* [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config()
@ 2022-07-04 12:07 Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
` (4 more replies)
0 siblings, 5 replies; 14+ messages in thread
From: Viresh Kumar @ 2022-07-04 12:07 UTC (permalink / raw)
To: Alim Akhtar, Alyssa Rosenzweig, Andy Gross, Bjorn Andersson,
Chanwoo Choi, Chen-Yu Tsai, Fabio Estevam, Ilia Lin,
Jernej Skrabec, Jonathan Hunter, Krzysztof Kozlowski,
Kyungmin Park, MyungJoo Ham, Nishanth Menon, NXP Linux Team,
Patrice Chotard, Pengutronix Kernel Team, Qiang Yu,
Rafael J. Wysocki, Rob Herring, Samuel Holland, Sascha Hauer,
Shawn Guo, Stephen Boyd, Steven Price, Thierry Reding,
Tomeu Vizoso, Viresh Kumar, Viresh Kumar, Yangtao Li
Cc: linux-pm, Vincent Guittot, Dmitry Osipenko, dri-devel,
Greg Kroah-Hartman, lima, linux-arm-kernel, linux-arm-msm,
linux-kernel, linux-samsung-soc, linux-sunxi, linux-tegra
Hello,
We have too many configuration specific APIs currently, six of them already,
like dev_pm_opp_set_regulators(). This makes it complex/messy for both the OPP
core and its users to manage. There is also code redundancy in these APIs, in
the way they add/manage the OPP table specific stuff.
This patch series is an attempt to simplify these interfaces by adding a new
interface, dev_pm_opp_set_config(), which is now used by all the existing ones.
This series also migrates few users to the new API, where multiple
configurations were required and rest are updated for API interface changes.
This is pushed here:
git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git opp/linux-next
This was earlier tested by various folks, I have tested it again on hikey board,
it will get further tested on linux-next in the coming days. Build test is
already done by Linaro's bot for enough platform though.
The entire patchset shall get merged via the OPP tree in 5.20-rc1, please do not
merge individual patches.
V2->V3:
- Merged two patchsets:
[PATCH V2 00/30] OPP: Add new configuration interface: dev_pm_opp_set_config()
[PATCH V2 0/5] OPP: Replace custom set_opp() with config_regulators()
- The existing APIs aren't removed anymore, but are made to use the new core API
to set various configurations (Greg KH).
- clk-names and regulator-names are NULL terminated arrays now (Greg KH).
- New interface added: dev_pm_opp_set_config_regulators().
V1->V2:
- dev_pm_opp_set_config() doesn't return the OPP table anymore, but a token
allocated with xa_alloc(). The same needs to be passed to clear-config API.
- Updated all users according to that as well.
- The clk_names interface is updated to allow multiple clocks.
- Converted few // comments to /* */.
- Added tags by few people.
- Dropped the last patch to rearrange stuff, not required anymore.
Thanks.
--
Viresh
Viresh Kumar (20):
OPP: Track if clock name is configured by platform
OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
OPP: Add dev_pm_opp_set_config() and friends
cpufreq: qcom-nvmem: Migrate to dev_pm_opp_set_config()
cpufreq: sti: Migrate to dev_pm_opp_set_config()
cpufreq: ti: Migrate to dev_pm_opp_set_config()
drm/lima: Migrate to dev_pm_opp_set_config()
soc/tegra: Add comment over devm_pm_opp_set_clkname()
soc/tegra: Migrate to dev_pm_opp_set_config()
OPP: Migrate set-regulators API to use set-config helpers
OPP: Migrate set-supported-hw API to use set-config helpers
OPP: Migrate set-clk-name API to use set-config helpers
OPP: Migrate set-opp-helper API to use set-config helpers
OPP: Migrate attach-genpd API to use set-config helpers
OPP: Migrate set-prop-name helper API to use set-config helpers
OPP: Add support for config_regulators() helper
OPP: Make _generic_set_opp_regulator() a config_regulators() interface
OPP: Add dev_pm_opp_get_supplies()
OPP: ti: Migrate to dev_pm_opp_set_config_regulators()
OPP: Remove custom OPP helper support
drivers/cpufreq/cpufreq-dt.c | 19 +-
drivers/cpufreq/imx-cpufreq-dt.c | 12 +-
drivers/cpufreq/qcom-cpufreq-nvmem.c | 109 +--
drivers/cpufreq/sti-cpufreq.c | 27 +-
drivers/cpufreq/sun50i-cpufreq-nvmem.c | 31 +-
drivers/cpufreq/tegra20-cpufreq.c | 12 +-
drivers/cpufreq/ti-cpufreq.c | 42 +-
drivers/devfreq/exynos-bus.c | 21 +-
drivers/gpu/drm/lima/lima_devfreq.c | 12 +-
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 4 +-
drivers/memory/tegra/tegra124-emc.c | 11 +-
drivers/opp/core.c | 821 +++++++++-----------
drivers/opp/opp.h | 32 +-
drivers/opp/ti-opp-supply.c | 77 +-
drivers/soc/tegra/common.c | 49 +-
drivers/soc/tegra/pmc.c | 4 +-
include/linux/pm_opp.h | 295 ++++---
17 files changed, 750 insertions(+), 828 deletions(-)
--
2.31.1.272.g89b43f80a514
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-04 12:07 [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config() Viresh Kumar
@ 2022-07-04 12:07 ` Viresh Kumar
2022-07-04 14:35 ` Steven Price
` (2 more replies)
2022-07-04 12:07 ` [PATCH V3 05/20] cpufreq: sti: Migrate to dev_pm_opp_set_config() Viresh Kumar
` (3 subsequent siblings)
4 siblings, 3 replies; 14+ messages in thread
From: Viresh Kumar @ 2022-07-04 12:07 UTC (permalink / raw)
To: Rafael J. Wysocki, Viresh Kumar, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Qiang Yu,
Rob Herring, Tomeu Vizoso, Steven Price, Alyssa Rosenzweig,
Nishanth Menon, Stephen Boyd, Thierry Reding, Jonathan Hunter
Cc: linux-pm, Vincent Guittot, Greg Kroah-Hartman, linux-kernel,
linux-samsung-soc, linux-arm-kernel, dri-devel, lima, linux-tegra
Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
instead of making the callers keep the two parameters in sync, which
creates an opportunity for bugs to get in.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/cpufreq-dt.c | 9 ++++-----
drivers/cpufreq/ti-cpufreq.c | 7 +++----
drivers/devfreq/exynos-bus.c | 4 ++--
drivers/gpu/drm/lima/lima_devfreq.c | 3 ++-
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 4 ++--
drivers/opp/core.c | 18 ++++++++++++------
drivers/soc/tegra/pmc.c | 4 ++--
include/linux/pm_opp.h | 9 ++++-----
8 files changed, 31 insertions(+), 27 deletions(-)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 8fcaba541539..be0c19b3ffa5 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -193,7 +193,7 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
struct private_data *priv;
struct device *cpu_dev;
bool fallback = false;
- const char *reg_name;
+ const char *reg_name[] = { NULL, NULL };
int ret;
/* Check if this CPU is already covered by some other policy */
@@ -218,10 +218,9 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
* OPP layer will be taking care of regulators now, but it needs to know
* the name of the regulator first.
*/
- reg_name = find_supply_name(cpu_dev);
- if (reg_name) {
- priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, ®_name,
- 1);
+ reg_name[0] = find_supply_name(cpu_dev);
+ if (reg_name[0]) {
+ priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, reg_name);
if (IS_ERR(priv->opp_table)) {
ret = PTR_ERR(priv->opp_table);
if (ret != -EPROBE_DEFER)
diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
index 8f9fdd864391..560d67a6bef1 100644
--- a/drivers/cpufreq/ti-cpufreq.c
+++ b/drivers/cpufreq/ti-cpufreq.c
@@ -173,7 +173,7 @@ static struct ti_cpufreq_soc_data omap34xx_soc_data = {
* seems to always read as 0).
*/
-static const char * const omap3_reg_names[] = {"cpu0", "vbb"};
+static const char * const omap3_reg_names[] = {"cpu0", "vbb", NULL};
static struct ti_cpufreq_soc_data omap36xx_soc_data = {
.reg_names = omap3_reg_names,
@@ -326,7 +326,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
const struct of_device_id *match;
struct opp_table *ti_opp_table;
struct ti_cpufreq_data *opp_data;
- const char * const default_reg_names[] = {"vdd", "vbb"};
+ const char * const default_reg_names[] = {"vdd", "vbb", NULL};
int ret;
match = dev_get_platdata(&pdev->dev);
@@ -387,8 +387,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
if (opp_data->soc_data->reg_names)
reg_names = opp_data->soc_data->reg_names;
ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
- reg_names,
- ARRAY_SIZE(default_reg_names));
+ reg_names);
if (IS_ERR(ti_opp_table)) {
dev_pm_opp_put_supported_hw(opp_data->opp_table);
ret = PTR_ERR(ti_opp_table);
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index e689101abc93..541baff93ee8 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -180,10 +180,10 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
{
struct device *dev = bus->dev;
struct opp_table *opp_table;
- const char *vdd = "vdd";
+ const char *supplies[] = { "vdd", NULL };
int i, ret, count, size;
- opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
+ opp_table = dev_pm_opp_set_regulators(dev, supplies);
if (IS_ERR(opp_table)) {
ret = PTR_ERR(opp_table);
dev_err(dev, "failed to set regulators %d\n", ret);
diff --git a/drivers/gpu/drm/lima/lima_devfreq.c b/drivers/gpu/drm/lima/lima_devfreq.c
index 8989e215dfc9..dc83c5421125 100644
--- a/drivers/gpu/drm/lima/lima_devfreq.c
+++ b/drivers/gpu/drm/lima/lima_devfreq.c
@@ -111,6 +111,7 @@ int lima_devfreq_init(struct lima_device *ldev)
struct dev_pm_opp *opp;
unsigned long cur_freq;
int ret;
+ const char *regulator_names[] = { "mali", NULL };
if (!device_property_present(dev, "operating-points-v2"))
/* Optional, continue without devfreq */
@@ -122,7 +123,7 @@ int lima_devfreq_init(struct lima_device *ldev)
if (ret)
return ret;
- ret = devm_pm_opp_set_regulators(dev, (const char *[]){ "mali" }, 1);
+ ret = devm_pm_opp_set_regulators(dev, regulator_names);
if (ret) {
/* Continue if the optional regulator is missing */
if (ret != -ENODEV)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 194af7f607a6..12784f349550 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -91,6 +91,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
struct devfreq *devfreq;
struct thermal_cooling_device *cooling;
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
+ const char *supplies[] = { pfdev->comp->supply_names[0], NULL };
if (pfdev->comp->num_supplies > 1) {
/*
@@ -101,8 +102,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
return 0;
}
- ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
- pfdev->comp->num_supplies);
+ ret = devm_pm_opp_set_regulators(dev, supplies);
if (ret) {
/* Continue if the optional regulator is missing */
if (ret != -ENODEV) {
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index e166bfe5fc90..4e4593957ec5 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -2105,13 +2105,20 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
* This must be called before any OPPs are initialized for the device.
*/
struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
- const char * const names[],
- unsigned int count)
+ const char * const names[])
{
struct dev_pm_opp_supply *supplies;
+ const char * const *temp = names;
struct opp_table *opp_table;
struct regulator *reg;
- int ret, i;
+ int count = 0, ret, i;
+
+ /* Count number of regulators */
+ while (*temp++)
+ count++;
+
+ if (!count)
+ return ERR_PTR(-EINVAL);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
@@ -2236,12 +2243,11 @@ static void devm_pm_opp_regulators_release(void *data)
* Return: 0 on success and errorno otherwise.
*/
int devm_pm_opp_set_regulators(struct device *dev,
- const char * const names[],
- unsigned int count)
+ const char * const names[])
{
struct opp_table *opp_table;
- opp_table = dev_pm_opp_set_regulators(dev, names, count);
+ opp_table = dev_pm_opp_set_regulators(dev, names);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 5611d14d3ba2..6a4b8f7e7948 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -1384,7 +1384,7 @@ tegra_pmc_core_pd_opp_to_performance_state(struct generic_pm_domain *genpd,
static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
{
struct generic_pm_domain *genpd;
- const char *rname = "core";
+ const char *rname[] = { "core", NULL};
int err;
genpd = devm_kzalloc(pmc->dev, sizeof(*genpd), GFP_KERNEL);
@@ -1395,7 +1395,7 @@ static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
genpd->set_performance_state = tegra_pmc_core_pd_set_performance_state;
genpd->opp_to_performance_state = tegra_pmc_core_pd_opp_to_performance_state;
- err = devm_pm_opp_set_regulators(pmc->dev, &rname, 1);
+ err = devm_pm_opp_set_regulators(pmc->dev, rname);
if (err)
return dev_err_probe(pmc->dev, err,
"failed to set core OPP regulator\n");
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 6708b4ec244d..4c490865d574 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -159,9 +159,9 @@ void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
-struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
+struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[]);
void dev_pm_opp_put_regulators(struct opp_table *opp_table);
-int devm_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
+int devm_pm_opp_set_regulators(struct device *dev, const char * const names[]);
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
void dev_pm_opp_put_clkname(struct opp_table *opp_table);
int devm_pm_opp_set_clkname(struct device *dev, const char *name);
@@ -379,7 +379,7 @@ static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, con
static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
-static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
+static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[])
{
return ERR_PTR(-EOPNOTSUPP);
}
@@ -387,8 +387,7 @@ static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, co
static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
static inline int devm_pm_opp_set_regulators(struct device *dev,
- const char * const names[],
- unsigned int count)
+ const char * const names[])
{
return -EOPNOTSUPP;
}
--
2.31.1.272.g89b43f80a514
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH V3 05/20] cpufreq: sti: Migrate to dev_pm_opp_set_config()
2022-07-04 12:07 [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config() Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
@ 2022-07-04 12:07 ` Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 10/20] OPP: Migrate set-regulators API to use set-config helpers Viresh Kumar
` (2 subsequent siblings)
4 siblings, 0 replies; 14+ messages in thread
From: Viresh Kumar @ 2022-07-04 12:07 UTC (permalink / raw)
To: Patrice Chotard, Rafael J. Wysocki, Viresh Kumar
Cc: linux-pm, Vincent Guittot, Stephen Boyd, Nishanth Menon,
linux-arm-kernel, linux-kernel
The OPP core now provides a unified API for setting all configuration
types, i.e. dev_pm_opp_set_config().
Lets start using it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/sti-cpufreq.c | 27 ++++++++++-----------------
1 file changed, 10 insertions(+), 17 deletions(-)
diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c
index fdb0a722d881..a67df90848c2 100644
--- a/drivers/cpufreq/sti-cpufreq.c
+++ b/drivers/cpufreq/sti-cpufreq.c
@@ -156,9 +156,13 @@ static int sti_cpufreq_set_opp_info(void)
unsigned int hw_info_offset;
unsigned int version[VERSION_ELEMENTS];
int pcode, substrate, major, minor;
- int ret;
+ int opp_token, ret;
char name[MAX_PCODE_NAME_LEN];
- struct opp_table *opp_table;
+ struct dev_pm_opp_config config = {
+ .supported_hw = version,
+ .supported_hw_count = ARRAY_SIZE(version),
+ .prop_name = name,
+ };
reg_fields = sti_cpufreq_match();
if (!reg_fields) {
@@ -210,21 +214,14 @@ static int sti_cpufreq_set_opp_info(void)
snprintf(name, MAX_PCODE_NAME_LEN, "pcode%d", pcode);
- opp_table = dev_pm_opp_set_prop_name(dev, name);
- if (IS_ERR(opp_table)) {
- dev_err(dev, "Failed to set prop name\n");
- return PTR_ERR(opp_table);
- }
-
version[0] = BIT(major);
version[1] = BIT(minor);
version[2] = BIT(substrate);
- opp_table = dev_pm_opp_set_supported_hw(dev, version, VERSION_ELEMENTS);
- if (IS_ERR(opp_table)) {
- dev_err(dev, "Failed to set supported hardware\n");
- ret = PTR_ERR(opp_table);
- goto err_put_prop_name;
+ opp_token = dev_pm_opp_set_config(dev, &config);
+ if (opp_token < 0) {
+ dev_err(dev, "Failed to set OPP config\n");
+ return opp_token;
}
dev_dbg(dev, "pcode: %d major: %d minor: %d substrate: %d\n",
@@ -233,10 +230,6 @@ static int sti_cpufreq_set_opp_info(void)
version[0], version[1], version[2]);
return 0;
-
-err_put_prop_name:
- dev_pm_opp_put_prop_name(opp_table);
- return ret;
}
static int sti_cpufreq_fetch_syscon_registers(void)
--
2.31.1.272.g89b43f80a514
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^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH V3 10/20] OPP: Migrate set-regulators API to use set-config helpers
2022-07-04 12:07 [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config() Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 05/20] cpufreq: sti: Migrate to dev_pm_opp_set_config() Viresh Kumar
@ 2022-07-04 12:07 ` Viresh Kumar
2022-07-07 19:29 ` Chanwoo Choi
2022-07-04 12:07 ` [PATCH V3 11/20] OPP: Migrate set-supported-hw " Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 15/20] OPP: Migrate set-prop-name helper " Viresh Kumar
4 siblings, 1 reply; 14+ messages in thread
From: Viresh Kumar @ 2022-07-04 12:07 UTC (permalink / raw)
To: Rafael J. Wysocki, Viresh Kumar, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Nishanth Menon,
Stephen Boyd
Cc: linux-pm, Vincent Guittot, linux-kernel, linux-samsung-soc,
linux-arm-kernel
Now that we have a central API to handle all OPP table configurations,
migrate the set-regulators family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/cpufreq-dt.c | 12 ++---
drivers/devfreq/exynos-bus.c | 19 +++-----
drivers/opp/core.c | 91 ++++++++----------------------------
include/linux/pm_opp.h | 44 ++++++++++-------
4 files changed, 60 insertions(+), 106 deletions(-)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index be0c19b3ffa5..d69d13a26414 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -29,9 +29,9 @@ struct private_data {
cpumask_var_t cpus;
struct device *cpu_dev;
- struct opp_table *opp_table;
struct cpufreq_frequency_table *freq_table;
bool have_static_opps;
+ int opp_token;
};
static LIST_HEAD(priv_list);
@@ -220,9 +220,9 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
*/
reg_name[0] = find_supply_name(cpu_dev);
if (reg_name[0]) {
- priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, reg_name);
- if (IS_ERR(priv->opp_table)) {
- ret = PTR_ERR(priv->opp_table);
+ priv->opp_token = dev_pm_opp_set_regulators(cpu_dev, reg_name);
+ if (priv->opp_token < 0) {
+ ret = priv->opp_token;
if (ret != -EPROBE_DEFER)
dev_err(cpu_dev, "failed to set regulators: %d\n",
ret);
@@ -294,7 +294,7 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
out:
if (priv->have_static_opps)
dev_pm_opp_of_cpumask_remove_table(priv->cpus);
- dev_pm_opp_put_regulators(priv->opp_table);
+ dev_pm_opp_put_regulators(priv->opp_token);
free_cpumask:
free_cpumask_var(priv->cpus);
return ret;
@@ -308,7 +308,7 @@ static void dt_cpufreq_release(void)
dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &priv->freq_table);
if (priv->have_static_opps)
dev_pm_opp_of_cpumask_remove_table(priv->cpus);
- dev_pm_opp_put_regulators(priv->opp_table);
+ dev_pm_opp_put_regulators(priv->opp_token);
free_cpumask_var(priv->cpus);
list_del(&priv->node);
}
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 541baff93ee8..d1235242367f 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -33,7 +33,7 @@ struct exynos_bus {
unsigned long curr_freq;
- struct opp_table *opp_table;
+ int opp_token;
struct clk *clk;
unsigned int ratio;
};
@@ -161,8 +161,7 @@ static void exynos_bus_exit(struct device *dev)
dev_pm_opp_of_remove_table(dev);
clk_disable_unprepare(bus->clk);
- dev_pm_opp_put_regulators(bus->opp_table);
- bus->opp_table = NULL;
+ dev_pm_opp_put_regulators(bus->opp_token);
}
static void exynos_bus_passive_exit(struct device *dev)
@@ -179,18 +178,16 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
struct exynos_bus *bus)
{
struct device *dev = bus->dev;
- struct opp_table *opp_table;
const char *supplies[] = { "vdd", NULL };
int i, ret, count, size;
- opp_table = dev_pm_opp_set_regulators(dev, supplies);
- if (IS_ERR(opp_table)) {
- ret = PTR_ERR(opp_table);
+ ret = dev_pm_opp_set_regulators(dev, supplies);
+ if (ret < 0) {
dev_err(dev, "failed to set regulators %d\n", ret);
return ret;
}
- bus->opp_table = opp_table;
+ bus->opp_token = ret;
/*
* Get the devfreq-event devices to get the current utilization of
@@ -236,8 +233,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
return 0;
err_regulator:
- dev_pm_opp_put_regulators(bus->opp_table);
- bus->opp_table = NULL;
+ dev_pm_opp_put_regulators(bus->opp_token);
return ret;
}
@@ -459,8 +455,7 @@ static int exynos_bus_probe(struct platform_device *pdev)
dev_pm_opp_of_remove_table(dev);
clk_disable_unprepare(bus->clk);
err_reg:
- dev_pm_opp_put_regulators(bus->opp_table);
- bus->opp_table = NULL;
+ dev_pm_opp_put_regulators(bus->opp_token);
return ret;
}
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 7ab20c3b91ed..6ff9b5b69d07 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -991,8 +991,8 @@ static int _set_opp_custom(const struct opp_table *opp_table,
int size;
/*
- * We support this only if dev_pm_opp_set_regulators() was called
- * earlier.
+ * We support this only if dev_pm_opp_set_config() was called
+ * earlier to set regulators.
*/
if (opp_table->sod_supplies) {
size = sizeof(*old_opp->supplies) * opp_table->regulator_count;
@@ -2097,7 +2097,7 @@ void dev_pm_opp_put_prop_name(struct opp_table *opp_table)
EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
/**
- * dev_pm_opp_set_regulators() - Set regulator names for the device
+ * _opp_set_regulators() - Set regulator names for the device
* @dev: Device for which regulator name is being set.
* @names: Array of pointers to the names of the regulator.
* @count: Number of regulators.
@@ -2108,12 +2108,11 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
*
* This must be called before any OPPs are initialized for the device.
*/
-struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
- const char * const names[])
+static int _opp_set_regulators(struct opp_table *opp_table, struct device *dev,
+ const char * const names[])
{
struct dev_pm_opp_supply *supplies;
const char * const *temp = names;
- struct opp_table *opp_table;
struct regulator *reg;
int count = 0, ret, i;
@@ -2122,29 +2121,17 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
count++;
if (!count)
- return ERR_PTR(-EINVAL);
-
- opp_table = _add_opp_table(dev, false);
- if (IS_ERR(opp_table))
- return opp_table;
-
- /* This should be called before OPPs are initialized */
- if (WARN_ON(!list_empty(&opp_table->opp_list))) {
- ret = -EBUSY;
- goto err;
- }
+ return -EINVAL;
/* Another CPU that shares the OPP table has set the regulators ? */
if (opp_table->regulators)
- return opp_table;
+ return 0;
opp_table->regulators = kmalloc_array(count,
sizeof(*opp_table->regulators),
GFP_KERNEL);
- if (!opp_table->regulators) {
- ret = -ENOMEM;
- goto err;
- }
+ if (!opp_table->regulators)
+ return -ENOMEM;
for (i = 0; i < count; i++) {
reg = regulator_get_optional(dev, names[i]);
@@ -2174,7 +2161,7 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
}
mutex_unlock(&opp_table->lock);
- return opp_table;
+ return 0;
free_regulators:
while (i != 0)
@@ -2183,26 +2170,20 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
kfree(opp_table->regulators);
opp_table->regulators = NULL;
opp_table->regulator_count = -1;
-err:
- dev_pm_opp_put_opp_table(opp_table);
- return ERR_PTR(ret);
+ return ret;
}
-EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators);
/**
- * dev_pm_opp_put_regulators() - Releases resources blocked for regulator
- * @opp_table: OPP table returned from dev_pm_opp_set_regulators().
+ * _opp_put_regulators() - Releases resources blocked for regulator
+ * @opp_table: OPP table returned from _opp_set_regulators().
*/
-void dev_pm_opp_put_regulators(struct opp_table *opp_table)
+static void _opp_put_regulators(struct opp_table *opp_table)
{
int i;
- if (unlikely(!opp_table))
- return;
-
if (!opp_table->regulators)
- goto put_opp_table;
+ return;
if (opp_table->enabled) {
for (i = opp_table->regulator_count - 1; i >= 0; i--)
@@ -2225,40 +2206,7 @@ void dev_pm_opp_put_regulators(struct opp_table *opp_table)
kfree(opp_table->regulators);
opp_table->regulators = NULL;
opp_table->regulator_count = -1;
-
-put_opp_table:
- dev_pm_opp_put_opp_table(opp_table);
-}
-EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators);
-
-static void devm_pm_opp_regulators_release(void *data)
-{
- dev_pm_opp_put_regulators(data);
-}
-
-/**
- * devm_pm_opp_set_regulators() - Set regulator names for the device
- * @dev: Device for which regulator name is being set.
- * @names: Array of pointers to the names of the regulator.
- * @count: Number of regulators.
- *
- * This is a resource-managed variant of dev_pm_opp_set_regulators().
- *
- * Return: 0 on success and errorno otherwise.
- */
-int devm_pm_opp_set_regulators(struct device *dev,
- const char * const names[])
-{
- struct opp_table *opp_table;
-
- opp_table = dev_pm_opp_set_regulators(dev, names);
- if (IS_ERR(opp_table))
- return PTR_ERR(opp_table);
-
- return devm_add_action_or_reset(dev, devm_pm_opp_regulators_release,
- opp_table);
}
-EXPORT_SYMBOL_GPL(devm_pm_opp_set_regulators);
/**
* dev_pm_opp_set_clkname() - Set clk name for the device
@@ -2633,7 +2581,7 @@ static void _opp_clear_config(struct opp_config_data *data)
if (data->flags & OPP_CONFIG_GENPD)
dev_pm_opp_detach_genpd(data->opp_table);
if (data->flags & OPP_CONFIG_REGULATOR)
- dev_pm_opp_put_regulators(data->opp_table);
+ _opp_put_regulators(data->opp_table);
if (data->flags & OPP_CONFIG_SUPPORTED_HW)
dev_pm_opp_put_supported_hw(data->opp_table);
if (data->flags & OPP_CONFIG_REGULATOR_HELPER)
@@ -2758,11 +2706,10 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
/* Configure supplies */
if (config->regulator_names) {
- err = dev_pm_opp_set_regulators(dev, config->regulator_names);
- if (IS_ERR(err)) {
- ret = PTR_ERR(err);
+ ret = _opp_set_regulators(opp_table, dev,
+ config->regulator_names);
+ if (ret)
goto err;
- }
data->flags |= OPP_CONFIG_REGULATOR;
}
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index a08f9481efb3..f014bd172c99 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -189,9 +189,6 @@ void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
-struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[]);
-void dev_pm_opp_put_regulators(struct opp_table *opp_table);
-int devm_pm_opp_set_regulators(struct device *dev, const char * const names[]);
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
void dev_pm_opp_put_clkname(struct opp_table *opp_table);
int devm_pm_opp_set_clkname(struct device *dev, const char *name);
@@ -409,19 +406,6 @@ static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, con
static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
-static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[])
-{
- return ERR_PTR(-EOPNOTSUPP);
-}
-
-static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
-
-static inline int devm_pm_opp_set_regulators(struct device *dev,
- const char * const names[])
-{
- return -EOPNOTSUPP;
-}
-
static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
{
return ERR_PTR(-EOPNOTSUPP);
@@ -606,4 +590,32 @@ static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_ta
}
#endif
+/* OPP Configuration helpers */
+
+/* Regulators helpers */
+static inline int dev_pm_opp_set_regulators(struct device *dev,
+ const char * const names[])
+{
+ struct dev_pm_opp_config config = {
+ .regulator_names = names,
+ };
+
+ return dev_pm_opp_set_config(dev, &config);
+}
+
+static inline void dev_pm_opp_put_regulators(int token)
+{
+ dev_pm_opp_clear_config(token);
+}
+
+static inline int devm_pm_opp_set_regulators(struct device *dev,
+ const char * const names[])
+{
+ struct dev_pm_opp_config config = {
+ .regulator_names = names,
+ };
+
+ return devm_pm_opp_set_config(dev, &config);
+}
+
#endif /* __LINUX_OPP_H__ */
--
2.31.1.272.g89b43f80a514
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH V3 11/20] OPP: Migrate set-supported-hw API to use set-config helpers
2022-07-04 12:07 [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config() Viresh Kumar
` (2 preceding siblings ...)
2022-07-04 12:07 ` [PATCH V3 10/20] OPP: Migrate set-regulators API to use set-config helpers Viresh Kumar
@ 2022-07-04 12:07 ` Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 15/20] OPP: Migrate set-prop-name helper " Viresh Kumar
4 siblings, 0 replies; 14+ messages in thread
From: Viresh Kumar @ 2022-07-04 12:07 UTC (permalink / raw)
To: Rafael J. Wysocki, Viresh Kumar, Shawn Guo, Sascha Hauer,
Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team,
Thierry Reding, Jonathan Hunter, Krzysztof Kozlowski,
Nishanth Menon, Stephen Boyd
Cc: linux-pm, Vincent Guittot, linux-arm-kernel, linux-kernel,
linux-tegra
Now that we have a central API to handle all OPP table configurations,
migrate the set-supported-hw family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/imx-cpufreq-dt.c | 12 ++--
drivers/cpufreq/tegra20-cpufreq.c | 12 ++--
drivers/memory/tegra/tegra124-emc.c | 11 ++--
drivers/opp/core.c | 87 +++++++----------------------
include/linux/pm_opp.h | 49 +++++++++-------
5 files changed, 66 insertions(+), 105 deletions(-)
diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c
index 3fe9125156b4..76e553af2071 100644
--- a/drivers/cpufreq/imx-cpufreq-dt.c
+++ b/drivers/cpufreq/imx-cpufreq-dt.c
@@ -31,8 +31,8 @@
/* cpufreq-dt device registered by imx-cpufreq-dt */
static struct platform_device *cpufreq_dt_pdev;
-static struct opp_table *cpufreq_opp_table;
static struct device *cpu_dev;
+static int cpufreq_opp_token;
enum IMX7ULP_CPUFREQ_CLKS {
ARM,
@@ -153,9 +153,9 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "cpu speed grade %d mkt segment %d supported-hw %#x %#x\n",
speed_grade, mkt_segment, supported_hw[0], supported_hw[1]);
- cpufreq_opp_table = dev_pm_opp_set_supported_hw(cpu_dev, supported_hw, 2);
- if (IS_ERR(cpufreq_opp_table)) {
- ret = PTR_ERR(cpufreq_opp_table);
+ cpufreq_opp_token = dev_pm_opp_set_supported_hw(cpu_dev, supported_hw, 2);
+ if (cpufreq_opp_token < 0) {
+ ret = cpufreq_opp_token;
dev_err(&pdev->dev, "Failed to set supported opp: %d\n", ret);
return ret;
}
@@ -163,7 +163,7 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
cpufreq_dt_pdev = platform_device_register_data(
&pdev->dev, "cpufreq-dt", -1, NULL, 0);
if (IS_ERR(cpufreq_dt_pdev)) {
- dev_pm_opp_put_supported_hw(cpufreq_opp_table);
+ dev_pm_opp_put_supported_hw(cpufreq_opp_token);
ret = PTR_ERR(cpufreq_dt_pdev);
dev_err(&pdev->dev, "Failed to register cpufreq-dt: %d\n", ret);
return ret;
@@ -176,7 +176,7 @@ static int imx_cpufreq_dt_remove(struct platform_device *pdev)
{
platform_device_unregister(cpufreq_dt_pdev);
if (!of_machine_is_compatible("fsl,imx7ulp"))
- dev_pm_opp_put_supported_hw(cpufreq_opp_table);
+ dev_pm_opp_put_supported_hw(cpufreq_opp_token);
else
clk_bulk_put(ARRAY_SIZE(imx7ulp_clks), imx7ulp_clks);
diff --git a/drivers/cpufreq/tegra20-cpufreq.c b/drivers/cpufreq/tegra20-cpufreq.c
index e8db3d75be25..ab7ac7df9e62 100644
--- a/drivers/cpufreq/tegra20-cpufreq.c
+++ b/drivers/cpufreq/tegra20-cpufreq.c
@@ -32,9 +32,9 @@ static bool cpu0_node_has_opp_v2_prop(void)
return ret;
}
-static void tegra20_cpufreq_put_supported_hw(void *opp_table)
+static void tegra20_cpufreq_put_supported_hw(void *opp_token)
{
- dev_pm_opp_put_supported_hw(opp_table);
+ dev_pm_opp_put_supported_hw((unsigned long) opp_token);
}
static void tegra20_cpufreq_dt_unregister(void *cpufreq_dt)
@@ -45,7 +45,6 @@ static void tegra20_cpufreq_dt_unregister(void *cpufreq_dt)
static int tegra20_cpufreq_probe(struct platform_device *pdev)
{
struct platform_device *cpufreq_dt;
- struct opp_table *opp_table;
struct device *cpu_dev;
u32 versions[2];
int err;
@@ -71,16 +70,15 @@ static int tegra20_cpufreq_probe(struct platform_device *pdev)
if (WARN_ON(!cpu_dev))
return -ENODEV;
- opp_table = dev_pm_opp_set_supported_hw(cpu_dev, versions, 2);
- err = PTR_ERR_OR_ZERO(opp_table);
- if (err) {
+ err = dev_pm_opp_set_supported_hw(cpu_dev, versions, 2);
+ if (err < 0) {
dev_err(&pdev->dev, "failed to set supported hw: %d\n", err);
return err;
}
err = devm_add_action_or_reset(&pdev->dev,
tegra20_cpufreq_put_supported_hw,
- opp_table);
+ (void *)((unsigned long) err));
if (err)
return err;
diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c
index 908f8d5392b2..85bc936c02f9 100644
--- a/drivers/memory/tegra/tegra124-emc.c
+++ b/drivers/memory/tegra/tegra124-emc.c
@@ -1395,15 +1395,14 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc)
static int tegra_emc_opp_table_init(struct tegra_emc *emc)
{
u32 hw_version = BIT(tegra_sku_info.soc_speedo_id);
- struct opp_table *hw_opp_table;
- int err;
+ int opp_token, err;
- hw_opp_table = dev_pm_opp_set_supported_hw(emc->dev, &hw_version, 1);
- err = PTR_ERR_OR_ZERO(hw_opp_table);
- if (err) {
+ err = dev_pm_opp_set_supported_hw(emc->dev, &hw_version, 1);
+ if (err < 0) {
dev_err(emc->dev, "failed to set OPP supported HW: %d\n", err);
return err;
}
+ opp_token = err;
err = dev_pm_opp_of_add_table(emc->dev);
if (err) {
@@ -1430,7 +1429,7 @@ static int tegra_emc_opp_table_init(struct tegra_emc *emc)
remove_table:
dev_pm_opp_of_remove_table(emc->dev);
put_hw_table:
- dev_pm_opp_put_supported_hw(hw_opp_table);
+ dev_pm_opp_put_supported_hw(opp_token);
return err;
}
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 6ff9b5b69d07..8dbdfff38973 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1952,7 +1952,7 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
}
/**
- * dev_pm_opp_set_supported_hw() - Set supported platforms
+ * _opp_set_supported_hw() - Set supported platforms
* @dev: Device for which supported-hw has to be set.
* @versions: Array of hierarchy of versions to match.
* @count: Number of elements in the array.
@@ -1962,84 +1962,39 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev,
* OPPs, which are available for those versions, based on its 'opp-supported-hw'
* property.
*/
-struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
- const u32 *versions, unsigned int count)
+static int _opp_set_supported_hw(struct opp_table *opp_table,
+ const u32 *versions, unsigned int count)
{
- struct opp_table *opp_table;
-
- opp_table = _add_opp_table(dev, false);
- if (IS_ERR(opp_table))
- return opp_table;
-
- /* Make sure there are no concurrent readers while updating opp_table */
- WARN_ON(!list_empty(&opp_table->opp_list));
-
/* Another CPU that shares the OPP table has set the property ? */
if (opp_table->supported_hw)
- return opp_table;
+ return 0;
opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions),
GFP_KERNEL);
- if (!opp_table->supported_hw) {
- dev_pm_opp_put_opp_table(opp_table);
- return ERR_PTR(-ENOMEM);
- }
+ if (!opp_table->supported_hw)
+ return -ENOMEM;
opp_table->supported_hw_count = count;
- return opp_table;
+ return 0;
}
-EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw);
/**
- * dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw
- * @opp_table: OPP table returned by dev_pm_opp_set_supported_hw().
+ * _opp_put_supported_hw() - Releases resources blocked for supported hw
+ * @opp_table: OPP table returned by _opp_set_supported_hw().
*
* This is required only for the V2 bindings, and is called for a matching
- * dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure
+ * _opp_set_supported_hw(). Until this is called, the opp_table structure
* will not be freed.
*/
-void dev_pm_opp_put_supported_hw(struct opp_table *opp_table)
+static void _opp_put_supported_hw(struct opp_table *opp_table)
{
- if (unlikely(!opp_table))
- return;
-
- kfree(opp_table->supported_hw);
- opp_table->supported_hw = NULL;
- opp_table->supported_hw_count = 0;
-
- dev_pm_opp_put_opp_table(opp_table);
-}
-EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw);
-
-static void devm_pm_opp_supported_hw_release(void *data)
-{
- dev_pm_opp_put_supported_hw(data);
-}
-
-/**
- * devm_pm_opp_set_supported_hw() - Set supported platforms
- * @dev: Device for which supported-hw has to be set.
- * @versions: Array of hierarchy of versions to match.
- * @count: Number of elements in the array.
- *
- * This is a resource-managed variant of dev_pm_opp_set_supported_hw().
- *
- * Return: 0 on success and errorno otherwise.
- */
-int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
- unsigned int count)
-{
- struct opp_table *opp_table;
-
- opp_table = dev_pm_opp_set_supported_hw(dev, versions, count);
- if (IS_ERR(opp_table))
- return PTR_ERR(opp_table);
-
- return devm_add_action_or_reset(dev, devm_pm_opp_supported_hw_release,
- opp_table);
+ if (opp_table->supported_hw) {
+ kfree(opp_table->supported_hw);
+ opp_table->supported_hw = NULL;
+ opp_table->supported_hw_count = 0;
+ }
}
-EXPORT_SYMBOL_GPL(devm_pm_opp_set_supported_hw);
/**
* dev_pm_opp_set_prop_name() - Set prop-extn name
@@ -2583,7 +2538,7 @@ static void _opp_clear_config(struct opp_config_data *data)
if (data->flags & OPP_CONFIG_REGULATOR)
_opp_put_regulators(data->opp_table);
if (data->flags & OPP_CONFIG_SUPPORTED_HW)
- dev_pm_opp_put_supported_hw(data->opp_table);
+ _opp_put_supported_hw(data->opp_table);
if (data->flags & OPP_CONFIG_REGULATOR_HELPER)
dev_pm_opp_unregister_set_opp_helper(data->opp_table);
if (data->flags & OPP_CONFIG_PROP_NAME)
@@ -2694,12 +2649,10 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
/* Configure supported hardware */
if (config->supported_hw) {
- err = dev_pm_opp_set_supported_hw(dev, config->supported_hw,
- config->supported_hw_count);
- if (IS_ERR(err)) {
- ret = PTR_ERR(err);
+ ret = _opp_set_supported_hw(opp_table, config->supported_hw,
+ config->supported_hw_count);
+ if (ret)
goto err;
- }
data->flags |= OPP_CONFIG_SUPPORTED_HW;
}
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index f014bd172c99..94d0101c254c 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -184,9 +184,6 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
void dev_pm_opp_clear_config(int token);
-struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
-void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
-int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
@@ -369,22 +366,6 @@ static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct noti
return -EOPNOTSUPP;
}
-static inline struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
- const u32 *versions,
- unsigned int count)
-{
- return ERR_PTR(-EOPNOTSUPP);
-}
-
-static inline void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) {}
-
-static inline int devm_pm_opp_set_supported_hw(struct device *dev,
- const u32 *versions,
- unsigned int count)
-{
- return -EOPNOTSUPP;
-}
-
static inline struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
int (*set_opp)(struct dev_pm_set_opp_data *data))
{
@@ -618,4 +599,34 @@ static inline int devm_pm_opp_set_regulators(struct device *dev,
return devm_pm_opp_set_config(dev, &config);
}
+/* Supported-hw helpers */
+static inline int dev_pm_opp_set_supported_hw(struct device *dev,
+ const u32 *versions,
+ unsigned int count)
+{
+ struct dev_pm_opp_config config = {
+ .supported_hw = versions,
+ .supported_hw_count = count,
+ };
+
+ return dev_pm_opp_set_config(dev, &config);
+}
+
+static inline void dev_pm_opp_put_supported_hw(int token)
+{
+ dev_pm_opp_clear_config(token);
+}
+
+static inline int devm_pm_opp_set_supported_hw(struct device *dev,
+ const u32 *versions,
+ unsigned int count)
+{
+ struct dev_pm_opp_config config = {
+ .supported_hw = versions,
+ .supported_hw_count = count,
+ };
+
+ return devm_pm_opp_set_config(dev, &config);
+}
+
#endif /* __LINUX_OPP_H__ */
--
2.31.1.272.g89b43f80a514
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH V3 15/20] OPP: Migrate set-prop-name helper API to use set-config helpers
2022-07-04 12:07 [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config() Viresh Kumar
` (3 preceding siblings ...)
2022-07-04 12:07 ` [PATCH V3 11/20] OPP: Migrate set-supported-hw " Viresh Kumar
@ 2022-07-04 12:07 ` Viresh Kumar
2022-07-04 18:59 ` Samuel Holland
4 siblings, 1 reply; 14+ messages in thread
From: Viresh Kumar @ 2022-07-04 12:07 UTC (permalink / raw)
To: Yangtao Li, Rafael J. Wysocki, Viresh Kumar, Chen-Yu Tsai,
Jernej Skrabec, Samuel Holland, Nishanth Menon, Stephen Boyd
Cc: linux-pm, Vincent Guittot, linux-arm-kernel, linux-sunxi,
linux-kernel
Now that we have a central API to handle all OPP table configurations,
migrate the set-prop-name family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/sun50i-cpufreq-nvmem.c | 31 +++++++--------
drivers/opp/core.c | 55 +++++++++-----------------
include/linux/pm_opp.h | 23 ++++++-----
3 files changed, 46 insertions(+), 63 deletions(-)
diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 75e1bf3a08f7..a4922580ce06 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -86,20 +86,20 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
{
- struct opp_table **opp_tables;
+ int *opp_tokens;
char name[MAX_NAME_LEN];
unsigned int cpu;
u32 speed = 0;
int ret;
- opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
+ opp_tokens = kcalloc(num_possible_cpus(), sizeof(*opp_tokens),
GFP_KERNEL);
- if (!opp_tables)
+ if (!opp_tokens)
return -ENOMEM;
ret = sun50i_cpufreq_get_efuse(&speed);
if (ret) {
- kfree(opp_tables);
+ kfree(opp_tokens);
return ret;
}
@@ -113,9 +113,9 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
goto free_opp;
}
- opp_tables[cpu] = dev_pm_opp_set_prop_name(cpu_dev, name);
- if (IS_ERR(opp_tables[cpu])) {
- ret = PTR_ERR(opp_tables[cpu]);
+ opp_tokens[cpu] = dev_pm_opp_set_prop_name(cpu_dev, name);
+ if (opp_tokens[cpu] < 0) {
+ ret = opp_tokens[cpu];
pr_err("Failed to set prop name\n");
goto free_opp;
}
@@ -124,7 +124,7 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
NULL, 0);
if (!IS_ERR(cpufreq_dt_pdev)) {
- platform_set_drvdata(pdev, opp_tables);
+ platform_set_drvdata(pdev, opp_tokens);
return 0;
}
@@ -132,27 +132,24 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
pr_err("Failed to register platform device\n");
free_opp:
- for_each_possible_cpu(cpu) {
- if (IS_ERR_OR_NULL(opp_tables[cpu]))
- break;
- dev_pm_opp_put_prop_name(opp_tables[cpu]);
- }
- kfree(opp_tables);
+ for_each_possible_cpu(cpu)
+ dev_pm_opp_put_prop_name(opp_tokens[cpu]);
+ kfree(opp_tokens);
return ret;
}
static int sun50i_cpufreq_nvmem_remove(struct platform_device *pdev)
{
- struct opp_table **opp_tables = platform_get_drvdata(pdev);
+ int *opp_tokens = platform_get_drvdata(pdev);
unsigned int cpu;
platform_device_unregister(cpufreq_dt_pdev);
for_each_possible_cpu(cpu)
- dev_pm_opp_put_prop_name(opp_tables[cpu]);
+ dev_pm_opp_put_prop_name(opp_tokens[cpu]);
- kfree(opp_tables);
+ kfree(opp_tokens);
return 0;
}
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 458584994c2b..1745e25c1eaf 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1997,7 +1997,7 @@ static void _opp_put_supported_hw(struct opp_table *opp_table)
}
/**
- * dev_pm_opp_set_prop_name() - Set prop-extn name
+ * _opp_set_prop_name() - Set prop-extn name
* @dev: Device for which the prop-name has to be set.
* @name: name to postfix to properties.
*
@@ -2006,50 +2006,33 @@ static void _opp_put_supported_hw(struct opp_table *opp_table)
* which the extension will apply are opp-microvolt and opp-microamp. OPP core
* should postfix the property name with -<name> while looking for them.
*/
-struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
+static int _opp_set_prop_name(struct opp_table *opp_table, const char *name)
{
- struct opp_table *opp_table;
-
- opp_table = _add_opp_table(dev, false);
- if (IS_ERR(opp_table))
- return opp_table;
-
- /* Make sure there are no concurrent readers while updating opp_table */
- WARN_ON(!list_empty(&opp_table->opp_list));
-
/* Another CPU that shares the OPP table has set the property ? */
- if (opp_table->prop_name)
- return opp_table;
-
- opp_table->prop_name = kstrdup(name, GFP_KERNEL);
if (!opp_table->prop_name) {
- dev_pm_opp_put_opp_table(opp_table);
- return ERR_PTR(-ENOMEM);
+ opp_table->prop_name = kstrdup(name, GFP_KERNEL);
+ if (!opp_table->prop_name)
+ return -ENOMEM;
}
- return opp_table;
+ return 0;
}
-EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name);
/**
- * dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name
- * @opp_table: OPP table returned by dev_pm_opp_set_prop_name().
+ * _opp_put_prop_name() - Releases resources blocked for prop-name
+ * @opp_table: OPP table returned by _opp_set_prop_name().
*
* This is required only for the V2 bindings, and is called for a matching
- * dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure
+ * _opp_set_prop_name(). Until this is called, the opp_table structure
* will not be freed.
*/
-void dev_pm_opp_put_prop_name(struct opp_table *opp_table)
+static void _opp_put_prop_name(struct opp_table *opp_table)
{
- if (unlikely(!opp_table))
- return;
-
- kfree(opp_table->prop_name);
- opp_table->prop_name = NULL;
-
- dev_pm_opp_put_opp_table(opp_table);
+ if (opp_table->prop_name) {
+ kfree(opp_table->prop_name);
+ opp_table->prop_name = NULL;
+ }
}
-EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
/**
* _opp_set_regulators() - Set regulator names for the device
@@ -2414,7 +2397,7 @@ static void _opp_clear_config(struct opp_config_data *data)
if (data->flags & OPP_CONFIG_REGULATOR_HELPER)
_opp_unregister_set_opp_helper(data->opp_table);
if (data->flags & OPP_CONFIG_PROP_NAME)
- dev_pm_opp_put_prop_name(data->opp_table);
+ _opp_put_prop_name(data->opp_table);
if (data->flags & OPP_CONFIG_CLK)
_opp_put_clknames(data->opp_table);
@@ -2441,7 +2424,7 @@ static void _opp_clear_config(struct opp_config_data *data)
*/
int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
{
- struct opp_table *opp_table, *err;
+ struct opp_table *opp_table;
struct opp_config_data *data;
unsigned int id;
int ret;
@@ -2476,11 +2459,9 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
/* Configure property names */
if (config->prop_name) {
- err = dev_pm_opp_set_prop_name(dev, config->prop_name);
- if (IS_ERR(err)) {
- ret = PTR_ERR(err);
+ ret = _opp_set_prop_name(opp_table, config->prop_name);
+ if (ret)
goto err;
- }
data->flags |= OPP_CONFIG_PROP_NAME;
}
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 20e1e5060a8a..f995ca1406e8 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -184,8 +184,6 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
void dev_pm_opp_clear_config(int token);
-struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
-void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, struct opp_table *dst_table, struct dev_pm_opp *src_opp);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
@@ -357,13 +355,6 @@ static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct noti
return -EOPNOTSUPP;
}
-static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
-{
- return ERR_PTR(-EOPNOTSUPP);
-}
-
-static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
-
static inline int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
{
return -EOPNOTSUPP;
@@ -652,5 +643,19 @@ static inline int devm_pm_opp_attach_genpd(struct device *dev,
return devm_pm_opp_set_config(dev, &config);
}
+/* prop-name helpers */
+static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
+{
+ struct dev_pm_opp_config config = {
+ .prop_name = name,
+ };
+
+ return dev_pm_opp_set_config(dev, &config);
+}
+
+static inline void dev_pm_opp_put_prop_name(int token)
+{
+ dev_pm_opp_clear_config(token);
+}
#endif /* __LINUX_OPP_H__ */
--
2.31.1.272.g89b43f80a514
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
@ 2022-07-04 14:35 ` Steven Price
2022-07-05 4:34 ` Viresh Kumar
2022-07-06 8:18 ` [PATCH V3.1 " Viresh Kumar
2022-07-07 19:04 ` [PATCH V3 " Chanwoo Choi
2 siblings, 1 reply; 14+ messages in thread
From: Steven Price @ 2022-07-04 14:35 UTC (permalink / raw)
To: Viresh Kumar, Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Qiang Yu,
Rob Herring, Tomeu Vizoso, Alyssa Rosenzweig, Nishanth Menon,
Stephen Boyd, Thierry Reding, Jonathan Hunter
Cc: linux-pm, Vincent Guittot, Greg Kroah-Hartman, linux-kernel,
linux-samsung-soc, linux-arm-kernel, dri-devel, lima, linux-tegra
On 04/07/2022 13:07, Viresh Kumar wrote:
> Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
> instead of making the callers keep the two parameters in sync, which
> creates an opportunity for bugs to get in.
>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> drivers/cpufreq/cpufreq-dt.c | 9 ++++-----
> drivers/cpufreq/ti-cpufreq.c | 7 +++----
> drivers/devfreq/exynos-bus.c | 4 ++--
> drivers/gpu/drm/lima/lima_devfreq.c | 3 ++-
> drivers/gpu/drm/panfrost/panfrost_devfreq.c | 4 ++--
> drivers/opp/core.c | 18 ++++++++++++------
> drivers/soc/tegra/pmc.c | 4 ++--
> include/linux/pm_opp.h | 9 ++++-----
> 8 files changed, 31 insertions(+), 27 deletions(-)
>
[...]
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> index 194af7f607a6..12784f349550 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> @@ -91,6 +91,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
> struct devfreq *devfreq;
> struct thermal_cooling_device *cooling;
> struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
> + const char *supplies[] = { pfdev->comp->supply_names[0], NULL };
>
> if (pfdev->comp->num_supplies > 1) {
> /*
> @@ -101,8 +102,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
> return 0;
> }
>
> - ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
> - pfdev->comp->num_supplies);
> + ret = devm_pm_opp_set_regulators(dev, supplies);
> if (ret) {
> /* Continue if the optional regulator is missing */
> if (ret != -ENODEV) {
I have to say the 'new improved' list ending with NULL approach doesn't
work out so well for Panfrost. We already have to have a separate
'num_supplies' variable for devm_regulator_bulk_get() /
regulator_bulk_{en,dis}able(), so the keeping everything in sync
argument is lost here.
I would suggest added the NULL on the end of the lists in panfrost_drv.c
but then it would break the use of ARRAY_SIZE() to automagically keep
the length correct...
For now the approach isn't too bad because Panfrost doesn't yet support
enabling devfreq with more than one supply. But that array isn't going
to work so nicely when that restriction is removed.
The only sane way I can see of handling this in Panfrost would be
replicating the loop to count the supplies in the Panfrost code which
would allow dropping num_supplies from struct panfrost_compatible and
then supply_names in the same struct could be NULL terminated ready for
devm_pm_opp_set_regulators().
Steve
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index e166bfe5fc90..4e4593957ec5 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -2105,13 +2105,20 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
> * This must be called before any OPPs are initialized for the device.
> */
> struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
> - const char * const names[],
> - unsigned int count)
> + const char * const names[])
> {
> struct dev_pm_opp_supply *supplies;
> + const char * const *temp = names;
> struct opp_table *opp_table;
> struct regulator *reg;
> - int ret, i;
> + int count = 0, ret, i;
> +
> + /* Count number of regulators */
> + while (*temp++)
> + count++;
> +
> + if (!count)
> + return ERR_PTR(-EINVAL);
>
> opp_table = _add_opp_table(dev, false);
> if (IS_ERR(opp_table))
> @@ -2236,12 +2243,11 @@ static void devm_pm_opp_regulators_release(void *data)
> * Return: 0 on success and errorno otherwise.
> */
> int devm_pm_opp_set_regulators(struct device *dev,
> - const char * const names[],
> - unsigned int count)
> + const char * const names[])
> {
> struct opp_table *opp_table;
>
> - opp_table = dev_pm_opp_set_regulators(dev, names, count);
> + opp_table = dev_pm_opp_set_regulators(dev, names);
> if (IS_ERR(opp_table))
> return PTR_ERR(opp_table);
>
> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
> index 5611d14d3ba2..6a4b8f7e7948 100644
> --- a/drivers/soc/tegra/pmc.c
> +++ b/drivers/soc/tegra/pmc.c
> @@ -1384,7 +1384,7 @@ tegra_pmc_core_pd_opp_to_performance_state(struct generic_pm_domain *genpd,
> static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
> {
> struct generic_pm_domain *genpd;
> - const char *rname = "core";
> + const char *rname[] = { "core", NULL};
> int err;
>
> genpd = devm_kzalloc(pmc->dev, sizeof(*genpd), GFP_KERNEL);
> @@ -1395,7 +1395,7 @@ static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
> genpd->set_performance_state = tegra_pmc_core_pd_set_performance_state;
> genpd->opp_to_performance_state = tegra_pmc_core_pd_opp_to_performance_state;
>
> - err = devm_pm_opp_set_regulators(pmc->dev, &rname, 1);
> + err = devm_pm_opp_set_regulators(pmc->dev, rname);
> if (err)
> return dev_err_probe(pmc->dev, err,
> "failed to set core OPP regulator\n");
> diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
> index 6708b4ec244d..4c490865d574 100644
> --- a/include/linux/pm_opp.h
> +++ b/include/linux/pm_opp.h
> @@ -159,9 +159,9 @@ void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
> int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
> struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
> void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
> -struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
> +struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[]);
> void dev_pm_opp_put_regulators(struct opp_table *opp_table);
> -int devm_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
> +int devm_pm_opp_set_regulators(struct device *dev, const char * const names[]);
> struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
> void dev_pm_opp_put_clkname(struct opp_table *opp_table);
> int devm_pm_opp_set_clkname(struct device *dev, const char *name);
> @@ -379,7 +379,7 @@ static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, con
>
> static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
>
> -static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
> +static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[])
> {
> return ERR_PTR(-EOPNOTSUPP);
> }
> @@ -387,8 +387,7 @@ static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, co
> static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
>
> static inline int devm_pm_opp_set_regulators(struct device *dev,
> - const char * const names[],
> - unsigned int count)
> + const char * const names[])
> {
> return -EOPNOTSUPP;
> }
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH V3 15/20] OPP: Migrate set-prop-name helper API to use set-config helpers
2022-07-04 12:07 ` [PATCH V3 15/20] OPP: Migrate set-prop-name helper " Viresh Kumar
@ 2022-07-04 18:59 ` Samuel Holland
0 siblings, 0 replies; 14+ messages in thread
From: Samuel Holland @ 2022-07-04 18:59 UTC (permalink / raw)
To: Viresh Kumar
Cc: Yangtao Li, Rafael J. Wysocki, Chen-Yu Tsai, Jernej Skrabec,
Nishanth Menon, Stephen Boyd, linux-pm, Vincent Guittot,
linux-arm-kernel, linux-sunxi, linux-kernel
On 7/4/22 7:07 AM, Viresh Kumar wrote:
> Now that we have a central API to handle all OPP table configurations,
> migrate the set-prop-name family of helpers to use the new
> infrastructure.
>
> The return type and parameter to the APIs change a bit due to this,
> update the current users as well in the same commit in order to avoid
> breaking builds.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> drivers/cpufreq/sun50i-cpufreq-nvmem.c | 31 +++++++--------
For sun50i-cpufreq-nvmem.c:
Acked-by: Samuel Holland <samuel@sholland.org>
> drivers/opp/core.c | 55 +++++++++-----------------
> include/linux/pm_opp.h | 23 ++++++-----
> 3 files changed, 46 insertions(+), 63 deletions(-)
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-04 14:35 ` Steven Price
@ 2022-07-05 4:34 ` Viresh Kumar
2022-07-06 8:09 ` Steven Price
0 siblings, 1 reply; 14+ messages in thread
From: Viresh Kumar @ 2022-07-05 4:34 UTC (permalink / raw)
To: Steven Price
Cc: Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham, Kyungmin Park,
Krzysztof Kozlowski, Alim Akhtar, Qiang Yu, Rob Herring,
Tomeu Vizoso, Alyssa Rosenzweig, Nishanth Menon, Stephen Boyd,
Thierry Reding, Jonathan Hunter, linux-pm, Vincent Guittot,
Greg Kroah-Hartman, linux-kernel, linux-samsung-soc,
linux-arm-kernel, dri-devel, lima, linux-tegra
On 04-07-22, 15:35, Steven Price wrote:
> I have to say the 'new improved' list ending with NULL approach doesn't
> work out so well for Panfrost. We already have to have a separate
> 'num_supplies' variable for devm_regulator_bulk_get() /
> regulator_bulk_{en,dis}able(), so the keeping everything in sync
> argument is lost here.
>
> I would suggest added the NULL on the end of the lists in panfrost_drv.c
> but then it would break the use of ARRAY_SIZE() to automagically keep
> the length correct...
Actually we can still make it work.
> For now the approach isn't too bad because Panfrost doesn't yet support
> enabling devfreq with more than one supply. But that array isn't going
> to work so nicely when that restriction is removed.
>
> The only sane way I can see of handling this in Panfrost would be
> replicating the loop to count the supplies in the Panfrost code which
> would allow dropping num_supplies from struct panfrost_compatible and
> then supply_names in the same struct could be NULL terminated ready for
> devm_pm_opp_set_regulators().
Or doing this, which will simplify both the cases.
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 7fcbc2a5b6cd..b3b55565b8ef 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -625,24 +625,29 @@ static int panfrost_remove(struct platform_device *pdev)
return 0;
}
-static const char * const default_supplies[] = { "mali" };
+/*
+ * The OPP core wants the supply names to be NULL terminated, but we need the
+ * correct num_supplies value for regulator core. Hence, we NULL terminate here
+ * and then initialize num_supplies with ARRAY_SIZE - 1.
+ */
+static const char * const default_supplies[] = { "mali", NULL };
static const struct panfrost_compatible default_data = {
- .num_supplies = ARRAY_SIZE(default_supplies),
+ .num_supplies = ARRAY_SIZE(default_supplies) - 1,
.supply_names = default_supplies,
.num_pm_domains = 1, /* optional */
.pm_domain_names = NULL,
};
static const struct panfrost_compatible amlogic_data = {
- .num_supplies = ARRAY_SIZE(default_supplies),
+ .num_supplies = ARRAY_SIZE(default_supplies) - 1,
.supply_names = default_supplies,
.vendor_quirk = panfrost_gpu_amlogic_quirk,
};
-static const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
+static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
static const struct panfrost_compatible mediatek_mt8183_data = {
- .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
+ .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
.supply_names = mediatek_mt8183_supplies,
.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
.pm_domain_names = mediatek_mt8183_pm_domains,
--
viresh
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^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-05 4:34 ` Viresh Kumar
@ 2022-07-06 8:09 ` Steven Price
0 siblings, 0 replies; 14+ messages in thread
From: Steven Price @ 2022-07-06 8:09 UTC (permalink / raw)
To: Viresh Kumar
Cc: Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham, Kyungmin Park,
Krzysztof Kozlowski, Alim Akhtar, Qiang Yu, Rob Herring,
Tomeu Vizoso, Alyssa Rosenzweig, Nishanth Menon, Stephen Boyd,
Thierry Reding, Jonathan Hunter, linux-pm, Vincent Guittot,
Greg Kroah-Hartman, linux-kernel, linux-samsung-soc,
linux-arm-kernel, dri-devel, lima, linux-tegra
On 05/07/2022 05:34, Viresh Kumar wrote:
> On 04-07-22, 15:35, Steven Price wrote:
>> I have to say the 'new improved' list ending with NULL approach doesn't
>> work out so well for Panfrost. We already have to have a separate
>> 'num_supplies' variable for devm_regulator_bulk_get() /
>> regulator_bulk_{en,dis}able(), so the keeping everything in sync
>> argument is lost here.
>>
>> I would suggest added the NULL on the end of the lists in panfrost_drv.c
>> but then it would break the use of ARRAY_SIZE() to automagically keep
>> the length correct...
>
> Actually we can still make it work.
>
>> For now the approach isn't too bad because Panfrost doesn't yet support
>> enabling devfreq with more than one supply. But that array isn't going
>> to work so nicely when that restriction is removed.
>>
>> The only sane way I can see of handling this in Panfrost would be
>> replicating the loop to count the supplies in the Panfrost code which
>> would allow dropping num_supplies from struct panfrost_compatible and
>> then supply_names in the same struct could be NULL terminated ready for
>> devm_pm_opp_set_regulators().
>
> Or doing this, which will simplify both the cases.
Yes the below works, it's just a bit ugly having the "- 1", and
potentially easy to forgot when adding another. However I don't suppose
it would get far in that case so I think it would be spotted quickly
when adding a new compatible.
It's probably the best solution at the moment.
Thanks,
Steve
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 7fcbc2a5b6cd..b3b55565b8ef 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -625,24 +625,29 @@ static int panfrost_remove(struct platform_device *pdev)
> return 0;
> }
>
> -static const char * const default_supplies[] = { "mali" };
> +/*
> + * The OPP core wants the supply names to be NULL terminated, but we need the
> + * correct num_supplies value for regulator core. Hence, we NULL terminate here
> + * and then initialize num_supplies with ARRAY_SIZE - 1.
> + */
> +static const char * const default_supplies[] = { "mali", NULL };
> static const struct panfrost_compatible default_data = {
> - .num_supplies = ARRAY_SIZE(default_supplies),
> + .num_supplies = ARRAY_SIZE(default_supplies) - 1,
> .supply_names = default_supplies,
> .num_pm_domains = 1, /* optional */
> .pm_domain_names = NULL,
> };
>
> static const struct panfrost_compatible amlogic_data = {
> - .num_supplies = ARRAY_SIZE(default_supplies),
> + .num_supplies = ARRAY_SIZE(default_supplies) - 1,
> .supply_names = default_supplies,
> .vendor_quirk = panfrost_gpu_amlogic_quirk,
> };
>
> -static const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
> +static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
> static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
> static const struct panfrost_compatible mediatek_mt8183_data = {
> - .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
> + .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
> .supply_names = mediatek_mt8183_supplies,
> .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
> .pm_domain_names = mediatek_mt8183_pm_domains,
>
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^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH V3.1 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
2022-07-04 14:35 ` Steven Price
@ 2022-07-06 8:18 ` Viresh Kumar
2022-07-06 9:50 ` Steven Price
2022-07-07 19:04 ` [PATCH V3 " Chanwoo Choi
2 siblings, 1 reply; 14+ messages in thread
From: Viresh Kumar @ 2022-07-06 8:18 UTC (permalink / raw)
To: Viresh Kumar, Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Qiang Yu,
Rob Herring, Tomeu Vizoso, Steven Price, Alyssa Rosenzweig,
Nishanth Menon, Stephen Boyd, Thierry Reding, Jonathan Hunter,
Matthias Brugger
Cc: linux-pm, Vincent Guittot, Greg Kroah-Hartman, linux-kernel,
linux-samsung-soc, linux-arm-kernel, dri-devel, lima, linux-tegra,
linux-mediatek
Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
instead of making the callers keep the two parameters in sync, which
creates an opportunity for bugs to get in.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
V3->V3.1:
- Update panfrost_drv.c to include the NULL element.
drivers/cpufreq/cpufreq-dt.c | 9 ++++-----
drivers/cpufreq/ti-cpufreq.c | 7 +++----
drivers/devfreq/exynos-bus.c | 4 ++--
drivers/gpu/drm/lima/lima_devfreq.c | 3 ++-
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 3 +--
drivers/gpu/drm/panfrost/panfrost_drv.c | 15 ++++++++++-----
drivers/opp/core.c | 18 ++++++++++++------
drivers/soc/tegra/pmc.c | 4 ++--
include/linux/pm_opp.h | 9 ++++-----
9 files changed, 40 insertions(+), 32 deletions(-)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 8fcaba541539..be0c19b3ffa5 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -193,7 +193,7 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
struct private_data *priv;
struct device *cpu_dev;
bool fallback = false;
- const char *reg_name;
+ const char *reg_name[] = { NULL, NULL };
int ret;
/* Check if this CPU is already covered by some other policy */
@@ -218,10 +218,9 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
* OPP layer will be taking care of regulators now, but it needs to know
* the name of the regulator first.
*/
- reg_name = find_supply_name(cpu_dev);
- if (reg_name) {
- priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, ®_name,
- 1);
+ reg_name[0] = find_supply_name(cpu_dev);
+ if (reg_name[0]) {
+ priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, reg_name);
if (IS_ERR(priv->opp_table)) {
ret = PTR_ERR(priv->opp_table);
if (ret != -EPROBE_DEFER)
diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
index 8f9fdd864391..560d67a6bef1 100644
--- a/drivers/cpufreq/ti-cpufreq.c
+++ b/drivers/cpufreq/ti-cpufreq.c
@@ -173,7 +173,7 @@ static struct ti_cpufreq_soc_data omap34xx_soc_data = {
* seems to always read as 0).
*/
-static const char * const omap3_reg_names[] = {"cpu0", "vbb"};
+static const char * const omap3_reg_names[] = {"cpu0", "vbb", NULL};
static struct ti_cpufreq_soc_data omap36xx_soc_data = {
.reg_names = omap3_reg_names,
@@ -326,7 +326,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
const struct of_device_id *match;
struct opp_table *ti_opp_table;
struct ti_cpufreq_data *opp_data;
- const char * const default_reg_names[] = {"vdd", "vbb"};
+ const char * const default_reg_names[] = {"vdd", "vbb", NULL};
int ret;
match = dev_get_platdata(&pdev->dev);
@@ -387,8 +387,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
if (opp_data->soc_data->reg_names)
reg_names = opp_data->soc_data->reg_names;
ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
- reg_names,
- ARRAY_SIZE(default_reg_names));
+ reg_names);
if (IS_ERR(ti_opp_table)) {
dev_pm_opp_put_supported_hw(opp_data->opp_table);
ret = PTR_ERR(ti_opp_table);
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index e689101abc93..541baff93ee8 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -180,10 +180,10 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
{
struct device *dev = bus->dev;
struct opp_table *opp_table;
- const char *vdd = "vdd";
+ const char *supplies[] = { "vdd", NULL };
int i, ret, count, size;
- opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
+ opp_table = dev_pm_opp_set_regulators(dev, supplies);
if (IS_ERR(opp_table)) {
ret = PTR_ERR(opp_table);
dev_err(dev, "failed to set regulators %d\n", ret);
diff --git a/drivers/gpu/drm/lima/lima_devfreq.c b/drivers/gpu/drm/lima/lima_devfreq.c
index 8989e215dfc9..dc83c5421125 100644
--- a/drivers/gpu/drm/lima/lima_devfreq.c
+++ b/drivers/gpu/drm/lima/lima_devfreq.c
@@ -111,6 +111,7 @@ int lima_devfreq_init(struct lima_device *ldev)
struct dev_pm_opp *opp;
unsigned long cur_freq;
int ret;
+ const char *regulator_names[] = { "mali", NULL };
if (!device_property_present(dev, "operating-points-v2"))
/* Optional, continue without devfreq */
@@ -122,7 +123,7 @@ int lima_devfreq_init(struct lima_device *ldev)
if (ret)
return ret;
- ret = devm_pm_opp_set_regulators(dev, (const char *[]){ "mali" }, 1);
+ ret = devm_pm_opp_set_regulators(dev, regulator_names);
if (ret) {
/* Continue if the optional regulator is missing */
if (ret != -ENODEV)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 194af7f607a6..5110cd9b2425 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -101,8 +101,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
return 0;
}
- ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
- pfdev->comp->num_supplies);
+ ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names);
if (ret) {
/* Continue if the optional regulator is missing */
if (ret != -ENODEV) {
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 7fcbc2a5b6cd..8a4bef65d38c 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -625,24 +625,29 @@ static int panfrost_remove(struct platform_device *pdev)
return 0;
}
-static const char * const default_supplies[] = { "mali" };
+/*
+ * The OPP core wants the supply names to be NULL terminated, but we need the
+ * correct num_supplies value for regulator core. Hence, we NULL terminate here
+ * and then initialize num_supplies with ARRAY_SIZE - 1.
+ */
+static const char * const default_supplies[] = { "mali", NULL };
static const struct panfrost_compatible default_data = {
- .num_supplies = ARRAY_SIZE(default_supplies),
+ .num_supplies = ARRAY_SIZE(default_supplies) - 1,
.supply_names = default_supplies,
.num_pm_domains = 1, /* optional */
.pm_domain_names = NULL,
};
static const struct panfrost_compatible amlogic_data = {
- .num_supplies = ARRAY_SIZE(default_supplies),
+ .num_supplies = ARRAY_SIZE(default_supplies) - 1,
.supply_names = default_supplies,
.vendor_quirk = panfrost_gpu_amlogic_quirk,
};
-static const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
+static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
static const struct panfrost_compatible mediatek_mt8183_data = {
- .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
+ .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
.supply_names = mediatek_mt8183_supplies,
.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
.pm_domain_names = mediatek_mt8183_pm_domains,
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index e166bfe5fc90..4e4593957ec5 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -2105,13 +2105,20 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name);
* This must be called before any OPPs are initialized for the device.
*/
struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
- const char * const names[],
- unsigned int count)
+ const char * const names[])
{
struct dev_pm_opp_supply *supplies;
+ const char * const *temp = names;
struct opp_table *opp_table;
struct regulator *reg;
- int ret, i;
+ int count = 0, ret, i;
+
+ /* Count number of regulators */
+ while (*temp++)
+ count++;
+
+ if (!count)
+ return ERR_PTR(-EINVAL);
opp_table = _add_opp_table(dev, false);
if (IS_ERR(opp_table))
@@ -2236,12 +2243,11 @@ static void devm_pm_opp_regulators_release(void *data)
* Return: 0 on success and errorno otherwise.
*/
int devm_pm_opp_set_regulators(struct device *dev,
- const char * const names[],
- unsigned int count)
+ const char * const names[])
{
struct opp_table *opp_table;
- opp_table = dev_pm_opp_set_regulators(dev, names, count);
+ opp_table = dev_pm_opp_set_regulators(dev, names);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 5611d14d3ba2..6a4b8f7e7948 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -1384,7 +1384,7 @@ tegra_pmc_core_pd_opp_to_performance_state(struct generic_pm_domain *genpd,
static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
{
struct generic_pm_domain *genpd;
- const char *rname = "core";
+ const char *rname[] = { "core", NULL};
int err;
genpd = devm_kzalloc(pmc->dev, sizeof(*genpd), GFP_KERNEL);
@@ -1395,7 +1395,7 @@ static int tegra_pmc_core_pd_add(struct tegra_pmc *pmc, struct device_node *np)
genpd->set_performance_state = tegra_pmc_core_pd_set_performance_state;
genpd->opp_to_performance_state = tegra_pmc_core_pd_opp_to_performance_state;
- err = devm_pm_opp_set_regulators(pmc->dev, &rname, 1);
+ err = devm_pm_opp_set_regulators(pmc->dev, rname);
if (err)
return dev_err_probe(pmc->dev, err,
"failed to set core OPP regulator\n");
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 6708b4ec244d..4c490865d574 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -159,9 +159,9 @@ void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
int devm_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
-struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
+struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[]);
void dev_pm_opp_put_regulators(struct opp_table *opp_table);
-int devm_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
+int devm_pm_opp_set_regulators(struct device *dev, const char * const names[]);
struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name);
void dev_pm_opp_put_clkname(struct opp_table *opp_table);
int devm_pm_opp_set_clkname(struct device *dev, const char *name);
@@ -379,7 +379,7 @@ static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, con
static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
-static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
+static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[])
{
return ERR_PTR(-EOPNOTSUPP);
}
@@ -387,8 +387,7 @@ static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, co
static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
static inline int devm_pm_opp_set_regulators(struct device *dev,
- const char * const names[],
- unsigned int count)
+ const char * const names[])
{
return -EOPNOTSUPP;
}
--
2.31.1.272.g89b43f80a514
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^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH V3.1 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-06 8:18 ` [PATCH V3.1 " Viresh Kumar
@ 2022-07-06 9:50 ` Steven Price
0 siblings, 0 replies; 14+ messages in thread
From: Steven Price @ 2022-07-06 9:50 UTC (permalink / raw)
To: Viresh Kumar, Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Qiang Yu,
Rob Herring, Tomeu Vizoso, Alyssa Rosenzweig, Nishanth Menon,
Stephen Boyd, Thierry Reding, Jonathan Hunter, Matthias Brugger
Cc: linux-pm, Vincent Guittot, Greg Kroah-Hartman, linux-kernel,
linux-samsung-soc, linux-arm-kernel, dri-devel, lima, linux-tegra,
linux-mediatek
On 06/07/2022 09:18, Viresh Kumar wrote:
> Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
> instead of making the callers keep the two parameters in sync, which
> creates an opportunity for bugs to get in.
>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> V3->V3.1:
> - Update panfrost_drv.c to include the NULL element.
>
> drivers/cpufreq/cpufreq-dt.c | 9 ++++-----
> drivers/cpufreq/ti-cpufreq.c | 7 +++----
> drivers/devfreq/exynos-bus.c | 4 ++--
> drivers/gpu/drm/lima/lima_devfreq.c | 3 ++-
> drivers/gpu/drm/panfrost/panfrost_devfreq.c | 3 +--
> drivers/gpu/drm/panfrost/panfrost_drv.c | 15 ++++++++++-----
> drivers/opp/core.c | 18 ++++++++++++------
> drivers/soc/tegra/pmc.c | 4 ++--
> include/linux/pm_opp.h | 9 ++++-----
> 9 files changed, 40 insertions(+), 32 deletions(-)
>
[...]
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> index 194af7f607a6..5110cd9b2425 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> @@ -101,8 +101,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
> return 0;
> }
>
> - ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
> - pfdev->comp->num_supplies);
> + ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names);
> if (ret) {
> /* Continue if the optional regulator is missing */
> if (ret != -ENODEV) {
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 7fcbc2a5b6cd..8a4bef65d38c 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -625,24 +625,29 @@ static int panfrost_remove(struct platform_device *pdev)
> return 0;
> }
>
> -static const char * const default_supplies[] = { "mali" };
> +/*
> + * The OPP core wants the supply names to be NULL terminated, but we need the
> + * correct num_supplies value for regulator core. Hence, we NULL terminate here
> + * and then initialize num_supplies with ARRAY_SIZE - 1.
> + */
> +static const char * const default_supplies[] = { "mali", NULL };
> static const struct panfrost_compatible default_data = {
> - .num_supplies = ARRAY_SIZE(default_supplies),
> + .num_supplies = ARRAY_SIZE(default_supplies) - 1,
> .supply_names = default_supplies,
> .num_pm_domains = 1, /* optional */
> .pm_domain_names = NULL,
> };
>
> static const struct panfrost_compatible amlogic_data = {
> - .num_supplies = ARRAY_SIZE(default_supplies),
> + .num_supplies = ARRAY_SIZE(default_supplies) - 1,
> .supply_names = default_supplies,
> .vendor_quirk = panfrost_gpu_amlogic_quirk,
> };
>
> -static const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
> +static const char * const mediatek_mt8183_supplies[] = { "mali", "sram", NULL };
> static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
> static const struct panfrost_compatible mediatek_mt8183_data = {
> - .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
> + .num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies) - 1,
> .supply_names = mediatek_mt8183_supplies,
> .num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
> .pm_domain_names = mediatek_mt8183_pm_domains,
Reviewed-by: Steven Price <steven.price@arm.com>
Thanks for the rework, much cleaner.
Steve
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
2022-07-04 14:35 ` Steven Price
2022-07-06 8:18 ` [PATCH V3.1 " Viresh Kumar
@ 2022-07-07 19:04 ` Chanwoo Choi
2 siblings, 0 replies; 14+ messages in thread
From: Chanwoo Choi @ 2022-07-07 19:04 UTC (permalink / raw)
To: Viresh Kumar, Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Qiang Yu,
Rob Herring, Tomeu Vizoso, Steven Price, Alyssa Rosenzweig,
Nishanth Menon, Stephen Boyd, Thierry Reding, Jonathan Hunter
Cc: linux-pm, Vincent Guittot, Greg Kroah-Hartman, linux-kernel,
linux-samsung-soc, linux-arm-kernel, dri-devel, lima, linux-tegra
On 22. 7. 4. 21:07, Viresh Kumar wrote:
> Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
> instead of making the callers keep the two parameters in sync, which
> creates an opportunity for bugs to get in.
>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> drivers/cpufreq/cpufreq-dt.c | 9 ++++-----
> drivers/cpufreq/ti-cpufreq.c | 7 +++----
> drivers/devfreq/exynos-bus.c | 4 ++--
> drivers/gpu/drm/lima/lima_devfreq.c | 3 ++-
> drivers/gpu/drm/panfrost/panfrost_devfreq.c | 4 ++--
> drivers/opp/core.c | 18 ++++++++++++------
> drivers/soc/tegra/pmc.c | 4 ++--
> include/linux/pm_opp.h | 9 ++++-----
> 8 files changed, 31 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
> index 8fcaba541539..be0c19b3ffa5 100644
> --- a/drivers/cpufreq/cpufreq-dt.c
> +++ b/drivers/cpufreq/cpufreq-dt.c
> @@ -193,7 +193,7 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
> struct private_data *priv;
> struct device *cpu_dev;
> bool fallback = false;
> - const char *reg_name;
> + const char *reg_name[] = { NULL, NULL };
> int ret;
>
> /* Check if this CPU is already covered by some other policy */
> @@ -218,10 +218,9 @@ static int dt_cpufreq_early_init(struct device *dev, int cpu)
> * OPP layer will be taking care of regulators now, but it needs to know
> * the name of the regulator first.
> */
> - reg_name = find_supply_name(cpu_dev);
> - if (reg_name) {
> - priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, ®_name,
> - 1);
> + reg_name[0] = find_supply_name(cpu_dev);
> + if (reg_name[0]) {
> + priv->opp_table = dev_pm_opp_set_regulators(cpu_dev, reg_name);
> if (IS_ERR(priv->opp_table)) {
> ret = PTR_ERR(priv->opp_table);
> if (ret != -EPROBE_DEFER)
> diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
> index 8f9fdd864391..560d67a6bef1 100644
> --- a/drivers/cpufreq/ti-cpufreq.c
> +++ b/drivers/cpufreq/ti-cpufreq.c
> @@ -173,7 +173,7 @@ static struct ti_cpufreq_soc_data omap34xx_soc_data = {
> * seems to always read as 0).
> */
>
> -static const char * const omap3_reg_names[] = {"cpu0", "vbb"};
> +static const char * const omap3_reg_names[] = {"cpu0", "vbb", NULL};
>
> static struct ti_cpufreq_soc_data omap36xx_soc_data = {
> .reg_names = omap3_reg_names,
> @@ -326,7 +326,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
> const struct of_device_id *match;
> struct opp_table *ti_opp_table;
> struct ti_cpufreq_data *opp_data;
> - const char * const default_reg_names[] = {"vdd", "vbb"};
> + const char * const default_reg_names[] = {"vdd", "vbb", NULL};
> int ret;
>
> match = dev_get_platdata(&pdev->dev);
> @@ -387,8 +387,7 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
> if (opp_data->soc_data->reg_names)
> reg_names = opp_data->soc_data->reg_names;
> ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
> - reg_names,
> - ARRAY_SIZE(default_reg_names));
> + reg_names);
> if (IS_ERR(ti_opp_table)) {
> dev_pm_opp_put_supported_hw(opp_data->opp_table);
> ret = PTR_ERR(ti_opp_table);
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index e689101abc93..541baff93ee8 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -180,10 +180,10 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> {
> struct device *dev = bus->dev;
> struct opp_table *opp_table;
> - const char *vdd = "vdd";
> + const char *supplies[] = { "vdd", NULL };
> int i, ret, count, size;
>
> - opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
> + opp_table = dev_pm_opp_set_regulators(dev, supplies);
> if (IS_ERR(opp_table)) {
> ret = PTR_ERR(opp_table);
> dev_err(dev, "failed to set regulators %d\n", ret);
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
(snip)
--
Best Regards,
Samsung Electronics
Chanwoo Choi
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH V3 10/20] OPP: Migrate set-regulators API to use set-config helpers
2022-07-04 12:07 ` [PATCH V3 10/20] OPP: Migrate set-regulators API to use set-config helpers Viresh Kumar
@ 2022-07-07 19:29 ` Chanwoo Choi
0 siblings, 0 replies; 14+ messages in thread
From: Chanwoo Choi @ 2022-07-07 19:29 UTC (permalink / raw)
To: Viresh Kumar, Rafael J. Wysocki, Chanwoo Choi, MyungJoo Ham,
Kyungmin Park, Krzysztof Kozlowski, Alim Akhtar, Nishanth Menon,
Stephen Boyd
Cc: linux-pm, Vincent Guittot, linux-kernel, linux-samsung-soc,
linux-arm-kernel
On 22. 7. 4. 21:07, Viresh Kumar wrote:
> Now that we have a central API to handle all OPP table configurations,
> migrate the set-regulators family of helpers to use the new
> infrastructure.
>
> The return type and parameter to the APIs change a bit due to this,
> update the current users as well in the same commit in order to avoid
> breaking builds.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> drivers/cpufreq/cpufreq-dt.c | 12 ++---
> drivers/devfreq/exynos-bus.c | 19 +++-----
> drivers/opp/core.c | 91 ++++++++----------------------------
> include/linux/pm_opp.h | 44 ++++++++++-------
> 4 files changed, 60 insertions(+), 106 deletions(-)
>
(snip)
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index 541baff93ee8..d1235242367f 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -33,7 +33,7 @@ struct exynos_bus {
>
> unsigned long curr_freq;
>
> - struct opp_table *opp_table;
> + int opp_token;
> struct clk *clk;
> unsigned int ratio;
> };
> @@ -161,8 +161,7 @@ static void exynos_bus_exit(struct device *dev)
>
> dev_pm_opp_of_remove_table(dev);
> clk_disable_unprepare(bus->clk);
> - dev_pm_opp_put_regulators(bus->opp_table);
> - bus->opp_table = NULL;
> + dev_pm_opp_put_regulators(bus->opp_token);
> }
>
> static void exynos_bus_passive_exit(struct device *dev)
> @@ -179,18 +178,16 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> struct exynos_bus *bus)
> {
> struct device *dev = bus->dev;
> - struct opp_table *opp_table;
> const char *supplies[] = { "vdd", NULL };
> int i, ret, count, size;
>
> - opp_table = dev_pm_opp_set_regulators(dev, supplies);
> - if (IS_ERR(opp_table)) {
> - ret = PTR_ERR(opp_table);
> + ret = dev_pm_opp_set_regulators(dev, supplies);
> + if (ret < 0) {
> dev_err(dev, "failed to set regulators %d\n", ret);
> return ret;
> }
>
> - bus->opp_table = opp_table;
> + bus->opp_token = ret;
>
> /*
> * Get the devfreq-event devices to get the current utilization of
> @@ -236,8 +233,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> return 0;
>
> err_regulator:
> - dev_pm_opp_put_regulators(bus->opp_table);
> - bus->opp_table = NULL;
> + dev_pm_opp_put_regulators(bus->opp_token);
>
> return ret;
> }
> @@ -459,8 +455,7 @@ static int exynos_bus_probe(struct platform_device *pdev)
> dev_pm_opp_of_remove_table(dev);
> clk_disable_unprepare(bus->clk);
> err_reg:
> - dev_pm_opp_put_regulators(bus->opp_table);
> - bus->opp_table = NULL;
> + dev_pm_opp_put_regulators(bus->opp_token);
>
> return ret;
> }
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Thanks.
(snip)
--
Best Regards,
Samsung Electronics
Chanwoo Choi
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2022-07-07 19:31 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-07-04 12:07 [PATCH V3 00/20] OPP: Add new configuration interface: dev_pm_opp_set_config() Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 02/20] OPP: Make dev_pm_opp_set_regulators() accept NULL terminated list Viresh Kumar
2022-07-04 14:35 ` Steven Price
2022-07-05 4:34 ` Viresh Kumar
2022-07-06 8:09 ` Steven Price
2022-07-06 8:18 ` [PATCH V3.1 " Viresh Kumar
2022-07-06 9:50 ` Steven Price
2022-07-07 19:04 ` [PATCH V3 " Chanwoo Choi
2022-07-04 12:07 ` [PATCH V3 05/20] cpufreq: sti: Migrate to dev_pm_opp_set_config() Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 10/20] OPP: Migrate set-regulators API to use set-config helpers Viresh Kumar
2022-07-07 19:29 ` Chanwoo Choi
2022-07-04 12:07 ` [PATCH V3 11/20] OPP: Migrate set-supported-hw " Viresh Kumar
2022-07-04 12:07 ` [PATCH V3 15/20] OPP: Migrate set-prop-name helper " Viresh Kumar
2022-07-04 18:59 ` Samuel Holland
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