remove_of_node(struct device *dev);
 void device_set_of_node_from_dev(struct device *dev, const struct device *dev2);
+struct device *get_dev_from_fwnode(struct fwnode_handle *fwnode);
 
 static inline struct device_node *dev_of_node(struct device *dev)
 {
-- 
2.43.0

[PATCH v2 15/21] pmdomain: core: Add common ->sync_state() support for genpd providers

[Ulf Hansson]

If the genpd provider's fwnode doesn't have an associated struct device
with it, we can make use of the generic genpd->dev and it corresponding
driver internally in genpd to manage ->sync_state().

More precisely, while adding a genpd OF provider let's check if the fwnode
has a device and if not, make the preparation to handle ->sync_state()
internally through the genpd_provider_driver and the genpd_provider_bus.

Note that, genpd providers may opt out from this behaviour by setting the
GENPD_FLAG_NO_SYNC_STATE config options for the genpds in question.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c   | 52 +++++++++++++++++++++++++++++++++++++--
 include/linux/pm_domain.h |  7 ++++++
 2 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 4047af5a275d..c094ccbba151 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -189,6 +189,7 @@ static const struct genpd_lock_ops genpd_raw_spin_ops = {
 #define genpd_is_rpm_always_on(genpd)	(genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)
 #define genpd_is_opp_table_fw(genpd)	(genpd->flags & GENPD_FLAG_OPP_TABLE_FW)
 #define genpd_is_dev_name_fw(genpd)	(genpd->flags & GENPD_FLAG_DEV_NAME_FW)
+#define genpd_is_no_sync_state(genpd)	(genpd->flags & GENPD_FLAG_NO_SYNC_STATE)
 
 static inline bool irq_safe_dev_in_sleep_domain(struct device *dev,
 		const struct generic_pm_domain *genpd)
@@ -2374,6 +2375,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 	INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn);
 	atomic_set(&genpd->sd_count, 0);
 	genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON;
+	genpd->sync_state = GENPD_SYNC_STATE_OFF;
 	genpd->device_count = 0;
 	genpd->provider = NULL;
 	genpd->device_id = -ENXIO;
@@ -2627,6 +2629,8 @@ static bool genpd_present(const struct generic_pm_domain *genpd)
 int of_genpd_add_provider_simple(struct device_node *np,
 				 struct generic_pm_domain *genpd)
 {
+	struct fwnode_handle *fwnode;
+	struct device *dev;
 	int ret;
 
 	if (!np || !genpd)
@@ -2637,6 +2641,15 @@ int of_genpd_add_provider_simple(struct device_node *np,
 
 	genpd->dev.of_node = np;
 
+	fwnode = of_fwnode_handle(np);
+	dev = get_dev_from_fwnode(fwnode);
+	if (!dev && !genpd_is_no_sync_state(genpd)) {
+		genpd->sync_state = GENPD_SYNC_STATE_SIMPLE;
+		device_set_node(&genpd->dev, fwnode);
+	}
+
+	put_device(dev);
+
 	ret = device_add(&genpd->dev);
 	if (ret)
 		return ret;
@@ -2661,7 +2674,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
 	if (ret)
 		goto err_opp;
 
-	genpd->provider = &np->fwnode;
+	genpd->provider = fwnode;
 	genpd->has_provider = true;
 
 	return 0;
@@ -2686,8 +2699,11 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 				  struct genpd_onecell_data *data)
 {
 	struct generic_pm_domain *genpd;
+	struct fwnode_handle *fwnode;
+	struct device *dev;
 	unsigned int i;
 	int ret = -EINVAL;
+	bool sync_state = false;
 
 	if (!np || !data)
 		return -EINVAL;
@@ -2695,6 +2711,13 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 	if (!data->xlate)
 		data->xlate = genpd_xlate_onecell;
 
+	fwnode = of_fwnode_handle(np);
+	dev = get_dev_from_fwnode(fwnode);
+	if (!dev)
+		sync_state = true;
+
+	put_device(dev);
+
 	for (i = 0; i < data->num_domains; i++) {
 		genpd = data->domains[i];
 
@@ -2705,6 +2728,12 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 
 		genpd->dev.of_node = np;
 
+		if (sync_state && !genpd_is_no_sync_state(genpd)) {
+			genpd->sync_state = GENPD_SYNC_STATE_ONECELL;
+			device_set_node(&genpd->dev, fwnode);
+			sync_state = false;
+		}
+
 		ret = device_add(&genpd->dev);
 		if (ret)
 			goto error;
@@ -2727,7 +2756,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 			WARN_ON(IS_ERR(genpd->opp_table));
 		}
 
-		genpd->provider = &np->fwnode;
+		genpd->provider = fwnode;
 		genpd->has_provider = true;
 	}
 
@@ -3446,6 +3475,25 @@ static void genpd_provider_remove(struct device *dev)
 
 static void genpd_provider_sync_state(struct device *dev)
 {
+	struct generic_pm_domain *genpd = container_of(dev, struct generic_pm_domain, dev);
+
+	switch (genpd->sync_state) {
+	case GENPD_SYNC_STATE_OFF:
+		break;
+
+	case GENPD_SYNC_STATE_ONECELL:
+		of_genpd_sync_state(dev->of_node);
+		break;
+
+	case GENPD_SYNC_STATE_SIMPLE:
+		genpd_lock(genpd);
+		genpd_power_off(genpd, false, 0);
+		genpd_unlock(genpd);
+		break;
+
+	default:
+		break;
+	}
 }
 
 static struct genpd_provider_drv genpd_provider_drv = {
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 9329554b9c4a..d68e07dadc99 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -133,6 +133,12 @@ enum genpd_notication {
 	GENPD_NOTIFY_ON,
 };
 
+enum genpd_sync_state {
+	GENPD_SYNC_STATE_OFF = 0,
+	GENPD_SYNC_STATE_SIMPLE,
+	GENPD_SYNC_STATE_ONECELL,
+};
+
 struct dev_power_governor {
 	bool (*power_down_ok)(struct dev_pm_domain *domain);
 	bool (*suspend_ok)(struct device *dev);
@@ -193,6 +199,7 @@ struct generic_pm_domain {
 	unsigned int performance_state;	/* Aggregated max performance state */
 	cpumask_var_t cpus;		/* A cpumask of the attached CPUs */
 	bool synced_poweroff;		/* A consumer needs a synced poweroff */
+	enum genpd_sync_state sync_state; /* How sync_state is managed. */
 	int (*power_off)(struct generic_pm_domain *domain);
 	int (*power_on)(struct generic_pm_domain *domain);
 	struct raw_notifier_head power_notifiers; /* Power on/off notifiers */
-- 
2.43.0

[PATCH v2 16/21] driver core: Add dev_set_drv_sync_state()

[Ulf Hansson]

From: Saravana Kannan <saravanak@google.com>

This can be used by frameworks to set the sync_state() helper functions
for drivers that don't already have them set.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 include/linux/device.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index f6ca813eebbe..fd4300e17b17 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -955,6 +955,18 @@ static inline bool dev_has_sync_state(struct device *dev)
 	return false;
 }
 
+static inline int dev_set_drv_sync_state(struct device *dev,
+					 void (*fn)(struct device *dev))
+{
+	if (!dev || !dev->driver)
+		return 0;
+	if (dev->driver->sync_state && dev->driver->sync_state != fn)
+		return -EBUSY;
+	if (!dev->driver->sync_state)
+		dev->driver->sync_state = fn;
+	return 0;
+}
+
 static inline void dev_set_removable(struct device *dev,
 				     enum device_removable removable)
 {
-- 
2.43.0

[PATCH v2 17/21] pmdomain: core: Default to use of_genpd_sync_state() for genpd providers

[Ulf Hansson]

Unless the typical platform driver that act as genpd provider, has its own
->sync_state() callback implemented let's default to use
of_genpd_sync_state().

More precisely, while adding a genpd OF provider let's assign the
->sync_state() callback, in case the fwnode has a device and its driver
doesn't have the ->sync_state() set already. In this way the typical
platform driver doesn't need to assign ->sync_state(), unless it has some
additional things to manage beyond genpds.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index c094ccbba151..b39d06d3ad26 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -2621,6 +2621,11 @@ static bool genpd_present(const struct generic_pm_domain *genpd)
 	return ret;
 }
 
+static void genpd_sync_state(struct device *dev)
+{
+	return of_genpd_sync_state(dev->of_node);
+}
+
 /**
  * of_genpd_add_provider_simple() - Register a simple PM domain provider
  * @np: Device node pointer associated with the PM domain provider.
@@ -2646,6 +2651,8 @@ int of_genpd_add_provider_simple(struct device_node *np,
 	if (!dev && !genpd_is_no_sync_state(genpd)) {
 		genpd->sync_state = GENPD_SYNC_STATE_SIMPLE;
 		device_set_node(&genpd->dev, fwnode);
+	} else {
+		dev_set_drv_sync_state(dev, genpd_sync_state);
 	}
 
 	put_device(dev);
@@ -2715,6 +2722,8 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 	dev = get_dev_from_fwnode(fwnode);
 	if (!dev)
 		sync_state = true;
+	else
+		dev_set_drv_sync_state(dev, genpd_sync_state);
 
 	put_device(dev);
 
-- 
2.43.0

[PATCH v2 18/21] pmdomain: core: Leave powered-on genpds on until late_initcall_sync

[Ulf Hansson]

Powering-off a genpd that was on during boot, before all of its consumer
devices have been probed, is certainly prone to problems.

As a step to improve this situation, let's prevent these genpds from being
powered-off until genpd_power_off_unused() gets called, which is a
late_initcall_sync().

Note that, this still doesn't guarantee that all the consumer devices has
been probed before we allow to power-off the genpds. Yet, this should be a
step in the right direction.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c   | 10 ++++++++--
 include/linux/pm_domain.h |  1 +
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index b39d06d3ad26..5d2ed4edffd7 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -934,11 +934,12 @@ static void genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
 	 * The domain is already in the "power off" state.
 	 * System suspend is in progress.
 	 * The domain is configured as always on.
+	 * The domain was on at boot and still need to stay on.
 	 * The domain has a subdomain being powered on.
 	 */
 	if (!genpd_status_on(genpd) || genpd->prepared_count > 0 ||
 	    genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd) ||
-	    atomic_read(&genpd->sd_count) > 0)
+	    genpd->stay_on || atomic_read(&genpd->sd_count) > 0)
 		return;
 
 	/*
@@ -1349,8 +1350,12 @@ static int __init genpd_power_off_unused(void)
 	pr_info("genpd: Disabling unused power domains\n");
 	mutex_lock(&gpd_list_lock);
 
-	list_for_each_entry(genpd, &gpd_list, gpd_list_node)
+	list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+		genpd_lock(genpd);
+		genpd->stay_on = false;
+		genpd_unlock(genpd);
 		genpd_queue_power_off_work(genpd);
+	}
 
 	mutex_unlock(&gpd_list_lock);
 
@@ -2375,6 +2380,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 	INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn);
 	atomic_set(&genpd->sd_count, 0);
 	genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON;
+	genpd->stay_on = !is_off;
 	genpd->sync_state = GENPD_SYNC_STATE_OFF;
 	genpd->device_count = 0;
 	genpd->provider = NULL;
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index d68e07dadc99..99556589f45e 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -199,6 +199,7 @@ struct generic_pm_domain {
 	unsigned int performance_state;	/* Aggregated max performance state */
 	cpumask_var_t cpus;		/* A cpumask of the attached CPUs */
 	bool synced_poweroff;		/* A consumer needs a synced poweroff */
+	bool stay_on;			/* Stay powered-on during boot. */
 	enum genpd_sync_state sync_state; /* How sync_state is managed. */
 	int (*power_off)(struct generic_pm_domain *domain);
 	int (*power_on)(struct generic_pm_domain *domain);
-- 
2.43.0

[PATCH v2 19/21] pmdomain: core: Leave powered-on genpds on until sync_state

[Ulf Hansson]

Powering-off a genpd that was on during boot, before all of its consumer
devices have been probed, is certainly prone to problems.

For OF based platforms we can rely on using the sync_state mechanism that
the fw_devlink provides, to understand when all consumers for a genpd
provider have been probed. Let's therefore prevent these genpds from being
powered-off until the ->sync_state() callback gets called.

Note that, for non-OF based platform we will keep relying on the
late_initcall_sync, which seems to be the best we can do for now.

Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 5d2ed4edffd7..6da25e2c81d2 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -1327,6 +1327,7 @@ static int genpd_runtime_resume(struct device *dev)
 	return ret;
 }
 
+#ifndef CONFIG_PM_GENERIC_DOMAINS_OF
 static bool pd_ignore_unused;
 static int __init pd_ignore_unused_setup(char *__unused)
 {
@@ -1362,6 +1363,7 @@ static int __init genpd_power_off_unused(void)
 	return 0;
 }
 late_initcall_sync(genpd_power_off_unused);
+#endif
 
 #ifdef CONFIG_PM_SLEEP
 
@@ -3471,6 +3473,7 @@ void of_genpd_sync_state(struct device_node *np)
 	list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
 		if (genpd->provider == of_fwnode_handle(np)) {
 			genpd_lock(genpd);
+			genpd->stay_on = false;
 			genpd_power_off(genpd, false, 0);
 			genpd_unlock(genpd);
 		}
@@ -3502,6 +3505,7 @@ static void genpd_provider_sync_state(struct device *dev)
 
 	case GENPD_SYNC_STATE_SIMPLE:
 		genpd_lock(genpd);
+		genpd->stay_on = false;
 		genpd_power_off(genpd, false, 0);
 		genpd_unlock(genpd);
 		break;
-- 
2.43.0

[PATCH v2 20/21] cpuidle: psci: Drop redundant sync_state support

[Ulf Hansson]

The recent updates to the genpd core, can entirely manage the sync_state
support for the cpuidle-psci-domain. More precisely, genpd prevents our
->power_off() callback from being invoked, until all of our consumers are
ready for it.

Let's therefore drop the sync_state support for the cpuidle-psci-domain as
it has become redundant.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/cpuidle/cpuidle-psci-domain.c | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index b880ce2df8b5..37c41209eaf9 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -28,7 +28,6 @@ struct psci_pd_provider {
 };
 
 static LIST_HEAD(psci_pd_providers);
-static bool psci_pd_allow_domain_state;
 
 static int psci_pd_power_off(struct generic_pm_domain *pd)
 {
@@ -38,9 +37,6 @@ static int psci_pd_power_off(struct generic_pm_domain *pd)
 	if (!state->data)
 		return 0;
 
-	if (!psci_pd_allow_domain_state)
-		return -EBUSY;
-
 	/* OSI mode is enabled, set the corresponding domain state. */
 	pd_state = state->data;
 	psci_set_domain_state(pd, pd->state_idx, *pd_state);
@@ -63,8 +59,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
 	if (!pd_provider)
 		goto free_pd;
 
-	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN |
-		     GENPD_FLAG_NO_SYNC_STATE;
+	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;
 
 	/*
 	 * Allow power off when OSI has been successfully enabled.
@@ -127,20 +122,6 @@ static void psci_pd_remove(void)
 	}
 }
 
-static void psci_cpuidle_domain_sync_state(struct device *dev)
-{
-	struct psci_pd_provider *pd_provider;
-
-	/*
-	 * All devices have now been attached/probed to the PM domain topology,
-	 * hence it's fine to allow domain states to be picked.
-	 */
-	psci_pd_allow_domain_state = true;
-
-	list_for_each_entry(pd_provider, &psci_pd_providers, link)
-		of_genpd_sync_state(pd_provider->node);
-}
-
 static const struct of_device_id psci_of_match[] = {
 	{ .compatible = "arm,psci-1.0" },
 	{}
@@ -201,7 +182,6 @@ static struct platform_driver psci_cpuidle_domain_driver = {
 	.driver = {
 		.name = "psci-cpuidle-domain",
 		.of_match_table = psci_of_match,
-		.sync_state = psci_cpuidle_domain_sync_state,
 	},
 };
 
-- 
2.43.0

[PATCH v2 21/21] cpuidle: riscv-sbi: Drop redundant sync_state support

[Ulf Hansson]

The recent updates to the genpd core, can entirely manage the sync_state
support for the cpuidle-riscv-sbi-domain. More precisely, genpd prevents
our ->power_off() callback from being invoked, until all of our consumers
are ready for it.

Let's therefore drop the sync_state support for the
cpuidle-riscv-sbi-domain as it has become redundant.

Cc: Anup Patel <anup@brainfault.org>
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/cpuidle/cpuidle-riscv-sbi.c | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c
index 83d58d00872f..a360bc4d20b7 100644
--- a/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ b/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -44,7 +44,6 @@ static DEFINE_PER_CPU_READ_MOSTLY(struct sbi_cpuidle_data, sbi_cpuidle_data);
 static DEFINE_PER_CPU(struct sbi_domain_state, domain_state);
 static bool sbi_cpuidle_use_osi;
 static bool sbi_cpuidle_use_cpuhp;
-static bool sbi_cpuidle_pd_allow_domain_state;
 
 static inline void sbi_set_domain_state(u32 state)
 {
@@ -345,20 +344,6 @@ static int sbi_cpuidle_init_cpu(struct device *dev, int cpu)
 	return ret;
 }
 
-static void sbi_cpuidle_domain_sync_state(struct device *dev)
-{
-	struct sbi_pd_provider *pd_provider;
-
-	/*
-	 * All devices have now been attached/probed to the PM domain
-	 * topology, hence it's fine to allow domain states to be picked.
-	 */
-	sbi_cpuidle_pd_allow_domain_state = true;
-
-	list_for_each_entry(pd_provider, &sbi_pd_providers, link)
-		of_genpd_sync_state(pd_provider->node);
-}
-
 #ifdef CONFIG_DT_IDLE_GENPD
 
 static int sbi_cpuidle_pd_power_off(struct generic_pm_domain *pd)
@@ -369,9 +354,6 @@ static int sbi_cpuidle_pd_power_off(struct generic_pm_domain *pd)
 	if (!state->data)
 		return 0;
 
-	if (!sbi_cpuidle_pd_allow_domain_state)
-		return -EBUSY;
-
 	/* OSI mode is enabled, set the corresponding domain state. */
 	pd_state = state->data;
 	sbi_set_domain_state(*pd_state);
@@ -401,8 +383,7 @@ static int sbi_pd_init(struct device_node *np)
 	if (!pd_provider)
 		goto free_pd;
 
-	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN |
-		     GENPD_FLAG_NO_SYNC_STATE;
+	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;
 
 	/* Allow power off when OSI is available. */
 	if (sbi_cpuidle_use_osi)
@@ -570,7 +551,6 @@ static struct platform_driver sbi_cpuidle_driver = {
 	.probe = sbi_cpuidle_probe,
 	.driver = {
 		.name = "sbi-cpuidle",
-		.sync_state = sbi_cpuidle_domain_sync_state,
 	},
 };
 
-- 
2.43.0

Re: [PATCH v2 09/21] pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()

[Konrad Dybcio]

On 5/23/25 3:40 PM, Ulf Hansson wrote:
> To make sure genpd tries to power off unused PM domains, let's call
> of_genpd_sync_state() from our own ->sync_state() callback.
> 
> Cc: Bjorn Andersson <andersson@kernel.org>
> Cc: Konrad Dybcio <konradybcio@kernel.org>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> ---

note: the subject is wrong - this driver is rpmpd, the other
one is rpm*h*pd (patch 10 has the correct subject)

Konrad

Re: [PATCH v2 09/21] pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()

[Ulf Hansson]

Hi Konrad,

On Fri, 23 May 2025 at 21:42, Konrad Dybcio
<konrad.dybcio@oss.qualcomm.com> wrote:
>
> On 5/23/25 3:40 PM, Ulf Hansson wrote:
> > To make sure genpd tries to power off unused PM domains, let's call
> > of_genpd_sync_state() from our own ->sync_state() callback.
> >
> > Cc: Bjorn Andersson <andersson@kernel.org>
> > Cc: Konrad Dybcio <konradybcio@kernel.org>
> > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > ---
>
> note: the subject is wrong - this driver is rpmpd, the other
> one is rpm*h*pd (patch 10 has the correct subject)

Thanks for spotting this!

BTW, would it be possible for you to run some tests on QC HW for this?
Any help would be greatly appreciated.

Kind regards
Uffe

Re: [PATCH v2 02/21] pmdomain: core: Add a bus and a driver for genpd providers

[Saravana Kannan]

On Fri, May 23, 2025 at 6:40 AM Ulf Hansson <ulf.hansson@linaro.org> wrote:
>
> When we create a genpd via pm_genpd_init() we are initializing a
> corresponding struct device for it, but we don't add the device to any
> bus_type. It has not really been needed as the device is used as cookie to
> help us manage OPP tables.
>
> However, to prepare to make better use of the device let's add a new genpd
> provider bus_type and a corresponding genpd provider driver. Subsequent
> changes will make use of this.
>
> Suggested-by: Saravana Kannan <saravanak@google.com>
> Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> ---
>  drivers/pmdomain/core.c | 89 ++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 88 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
> index 9a66b728fbbf..da515350c65b 100644
> --- a/drivers/pmdomain/core.c
> +++ b/drivers/pmdomain/core.c
> @@ -27,6 +27,11 @@
>  /* Provides a unique ID for each genpd device */
>  static DEFINE_IDA(genpd_ida);
>
> +/* The parent for genpd_provider devices. */
> +static struct device genpd_provider_bus = {
> +       .init_name = "genpd_provider",
> +};
> +
>  #define GENPD_RETRY_MAX_MS     250             /* Approximate */
>
>  #define GENPD_DEV_CALLBACK(genpd, type, callback, dev)         \
> @@ -44,6 +49,14 @@ static DEFINE_IDA(genpd_ida);
>  static LIST_HEAD(gpd_list);
>  static DEFINE_MUTEX(gpd_list_lock);
>
> +#define to_genpd_provider_drv(d) container_of(d, struct genpd_provider_drv, drv)
> +
> +struct genpd_provider_drv {
> +       struct device_driver drv;
> +       int (*probe)(struct device *dev);
> +       void (*remove)(struct device *dev);
> +};
> +
>  struct genpd_lock_ops {
>         void (*lock)(struct generic_pm_domain *genpd);
>         void (*lock_nested)(struct generic_pm_domain *genpd, int depth);
> @@ -2225,6 +2238,26 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
>         return 0;
>  }
>
> +static int genpd_provider_bus_probe(struct device *dev)
> +{
> +       struct genpd_provider_drv *drv = to_genpd_provider_drv(dev->driver);
> +
> +       return drv->probe(dev);
> +}
> +
> +static void genpd_provider_bus_remove(struct device *dev)
> +{
> +       struct genpd_provider_drv *drv = to_genpd_provider_drv(dev->driver);
> +
> +       drv->remove(dev);
> +}

Not sure if I'm missing some corner case you found out, but you don't
need these stubs just to call the drv ops. Driver core does it anyway
if the bus probe/remove functions are missing.

> +
> +static const struct bus_type genpd_provider_bus_type = {
> +       .name           = "genpd_provider",
> +       .probe          = genpd_provider_bus_probe,
> +       .remove         = genpd_provider_bus_remove,
> +};
> +
>  static void genpd_provider_release(struct device *dev)
>  {
>         /* nothing to be done here */
> @@ -2262,6 +2295,8 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd)
>         genpd->gd = gd;
>         device_initialize(&genpd->dev);
>         genpd->dev.release = genpd_provider_release;
> +       genpd->dev.bus = &genpd_provider_bus_type;
> +       genpd->dev.parent = &genpd_provider_bus;
>
>         if (!genpd_is_dev_name_fw(genpd)) {
>                 dev_set_name(&genpd->dev, "%s", genpd->name);
> @@ -3355,9 +3390,61 @@ int of_genpd_parse_idle_states(struct device_node *dn,
>  }
>  EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
>
> +static int genpd_provider_probe(struct device *dev)
> +{
> +       return 0;
> +}
> +
> +static void genpd_provider_remove(struct device *dev)
> +{
> +}

Same might apply here.

-Saravana

> +
> +static void genpd_provider_sync_state(struct device *dev)
> +{
> +}
> +
> +static struct genpd_provider_drv genpd_provider_drv = {
> +       .drv = {
> +               .name = "genpd_provider",
> +               .bus = &genpd_provider_bus_type,
> +               .sync_state = genpd_provider_sync_state,
> +               .suppress_bind_attrs = true,
> +       },
> +       .probe = genpd_provider_probe,
> +       .remove = genpd_provider_remove,
> +};
> +
>  static int __init genpd_bus_init(void)
>  {
> -       return bus_register(&genpd_bus_type);
> +       int ret;
> +
> +       ret = device_register(&genpd_provider_bus);
> +       if (ret) {
> +               put_device(&genpd_provider_bus);
> +               return ret;
> +       }
> +
> +       ret = bus_register(&genpd_provider_bus_type);
> +       if (ret)
> +               goto err_dev;
> +
> +       ret = bus_register(&genpd_bus_type);
> +       if (ret)
> +               goto err_prov_bus;
> +
> +       ret = driver_register(&genpd_provider_drv.drv);
> +       if (ret)
> +               goto err_bus;
> +
> +       return 0;
> +
> +err_bus:
> +       bus_unregister(&genpd_bus_type);
> +err_prov_bus:
> +       bus_unregister(&genpd_provider_bus_type);
> +err_dev:
> +       device_unregister(&genpd_provider_bus);
> +       return ret;
>  }
>  core_initcall(genpd_bus_init);
>
> --
> 2.43.0
>

Re: [PATCH v2 02/21] pmdomain: core: Add a bus and a driver for genpd providers

[Ulf Hansson]

On Tue, 3 Jun 2025 at 02:23, Saravana Kannan <saravanak@google.com> wrote:
>
> On Fri, May 23, 2025 at 6:40 AM Ulf Hansson <ulf.hansson@linaro.org> wrote:
> >
> > When we create a genpd via pm_genpd_init() we are initializing a
> > corresponding struct device for it, but we don't add the device to any
> > bus_type. It has not really been needed as the device is used as cookie to
> > help us manage OPP tables.
> >
> > However, to prepare to make better use of the device let's add a new genpd
> > provider bus_type and a corresponding genpd provider driver. Subsequent
> > changes will make use of this.
> >
> > Suggested-by: Saravana Kannan <saravanak@google.com>
> > Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
> > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > ---
> >  drivers/pmdomain/core.c | 89 ++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 88 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
> > index 9a66b728fbbf..da515350c65b 100644
> > --- a/drivers/pmdomain/core.c
> > +++ b/drivers/pmdomain/core.c
> > @@ -27,6 +27,11 @@
> >  /* Provides a unique ID for each genpd device */
> >  static DEFINE_IDA(genpd_ida);
> >
> > +/* The parent for genpd_provider devices. */
> > +static struct device genpd_provider_bus = {
> > +       .init_name = "genpd_provider",
> > +};
> > +
> >  #define GENPD_RETRY_MAX_MS     250             /* Approximate */
> >
> >  #define GENPD_DEV_CALLBACK(genpd, type, callback, dev)         \
> > @@ -44,6 +49,14 @@ static DEFINE_IDA(genpd_ida);
> >  static LIST_HEAD(gpd_list);
> >  static DEFINE_MUTEX(gpd_list_lock);
> >
> > +#define to_genpd_provider_drv(d) container_of(d, struct genpd_provider_drv, drv)
> > +
> > +struct genpd_provider_drv {
> > +       struct device_driver drv;
> > +       int (*probe)(struct device *dev);
> > +       void (*remove)(struct device *dev);
> > +};
> > +
> >  struct genpd_lock_ops {
> >         void (*lock)(struct generic_pm_domain *genpd);
> >         void (*lock_nested)(struct generic_pm_domain *genpd, int depth);
> > @@ -2225,6 +2238,26 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
> >         return 0;
> >  }
> >
> > +static int genpd_provider_bus_probe(struct device *dev)
> > +{
> > +       struct genpd_provider_drv *drv = to_genpd_provider_drv(dev->driver);
> > +
> > +       return drv->probe(dev);
> > +}
> > +
> > +static void genpd_provider_bus_remove(struct device *dev)
> > +{
> > +       struct genpd_provider_drv *drv = to_genpd_provider_drv(dev->driver);
> > +
> > +       drv->remove(dev);
> > +}
>
> Not sure if I'm missing some corner case you found out, but you don't
> need these stubs just to call the drv ops. Driver core does it anyway
> if the bus probe/remove functions are missing.

Right, they are probably just leftovers used for debug-prints during
development.

Thanks for spotting this!

>
> > +
> > +static const struct bus_type genpd_provider_bus_type = {
> > +       .name           = "genpd_provider",
> > +       .probe          = genpd_provider_bus_probe,
> > +       .remove         = genpd_provider_bus_remove,
> > +};
> > +
> >  static void genpd_provider_release(struct device *dev)
> >  {
> >         /* nothing to be done here */
> > @@ -2262,6 +2295,8 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd)
> >         genpd->gd = gd;
> >         device_initialize(&genpd->dev);
> >         genpd->dev.release = genpd_provider_release;
> > +       genpd->dev.bus = &genpd_provider_bus_type;
> > +       genpd->dev.parent = &genpd_provider_bus;
> >
> >         if (!genpd_is_dev_name_fw(genpd)) {
> >                 dev_set_name(&genpd->dev, "%s", genpd->name);
> > @@ -3355,9 +3390,61 @@ int of_genpd_parse_idle_states(struct device_node *dn,
> >  }
> >  EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
> >
> > +static int genpd_provider_probe(struct device *dev)
> > +{
> > +       return 0;
> > +}
> > +
> > +static void genpd_provider_remove(struct device *dev)
> > +{
> > +}
>
> Same might apply here.

Let me check and see if/what can be dropped.

I think you told me that I needed the ->probe() function to keep
fw_devlink happy, but maybe I got that wrong.

[...]

Kind regards
Uffe

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Hiago De Franco]

Hi Ulf,

On Fri, May 23, 2025 at 03:39:57PM +0200, Ulf Hansson wrote:
> Changes in v2:
> 	- Well, quite a lot as I discovered various problems when doing
> 	additional testing of corner-case. I suggest re-review from scratch,
> 	even if I decided to keep some reviewed-by tags.
> 	- Added patches to allow some drivers that needs to align or opt-out
> 	from the new common behaviour in genpd.
> 
> If a PM domain (genpd) is powered-on during boot, there is probably a good
> reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> powered-off before all of its consumer devices have been probed. This series
> intends to fix this problem.
> 
> We have been discussing these issues at LKML and at various Linux-conferences
> in the past. I have therefore tried to include the people I can recall being
> involved, but I may have forgotten some (my apologies), feel free to loop them
> in.
> 
> I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> Let me know if you want me to share this code too.
> 
> Please help review and test!
> Finally, a big thanks to Saravana for all the support!
> 
> Kind regards
> Ulf Hansson
> 
> 
> Saravana Kannan (1):
>   driver core: Add dev_set_drv_sync_state()
> 
> Ulf Hansson (20):
>   pmdomain: core: Use of_fwnode_handle()
>   pmdomain: core: Add a bus and a driver for genpd providers
>   pmdomain: core: Add the genpd->dev to the genpd provider bus
>   pmdomain: core: Export a common ->sync_state() helper for genpd
>     providers
>   pmdomain: core: Prepare to add the common ->sync_state() support
>   soc/tegra: pmc: Opt-out from genpd's common ->sync_state() support
>   cpuidle: psci: Opt-out from genpd's common ->sync_state() support
>   cpuidle: riscv-sbi: Opt-out from genpd's common ->sync_state() support
>   pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()
>   pmdomain: qcom: rpmhpd: Use of_genpd_sync_state()
>   firmware/pmdomain: xilinx: Move ->sync_state() support to firmware
>     driver
>   firmware: xilinx: Don't share zynqmp_pm_init_finalize()
>   firmware: xilinx: Use of_genpd_sync_state()
>   driver core: Export get_dev_from_fwnode()
>   pmdomain: core: Add common ->sync_state() support for genpd providers
>   pmdomain: core: Default to use of_genpd_sync_state() for genpd
>     providers
>   pmdomain: core: Leave powered-on genpds on until late_initcall_sync
>   pmdomain: core: Leave powered-on genpds on until sync_state
>   cpuidle: psci: Drop redundant sync_state support
>   cpuidle: riscv-sbi: Drop redundant sync_state support
> 
>  drivers/base/core.c                         |   8 +-
>  drivers/cpuidle/cpuidle-psci-domain.c       |  14 --
>  drivers/cpuidle/cpuidle-riscv-sbi.c         |  14 --
>  drivers/firmware/xilinx/zynqmp.c            |  18 +-
>  drivers/pmdomain/core.c                     | 239 ++++++++++++++++++--
>  drivers/pmdomain/qcom/rpmhpd.c              |   2 +
>  drivers/pmdomain/qcom/rpmpd.c               |   2 +
>  drivers/pmdomain/xilinx/zynqmp-pm-domains.c |  16 --
>  drivers/soc/tegra/pmc.c                     |  26 ++-
>  include/linux/device.h                      |  13 ++
>  include/linux/firmware/xlnx-zynqmp.h        |   6 -
>  include/linux/pm_domain.h                   |  17 ++
>  12 files changed, 294 insertions(+), 81 deletions(-)
> 
> -- 
> 2.43.0
>

Tested-by: Hiago De Franco <hiago.franco@toradex.com> # Colibri iMX8X

Best Regards,
Hiago.

Re: [PATCH v2 01/21] pmdomain: core: Use of_fwnode_handle()

[Dhruva Gole]

On May 23, 2025 at 15:39:58 +0200, Ulf Hansson wrote:
> Let's avoid accessing the np->fwnode directly and use the common helper
> of_fwnode_handle() instead.
> 
> Suggested-by: Saravana Kannan <saravanak@google.com>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> ---

Reviewed-by: Dhruva Gole <d-gole@ti.com>

-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Tomi Valkeinen]

On 23/05/2025 16:39, Ulf Hansson wrote:
> Changes in v2:
> 	- Well, quite a lot as I discovered various problems when doing
> 	additional testing of corner-case. I suggest re-review from scratch,
> 	even if I decided to keep some reviewed-by tags.
> 	- Added patches to allow some drivers that needs to align or opt-out
> 	from the new common behaviour in genpd.
> 
> If a PM domain (genpd) is powered-on during boot, there is probably a good
> reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> powered-off before all of its consumer devices have been probed. This series
> intends to fix this problem.
> 
> We have been discussing these issues at LKML and at various Linux-conferences
> in the past. I have therefore tried to include the people I can recall being
> involved, but I may have forgotten some (my apologies), feel free to loop them
> in.
> 
> I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> Let me know if you want me to share this code too.
> 
> Please help review and test!
> Finally, a big thanks to Saravana for all the support!

For TI AM62A and Xilinx ZynqMP ZCU106:

Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

 Tomi

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Tomi Valkeinen]

[-- Attachment #1: Type: text/plain, Size: 1344 bytes --]

Hi Ulf,

On 23/05/2025 16:39, Ulf Hansson wrote:
> Changes in v2:
> 	- Well, quite a lot as I discovered various problems when doing
> 	additional testing of corner-case. I suggest re-review from scratch,
> 	even if I decided to keep some reviewed-by tags.
> 	- Added patches to allow some drivers that needs to align or opt-out
> 	from the new common behaviour in genpd.
> 
> If a PM domain (genpd) is powered-on during boot, there is probably a good
> reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> powered-off before all of its consumer devices have been probed. This series
> intends to fix this problem.
> 
> We have been discussing these issues at LKML and at various Linux-conferences
> in the past. I have therefore tried to include the people I can recall being
> involved, but I may have forgotten some (my apologies), feel free to loop them
> in.
> 
> I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> Let me know if you want me to share this code too.
> 
> Please help review and test!

I tested this Renesas white-hawk board, and it hangs at boot. With
earlycon, I captured with/without boot logs, attached.

The hang case doesn't look very healthy with all these: "kobject:
'(null)' ((____ptrval____)): is not initialized, yet kobject_get() is
being called."

 Tomi

[-- Attachment #2: minicom-hang.log --]
[-- Type: text/x-log, Size: 50527 bytes --]

N:ICUMX Loader Rev.0.14.0
N:Built : 08:22:19, Sep 22 2022
N:PRR is R-Car V4H Ver1.0
N:Boot device is QSPI Flash(40MHz)
N:LCM state is CM
N:Normal boot(ICUMX)
N:======== content cert info ========
destination address:0xfde30000
physical destination address:0xeb230000
source address:0x08240000
size:0x00001000
N:======== content of SA9 ========
address:0xeb231000 size:0x00009000
N:BL2: DDR6400(rev.0.07rc22)N:BL2: [COLD_BOOT]
N:..0
N:QoS setting(rev.0.03)
N:DRAM refresh interval 1.91 usec
N:Periodic Write DQ Training
N:======== Cx IPL image load info ========
load address 	= 0xe6300000
image size 	= 0x00030000
source address 	= 0x08480000
N:======== Secure FW image load info ========
load address 	= 0xeb240000
image size 	= 0x000bc000
source address 	= 0x08280000
N:CR52 Loader Program Rev.0.12.0
N:Built : 17:32:51, Aug 23 2022
N:PRR is R-Car V4H Ver.1.0
N:======== RTOS image load info ========
N:load address 	= 0xe2100000
image size 	= 0x01000000
source address 	= (p:1)0x00000000
N:Load finish.

Dummy FW Program
Dummy FW Program boot end
N:======== CA Program #1 image load info ========
N:load address 	= 0x46400000
image size 	= 0x00022000
source address 	= (p:1)0x01400000
N:======== CA Program #2 image load info ========
N:load address 	= 0x50000000
image size 	= 0x00200000
source address 	= (p:1)0x01580000
N:LoNadO fTinIisCh.E(C:R5 2  LoBadLer3)-
1 : Rev.0.6.0
NOTICE:  BL31: v2.5(release): 
NOTICE:  BL31: Built : 21:46:00, Aug 28 2022


U-Boot 2022.01 (Oct 04 2022 - 08:08:52 +0000)

CPU:   Renesas Electronics R8A779G0 rev 1.0
Model: Renesas White Hawk CPU and Breakout boards based on r8a779g0
DRAM:  7.9 GiB
RAM Configuration:
Bank #0: 0x048000000 - 0x0bfffffff, 1.9 GiB
Bank #1: 0x480000000 - 0x4ffffffff, 2 GiB
Bank #2: 0x600000000 - 0x6ffffffff, 4 GiB

MMC:   mmc@ee140000: 0
Loading Environment from MMC...   
Dummy RTOS Program
Dummy RTOS Program boot end
OK
In:    serial@e6540000
Out:   serial@e6540000
Err:   serial@e6540000
Net:   eth0: ethernet@e6800000
Hit any key to stop autoboot:  2 \b\b\b 1 \b\b\b 0 
ethernet@e6800000 Waiting for PHY auto negotiation to complete....... done
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
DHCP client bound to address 192.168.89.102 (3755 ms)
Using ethernet@e6800000 device
TFTP from server 192.168.88.20; our IP address is 192.168.89.102; sending through gateway 192.168.89.1
Filename 'renesas-v4h.txt'.
Load address: 0x58000000
Loading: *\b#
	 351.6 KiB/s
done
Bytes transferred = 720 (2d0 hex)
Using ethernet@e6800000 device
TFTP from server 192.168.88.20; our IP address is 192.168.89.102; sending through gateway 192.168.89.1
Filename 'linux/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dtb'.
Load address: 0x48000000
Loading: *\b#####
	 9.1 MiB/s
done
Bytes transferred = 66629 (10445 hex)
Using ethernet@e6800000 device
TFTP from server 192.168.88.20; our IP address is 192.168.89.102; sending through gateway 192.168.89.1
Filename 'linux/arch/arm64/boot/Image'.
Load address: 0x48080000
Loading: *\b#################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 ####################################################
	 9 MiB/s
done
Bytes transferred = 36067840 (2265a00 hex)
Moving Image from 0x48080000 to 0x48200000, end=4b470000
## Flattened Device Tree blob at 48000000
   Booting using the fdt blob at 0x48000000
   Loading Device Tree to 0000000057efd000, end 0000000057ffffff ... OK

Starting kernel ...

Booting Linux on physical CPU 0x0000000000 [0x414fd0b1]
Linux version 6.16.0-rc1+ (tomba@deskari) (aarch64-linux-gnu-gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, GNU ld (GNU Binutils for Ubuntu) 2.42) #5 SMP PREEMPT Fri Jun 13 13:23:39 EEST 2025
Machine model: Renesas White Hawk CPU and Breakout boards based on r8a779g0
efi: UEFI not found.
earlycon: hscif0 at MMIO 0x00000000e6540000 (options '921600n8')
printk: legacy bootconsole [hscif0] enabled
OF: reserved mem: Reserved memory: No reserved-memory node in the DT
NUMA: Faking a node at [mem 0x0000000048000000-0x00000006ffffffff]
NODE_DATA(0) allocated [mem 0x6fefd3940-0x6fefd657f]
Zone ranges:
  DMA      [mem 0x0000000048000000-0x00000000ffffffff]
  DMA32    empty
  Normal   [mem 0x0000000100000000-0x00000006ffffffff]
Movable zone start for each node
Early memory node ranges
  node   0: [mem 0x0000000048000000-0x00000000bfffffff]
  node   0: [mem 0x0000000480000000-0x00000004ffffffff]
  node   0: [mem 0x0000000600000000-0x00000006ffffffff]
Initmem setup node 0 [mem 0x0000000048000000-0x00000006ffffffff]
cma: Reserved 256 MiB at 0x00000000b0000000
psci: probing for conduit method from DT.
psci: PSCIv1.1 detected in firmware.
psci: Using standard PSCI v0.2 function IDs
psci: MIGRATE_INFO_TYPE not supported.
psci: SMC Calling Convention v1.2
percpu: Embedded 33 pages/cpu s98192 r8192 d28784 u135168
Detected PIPT I-cache on CPU0
CPU features: detected: GIC system register CPU interface
CPU features: detected: Spectre-v4
CPU features: detected: Spectre-BHB
CPU features: detected: SSBS not fully self-synchronizing
alternatives: applying boot alternatives
Kernel command line: console=ttySC0,921600n8 root=/dev/nfs rw nfsroot=/home/tomba/nfs/rootfs64,v3,tcp ip=::::buildroot:eth0:dhcp cma=256M no_console_suspend earlycon
printk: log buffer data + meta data: 131072 + 458752 = 589824 bytes
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, linear)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, linear)
software IO TLB: area num 4.
software IO TLB: mapped [mem 0x00000000ac000000-0x00000000b0000000] (64MB)
Fallback order for Node 0: 0 
Built 1 zonelists, mobility grouping on.  Total pages: 2064384
Policy zone: Normal
mem auto-init: stack:all(zero), heap alloc:off, heap free:off
stackdepot: allocating hash table via alloc_large_system_hash
stackdepot hash table entries: 524288 (order: 11, 8388608 bytes, linear)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
ftrace: allocating 52774 entries in 208 pages
ftrace: allocated 208 pages with 3 groups
Running RCU self tests
Running RCU synchronous self tests
rcu: Preemptible hierarchical RCU implementation.
rcu: 	RCU event tracing is enabled.
rcu: 	RCU lockdep checking is enabled.
rcu: 	RCU restricting CPUs from NR_CPUS=512 to nr_cpu_ids=4.
	Trampoline variant of Tasks RCU enabled.
	Rude variant of Tasks RCU enabled.
	Tracing variant of Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
Running RCU synchronous self tests
RCU Tasks: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
RCU Tasks Rude: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
RCU Tasks Trace: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
GICv3: 960 SPIs implemented
GICv3: 0 Extended SPIs implemented
Root IRQ handler: gic_handle_irq
GICv3: GICv3 features: 16 PPIs
GICv3: GICD_CTRL.DS=0, SCR_EL3.FIQ=0
GICv3: CPU0: found redistributor 0 region 0:0x00000000f1060000
ITS: No ITS available, not enabling LPIs
rcu: srcu_init: Setting srcu_struct sizes based on contention.
arch_timer: cp15 timer(s) running at 16.66MHz (virt).
clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x3d805247c, max_idle_ns: 440795202618 ns
sched_clock: 56 bits at 17MHz, resolution 60ns, wraps every 2199023255545ns
Console: colour dummy device 80x25
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:  8
... MAX_LOCK_DEPTH:          48
... MAX_LOCKDEP_KEYS:        8192
... CLASSHASH_SIZE:          4096
... MAX_LOCKDEP_ENTRIES:     32768
... MAX_LOCKDEP_CHAINS:      65536
... CHAINHASH_SIZE:          32768
 memory used by lock dependency info: 6429 kB
 memory used for stack traces: 4224 kB
 per task-struct memory footprint: 1920 bytes
Calibrating delay loop (skipped), value calculated using timer frequency.. 33.33 BogoMIPS (lpj=66666)
pid_max: default: 32768 minimum: 301
LSM: initializing lsm=capability
Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
Running RCU synchronous self tests
Running RCU synchronous self tests
rcu: Hierarchical SRCU implementation.
rcu: 	Max phase no-delay instances is 1000.
Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode level
Detected Renesas R-Car Gen4 r8a779g0 ES1.0
------------[ cut here ]------------
kobject: '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 0 PID: 1 at lib/kobject.c:640 kobject_get+0x84/0xc0
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.16.0-rc1+ #5 PREEMPT 
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kobject_get+0x84/0xc0
lr : kobject_get+0x84/0xc0
sp : ffff80008328bbe0
x29: ffff80008328bbe0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff800082130b00
x20: ffff000440322c00 x19: ffff800082130548 x18: 00000000ffffffff
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 696e6920746f6e20
x14: 7369203a29295f5f x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800081fea210 x9 : ffff80008010fad0
x8 : 00000000ffffefff x7 : ffff800081fea210 x6 : 80000000fffff000
x5 : 0000000000000066 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 kobject_get+0x84/0xc0 (P)
 device_add+0x80/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3284
hardirqs last  enabled at (3283): [<ffff80008010ad94>] __up_console_sem+0x74/0x90
hardirqs last disabled at (3284): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (2520): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (2373): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 0 PID: 1 at lib/refcount.c:25 refcount_warn_saturate+0x120/0x148
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.16.0-rc1+ #5 PREEMPT 
Tainted: [W]=WARN
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x120/0x148
lr : refcount_warn_saturate+0x120/0x148
sp : ffff80008328bbd0
x29: ffff80008328bbd0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff800082130b00
x20: ffff000440322c00 x19: ffff800082130548 x18: 00000000ffffffff
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 0000000000000028
x14: 0000000000000001 x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800082992000 x9 : ffff8000810a4434
x8 : ffff80008328b908 x7 : 0000000000000000 x6 : ffff80008328b9e0
x5 : ffff80008328b968 x4 : 0000000000000000 x3 : 0000000000000001
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 refcount_warn_saturate+0x120/0x148 (P)
 kobject_get+0xb8/0xc0
 device_add+0x80/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3316
hardirqs last  enabled at (3315): [<ffff8000800aaef0>] finish_task_switch.isra.0+0xb0/0x2a0
hardirqs last disabled at (3316): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (3296): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (3287): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kobject: '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 0 PID: 1 at lib/kobject.c:640 kobject_get+0x84/0xc0
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.16.0-rc1+ #5 PREEMPT 
Tainted: [W]=WARN
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kobject_get+0x84/0xc0
lr : kobject_get+0x84/0xc0
sp : ffff80008328bad0
x29: ffff80008328bad0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff800082130548
x20: ffff000440153800 x19: ffff800082130548 x18: 00000000ffffffff
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 0000000000000028
x14: 0000000000000001 x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800082992000 x9 : ffff8000810a4434
x8 : ffff80008328b808 x7 : 0000000000000000 x6 : ffff80008328b8e0
x5 : ffff80008328b868 x4 : 0000000000000000 x3 : 0000000000000001
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 kobject_get+0x84/0xc0 (P)
 kobject_add_internal+0x34/0x2e8
 kobject_add+0xa0/0x118
 device_add+0xd0/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3366
hardirqs last  enabled at (3365): [<ffff8000800aaef0>] finish_task_switch.isra.0+0xb0/0x2a0
hardirqs last disabled at (3366): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (3346): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (3319): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
refcount_t: saturated; leaking memory.
WARNING: CPU: 0 PID: 1 at lib/refcount.c:22 refcount_warn_saturate+0x74/0x148
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.16.0-rc1+ #5 PREEMPT 
Tainted: [W]=WARN
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x74/0x148
lr : refcount_warn_saturate+0x74/0x148
sp : ffff80008328bac0
x29: ffff80008328bac0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff800082130548
x20: ffff000440153800 x19: ffff800082130548 x18: 00000000ffffffff
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 0000000000000028
x14: 0000000000000001 x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800081fea210 x9 : ffff80008010fad0
x8 : 00000000ffffefff x7 : ffff800081fea210 x6 : 80000000fffff000
x5 : 00000000000000d4 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 refcount_warn_saturate+0x74/0x148 (P)
 kobject_get+0x9c/0xc0
 kobject_add_internal+0x34/0x2e8
 kobject_add+0xa0/0x118
 device_add+0xd0/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3392
hardirqs last  enabled at (3391): [<ffff80008010ad94>] __up_console_sem+0x74/0x90
hardirqs last disabled at (3392): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (3374): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (3369): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kobject: '(null)' ((____ptrval____)): is not initialized, yet kobject_put() is being called.
WARNING: CPU: 0 PID: 1 at lib/kobject.c:734 kobject_put+0xf0/0x218
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.16.0-rc1+ #5 PREEMPT 
Tainted: [W]=WARN
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kobject_put+0xf0/0x218
lr : kobject_put+0xf0/0x218
sp : ffff80008328bac0
x29: ffff80008328bac0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff8000812839f8
x20: 00000000fffffffe x19: ffff800082130548 x18: 00000000ffffffff
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 696e6920746f6e20
x14: 7369203a29295f5f x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800081fea210 x9 : ffff80008010fad0
x8 : 00000000ffffefff x7 : ffff800081fea210 x6 : 80000000fffff000
x5 : 00000000000000fb x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 kobject_put+0xf0/0x218 (P)
 kobject_add_internal+0x1e8/0x2e8
 kobject_add+0xa0/0x118
 device_add+0xd0/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3412
hardirqs last  enabled at (3411): [<ffff80008010ad94>] __up_console_sem+0x74/0x90
hardirqs last disabled at (3412): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (3374): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (3369): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 1 at lib/refcount.c:28 refcount_warn_saturate+0xf4/0x148
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.16.0-rc1+ #5 PREEMPT 
Tainted: [W]=WARN
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0xf4/0x148
lr : refcount_warn_saturate+0xf4/0x148
sp : ffff80008328bab0
x29: ffff80008328bab0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff8000812839f8
x20: 00000000fffffffe x19: ffff800082130548 x18: 00000000ffffffff
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 696e6920746f6e20
x14: 7369203a29295f5f x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800081fea210 x9 : ffff80008010fad0
x8 : 00000000ffffefff x7 : ffff800081fea210 x6 : 80000000fffff000
x5 : 0000000000000121 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 refcount_warn_saturate+0xf4/0x148 (P)
 kobject_put+0x16c/0x218
 kobject_add_internal+0x1e8/0x2e8
 kobject_add+0xa0/0x118
 device_add+0xd0/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3432
hardirqs last  enabled at (3431): [<ffff80008010ad94>] __up_console_sem+0x74/0x90
hardirqs last disabled at (3432): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (3374): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (3369): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
kobject: kobject_add_internal failed for a1e0d0c0 (error: -2 parent: (null))
------------[ cut here ]------------
kobject: '(null)' ((____ptrval____)): is not initialized, yet kobject_put() is being called.
WARNING: CPU: 0 PID: 1 at lib/kobject.c:734 kobject_put+0xf0/0x218
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G        W           6.16.0-rc1+ #5 PREEMPT 
Tainted: [W]=WARN
Hardware name: Renesas White Hawk CPU and Breakout boards based on r8a779g0 (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kobject_put+0xf0/0x218
lr : kobject_put+0xf0/0x218
sp : ffff80008328bbd0
x29: ffff80008328bbd0 x28: ffff000440153800 x27: ffff800082130538
x26: 0000000000000000 x25: 0000000000000000 x24: ffff0006befea6c8
x23: ffff0006befea6b0 x22: ffff800082130548 x21: ffff800082130548
x20: 00000000fffffffe x19: ffff800082130548 x18: 00000000fffffffe
x17: 6f6b20746579202c x16: 64657a696c616974 x15: 696e6920746f6e20
x14: 7369203a29295f5f x13: 00000000000c0000 x12: 0000000000000000
x11: ffff8000819c4484 x10: ffff800081fea210 x9 : ffff80008010fad0
x8 : 00000000ffffefff x7 : ffff800081fea210 x6 : 80000000fffff000
x5 : 0000000000000149 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000440888000
Call trace:
 kobject_put+0xf0/0x218 (P)
 device_add+0x14c/0x830
 of_genpd_add_provider_onecell+0x1c4/0x2c8
 rcar_gen4_sysc_pd_init+0x3a0/0x420
 do_one_initcall+0x84/0x358
 kernel_init_freeable+0x178/0x508
 kernel_init+0x28/0x1f0
 ret_from_fork+0x10/0x20
irq event stamp: 3460
hardirqs last  enabled at (3459): [<ffff80008010ad94>] __up_console_sem+0x74/0x90
hardirqs last disabled at (3460): [<ffff8000810a1bd4>] el1_dbg+0x24/0x90
softirqs last  enabled at (3374): [<ffff800080065dd0>] handle_softirqs+0x4a0/0x4c0
softirqs last disabled at (3369): [<ffff800080010224>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
EFI services will not be available.
smp: Bringing up secondary CPUs ...
Detected PIPT I-cache on CPU1
GICv3: CPU1: found redistributor 100 region 0:0x00000000f1080000
CPU1: Booted secondary processor 0x0000000100 [0x414fd0b1]
Detected PIPT I-cache on CPU2
GICv3: CPU2: found redistributor 10000 region 0:0x00000000f10a0000
CPU2: Booted secondary processor 0x0000010000 [0x414fd0b1]
Detected PIPT I-cache on CPU3
GICv3: CPU3: found redistributor 10100 region 0:0x00000000f10c0000
CPU3: Booted secondary processor 0x0000010100 [0x414fd0b1]
smp: Brought up 1 node, 4 CPUs
SMP: Total of 4 processors activated.
CPU: All CPU(s) started at EL1
CPU features: detected: 32-bit EL0 Support
CPU features: detected: Data cache clean to the PoU not required for I/D coherence
CPU features: detected: Common not Private translations
CPU features: detected: CRC32 instructions
CPU features: detected: RCpc load-acquire (LDAPR)
CPU features: detected: LSE atomic instructions
CPU features: detected: Privileged Access Never
CPU features: detected: PMUv3
CPU features: detected: RAS Extension Support
CPU features: detected: Speculative Store Bypassing Safe (SSBS)
alternatives: applying system-wide alternatives
CPU features: detected: Hardware dirty bit management on CPU0-3
Memory: 7702560K/8257536K available (17088K kernel code, 3094K rwdata, 7520K rodata, 7360K init, 16333K bss, 284640K reserved, 262144K cma-reserved)
devtmpfs: initialized
Running RCU synchronous self tests
Running RCU synchronous self tests
Running RCU Tasks wait API self tests
Running RCU Tasks Rude wait API self tests
Running RCU Tasks Trace wait API self tests
DMA-API: preallocated 65536 debug entries
DMA-API: debugging enabled by kernel config
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
posixtimers hash table entries: 2048 (order: 5, 147456 bytes, linear)
futex hash table entries: 1024 (131072 bytes on 1 NUMA nodes, total 128 KiB, linear).
19856 pages in range for non-PLT usage
511376 pages in range for PLT usage
pinctrl core: initialized pinctrl subsystem
DMI not present or invalid.
NET: Registered PF_NETLINK/PF_ROUTE protocol family
DMA: preallocated 1024 KiB GFP_KERNEL pool for atomic allocations
DMA: preallocated 1024 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
DMA: preallocated 1024 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
audit: initializing netlink subsys (disabled)
audit: type=2000 audit(0.192:1): state=initialized audit_enabled=0 res=1
thermal_sys: Registered thermal governor 'step_wise'
thermal_sys: Registered thermal governor 'power_allocator'
cpuidle: using governor menu
Callback from call_rcu_tasks_trace() invoked.
hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
ASID allocator initialised with 65536 entries
Serial: AMBA PL011 UART driver
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/video@e6ef0000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef1000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef2000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef3000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef4000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef5000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef6000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef7000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef8000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef9000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efa000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efb000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efc000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efd000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efe000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6eff000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/interrupt-controller@f1000000: Fixed dependency cycle(s) with /soc/interrupt-controller@f1000000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@49
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@4b
/soc/display@feb00000: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef7000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef6000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef5000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef4000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef3000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef2000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef1000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef0000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6eff000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efe000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efd000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efc000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efb000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efa000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef9000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef8000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/display@feb00000
/soc/pinctrl@e6050000: Fixed dependency cycle(s) with /soc/pinctrl@e6050000/scif_clk
sh-pfc e6050000.pinctrl: r8a779g0_pfc support registered
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/video@e6ef0000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef1000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef2000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef3000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef4000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef5000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef6000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef7000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef8000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef9000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efa000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efb000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efc000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efd000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efe000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6eff000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@49
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@4b
/soc/display@feb00000: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef7000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef6000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef5000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef4000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef3000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef2000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef1000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef0000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef7000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef6000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef5000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef4000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef3000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef2000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef1000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef0000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6eff000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efe000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efd000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efc000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efb000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efa000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef9000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef8000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6eff000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efe000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efd000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efc000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efb000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efa000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef9000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef8000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/display@feb00000: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/display@feb00000
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /mini-dp-con
/mini-dp-con: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
HugeTLB: allocation took 0ms with hugepage_allocation_threads=1
HugeTLB: allocation took 0ms with hugepage_allocation_threads=1
HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 1.00 GiB page
HugeTLB: registered 32.0 MiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 32.0 MiB page
HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 2.00 MiB page
HugeTLB: registered 64.0 KiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 64.0 KiB page
ACPI: Interpreter disabled.
iommu: Default domain type: Translated
iommu: DMA domain TLB invalidation policy: strict mode
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
scmi_core: SCMI protocol bus registered
FPGA manager framework
Advanced Linux Sound Architecture Driver Initialized.
vgaarb: loaded
clocksource: Switched to clocksource arch_sys_counter
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
pnp: PnP ACPI: disabled
NET: Registered PF_INET protocol family
IP idents hash table entries: 131072 (order: 8, 1048576 bytes, linear)
tcp_listen_portaddr_hash hash table entries: 4096 (order: 6, 294912 bytes, linear)
Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
TCP established hash table entries: 65536 (order: 7, 524288 bytes, linear)
TCP bind hash table entries: 65536 (order: 11, 9437184 bytes, vmalloc hugepage)
TCP: Hash tables configured (established 65536 bind 65536)
UDP hash table entries: 4096 (order: 8, 1048576 bytes, linear)
UDP-Lite hash table entries: 4096 (order: 8, 1048576 bytes, linear)
NET: Registered PF_UNIX/PF_LOCAL protocol family
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp-with-tls transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
PCI: CLS 0 bytes, default 64
Initialise system trusted keyrings
workingset: timestamp_bits=42 max_order=21 bucket_order=0
squashfs: version 4.0 (2009/01/31) Phillip Lougher
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
nfs4filelayout_init: NFSv4 File Layout Driver Registering...
nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
Callback from call_rcu_tasks() invoked.
Key type asymmetric registered
Asymmetric key parser 'x509' registered
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 245)
io scheduler mq-deadline registered
io scheduler kyber registered
io scheduler bfq registered
ledtrig-cpu: registered to indicate activity on CPUs
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
SuperH (H)SCI(F) driver initialized
loop: module loaded
tun: Universal TUN/TAP device driver, 1.6
thunder_xcv, ver 1.0
thunder_bgx, ver 1.0
nicpf, ver 1.0
hns3: Hisilicon Ethernet Network Driver for Hip08 Family - version
hns3: Copyright (c) 2017 Huawei Corporation.
hclge is initializing
e1000: Intel(R) PRO/1000 Network Driver
e1000: Copyright (c) 1999-2006 Intel Corporation.
e1000e: Intel(R) PRO/1000 Network Driver
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
igb: Intel(R) Gigabit Ethernet Network Driver
igb: Copyright (c) 2007-2014 Intel Corporation.
igbvf: Intel(R) Gigabit Virtual Function Network Driver
igbvf: Copyright (c) 2009 - 2012 Intel Corporation.
sky2: driver version 1.30
VFIO - User Level meta-driver version: 0.3
i2c_dev: i2c /dev entries driver
cpufreq: cpufreq_policy_online: CPU0: Running at unlisted initial frequency: 1699999 kHz, changing to: 1700000 kHz
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
Synopsys Designware Multimedia Card Interface Driver
sdhci-pltfm: SDHCI platform and OF driver helper
SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
hw perfevents: enabled with armv8_cortex_a76 PMU driver, 7 (0,8000003f) counters available
watchdog: NMI not fully supported
watchdog: Hard watchdog permanently disabled
NET: Registered PF_PACKET protocol family
Key type dns_resolver registered
registered taskstats version 1
Loading compiled-in X.509 certificates
Demotion targets for Node 0: null
kmemleak: Kernel memory leak detector initialized (mem pool available: 15793)
kmemleak: Automatic memory scanning thread started
Trying to probe devices needed for running init ...
renesas_irqc e61c0000.interrupt-controller: deferred probe timeout, ignoring dependency
renesas_irqc e61c0000.interrupt-controller: probe with driver renesas_irqc failed with error -110
gpio_rcar e6050180.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6050180.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6050980.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6050980.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6058180.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6058180.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6058980.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6058980.gpio: probe with driver gpio_rcar failed with error -110
renesas_sdhi_internal_dmac ee140000.mmc: deferred probe timeout, ignoring dependency
gpio_rcar e6060180.gpio: deferred probe timeout, ignoring dependency
renesas_sdhi_internal_dmac ee140000.mmc: deferred probe timeout, ignoring dependency
gpio_rcar e6060180.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6060980.gpio: deferred probe timeout, ignoring dependency
renesas_sdhi_internal_dmac ee140000.mmc: probe with driver renesas_sdhi_internal_dmac failed with error -110
gpio_rcar e6060980.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6061180.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6061180.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6061980.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6061980.gpio: probe with driver gpio_rcar failed with error -110
gpio_rcar e6068180.gpio: deferred probe timeout, ignoring dependency
gpio_rcar e6068180.gpio: probe with driver gpio_rcar failed with error -110
rcar-dmac e7350000.dma-controller: deferred probe timeout, ignoring dependency
rcar-dmac e7350000.dma-controller: deferred probe timeout, ignoring dependency
rcar-dmac e7350000.dma-controller: probe with driver rcar-dmac failed with error -110
rcar-dmac e7351000.dma-controller: deferred probe timeout, ignoring dependency
rcar-dmac e7351000.dma-controller: deferred probe timeout, ignoring dependency
rcar-dmac e7351000.dma-controller: probe with driver rcar-dmac failed with error -110
sh-sci e6540000.serial: deferred probe timeout, ignoring dependency
sh-sci e6540000.serial: probe with driver sh-sci failed with error -110
ipmmu-vmsa ee480000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa ee480000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa ee4c0000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa ee4c0000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eed00000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eed00000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eed40000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eed40000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eed80000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eed80000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eedc0000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eedc0000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eee00000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eee00000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eee80000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eee80000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eeec0000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eeec0000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eef00000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eef00000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eef40000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eef40000.iommu: probe with driver ipmmu-vmsa failed with error -110
ipmmu-vmsa eefc0000.iommu: deferred probe timeout, ignoring dependency
ipmmu-vmsa eefc0000.iommu: probe with driver ipmmu-vmsa failed with error -110
ravb e6800000.ethernet: deferred probe timeout, ignoring dependency
ravb e6800000.ethernet: deferred probe timeout, ignoring dependency
ravb e6800000.ethernet: probe with driver ravb failed with error -110
ravb e6810000.ethernet: deferred probe timeout, ignoring dependency
ravb e6810000.ethernet: deferred probe timeout, ignoring dependency
ravb e6810000.ethernet: probe with driver ravb failed with error -110
ravb e6820000.ethernet: deferred probe timeout, ignoring dependency
ravb e6820000.ethernet: deferred probe timeout, ignoring dependency
ravb e6820000.ethernet: probe with driver ravb failed with error -110
i2c-rcar e6500000.i2c: deferred probe timeout, ignoring dependency
i2c-rcar e6500000.i2c: probe with driver i2c-rcar failed with error -110
i2c-rcar e6508000.i2c: deferred probe timeout, ignoring dependency
i2c-rcar e6508000.i2c: probe with driver i2c-rcar failed with error -110
rcar_gen3_thermal e6198000.thermal: deferred probe timeout, ignoring dependency
rcar_gen3_thermal e6198000.thermal: probe with driver rcar_gen3_thermal failed with error -110
renesas_wdt e6020000.watchdog: deferred probe timeout, ignoring dependency
renesas_wdt e6020000.watchdog: probe with driver renesas_wdt failed with error -110
platform leds: deferred probe pending: leds-gpio: Failed to get GPIO '/leds/led-1'
platform pcie0-clkref: deferred probe pending: platform: supplier e6060180.gpio not ready
platform keys: deferred probe pending: gpio-keys: failed to get gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6068180.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6061980.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6061180.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6060980.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6060180.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6058980.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6058180.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6050980.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6050180.gpio
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6020000.watchdog
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6198000.thermal
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e61c0000.interrupt-controller
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6500000.i2c
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6508000.i2c
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6540000.serial
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e65d0000.pcie
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6660000.can
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6800000.ethernet
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6810000.ethernet
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6820000.ethernet
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef0000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef1000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef2000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef3000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef4000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef5000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef6000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef7000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef8000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6ef9000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6efa000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6efb000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6efc000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6efd000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6efe000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e6eff000.video
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e7350000.dma-controller
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to e7351000.dma-controller
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to ee140000.mmc
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to ee200000.spi
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fe500000.csi2
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fe540000.csi2
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fea10000.fcp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fea11000.fcp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fedb0000.fcp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fedb8000.fcp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fea20000.vsp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fea28000.vsp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fedd0000.vsp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fedd8000.vsp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to feb00000.display
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fed00000.isp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fed20000.isp
renesas-cpg-mssr e6150000.clock-controller: sync_state() pending due to fed80000.dsi-encoder
clk: Disabling unused clocks

[-- Attachment #3: minicom-ok.log --]
[-- Type: text/x-log, Size: 31105 bytes --]

N:ICUMX Loader Rev.0.14.0
N:Built : 08:22:19, Sep 22 2022
N:PRR is R-Car V4H Ver1.0
N:Boot device is QSPI Flash(40MHz)
N:LCM state is CM
N:Normal boot(ICUMX)
N:======== content cert info ========
destination address:0xfde30000
physical destination address:0xeb230000
source address:0x08240000
size:0x00001000
N:======== content of SA9 ========
address:0xeb231000 size:0x00009000
N:BL2: DDR6400(rev.0.07rc22)N:BL2: [COLD_BOOT]
N:..0
N:QoS setting(rev.0.03)
N:DRAM refresh interval 1.91 usec
N:Periodic Write DQ Training
N:======== Cx IPL image load info ========
load address 	= 0xe6300000
image size 	= 0x00030000
source address 	= 0x08480000
N:======== Secure FW image load info ========
load address 	= 0xeb240000
image size 	= 0x000bc000
source address 	= 0x08280000
N:CR52 Loader Program Rev.0.12.0
N:Built : 17:32:51, Aug 23 2022
N:PRR is R-Car V4H Ver.1.0
N:======== RTOS image load info ========
N:load address 	= 0xe2100000
image size 	= 0x01000000
source address 	= (p:1)0x00000000
N:Load finish.

Dummy FW Program
Dummy FW Program boot end
N:======== CA Program #1 image load info ========
N:load address 	= 0x46400000
image size 	= 0x00022000
source address 	= (p:1)0x01400000
N:======== CA Program #2 image load info ========
N:load address 	= 0x50000000
image size 	= 0x00200000
source address 	= (p:1)0x01580000
N:LoNadO fTinIisCh.E(C:R5 2  LoBadLer3)-
1 : Rev.0.6.0
NOTICE:  BL31: v2.5(release): 
NOTICE:  BL31: Built : 21:46:00, Aug 28 2022


U-Boot 2022.01 (Oct 04 2022 - 08:08:52 +0000)

CPU:   Renesas Electronics R8A779G0 rev 1.0
Model: Renesas White Hawk CPU and Breakout boards based on r8a779g0
DRAM:  7.9 GiB
RAM Configuration:
Bank #0: 0x048000000 - 0x0bfffffff, 1.9 GiB
Bank #1: 0x480000000 - 0x4ffffffff, 2 GiB
Bank #2: 0x600000000 - 0x6ffffffff, 4 GiB

MMC:   mmc@ee140000: 0
Loading Environment from MMC...   
Dummy RTOS Program
Dummy RTOS Program boot end
OK
In:    serial@e6540000
Out:   serial@e6540000
Err:   serial@e6540000
Net:   eth0: ethernet@e6800000
Hit any key to stop autoboot:  2 \b\b\b 1 \b\b\b 0 
ethernet@e6800000 Waiting for PHY auto negotiation to complete....... done
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
DHCP client bound to address 192.168.89.102 (3755 ms)
Using ethernet@e6800000 device
TFTP from server 192.168.88.20; our IP address is 192.168.89.102; sending through gateway 192.168.89.1
Filename 'renesas-v4h.txt'.
Load address: 0x58000000
Loading: *\b#
	 175.8 KiB/s
done
Bytes transferred = 720 (2d0 hex)
Using ethernet@e6800000 device
TFTP from server 192.168.88.20; our IP address is 192.168.89.102; sending through gateway 192.168.89.1
Filename 'linux/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dtb'.
Load address: 0x48000000
Loading: *\b#####
	 9.1 MiB/s
done
Bytes transferred = 66629 (10445 hex)
Using ethernet@e6800000 device
TFTP from server 192.168.88.20; our IP address is 192.168.89.102; sending through gateway 192.168.89.1
Filename 'linux/arch/arm64/boot/Image'.
Load address: 0x48080000
Loading: *\b#################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 #################################################################
	 ####################################################
	 9.1 MiB/s
done
Bytes transferred = 36065792 (2265200 hex)
Moving Image from 0x48080000 to 0x48200000, end=4b470000
## Flattened Device Tree blob at 48000000
   Booting using the fdt blob at 0x48000000
   Loading Device Tree to 0000000057efd000, end 0000000057ffffff ... OK

Starting kernel ...

Booting Linux on physical CPU 0x0000000000 [0x414fd0b1]
Linux version 6.16.0-rc1+ (tomba@deskari) (aarch64-linux-gnu-gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, GNU ld (GNU Binutils for Ubuntu) 2.42) #6 SMP PREEMPT Fri Jun 13 13:25:57 EEST 2025
Machine model: Renesas White Hawk CPU and Breakout boards based on r8a779g0
efi: UEFI not found.
earlycon: hscif0 at MMIO 0x00000000e6540000 (options '921600n8')
printk: legacy bootconsole [hscif0] enabled
OF: reserved mem: Reserved memory: No reserved-memory node in the DT
NUMA: Faking a node at [mem 0x0000000048000000-0x00000006ffffffff]
NODE_DATA(0) allocated [mem 0x6fefd3940-0x6fefd657f]
Zone ranges:
  DMA      [mem 0x0000000048000000-0x00000000ffffffff]
  DMA32    empty
  Normal   [mem 0x0000000100000000-0x00000006ffffffff]
Movable zone start for each node
Early memory node ranges
  node   0: [mem 0x0000000048000000-0x00000000bfffffff]
  node   0: [mem 0x0000000480000000-0x00000004ffffffff]
  node   0: [mem 0x0000000600000000-0x00000006ffffffff]
Initmem setup node 0 [mem 0x0000000048000000-0x00000006ffffffff]
cma: Reserved 256 MiB at 0x00000000b0000000
psci: probing for conduit method from DT.
psci: PSCIv1.1 detected in firmware.
psci: Using standard PSCI v0.2 function IDs
psci: MIGRATE_INFO_TYPE not supported.
psci: SMC Calling Convention v1.2
percpu: Embedded 33 pages/cpu s98192 r8192 d28784 u135168
Detected PIPT I-cache on CPU0
CPU features: detected: GIC system register CPU interface
CPU features: detected: Spectre-v4
CPU features: detected: Spectre-BHB
CPU features: detected: SSBS not fully self-synchronizing
alternatives: applying boot alternatives
Kernel command line: console=ttySC0,921600n8 root=/dev/nfs rw nfsroot=/home/tomba/nfs/rootfs64,v3,tcp ip=::::buildroot:eth0:dhcp cma=256M no_console_suspend earlycon
printk: log buffer data + meta data: 131072 + 458752 = 589824 bytes
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, linear)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, linear)
software IO TLB: area num 4.
software IO TLB: mapped [mem 0x00000000ac000000-0x00000000b0000000] (64MB)
Fallback order for Node 0: 0 
Built 1 zonelists, mobility grouping on.  Total pages: 2064384
Policy zone: Normal
mem auto-init: stack:all(zero), heap alloc:off, heap free:off
stackdepot: allocating hash table via alloc_large_system_hash
stackdepot hash table entries: 524288 (order: 11, 8388608 bytes, linear)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
ftrace: allocating 52768 entries in 208 pages
ftrace: allocated 208 pages with 3 groups
Running RCU self tests
Running RCU synchronous self tests
rcu: Preemptible hierarchical RCU implementation.
rcu: 	RCU event tracing is enabled.
rcu: 	RCU lockdep checking is enabled.
rcu: 	RCU restricting CPUs from NR_CPUS=512 to nr_cpu_ids=4.
	Trampoline variant of Tasks RCU enabled.
	Rude variant of Tasks RCU enabled.
	Tracing variant of Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
Running RCU synchronous self tests
RCU Tasks: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
RCU Tasks Rude: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
RCU Tasks Trace: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
GICv3: 960 SPIs implemented
GICv3: 0 Extended SPIs implemented
Root IRQ handler: gic_handle_irq
GICv3: GICv3 features: 16 PPIs
GICv3: GICD_CTRL.DS=0, SCR_EL3.FIQ=0
GICv3: CPU0: found redistributor 0 region 0:0x00000000f1060000
ITS: No ITS available, not enabling LPIs
rcu: srcu_init: Setting srcu_struct sizes based on contention.
arch_timer: cp15 timer(s) running at 16.66MHz (virt).
clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x3d805247c, max_idle_ns: 440795202618 ns
sched_clock: 56 bits at 17MHz, resolution 60ns, wraps every 2199023255545ns
Console: colour dummy device 80x25
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:  8
... MAX_LOCK_DEPTH:          48
... MAX_LOCKDEP_KEYS:        8192
... CLASSHASH_SIZE:          4096
... MAX_LOCKDEP_ENTRIES:     32768
... MAX_LOCKDEP_CHAINS:      65536
... CHAINHASH_SIZE:          32768
 memory used by lock dependency info: 6429 kB
 memory used for stack traces: 4224 kB
 per task-struct memory footprint: 1920 bytes
Calibrating delay loop (skipped), value calculated using timer frequency.. 33.33 BogoMIPS (lpj=66666)
pid_max: default: 32768 minimum: 301
LSM: initializing lsm=capability
Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
Running RCU synchronous self tests
Running RCU synchronous self tests
rcu: Hierarchical SRCU implementation.
rcu: 	Max phase no-delay instances is 1000.
Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode level
Detected Renesas R-Car Gen4 r8a779g0 ES1.0
EFI services will not be available.
smp: Bringing up secondary CPUs ...
Detected PIPT I-cache on CPU1
GICv3: CPU1: found redistributor 100 region 0:0x00000000f1080000
CPU1: Booted secondary processor 0x0000000100 [0x414fd0b1]
Detected PIPT I-cache on CPU2
GICv3: CPU2: found redistributor 10000 region 0:0x00000000f10a0000
CPU2: Booted secondary processor 0x0000010000 [0x414fd0b1]
Detected PIPT I-cache on CPU3
GICv3: CPU3: found redistributor 10100 region 0:0x00000000f10c0000
CPU3: Booted secondary processor 0x0000010100 [0x414fd0b1]
smp: Brought up 1 node, 4 CPUs
SMP: Total of 4 processors activated.
CPU: All CPU(s) started at EL1
CPU features: detected: 32-bit EL0 Support
CPU features: detected: Data cache clean to the PoU not required for I/D coherence
CPU features: detected: Common not Private translations
CPU features: detected: CRC32 instructions
CPU features: detected: RCpc load-acquire (LDAPR)
CPU features: detected: LSE atomic instructions
CPU features: detected: Privileged Access Never
CPU features: detected: PMUv3
CPU features: detected: RAS Extension Support
CPU features: detected: Speculative Store Bypassing Safe (SSBS)
alternatives: applying system-wide alternatives
CPU features: detected: Hardware dirty bit management on CPU0-3
Memory: 7702560K/8257536K available (17088K kernel code, 3092K rwdata, 7520K rodata, 7360K init, 16335K bss, 284640K reserved, 262144K cma-reserved)
devtmpfs: initialized
Running RCU synchronous self tests
Running RCU synchronous self tests
Running RCU Tasks wait API self tests
Running RCU Tasks Rude wait API self tests
Running RCU Tasks Trace wait API self tests
DMA-API: preallocated 65536 debug entries
DMA-API: debugging enabled by kernel config
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
posixtimers hash table entries: 2048 (order: 5, 147456 bytes, linear)
futex hash table entries: 1024 (131072 bytes on 1 NUMA nodes, total 128 KiB, linear).
19856 pages in range for non-PLT usage
511376 pages in range for PLT usage
pinctrl core: initialized pinctrl subsystem
DMI not present or invalid.
NET: Registered PF_NETLINK/PF_ROUTE protocol family
DMA: preallocated 1024 KiB GFP_KERNEL pool for atomic allocations
DMA: preallocated 1024 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
DMA: preallocated 1024 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
audit: initializing netlink subsys (disabled)
audit: type=2000 audit(0.164:1): state=initialized audit_enabled=0 res=1
thermal_sys: Registered thermal governor 'step_wise'
thermal_sys: Registered thermal governor 'power_allocator'
cpuidle: using governor menu
Callback from call_rcu_tasks_trace() invoked.
hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
ASID allocator initialised with 65536 entries
Serial: AMBA PL011 UART driver
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/video@e6ef0000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef1000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef2000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef3000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef4000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef5000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef6000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef7000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef8000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef9000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efa000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efb000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efc000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efd000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efe000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6eff000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/interrupt-controller@f1000000: Fixed dependency cycle(s) with /soc/interrupt-controller@f1000000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@49
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@4b
/soc/display@feb00000: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef7000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef6000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef5000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef4000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef3000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef2000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef1000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef0000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6eff000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efe000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efd000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efc000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efb000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efa000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef9000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef8000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/display@feb00000
/soc/pinctrl@e6050000: Fixed dependency cycle(s) with /soc/pinctrl@e6050000/scif_clk
sh-pfc e6050000.pinctrl: r8a779g0_pfc support registered
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/video@e6ef0000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef1000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef2000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef3000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef4000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef5000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef6000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef7000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef8000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef9000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efa000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efb000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efc000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efd000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efe000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6eff000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@49
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@4b
/soc/display@feb00000: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef7000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef6000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef5000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef4000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef3000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef2000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef1000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/video@e6ef0000: Fixed dependency cycle(s) with /soc/isp@fed00000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef7000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef6000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef5000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef4000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef3000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef2000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef1000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/video@e6ef0000
/soc/isp@fed00000: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6eff000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efe000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efd000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efc000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efb000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6efa000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef9000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/video@e6ef8000: Fixed dependency cycle(s) with /soc/isp@fed20000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6eff000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efe000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efd000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efc000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efb000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6efa000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef9000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/video@e6ef8000
/soc/isp@fed20000: Fixed dependency cycle(s) with /soc/csi2@fe540000
/soc/display@feb00000: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/display@feb00000
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /mini-dp-con
/mini-dp-con: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
HugeTLB: allocation took 0ms with hugepage_allocation_threads=1
HugeTLB: allocation took 0ms with hugepage_allocation_threads=1
HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 1.00 GiB page
HugeTLB: registered 32.0 MiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 32.0 MiB page
Callback from call_rcu_tasks() invoked.
HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 2.00 MiB page
HugeTLB: registered 64.0 KiB page size, pre-allocated 0 pages
HugeTLB: 0 KiB vmemmap can be freed for a 64.0 KiB page
ACPI: Interpreter disabled.
iommu: Default domain type: Translated
iommu: DMA domain TLB invalidation policy: strict mode
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
scmi_core: SCMI protocol bus registered
FPGA manager framework
Advanced Linux Sound Architecture Driver Initialized.
vgaarb: loaded
clocksource: Switched to clocksource arch_sys_counter
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
pnp: PnP ACPI: disabled
NET: Registered PF_INET protocol family
IP idents hash table entries: 131072 (order: 8, 1048576 bytes, linear)
tcp_listen_portaddr_hash hash table entries: 4096 (order: 6, 294912 bytes, linear)
Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
TCP established hash table entries: 65536 (order: 7, 524288 bytes, linear)
TCP bind hash table entries: 65536 (order: 11, 9437184 bytes, vmalloc hugepage)
TCP: Hash tables configured (established 65536 bind 65536)
UDP hash table entries: 4096 (order: 8, 1048576 bytes, linear)
UDP-Lite hash table entries: 4096 (order: 8, 1048576 bytes, linear)
NET: Registered PF_UNIX/PF_LOCAL protocol family
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp-with-tls transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
PCI: CLS 0 bytes, default 64
Initialise system trusted keyrings
workingset: timestamp_bits=42 max_order=21 bucket_order=0
squashfs: version 4.0 (2009/01/31) Phillip Lougher
NFS: Registering the id_resolver key type
Key type id_resolver registered
Key type id_legacy registered
nfs4filelayout_init: NFSv4 File Layout Driver Registering...
nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
Key type asymmetric registered
Asymmetric key parser 'x509' registered
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 245)
io scheduler mq-deadline registered
io scheduler kyber registered
io scheduler bfq registered
gpio_rcar e6050180.gpio: driving 19 GPIOs
gpio_rcar e6050980.gpio: driving 29 GPIOs
gpio_rcar e6058180.gpio: driving 20 GPIOs
gpio_rcar e6058980.gpio: driving 30 GPIOs
gpio_rcar e6060180.gpio: driving 25 GPIOs
gpio_rcar e6060980.gpio: driving 21 GPIOs
gpio_rcar e6061180.gpio: driving 21 GPIOs
gpio_rcar e6061980.gpio: driving 21 GPIOs
gpio_rcar e6068180.gpio: driving 14 GPIOs
ledtrig-cpu: registered to indicate activity on CPUs
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
SuperH (H)SCI(F) driver initialized
e6540000.serial: ttySC0 at MMIO 0xe6540000 (irq = 23, base_baud = 0) is a hscif
printk: legacy console [ttySC0] enabled
printk: legacy console [ttySC0] enabled
printk: legacy bootconsole [hscif0] disabled
printk: legacy bootconsole [hscif0] disabled
ipmmu-vmsa eefc0000.iommu: IPMMU context 0 is reserved
loop: module loaded
tun: Universal TUN/TAP device driver, 1.6
thunder_xcv, ver 1.0
thunder_bgx, ver 1.0
nicpf, ver 1.0
hns3: Hisilicon Ethernet Network Driver for Hip08 Family - version
hns3: Copyright (c) 2017 Huawei Corporation.
hclge is initializing
e1000: Intel(R) PRO/1000 Network Driver
e1000: Copyright (c) 1999-2006 Intel Corporation.
e1000e: Intel(R) PRO/1000 Network Driver
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
igb: Intel(R) Gigabit Ethernet Network Driver
igb: Copyright (c) 2007-2014 Intel Corporation.
igbvf: Intel(R) Gigabit Virtual Function Network Driver
igbvf: Copyright (c) 2009 - 2012 Intel Corporation.
sky2: driver version 1.30
VFIO - User Level meta-driver version: 0.3
i2c_dev: i2c /dev entries driver
pca953x 0-0020: supply vcc not found, using dummy regulator
pca953x 0-0020: using no AI
pca953x 0-0021: supply vcc not found, using dummy regulator
pca953x 0-0021: using no AI
pca953x 0-0022: supply vcc not found, using dummy regulator
pca953x 0-0022: using no AI
i2c-rcar e6500000.i2c: probed
/mini-dp-con: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
/soc/dsi-encoder@fed80000: Fixed dependency cycle(s) with /soc/i2c@e6508000/bridge@2c
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /mini-dp-con
/soc/i2c@e6508000/bridge@2c: Fixed dependency cycle(s) with /soc/dsi-encoder@fed80000
/soc/csi2@fe500000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@49
/soc/i2c@e6508000/gmsl-deserializer@49: Fixed dependency cycle(s) with /soc/csi2@fe500000
/soc/csi2@fe540000: Fixed dependency cycle(s) with /soc/i2c@e6508000/gmsl-deserializer@4b
/soc/i2c@e6508000/gmsl-deserializer@4b: Fixed dependency cycle(s) with /soc/csi2@fe540000
i2c-rcar e6508000.i2c: probed
rcar_gen3_thermal e6198000.thermal: No calibration values fused, fallback to driver values
rcar_gen3_thermal e6198000.thermal: Sensor 0: Loaded
rcar_gen3_thermal e6198000.thermal: Sensor 1: Loaded
rcar_gen3_thermal e6198000.thermal: Sensor 2: Loaded
rcar_gen3_thermal e6198000.thermal: Sensor 3: Loaded
cpufreq: cpufreq_policy_online: CPU0: Running at unlisted initial frequency: 1699999 kHz, changing to: 1700000 kHz
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
Synopsys Designware Multimedia Card Interface Driver
sdhci-pltfm: SDHCI platform and OF driver helper
SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
hw perfevents: enabled with armv8_cortex_a76 PMU driver, 7 (0,8000003f) counters available
watchdog: NMI not fully supported
watchdog: Hard watchdog permanently disabled
NET: Registered PF_PACKET protocol family
Key type dns_resolver registered
registered taskstats version 1
Loading compiled-in X.509 certificates
Demotion targets for Node 0: null
kmemleak: Kernel memory leak detector initialized (mem pool available: 15793)
kmemleak: Automatic memory scanning thread started
renesas_irqc e61c0000.interrupt-controller: driving 6 irqs
platform ee140000.mmc: Adding to iommu group 0
platform ee140000.mmc: Using IPMMU context 1
ravb e6800000.ethernet eth0: Base address at 0xe6800000, 2e:09:0a:06:da:8a, IRQ 35.
ravb e6810000.ethernet: no valid MAC address supplied, using a random one
ravb e6810000.ethernet eth1: Base address at 0xe6810000, 3e:00:03:62:9f:b8, IRQ 42.
ravb e6820000.ethernet: no valid MAC address supplied, using a random one
ravb e6820000.ethernet eth2: Base address at 0xe6820000, 9a:ef:77:88:1e:73, IRQ 49.
input: keys as /devices/platform/keys/input/input0
renesas_sdhi_internal_dmac ee140000.mmc: mmc0 base at 0x00000000ee140000, max clock rate 200 MHz
mmc0: new HS400 MMC card at address 0001
mmcblk0: mmc0:0001 G1M15L 29.6 GiB
Micrel KSZ9031 Gigabit PHY e6800000.ethernet-ffffffff:00: attached PHY driver (mii_bus:phy_addr=e6800000.ethernet-ffffffff:00, irq=41)
mmcblk0boot0: mmc0:0001 G1M15L 31.5 MiB
mmcblk0boot1: mmc0:0001 G1M15L 31.5 MiB
mmcblk0rpmb: mmc0:0001 G1M15L 4.00 MiB, chardev (240:0)
ravb e6800000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
Sending DHCP requests ..., OK
IP-Config: Got DHCP answer from 192.168.89.1, my address is 192.168.89.102
IP-Config: Complete:
     device=eth0, hwaddr=2e:09:0a:06:da:8a, ipaddr=192.168.89.102, mask=255.255.255.0, gw=192.168.89.1
     host=buildroot, domain=lab, nis-domain=(none)
     bootserver=192.168.88.20, rootserver=192.168.88.20, rootpath=
     nameserver0=192.168.89.1
     ntpserver0=192.168.89.1
clk: Disabling unused clocks
PM: genpd: Disabling unused power domains
ALSA device list:
  No soundcards found.
VFS: Mounted root (nfs filesystem) on device 0:23.
devtmpfs: mounted
Freeing unused kernel memory: 7360K
Run /sbin/init as init process
random: crng init done
Seeding 256 bits and crediting
Saving 256 bits of creditable seed for next boot
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Populating /dev using udev: udevd[160]: starting version 3.2.14
udevd[161]: starting eudev-3.2.14
done
Starting system message bus: done
Starting network: ip: RTNETLINK answers: File exists
FAIL
Starting crond: OK
Starting sshd: OK
Mounting root home
Mounting work

Welcome to Buildroot
buildroot login: 

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Ulf Hansson]

On Fri, 13 Jun 2025 at 12:33, Tomi Valkeinen
<tomi.valkeinen@ideasonboard.com> wrote:
>
> Hi Ulf,
>
> On 23/05/2025 16:39, Ulf Hansson wrote:
> > Changes in v2:
> >       - Well, quite a lot as I discovered various problems when doing
> >       additional testing of corner-case. I suggest re-review from scratch,
> >       even if I decided to keep some reviewed-by tags.
> >       - Added patches to allow some drivers that needs to align or opt-out
> >       from the new common behaviour in genpd.
> >
> > If a PM domain (genpd) is powered-on during boot, there is probably a good
> > reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> > powered-off before all of its consumer devices have been probed. This series
> > intends to fix this problem.
> >
> > We have been discussing these issues at LKML and at various Linux-conferences
> > in the past. I have therefore tried to include the people I can recall being
> > involved, but I may have forgotten some (my apologies), feel free to loop them
> > in.
> >
> > I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> > Let me know if you want me to share this code too.
> >
> > Please help review and test!
>
> I tested this Renesas white-hawk board, and it hangs at boot. With
> earlycon, I captured with/without boot logs, attached.
>
> The hang case doesn't look very healthy with all these: "kobject:
> '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is
> being called."

Tomi, thanks a lot for helping out with testing!

rcar_gen4_sysc_pd_init() calls pm_genpd_init() and
of_genpd_add_provider_onecell().

rcar_gen4_sysc_pd_init() is an early_initcall, which I guess is the
reason for these problems, as the genpd_provider_bus has not been
registered that early (it's done at core_initcall)

Do you think it would be possible to move rcar_gen4_sysc_pd_init() to
a postcore/arch_initcall?

Kind regards
Uffe

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Ulf Hansson]

On Thu, 19 Jun 2025 at 13:40, Ulf Hansson <ulf.hansson@linaro.org> wrote:
>
> On Fri, 13 Jun 2025 at 12:33, Tomi Valkeinen
> <tomi.valkeinen@ideasonboard.com> wrote:
> >
> > Hi Ulf,
> >
> > On 23/05/2025 16:39, Ulf Hansson wrote:
> > > Changes in v2:
> > >       - Well, quite a lot as I discovered various problems when doing
> > >       additional testing of corner-case. I suggest re-review from scratch,
> > >       even if I decided to keep some reviewed-by tags.
> > >       - Added patches to allow some drivers that needs to align or opt-out
> > >       from the new common behaviour in genpd.
> > >
> > > If a PM domain (genpd) is powered-on during boot, there is probably a good
> > > reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> > > powered-off before all of its consumer devices have been probed. This series
> > > intends to fix this problem.
> > >
> > > We have been discussing these issues at LKML and at various Linux-conferences
> > > in the past. I have therefore tried to include the people I can recall being
> > > involved, but I may have forgotten some (my apologies), feel free to loop them
> > > in.
> > >
> > > I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> > > Let me know if you want me to share this code too.
> > >
> > > Please help review and test!
> >
> > I tested this Renesas white-hawk board, and it hangs at boot. With
> > earlycon, I captured with/without boot logs, attached.
> >
> > The hang case doesn't look very healthy with all these: "kobject:
> > '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is
> > being called."
>
> Tomi, thanks a lot for helping out with testing!
>
> rcar_gen4_sysc_pd_init() calls pm_genpd_init() and
> of_genpd_add_provider_onecell().
>
> rcar_gen4_sysc_pd_init() is an early_initcall, which I guess is the
> reason for these problems, as the genpd_provider_bus has not been
> registered that early (it's done at core_initcall)
>
> Do you think it would be possible to move rcar_gen4_sysc_pd_init() to
> a postcore/arch_initcall?

I did some investigation around this and found that both
drivers/pmdomain/renesas/rcar-gen4-sysc.c and
drivers/pmdomain/renesas/rcar-sysc.c are registering their genpd
providers at the early_initcall() level.

I was trying to find (by browsing renesas DTSes and looking into
drivers) if there is any consumers that actually relies on this, but
so far the earliest consumer I have found is the
drivers/irqchip/irq-renesas-irqc.c, but that's at postcore_initcall().
Of course, it's difficult to say if my analysis is complete as there
are a lot of platform variants and I didn't check them all.

Maybe we should just give it a try and move both two drivers above to
postcore_initcall and see if it works (assuming the irq-renesas-irqc
supports -EPROBE_DEFER correctly too).

If this doesn't work, I think we need to find a way to allow deferring
the call to device_add() in of_genpd_provider_add*() for genpd
provider's devices.

Kind regards
Uffe

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Geert Uytterhoeven]

Hi Ulf,

On Mon, 23 Jun 2025 at 16:21, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> On Thu, 19 Jun 2025 at 13:40, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > On Fri, 13 Jun 2025 at 12:33, Tomi Valkeinen
> > <tomi.valkeinen@ideasonboard.com> wrote:
> > > On 23/05/2025 16:39, Ulf Hansson wrote:
> > > > Changes in v2:
> > > >       - Well, quite a lot as I discovered various problems when doing
> > > >       additional testing of corner-case. I suggest re-review from scratch,
> > > >       even if I decided to keep some reviewed-by tags.
> > > >       - Added patches to allow some drivers that needs to align or opt-out
> > > >       from the new common behaviour in genpd.
> > > >
> > > > If a PM domain (genpd) is powered-on during boot, there is probably a good
> > > > reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> > > > powered-off before all of its consumer devices have been probed. This series
> > > > intends to fix this problem.
> > > >
> > > > We have been discussing these issues at LKML and at various Linux-conferences
> > > > in the past. I have therefore tried to include the people I can recall being
> > > > involved, but I may have forgotten some (my apologies), feel free to loop them
> > > > in.
> > > >
> > > > I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> > > > Let me know if you want me to share this code too.
> > > >
> > > > Please help review and test!
> > >
> > > I tested this Renesas white-hawk board, and it hangs at boot. With
> > > earlycon, I captured with/without boot logs, attached.
> > >
> > > The hang case doesn't look very healthy with all these: "kobject:
> > > '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is
> > > being called."
> >
> > Tomi, thanks a lot for helping out with testing!
> >
> > rcar_gen4_sysc_pd_init() calls pm_genpd_init() and
> > of_genpd_add_provider_onecell().
> >
> > rcar_gen4_sysc_pd_init() is an early_initcall, which I guess is the
> > reason for these problems, as the genpd_provider_bus has not been
> > registered that early (it's done at core_initcall)
> >
> > Do you think it would be possible to move rcar_gen4_sysc_pd_init() to
> > a postcore/arch_initcall?
>
> I did some investigation around this and found that both
> drivers/pmdomain/renesas/rcar-gen4-sysc.c and
> drivers/pmdomain/renesas/rcar-sysc.c are registering their genpd
> providers at the early_initcall() level.
>
> I was trying to find (by browsing renesas DTSes and looking into
> drivers) if there is any consumers that actually relies on this, but
> so far the earliest consumer I have found is the
> drivers/irqchip/irq-renesas-irqc.c, but that's at postcore_initcall().
> Of course, it's difficult to say if my analysis is complete as there
> are a lot of platform variants and I didn't check them all.
>
> Maybe we should just give it a try and move both two drivers above to
> postcore_initcall and see if it works (assuming the irq-renesas-irqc
> supports -EPROBE_DEFER correctly too).
>
> If this doesn't work, I think we need to find a way to allow deferring
> the call to device_add() in of_genpd_provider_add*() for genpd
> provider's devices.

Commit dcc09fd143bb97c2 ("soc: renesas: rcar-sysc: Add DT support for
SYSC PM domains") explains:

   "Initialization is done from an early_initcall(), to make sure the PM
    Domains are initialized before secondary CPU bringup."

but that matters only for arm32 systems (R-Car Gen1 and Gen2).
Arm64 systems (R-Car Gen3 and Gen4) use PSCI for CPU PM Domain control.

While changing rcar-sysc.c to use a postcore_initcall indeed moves PM
Domain initialization after secondary CPU bringup, the second CPU core
on R-Car M2-W is still brought up fine.

For R-Car H1, there is a regression:

    smp: Bringing up secondary CPUs ...
    CPU1: failed to boot: -19
    CPU2: failed to boot: -19
    CPU3: failed to boot: -19
    smp: Brought up 1 node, 1 CPU
    SMP: Total of 1 processors activated (500.00 BogoMIPS).

CPU bringup/teardown in userspace using
/sys/devices/system/cpu/cpu*/online still works.
R-Car H1 was never converted to use "enable-method" in DT, and relies
on calling into the rcar-sysc driver directly (see [1]).  However,
that does not use any actual calls into the genpd core, so probably it
can be made to work by splitting rcar_sysc_pd_init() in two parts: an
early_initcall() that allocates all domain structures and populates the
internal hierarchy, and a postcore_initcall() that registers everything
with the genpd core.

As expected, there is no impact on R-Car H3 ES2.0.
I will test on R-Car V4M tomorrow, but expect no issues.

FTR, drivers/pmdomain/renesas/rmobile-sysc.c uses core_initcall().
Changing that to postcore_initcall does not seem to make a difference
(on R-Mobile A1).

[1] https://elixir.bootlin.com/linux/v6.15.3/source/drivers/pmdomain/renesas/rcar-sysc.c#L439

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Geert Uytterhoeven]

On Mon, 23 Jun 2025 at 17:06, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Mon, 23 Jun 2025 at 16:21, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > On Thu, 19 Jun 2025 at 13:40, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > > rcar_gen4_sysc_pd_init() is an early_initcall, which I guess is the
> > > reason for these problems, as the genpd_provider_bus has not been
> > > registered that early (it's done at core_initcall)
> > >
> > > Do you think it would be possible to move rcar_gen4_sysc_pd_init() to
> > > a postcore/arch_initcall?
> >
> > I did some investigation around this and found that both
> > drivers/pmdomain/renesas/rcar-gen4-sysc.c and
> > drivers/pmdomain/renesas/rcar-sysc.c are registering their genpd
> > providers at the early_initcall() level.
> >
> > I was trying to find (by browsing renesas DTSes and looking into
> > drivers) if there is any consumers that actually relies on this, but
> > so far the earliest consumer I have found is the
> > drivers/irqchip/irq-renesas-irqc.c, but that's at postcore_initcall().
> > Of course, it's difficult to say if my analysis is complete as there
> > are a lot of platform variants and I didn't check them all.
> >
> > Maybe we should just give it a try and move both two drivers above to
> > postcore_initcall and see if it works (assuming the irq-renesas-irqc
> > supports -EPROBE_DEFER correctly too).
> >
> > If this doesn't work, I think we need to find a way to allow deferring
> > the call to device_add() in of_genpd_provider_add*() for genpd
> > provider's devices.
>
> Commit dcc09fd143bb97c2 ("soc: renesas: rcar-sysc: Add DT support for
> SYSC PM domains") explains:
>
>    "Initialization is done from an early_initcall(), to make sure the PM
>     Domains are initialized before secondary CPU bringup."
>
> but that matters only for arm32 systems (R-Car Gen1 and Gen2).
> Arm64 systems (R-Car Gen3 and Gen4) use PSCI for CPU PM Domain control.

[...]

> As expected, there is no impact on R-Car H3 ES2.0.
> I will test on R-Car V4M tomorrow, but expect no issues.

R-Car V4M is fine, too.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Ulf Hansson]

On Mon, 23 Jun 2025 at 17:06, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Hi Ulf,
>
> On Mon, 23 Jun 2025 at 16:21, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > On Thu, 19 Jun 2025 at 13:40, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > > On Fri, 13 Jun 2025 at 12:33, Tomi Valkeinen
> > > <tomi.valkeinen@ideasonboard.com> wrote:
> > > > On 23/05/2025 16:39, Ulf Hansson wrote:
> > > > > Changes in v2:
> > > > >       - Well, quite a lot as I discovered various problems when doing
> > > > >       additional testing of corner-case. I suggest re-review from scratch,
> > > > >       even if I decided to keep some reviewed-by tags.
> > > > >       - Added patches to allow some drivers that needs to align or opt-out
> > > > >       from the new common behaviour in genpd.
> > > > >
> > > > > If a PM domain (genpd) is powered-on during boot, there is probably a good
> > > > > reason for it. Therefore it's known to be a bad idea to allow such genpd to be
> > > > > powered-off before all of its consumer devices have been probed. This series
> > > > > intends to fix this problem.
> > > > >
> > > > > We have been discussing these issues at LKML and at various Linux-conferences
> > > > > in the past. I have therefore tried to include the people I can recall being
> > > > > involved, but I may have forgotten some (my apologies), feel free to loop them
> > > > > in.
> > > > >
> > > > > I have tested this with QEMU with a bunch of local test-drivers and DT nodes.
> > > > > Let me know if you want me to share this code too.
> > > > >
> > > > > Please help review and test!
> > > >
> > > > I tested this Renesas white-hawk board, and it hangs at boot. With
> > > > earlycon, I captured with/without boot logs, attached.
> > > >
> > > > The hang case doesn't look very healthy with all these: "kobject:
> > > > '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is
> > > > being called."
> > >
> > > Tomi, thanks a lot for helping out with testing!
> > >
> > > rcar_gen4_sysc_pd_init() calls pm_genpd_init() and
> > > of_genpd_add_provider_onecell().
> > >
> > > rcar_gen4_sysc_pd_init() is an early_initcall, which I guess is the
> > > reason for these problems, as the genpd_provider_bus has not been
> > > registered that early (it's done at core_initcall)
> > >
> > > Do you think it would be possible to move rcar_gen4_sysc_pd_init() to
> > > a postcore/arch_initcall?
> >
> > I did some investigation around this and found that both
> > drivers/pmdomain/renesas/rcar-gen4-sysc.c and
> > drivers/pmdomain/renesas/rcar-sysc.c are registering their genpd
> > providers at the early_initcall() level.
> >
> > I was trying to find (by browsing renesas DTSes and looking into
> > drivers) if there is any consumers that actually relies on this, but
> > so far the earliest consumer I have found is the
> > drivers/irqchip/irq-renesas-irqc.c, but that's at postcore_initcall().
> > Of course, it's difficult to say if my analysis is complete as there
> > are a lot of platform variants and I didn't check them all.
> >
> > Maybe we should just give it a try and move both two drivers above to
> > postcore_initcall and see if it works (assuming the irq-renesas-irqc
> > supports -EPROBE_DEFER correctly too).
> >
> > If this doesn't work, I think we need to find a way to allow deferring
> > the call to device_add() in of_genpd_provider_add*() for genpd
> > provider's devices.
>
> Commit dcc09fd143bb97c2 ("soc: renesas: rcar-sysc: Add DT support for
> SYSC PM domains") explains:
>
>    "Initialization is done from an early_initcall(), to make sure the PM
>     Domains are initialized before secondary CPU bringup."
>
> but that matters only for arm32 systems (R-Car Gen1 and Gen2).
> Arm64 systems (R-Car Gen3 and Gen4) use PSCI for CPU PM Domain control.

Geert, thanks a lot for providing these details and helping out, much
appreciated!

>
> While changing rcar-sysc.c to use a postcore_initcall indeed moves PM
> Domain initialization after secondary CPU bringup, the second CPU core
> on R-Car M2-W is still brought up fine.
>
> For R-Car H1, there is a regression:
>
>     smp: Bringing up secondary CPUs ...
>     CPU1: failed to boot: -19
>     CPU2: failed to boot: -19
>     CPU3: failed to boot: -19
>     smp: Brought up 1 node, 1 CPU
>     SMP: Total of 1 processors activated (500.00 BogoMIPS).
>
> CPU bringup/teardown in userspace using
> /sys/devices/system/cpu/cpu*/online still works.
> R-Car H1 was never converted to use "enable-method" in DT, and relies
> on calling into the rcar-sysc driver directly (see [1]).  However,
> that does not use any actual calls into the genpd core, so probably it
> can be made to work by splitting rcar_sysc_pd_init() in two parts: an
> early_initcall() that allocates all domain structures and populates the
> internal hierarchy, and a postcore_initcall() that registers everything
> with the genpd core.

Yes, that seems like a viable option.

Unless you prefer to have a stab at it, I intend to look into it and
make the patch(es) part of a new version of the $subject series. Of
course I am still relying on your help with testing/review.

>
> As expected, there is no impact on R-Car H3 ES2.0.
> I will test on R-Car V4M tomorrow, but expect no issues.
>
> FTR, drivers/pmdomain/renesas/rmobile-sysc.c uses core_initcall().
> Changing that to postcore_initcall does not seem to make a difference
> (on R-Mobile A1).

Okay, it sure looks like we should be able to take care of this
problem for the Renesas platforms. That's great!

That said, it seems like we should also add some internal check in
genpd to see whether the genpd_provider_bus has been registered,
before we try to add devices to it. Then, perhaps log a warning and
return -EPROBE_DEFER if we hit  that case.

>
> [1] https://elixir.bootlin.com/linux/v6.15.3/source/drivers/pmdomain/renesas/rcar-sysc.c#L439
>

Kind regards
Uffe

Re: [PATCH v2 00/21] pmdomain: Add generic ->sync_state() support to genpd

[Geert Uytterhoeven]

Hi Ulf,

On Tue, 24 Jun 2025 at 17:30, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> On Mon, 23 Jun 2025 at 17:06, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Mon, 23 Jun 2025 at 16:21, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > > On Thu, 19 Jun 2025 at 13:40, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > > > Do you think it would be possible to move rcar_gen4_sysc_pd_init() to
> > > > a postcore/arch_initcall?
> > >
> > > I did some investigation around this and found that both
> > > drivers/pmdomain/renesas/rcar-gen4-sysc.c and
> > > drivers/pmdomain/renesas/rcar-sysc.c are registering their genpd
> > > providers at the early_initcall() level.
> > >
> > > I was trying to find (by browsing renesas DTSes and looking into
> > > drivers) if there is any consumers that actually relies on this, but
> > > so far the earliest consumer I have found is the
> > > drivers/irqchip/irq-renesas-irqc.c, but that's at postcore_initcall().
> > > Of course, it's difficult to say if my analysis is complete as there
> > > are a lot of platform variants and I didn't check them all.
> > >
> > > Maybe we should just give it a try and move both two drivers above to
> > > postcore_initcall and see if it works (assuming the irq-renesas-irqc
> > > supports -EPROBE_DEFER correctly too).
> > >
> > > If this doesn't work, I think we need to find a way to allow deferring
> > > the call to device_add() in of_genpd_provider_add*() for genpd
> > > provider's devices.
> >
> > Commit dcc09fd143bb97c2 ("soc: renesas: rcar-sysc: Add DT support for
> > SYSC PM domains") explains:
> >
> >    "Initialization is done from an early_initcall(), to make sure the PM
> >     Domains are initialized before secondary CPU bringup."
> >
> > but that matters only for arm32 systems (R-Car Gen1 and Gen2).
> > Arm64 systems (R-Car Gen3 and Gen4) use PSCI for CPU PM Domain control.
>
> Geert, thanks a lot for providing these details and helping out, much
> appreciated!
>
> > While changing rcar-sysc.c to use a postcore_initcall indeed moves PM
> > Domain initialization after secondary CPU bringup, the second CPU core
> > on R-Car M2-W is still brought up fine.

To rule out relying on anything being enabled by the bootloader,
I offlined the second CPU, and booted the kernel using kexec.
The second CPU still comes up fine.  Which is not that unsurprising,
as rcar-sysc.c ignores domains with the PD_CPU flag...

> > For R-Car H1, there is a regression:
> >
> >     smp: Bringing up secondary CPUs ...
> >     CPU1: failed to boot: -19
> >     CPU2: failed to boot: -19
> >     CPU3: failed to boot: -19
> >     smp: Brought up 1 node, 1 CPU
> >     SMP: Total of 1 processors activated (500.00 BogoMIPS).
> >
> > CPU bringup/teardown in userspace using
> > /sys/devices/system/cpu/cpu*/online still works.
> > R-Car H1 was never converted to use "enable-method" in DT, and relies
> > on calling into the rcar-sysc driver directly (see [1]).  However,
> > that does not use any actual calls into the genpd core, so probably it
> > can be made to work by splitting rcar_sysc_pd_init() in two parts: an
> > early_initcall() that allocates all domain structures and populates the
> > internal hierarchy, and a postcore_initcall() that registers everything
> > with the genpd core.
>
> Yes, that seems like a viable option.

... so it's just R-Car H1 that needs some code to run early.

> Unless you prefer to have a stab at it, I intend to look into it and
> make the patch(es) part of a new version of the $subject series. Of
> course I am still relying on your help with testing/review.

Sure, I will do testing and review.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 08/21] cpuidle: riscv-sbi: Opt-out from genpd's common ->sync_state() support

[patchwork-bot+linux-riscv]

Hello:

This series was applied to riscv/linux.git (fixes)
by Ulf Hansson <ulf.hansson@linaro.org>:

On Fri, 23 May 2025 15:40:05 +0200 you wrote:
> The riscv-sbi-domain implements its own specific ->sync_state() callback.
> Let's set the GENPD_FLAG_NO_SYNC_STATE to inform genpd about it.
> 
> Moreover, let's call of_genpd_sync_state() to make sure genpd tries to
> power off unused PM domains.
> 
> Cc: Anup Patel <anup@brainfault.org>
> Cc: linux-riscv@lists.infradead.org
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> 
> [...]

Here is the summary with links:
  - [v2,08/21] cpuidle: riscv-sbi: Opt-out from genpd's common ->sync_state() support
    https://git.kernel.org/riscv/c/ee766b017586
  - [v2,21/21] cpuidle: riscv-sbi: Drop redundant sync_state support
    https://git.kernel.org/riscv/c/eb34a0b5fee7

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html