[PATCH 00/18] Remove pm_power_off use in drivers/power/reset

[PATCH 00/18] Remove pm_power_off use in drivers/power/reset

[Andrew Davis]

Hello all,

Use of pm_power_off is considered legacy and should be replaced with
register_sys_off*(). Same for register_restart_handler(). Do this
for the drivers/power/reset subsystem for all trivial cases.

Thanks,
Andrew

Andrew Davis (18):
  power: reset: atc260x-poweroff: Use
    devm_register_sys_off_handler(RESTART)
  power: reset: atc260x-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: xgene-reboot: Use devm_register_sys_off_handler(RESTART)
  power: reset: tps65086-restart: Use
    devm_register_sys_off_handler(RESTART)
  power: reset: tps65086-restart: Remove unneeded device data struct
  power: reset: brcm-kona-reset: Use
    devm_register_sys_off_handler(RESTART)
  power: reset: axxia-reset: Use devm_register_sys_off_handler(RESTART)
  power: reset: rmobile-reset: Use devm_platform_ioremap_resource()
    helper
  power: reset: rmobile-reset: Use
    devm_register_sys_off_handler(RESTART)
  power: reset: mt6323-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: msm-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: msm-poweroff: Use devm_register_sys_off_handler(RESTART)
  power: reset: regulator-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: as3722-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: gemini-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: restart-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)
  power: reset: syscon-poweroff: Move device data into a struct
  power: reset: syscon-poweroff: Use
    devm_register_sys_off_handler(POWER_OFF)

 drivers/power/reset/as3722-poweroff.c    | 30 ++++-------
 drivers/power/reset/atc260x-poweroff.c   | 55 ++++++++------------
 drivers/power/reset/axxia-reset.c        | 16 +++---
 drivers/power/reset/brcm-kona-reset.c    | 18 +++----
 drivers/power/reset/gemini-poweroff.c    | 16 +++---
 drivers/power/reset/msm-poweroff.c       | 25 ++++-----
 drivers/power/reset/mt6323-poweroff.c    | 28 +++++-----
 drivers/power/reset/regulator-poweroff.c | 36 +++++--------
 drivers/power/reset/restart-poweroff.c   | 25 +++------
 drivers/power/reset/rmobile-reset.c      | 38 +++++---------
 drivers/power/reset/syscon-poweroff.c    | 66 ++++++++++++------------
 drivers/power/reset/tps65086-restart.c   | 58 ++++-----------------
 drivers/power/reset/xgene-reboot.c       | 13 ++---
 13 files changed, 158 insertions(+), 266 deletions(-)

-- 
2.39.2


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[PATCH 01/18] power: reset: atc260x-poweroff: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/atc260x-poweroff.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/power/reset/atc260x-poweroff.c b/drivers/power/reset/atc260x-poweroff.c
index b4aa50e9685e1..ce2748d3282c3 100644
--- a/drivers/power/reset/atc260x-poweroff.c
+++ b/drivers/power/reset/atc260x-poweroff.c
@@ -16,7 +16,6 @@
 struct atc260x_pwrc {
 	struct device *dev;
 	struct regmap *regmap;
-	struct notifier_block restart_nb;
 	int (*do_poweroff)(const struct atc260x_pwrc *pwrc, bool restart);
 };
 
@@ -172,11 +171,9 @@ static void atc260x_pwrc_pm_handler(void)
 	WARN_ONCE(1, "Unable to power off system\n");
 }
 
-static int atc260x_pwrc_restart_handler(struct notifier_block *nb,
-					unsigned long mode, void *cmd)
+static int atc260x_pwrc_restart_handler(struct sys_off_data *data)
 {
-	struct atc260x_pwrc *pwrc = container_of(nb, struct atc260x_pwrc,
-						 restart_nb);
+	struct atc260x_pwrc *pwrc = data->cb_data;
 	pwrc->do_poweroff(pwrc, true);
 
 	return NOTIFY_DONE;
@@ -194,8 +191,6 @@ static int atc260x_pwrc_probe(struct platform_device *pdev)
 
 	priv->dev = &pdev->dev;
 	priv->regmap = atc260x->regmap;
-	priv->restart_nb.notifier_call = atc260x_pwrc_restart_handler;
-	priv->restart_nb.priority = 192;
 
 	switch (atc260x->ic_type) {
 	case ATC2603C:
@@ -225,7 +220,11 @@ static int atc260x_pwrc_probe(struct platform_device *pdev)
 		dev_warn(priv->dev, "Poweroff callback already assigned\n");
 	}
 
-	ret = register_restart_handler(&priv->restart_nb);
+	ret = devm_register_sys_off_handler(priv->dev,
+					    SYS_OFF_MODE_RESTART,
+					    SYS_OFF_PRIO_HIGH,
+					    atc260x_pwrc_restart_handler,
+					    priv);
 	if (ret)
 		dev_err(priv->dev, "failed to register restart handler: %d\n",
 			ret);
@@ -241,8 +240,6 @@ static void atc260x_pwrc_remove(struct platform_device *pdev)
 		pm_power_off = NULL;
 		atc260x_pwrc_data = NULL;
 	}
-
-	unregister_restart_handler(&priv->restart_nb);
 }
 
 static struct platform_driver atc260x_pwrc_driver = {
-- 
2.39.2


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[PATCH 02/18] power: reset: atc260x-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/atc260x-poweroff.c | 38 ++++++++++----------------
 1 file changed, 14 insertions(+), 24 deletions(-)

diff --git a/drivers/power/reset/atc260x-poweroff.c b/drivers/power/reset/atc260x-poweroff.c
index ce2748d3282c3..e3e4621ccb1dd 100644
--- a/drivers/power/reset/atc260x-poweroff.c
+++ b/drivers/power/reset/atc260x-poweroff.c
@@ -19,9 +19,6 @@ struct atc260x_pwrc {
 	int (*do_poweroff)(const struct atc260x_pwrc *pwrc, bool restart);
 };
 
-/* Global variable needed only for pm_power_off */
-static struct atc260x_pwrc *atc260x_pwrc_data;
-
 static int atc2603c_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart)
 {
 	int ret, deep_sleep = 0;
@@ -164,11 +161,15 @@ static int atc2609a_init(const struct atc260x_pwrc *pwrc)
 	return ret;
 }
 
-static void atc260x_pwrc_pm_handler(void)
+static int atc260x_pwrc_pm_handler(struct sys_off_data *data)
 {
-	atc260x_pwrc_data->do_poweroff(atc260x_pwrc_data, false);
+	struct atc260x_pwrc *pwrc = data->cb_data;
+
+	pwrc->do_poweroff(pwrc, false);
 
 	WARN_ONCE(1, "Unable to power off system\n");
+
+	return NOTIFY_DONE;
 }
 
 static int atc260x_pwrc_restart_handler(struct sys_off_data *data)
@@ -211,14 +212,14 @@ static int atc260x_pwrc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	platform_set_drvdata(pdev, priv);
-
-	if (!pm_power_off) {
-		atc260x_pwrc_data = priv;
-		pm_power_off = atc260x_pwrc_pm_handler;
-	} else {
-		dev_warn(priv->dev, "Poweroff callback already assigned\n");
-	}
+	ret = devm_register_sys_off_handler(priv->dev,
+					    SYS_OFF_MODE_POWER_OFF,
+					    SYS_OFF_PRIO_DEFAULT,
+					    atc260x_pwrc_pm_handler,
+					    priv);
+	if (ret)
+		dev_err(priv->dev, "failed to register power-off handler: %d\n",
+			ret);
 
 	ret = devm_register_sys_off_handler(priv->dev,
 					    SYS_OFF_MODE_RESTART,
@@ -232,19 +233,8 @@ static int atc260x_pwrc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static void atc260x_pwrc_remove(struct platform_device *pdev)
-{
-	struct atc260x_pwrc *priv = platform_get_drvdata(pdev);
-
-	if (atc260x_pwrc_data == priv) {
-		pm_power_off = NULL;
-		atc260x_pwrc_data = NULL;
-	}
-}
-
 static struct platform_driver atc260x_pwrc_driver = {
 	.probe = atc260x_pwrc_probe,
-	.remove_new = atc260x_pwrc_remove,
 	.driver = {
 		.name = "atc260x-pwrc",
 	},
-- 
2.39.2


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[PATCH 03/18] power: reset: xgene-reboot: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/xgene-reboot.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c
index c2e5a99940d37..5c923ab838a55 100644
--- a/drivers/power/reset/xgene-reboot.c
+++ b/drivers/power/reset/xgene-reboot.c
@@ -24,15 +24,11 @@ struct xgene_reboot_context {
 	struct device *dev;
 	void *csr;
 	u32 mask;
-	struct notifier_block restart_handler;
 };
 
-static int xgene_restart_handler(struct notifier_block *this,
-				 unsigned long mode, void *cmd)
+static int xgene_restart_handler(struct sys_off_data *data)
 {
-	struct xgene_reboot_context *ctx =
-		container_of(this, struct xgene_reboot_context,
-			     restart_handler);
+	struct xgene_reboot_context *ctx = data->cb_data;
 
 	/* Issue the reboot */
 	writel(ctx->mask, ctx->csr);
@@ -64,9 +60,8 @@ static int xgene_reboot_probe(struct platform_device *pdev)
 		ctx->mask = 0xFFFFFFFF;
 
 	ctx->dev = dev;
-	ctx->restart_handler.notifier_call = xgene_restart_handler;
-	ctx->restart_handler.priority = 128;
-	err = register_restart_handler(&ctx->restart_handler);
+	err = devm_register_sys_off_handler(dev, SYS_OFF_MODE_RESTART, 128,
+					    xgene_restart_handler, ctx);
 	if (err) {
 		iounmap(ctx->csr);
 		dev_err(dev, "cannot register restart handler (err=%d)\n", err);
-- 
2.39.2


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[PATCH 04/18] power: reset: tps65086-restart: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/tps65086-restart.c | 35 ++++++--------------------
 1 file changed, 7 insertions(+), 28 deletions(-)

diff --git a/drivers/power/reset/tps65086-restart.c b/drivers/power/reset/tps65086-restart.c
index ee8e9f4b837ea..82d7a761a0385 100644
--- a/drivers/power/reset/tps65086-restart.c
+++ b/drivers/power/reset/tps65086-restart.c
@@ -10,15 +10,12 @@
 #include <linux/reboot.h>
 
 struct tps65086_restart {
-	struct notifier_block handler;
 	struct device *dev;
 };
 
-static int tps65086_restart_notify(struct notifier_block *this,
-				   unsigned long mode, void *cmd)
+static int tps65086_restart_notify(struct sys_off_data *data)
 {
-	struct tps65086_restart *tps65086_restart =
-		container_of(this, struct tps65086_restart, handler);
+	struct tps65086_restart *tps65086_restart = data->cb_data;
 	struct tps65086 *tps65086 = dev_get_drvdata(tps65086_restart->dev->parent);
 	int ret;
 
@@ -46,13 +43,13 @@ static int tps65086_restart_probe(struct platform_device *pdev)
 	if (!tps65086_restart)
 		return -ENOMEM;
 
-	platform_set_drvdata(pdev, tps65086_restart);
-
-	tps65086_restart->handler.notifier_call = tps65086_restart_notify;
-	tps65086_restart->handler.priority = 192;
 	tps65086_restart->dev = &pdev->dev;
 
-	ret = register_restart_handler(&tps65086_restart->handler);
+	ret = devm_register_sys_off_handler(&pdev->dev,
+					    SYS_OFF_MODE_RESTART,
+					    SYS_OFF_PRIO_HIGH,
+					    tps65086_restart_notify,
+					    tps65086_restart);
 	if (ret) {
 		dev_err(&pdev->dev, "%s: cannot register restart handler: %d\n",
 			__func__, ret);
@@ -62,23 +59,6 @@ static int tps65086_restart_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static void tps65086_restart_remove(struct platform_device *pdev)
-{
-	struct tps65086_restart *tps65086_restart = platform_get_drvdata(pdev);
-	int ret;
-
-	ret = unregister_restart_handler(&tps65086_restart->handler);
-	if (ret) {
-		/*
-		 * tps65086_restart_probe() registered the restart handler. So
-		 * unregistering should work fine. Checking the error code
-		 * shouldn't be needed, still doing it for completeness.
-		 */
-		dev_err(&pdev->dev, "%s: cannot unregister restart handler: %d\n",
-			__func__, ret);
-	}
-}
-
 static const struct platform_device_id tps65086_restart_id_table[] = {
 	{ "tps65086-reset", },
 	{ /* sentinel */ }
@@ -90,7 +70,6 @@ static struct platform_driver tps65086_restart_driver = {
 		.name = "tps65086-restart",
 	},
 	.probe = tps65086_restart_probe,
-	.remove_new = tps65086_restart_remove,
 	.id_table = tps65086_restart_id_table,
 };
 module_platform_driver(tps65086_restart_driver);
-- 
2.39.2


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[PATCH 05/18] power: reset: tps65086-restart: Remove unneeded device data struct

[Andrew Davis]

We only need one member of the struct tps65086_restart, pass that
tps65086_restart_notify() directly. Remove that struct and its
allocation.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/tps65086-restart.c | 35 ++++++--------------------
 1 file changed, 8 insertions(+), 27 deletions(-)

diff --git a/drivers/power/reset/tps65086-restart.c b/drivers/power/reset/tps65086-restart.c
index 82d7a761a0385..6976dbcac74fa 100644
--- a/drivers/power/reset/tps65086-restart.c
+++ b/drivers/power/reset/tps65086-restart.c
@@ -9,19 +9,14 @@
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
 
-struct tps65086_restart {
-	struct device *dev;
-};
-
 static int tps65086_restart_notify(struct sys_off_data *data)
 {
-	struct tps65086_restart *tps65086_restart = data->cb_data;
-	struct tps65086 *tps65086 = dev_get_drvdata(tps65086_restart->dev->parent);
+	struct tps65086 *tps65086 = data->cb_data;
 	int ret;
 
 	ret = regmap_write(tps65086->regmap, TPS65086_FORCESHUTDN, 1);
 	if (ret) {
-		dev_err(tps65086_restart->dev, "%s: error writing to tps65086 pmic: %d\n",
+		dev_err(tps65086->dev, "%s: error writing to tps65086 pmic: %d\n",
 			__func__, ret);
 		return NOTIFY_DONE;
 	}
@@ -36,27 +31,13 @@ static int tps65086_restart_notify(struct sys_off_data *data)
 
 static int tps65086_restart_probe(struct platform_device *pdev)
 {
-	struct tps65086_restart *tps65086_restart;
-	int ret;
-
-	tps65086_restart = devm_kzalloc(&pdev->dev, sizeof(*tps65086_restart), GFP_KERNEL);
-	if (!tps65086_restart)
-		return -ENOMEM;
-
-	tps65086_restart->dev = &pdev->dev;
-
-	ret = devm_register_sys_off_handler(&pdev->dev,
-					    SYS_OFF_MODE_RESTART,
-					    SYS_OFF_PRIO_HIGH,
-					    tps65086_restart_notify,
-					    tps65086_restart);
-	if (ret) {
-		dev_err(&pdev->dev, "%s: cannot register restart handler: %d\n",
-			__func__, ret);
-		return -ENODEV;
-	}
+	struct tps65086 *tps65086 = dev_get_drvdata(pdev->dev.parent);
 
-	return 0;
+	return devm_register_sys_off_handler(&pdev->dev,
+					     SYS_OFF_MODE_RESTART,
+					     SYS_OFF_PRIO_HIGH,
+					     tps65086_restart_notify,
+					     tps65086);
 }
 
 static const struct platform_device_id tps65086_restart_id_table[] = {
-- 
2.39.2


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[PATCH 06/18] power: reset: brcm-kona-reset: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/brcm-kona-reset.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/power/reset/brcm-kona-reset.c b/drivers/power/reset/brcm-kona-reset.c
index d05728b1db097..4bb956c8f24f8 100644
--- a/drivers/power/reset/brcm-kona-reset.c
+++ b/drivers/power/reset/brcm-kona-reset.c
@@ -13,11 +13,10 @@
 #define RSTMGR_WR_PASSWORD_SHIFT	8
 #define RSTMGR_WR_ACCESS_ENABLE		1
 
-static void __iomem *kona_reset_base;
-
-static int kona_reset_handler(struct notifier_block *this,
-				unsigned long mode, void *cmd)
+static int kona_reset_handler(struct sys_off_data *data)
 {
+	void __iomem *kona_reset_base = data->cb_data;
+
 	/*
 	 * A soft reset is triggered by writing a 0 to bit 0 of the soft reset
 	 * register. To write to that register we must first write the password
@@ -31,18 +30,17 @@ static int kona_reset_handler(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block kona_reset_nb = {
-	.notifier_call = kona_reset_handler,
-	.priority = 128,
-};
-
 static int kona_reset_probe(struct platform_device *pdev)
 {
+	void __iomem *kona_reset_base;
+
 	kona_reset_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(kona_reset_base))
 		return PTR_ERR(kona_reset_base);
 
-	return register_restart_handler(&kona_reset_nb);
+	return devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART,
+					     128, kona_reset_handler,
+					     kona_reset_base);
 }
 
 static const struct of_device_id of_match[] = {
-- 
2.39.2


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Re: [PATCH 06/18] power: reset: brcm-kona-reset: Use devm_register_sys_off_handler(RESTART)

[kernel test robot]

Hi Andrew,

kernel test robot noticed the following build warnings:

[auto build test WARNING on sre-power-supply/for-next]
[also build test WARNING on mani-mhi/mhi-next soc/for-next linus/master v6.8-rc2 next-20240202]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Andrew-Davis/power-reset-atc260x-poweroff-Use-devm_register_sys_off_handler-RESTART/20240202-020809
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
patch link:    https://lore.kernel.org/r/20240201180102.70395-7-afd%40ti.com
patch subject: [PATCH 06/18] power: reset: brcm-kona-reset: Use devm_register_sys_off_handler(RESTART)
config: arm-randconfig-r121-20240202 (https://download.01.org/0day-ci/archive/20240202/202402022349.daHRuWLB-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20240202/202402022349.daHRuWLB-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402022349.daHRuWLB-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/power/reset/brcm-kona-reset.c:18:45: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void [noderef] __iomem *kona_reset_base @@     got void *cb_data @@
   drivers/power/reset/brcm-kona-reset.c:18:45: sparse:     expected void [noderef] __iomem *kona_reset_base
   drivers/power/reset/brcm-kona-reset.c:18:45: sparse:     got void *cb_data
>> drivers/power/reset/brcm-kona-reset.c:43:46: sparse: sparse: incorrect type in argument 5 (different address spaces) @@     expected void *cb_data @@     got void [noderef] __iomem *[assigned] kona_reset_base @@
   drivers/power/reset/brcm-kona-reset.c:43:46: sparse:     expected void *cb_data
   drivers/power/reset/brcm-kona-reset.c:43:46: sparse:     got void [noderef] __iomem *[assigned] kona_reset_base

vim +18 drivers/power/reset/brcm-kona-reset.c

    15	
    16	static int kona_reset_handler(struct sys_off_data *data)
    17	{
  > 18		void __iomem *kona_reset_base = data->cb_data;
    19	
    20		/*
    21		 * A soft reset is triggered by writing a 0 to bit 0 of the soft reset
    22		 * register. To write to that register we must first write the password
    23		 * and the enable bit in the write access enable register.
    24		 */
    25		writel((RSTMGR_WR_PASSWORD << RSTMGR_WR_PASSWORD_SHIFT) |
    26			RSTMGR_WR_ACCESS_ENABLE,
    27			kona_reset_base + RSTMGR_REG_WR_ACCESS_OFFSET);
    28		writel(0, kona_reset_base + RSTMGR_REG_CHIP_SOFT_RST_OFFSET);
    29	
    30		return NOTIFY_DONE;
    31	}
    32	
    33	static int kona_reset_probe(struct platform_device *pdev)
    34	{
    35		void __iomem *kona_reset_base;
    36	
    37		kona_reset_base = devm_platform_ioremap_resource(pdev, 0);
    38		if (IS_ERR(kona_reset_base))
    39			return PTR_ERR(kona_reset_base);
    40	
    41		return devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART,
    42						     128, kona_reset_handler,
  > 43						     kona_reset_base);
    44	}
    45	

-- 
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[PATCH 07/18] power: reset: axxia-reset: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/axxia-reset.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/power/reset/axxia-reset.c b/drivers/power/reset/axxia-reset.c
index 24946766760c3..797bf6773860e 100644
--- a/drivers/power/reset/axxia-reset.c
+++ b/drivers/power/reset/axxia-reset.c
@@ -26,11 +26,10 @@
 #define SC_EFUSE_INT_STATUS	0x180c
 #define   EFUSE_READ_DONE	(1<<31)
 
-static struct regmap *syscon;
-
-static int axxia_restart_handler(struct notifier_block *this,
-				 unsigned long mode, void *cmd)
+static int axxia_restart_handler(struct sys_off_data *data)
 {
+	struct regmap *syscon = data->cb_data;
+
 	/* Access Key (0xab) */
 	regmap_write(syscon, SC_CRIT_WRITE_KEY, 0xab);
 	/* Select internal boot from 0xffff0000 */
@@ -44,14 +43,10 @@ static int axxia_restart_handler(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block axxia_restart_nb = {
-	.notifier_call = axxia_restart_handler,
-	.priority = 128,
-};
-
 static int axxia_reset_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct regmap *syscon;
 	int err;
 
 	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
@@ -60,7 +55,8 @@ static int axxia_reset_probe(struct platform_device *pdev)
 		return PTR_ERR(syscon);
 	}
 
-	err = register_restart_handler(&axxia_restart_nb);
+	err = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART,
+					    128, axxia_restart_handler, syscon);
 	if (err)
 		dev_err(dev, "cannot register restart handler (err=%d)\n", err);
 
-- 
2.39.2


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[PATCH 08/18] power: reset: rmobile-reset: Use devm_platform_ioremap_resource() helper

[Andrew Davis]

Use device life-cycle managed ioremap function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/rmobile-reset.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/power/reset/rmobile-reset.c b/drivers/power/reset/rmobile-reset.c
index 5df9b41c68c79..29c17ed2d4de9 100644
--- a/drivers/power/reset/rmobile-reset.c
+++ b/drivers/power/reset/rmobile-reset.c
@@ -41,28 +41,23 @@ static int rmobile_reset_probe(struct platform_device *pdev)
 {
 	int error;
 
-	sysc_base2 = of_iomap(pdev->dev.of_node, 1);
-	if (!sysc_base2)
-		return -ENODEV;
+	sysc_base2 = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(sysc_base2))
+		return PTR_ERR(sysc_base2);
 
 	error = register_restart_handler(&rmobile_reset_nb);
 	if (error) {
 		dev_err(&pdev->dev,
 			"cannot register restart handler (err=%d)\n", error);
-		goto fail_unmap;
+		return error;
 	}
 
 	return 0;
-
-fail_unmap:
-	iounmap(sysc_base2);
-	return error;
 }
 
 static void rmobile_reset_remove(struct platform_device *pdev)
 {
 	unregister_restart_handler(&rmobile_reset_nb);
-	iounmap(sysc_base2);
 }
 
 static const struct of_device_id rmobile_reset_of_match[] = {
-- 
2.39.2


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[PATCH 09/18] power: reset: rmobile-reset: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/rmobile-reset.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/power/reset/rmobile-reset.c b/drivers/power/reset/rmobile-reset.c
index 29c17ed2d4de9..41e98ff33a3c3 100644
--- a/drivers/power/reset/rmobile-reset.c
+++ b/drivers/power/reset/rmobile-reset.c
@@ -19,12 +19,9 @@
 /* Reset Control Register 2 */
 #define RESCNT2_PRES	0x80000000	/* Soft power-on reset */
 
-static void __iomem *sysc_base2;
-
-static int rmobile_reset_handler(struct notifier_block *this,
-				 unsigned long mode, void *cmd)
+static int rmobile_reset_handler(struct sys_off_data *data)
 {
-	pr_debug("%s %lu\n", __func__, mode);
+	void __iomem *sysc_base2 = data->cb_data;
 
 	/* Let's assume we have acquired the HPB semaphore */
 	writel(RESCNT2_PRES, sysc_base2 + RESCNT2);
@@ -32,20 +29,20 @@ static int rmobile_reset_handler(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block rmobile_reset_nb = {
-	.notifier_call = rmobile_reset_handler,
-	.priority = 192,
-};
-
 static int rmobile_reset_probe(struct platform_device *pdev)
 {
+	void __iomem *sysc_base2;
 	int error;
 
 	sysc_base2 = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(sysc_base2))
 		return PTR_ERR(sysc_base2);
 
-	error = register_restart_handler(&rmobile_reset_nb);
+	error = devm_register_sys_off_handler(&pdev->dev,
+					      SYS_OFF_MODE_RESTART,
+					      SYS_OFF_PRIO_HIGH,
+					      rmobile_reset_handler,
+					      sysc_base2);
 	if (error) {
 		dev_err(&pdev->dev,
 			"cannot register restart handler (err=%d)\n", error);
@@ -55,11 +52,6 @@ static int rmobile_reset_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static void rmobile_reset_remove(struct platform_device *pdev)
-{
-	unregister_restart_handler(&rmobile_reset_nb);
-}
-
 static const struct of_device_id rmobile_reset_of_match[] = {
 	{ .compatible = "renesas,sysc-rmobile", },
 	{ /* sentinel */ }
@@ -68,7 +60,6 @@ MODULE_DEVICE_TABLE(of, rmobile_reset_of_match);
 
 static struct platform_driver rmobile_reset_driver = {
 	.probe = rmobile_reset_probe,
-	.remove_new = rmobile_reset_remove,
 	.driver = {
 		.name = "rmobile_reset",
 		.of_match_table = rmobile_reset_of_match,
-- 
2.39.2


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Re: [PATCH 09/18] power: reset: rmobile-reset: Use devm_register_sys_off_handler(RESTART)

[kernel test robot]

Hi Andrew,

kernel test robot noticed the following build warnings:

[auto build test WARNING on sre-power-supply/for-next]
[also build test WARNING on mani-mhi/mhi-next soc/for-next linus/master v6.8-rc2 next-20240202]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Andrew-Davis/power-reset-atc260x-poweroff-Use-devm_register_sys_off_handler-RESTART/20240202-020809
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
patch link:    https://lore.kernel.org/r/20240201180102.70395-10-afd%40ti.com
patch subject: [PATCH 09/18] power: reset: rmobile-reset: Use devm_register_sys_off_handler(RESTART)
config: hexagon-randconfig-r122-20240202 (https://download.01.org/0day-ci/archive/20240203/202402031246.nZHDnDnf-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7dd790db8b77c4a833c06632e903dc4f13877a64)
reproduce: (https://download.01.org/0day-ci/archive/20240203/202402031246.nZHDnDnf-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402031246.nZHDnDnf-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/power/reset/rmobile-reset.c:24:40: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void [noderef] __iomem *sysc_base2 @@     got void *cb_data @@
   drivers/power/reset/rmobile-reset.c:24:40: sparse:     expected void [noderef] __iomem *sysc_base2
   drivers/power/reset/rmobile-reset.c:24:40: sparse:     got void *cb_data
>> drivers/power/reset/rmobile-reset.c:45:47: sparse: sparse: incorrect type in argument 5 (different address spaces) @@     expected void *cb_data @@     got void [noderef] __iomem *[assigned] sysc_base2 @@
   drivers/power/reset/rmobile-reset.c:45:47: sparse:     expected void *cb_data
   drivers/power/reset/rmobile-reset.c:45:47: sparse:     got void [noderef] __iomem *[assigned] sysc_base2

vim +24 drivers/power/reset/rmobile-reset.c

    21	
    22	static int rmobile_reset_handler(struct sys_off_data *data)
    23	{
  > 24		void __iomem *sysc_base2 = data->cb_data;
    25	
    26		/* Let's assume we have acquired the HPB semaphore */
    27		writel(RESCNT2_PRES, sysc_base2 + RESCNT2);
    28	
    29		return NOTIFY_DONE;
    30	}
    31	
    32	static int rmobile_reset_probe(struct platform_device *pdev)
    33	{
    34		void __iomem *sysc_base2;
    35		int error;
    36	
    37		sysc_base2 = devm_platform_ioremap_resource(pdev, 0);
    38		if (IS_ERR(sysc_base2))
    39			return PTR_ERR(sysc_base2);
    40	
    41		error = devm_register_sys_off_handler(&pdev->dev,
    42						      SYS_OFF_MODE_RESTART,
    43						      SYS_OFF_PRIO_HIGH,
    44						      rmobile_reset_handler,
  > 45						      sysc_base2);
    46		if (error) {
    47			dev_err(&pdev->dev,
    48				"cannot register restart handler (err=%d)\n", error);
    49			return error;
    50		}
    51	
    52		return 0;
    53	}
    54	

-- 
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[PATCH 10/18] power: reset: mt6323-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/mt6323-poweroff.c | 28 ++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/power/reset/mt6323-poweroff.c b/drivers/power/reset/mt6323-poweroff.c
index 57a63c0ab7fb7..ca5d11b17ff03 100644
--- a/drivers/power/reset/mt6323-poweroff.c
+++ b/drivers/power/reset/mt6323-poweroff.c
@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>
 #include <linux/mfd/mt6397/core.h>
 #include <linux/mfd/mt6397/rtc.h>
+#include <linux/reboot.h>
 
 struct mt6323_pwrc {
 	struct device *dev;
@@ -21,11 +22,9 @@ struct mt6323_pwrc {
 	u32 base;
 };
 
-static struct mt6323_pwrc *mt_pwrc;
-
-static void mt6323_do_pwroff(void)
+static int mt6323_do_pwroff(struct sys_off_data *data)
 {
-	struct mt6323_pwrc *pwrc = mt_pwrc;
+	struct mt6323_pwrc *pwrc = data->cb_data;
 	unsigned int val;
 	int ret;
 
@@ -44,6 +43,8 @@ static void mt6323_do_pwroff(void)
 	mdelay(1000);
 
 	WARN_ONCE(1, "Unable to power off system\n");
+
+	return NOTIFY_DONE;
 }
 
 static int mt6323_pwrc_probe(struct platform_device *pdev)
@@ -51,6 +52,7 @@ static int mt6323_pwrc_probe(struct platform_device *pdev)
 	struct mt6397_chip *mt6397_chip = dev_get_drvdata(pdev->dev.parent);
 	struct mt6323_pwrc *pwrc;
 	struct resource *res;
+	int ret;
 
 	pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL);
 	if (!pwrc)
@@ -63,19 +65,20 @@ static int mt6323_pwrc_probe(struct platform_device *pdev)
 	pwrc->base = res->start;
 	pwrc->regmap = mt6397_chip->regmap;
 	pwrc->dev = &pdev->dev;
-	mt_pwrc = pwrc;
 
-	pm_power_off = &mt6323_do_pwroff;
+	ret = devm_register_sys_off_handler(pwrc->dev,
+					    SYS_OFF_MODE_POWER_OFF,
+					    SYS_OFF_PRIO_DEFAULT,
+					    mt6323_do_pwroff,
+					    pwrc);
+	if (ret) {
+		dev_err(pwrc->dev, "failed to register power-off handler: %d\n", ret);
+		return ret;
+	}
 
 	return 0;
 }
 
-static void mt6323_pwrc_remove(struct platform_device *pdev)
-{
-	if (pm_power_off == &mt6323_do_pwroff)
-		pm_power_off = NULL;
-}
-
 static const struct of_device_id mt6323_pwrc_dt_match[] = {
 	{ .compatible = "mediatek,mt6323-pwrc" },
 	{},
@@ -84,7 +87,6 @@ MODULE_DEVICE_TABLE(of, mt6323_pwrc_dt_match);
 
 static struct platform_driver mt6323_pwrc_driver = {
 	.probe          = mt6323_pwrc_probe,
-	.remove_new     = mt6323_pwrc_remove,
 	.driver         = {
 		.name   = "mt6323-pwrc",
 		.of_match_table = mt6323_pwrc_dt_match,
-- 
2.39.2


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[PATCH 11/18] power: reset: msm-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use this helper to register sys_off handler. Drivers should move away from
setting pm_power_off directly as it only allows for one handler. The new
way allows for trying multiple if the first one doesn't work.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/msm-poweroff.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/power/reset/msm-poweroff.c b/drivers/power/reset/msm-poweroff.c
index d96d248a6e25b..bcf04491e7022 100644
--- a/drivers/power/reset/msm-poweroff.c
+++ b/drivers/power/reset/msm-poweroff.c
@@ -28,9 +28,11 @@ static struct notifier_block restart_nb = {
 	.priority = 128,
 };
 
-static void do_msm_poweroff(void)
+static int do_msm_poweroff(struct sys_off_data *data)
 {
 	deassert_pshold(&restart_nb, 0, NULL);
+
+	return NOTIFY_DONE;
 }
 
 static int msm_restart_probe(struct platform_device *pdev)
@@ -41,7 +43,9 @@ static int msm_restart_probe(struct platform_device *pdev)
 
 	register_restart_handler(&restart_nb);
 
-	pm_power_off = do_msm_poweroff;
+	devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF,
+				      SYS_OFF_PRIO_DEFAULT, do_msm_poweroff,
+				      msm_ps_hold);
 
 	return 0;
 }
-- 
2.39.2


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[PATCH 12/18] power: reset: msm-poweroff: Use devm_register_sys_off_handler(RESTART)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/msm-poweroff.c | 23 ++++++-----------------
 1 file changed, 6 insertions(+), 17 deletions(-)

diff --git a/drivers/power/reset/msm-poweroff.c b/drivers/power/reset/msm-poweroff.c
index bcf04491e7022..c5831c46f69e2 100644
--- a/drivers/power/reset/msm-poweroff.c
+++ b/drivers/power/reset/msm-poweroff.c
@@ -13,35 +13,24 @@
 #include <linux/reboot.h>
 #include <linux/pm.h>
 
-static void __iomem *msm_ps_hold;
-static int deassert_pshold(struct notifier_block *nb, unsigned long action,
-			   void *data)
+static int do_msm_poweroff(struct sys_off_data *data)
 {
+	void __iomem *msm_ps_hold = data->cb_data;
+
 	writel(0, msm_ps_hold);
 	mdelay(10000);
 
 	return NOTIFY_DONE;
 }
 
-static struct notifier_block restart_nb = {
-	.notifier_call = deassert_pshold,
-	.priority = 128,
-};
-
-static int do_msm_poweroff(struct sys_off_data *data)
-{
-	deassert_pshold(&restart_nb, 0, NULL);
-
-	return NOTIFY_DONE;
-}
-
 static int msm_restart_probe(struct platform_device *pdev)
 {
-	msm_ps_hold = devm_platform_ioremap_resource(pdev, 0);
+	void __iomem *msm_ps_hold = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(msm_ps_hold))
 		return PTR_ERR(msm_ps_hold);
 
-	register_restart_handler(&restart_nb);
+	devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART,
+				      128, do_msm_poweroff, msm_ps_hold);
 
 	devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF,
 				      SYS_OFF_PRIO_DEFAULT, do_msm_poweroff,
-- 
2.39.2


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[PATCH 13/18] power: reset: regulator-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/regulator-poweroff.c | 36 +++++++++---------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/drivers/power/reset/regulator-poweroff.c b/drivers/power/reset/regulator-poweroff.c
index 15160809c423a..fed4978e38580 100644
--- a/drivers/power/reset/regulator-poweroff.c
+++ b/drivers/power/reset/regulator-poweroff.c
@@ -13,18 +13,15 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
+#include <linux/reboot.h>
 #include <linux/regulator/consumer.h>
 
 #define TIMEOUT_MS 3000
 
-/*
- * Hold configuration here, cannot be more than one instance of the driver
- * since pm_power_off itself is global.
- */
-static struct regulator *cpu_regulator;
-
-static void regulator_poweroff_do_poweroff(void)
+static int regulator_poweroff_do_poweroff(struct sys_off_data *data)
 {
+	struct regulator *cpu_regulator = data->cb_data;
+
 	if (cpu_regulator && regulator_is_enabled(cpu_regulator))
 		regulator_force_disable(cpu_regulator);
 
@@ -32,30 +29,24 @@ static void regulator_poweroff_do_poweroff(void)
 	mdelay(TIMEOUT_MS);
 
 	WARN_ON(1);
+
+	return NOTIFY_DONE;
 }
 
 static int regulator_poweroff_probe(struct platform_device *pdev)
 {
-	/* If a pm_power_off function has already been added, leave it alone */
-	if (pm_power_off != NULL) {
-		dev_err(&pdev->dev,
-			"%s: pm_power_off function already registered\n",
-			__func__);
-		return -EBUSY;
-	}
+	struct regulator *cpu_regulator;
 
 	cpu_regulator = devm_regulator_get(&pdev->dev, "cpu");
 	if (IS_ERR(cpu_regulator))
 		return PTR_ERR(cpu_regulator);
 
-	pm_power_off = &regulator_poweroff_do_poweroff;
-	return 0;
-}
-
-static void regulator_poweroff_remove(struct platform_device *pdev)
-{
-	if (pm_power_off == &regulator_poweroff_do_poweroff)
-		pm_power_off = NULL;
+	/* Set this handler to low priority to not override an existing handler */
+	return devm_register_sys_off_handler(&pdev->dev,
+					     SYS_OFF_MODE_POWER_OFF,
+					     SYS_OFF_PRIO_LOW,
+					     regulator_poweroff_do_poweroff,
+					     cpu_regulator);
 }
 
 static const struct of_device_id of_regulator_poweroff_match[] = {
@@ -66,7 +57,6 @@ MODULE_DEVICE_TABLE(of, of_regulator_poweroff_match);
 
 static struct platform_driver regulator_poweroff_driver = {
 	.probe = regulator_poweroff_probe,
-	.remove_new = regulator_poweroff_remove,
 	.driver = {
 		.name = "poweroff-regulator",
 		.of_match_table = of_regulator_poweroff_match,
-- 
2.39.2


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[PATCH 14/18] power: reset: as3722-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/as3722-poweroff.c | 30 ++++++++++-----------------
 1 file changed, 11 insertions(+), 19 deletions(-)

diff --git a/drivers/power/reset/as3722-poweroff.c b/drivers/power/reset/as3722-poweroff.c
index ab3350ce2d621..bb26fa6fa67ca 100644
--- a/drivers/power/reset/as3722-poweroff.c
+++ b/drivers/power/reset/as3722-poweroff.c
@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/reboot.h>
 #include <linux/slab.h>
 
 struct as3722_poweroff {
@@ -18,22 +19,18 @@ struct as3722_poweroff {
 	struct as3722 *as3722;
 };
 
-static struct as3722_poweroff *as3722_pm_poweroff;
-
-static void as3722_pm_power_off(void)
+static int as3722_pm_power_off(struct sys_off_data *data)
 {
+	struct as3722_poweroff *as3722_pm_poweroff = data->cb_data;
 	int ret;
 
-	if (!as3722_pm_poweroff) {
-		pr_err("AS3722 poweroff is not initialised\n");
-		return;
-	}
-
 	ret = as3722_update_bits(as3722_pm_poweroff->as3722,
 		AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF);
 	if (ret < 0)
 		dev_err(as3722_pm_poweroff->dev,
 			"RESET_CONTROL_REG update failed, %d\n", ret);
+
+	return NOTIFY_DONE;
 }
 
 static int as3722_poweroff_probe(struct platform_device *pdev)
@@ -54,18 +51,14 @@ static int as3722_poweroff_probe(struct platform_device *pdev)
 
 	as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent);
 	as3722_poweroff->dev = &pdev->dev;
-	as3722_pm_poweroff = as3722_poweroff;
-	if (!pm_power_off)
-		pm_power_off = as3722_pm_power_off;
 
-	return 0;
-}
+	return devm_register_sys_off_handler(as3722_poweroff->dev,
+					     SYS_OFF_MODE_POWER_OFF,
+					     SYS_OFF_PRIO_DEFAULT,
+					     as3722_pm_power_off,
+					     as3722_poweroff);
 
-static void as3722_poweroff_remove(struct platform_device *pdev)
-{
-	if (pm_power_off == as3722_pm_power_off)
-		pm_power_off = NULL;
-	as3722_pm_poweroff = NULL;
+	return 0;
 }
 
 static struct platform_driver as3722_poweroff_driver = {
@@ -73,7 +66,6 @@ static struct platform_driver as3722_poweroff_driver = {
 		.name = "as3722-power-off",
 	},
 	.probe = as3722_poweroff_probe,
-	.remove_new = as3722_poweroff_remove,
 };
 
 module_platform_driver(as3722_poweroff_driver);
-- 
2.39.2


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[PATCH 15/18] power: reset: gemini-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/gemini-poweroff.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/power/reset/gemini-poweroff.c b/drivers/power/reset/gemini-poweroff.c
index d309b610142ce..06d6992dec892 100644
--- a/drivers/power/reset/gemini-poweroff.c
+++ b/drivers/power/reset/gemini-poweroff.c
@@ -70,12 +70,9 @@ static irqreturn_t gemini_powerbutton_interrupt(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-/* This callback needs this static local as it has void as argument */
-static struct gemini_powercon *gpw_poweroff;
-
-static void gemini_poweroff(void)
+static int gemini_poweroff(struct sys_off_data *data)
 {
-	struct gemini_powercon *gpw = gpw_poweroff;
+	struct gemini_powercon *gpw = data->cb_data;
 	u32 val;
 
 	dev_crit(gpw->dev, "Gemini power off\n");
@@ -86,6 +83,8 @@ static void gemini_poweroff(void)
 	val &= ~GEMINI_CTRL_ENABLE;
 	val |= GEMINI_CTRL_SHUTDOWN;
 	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+
+	return NOTIFY_DONE;
 }
 
 static int gemini_poweroff_probe(struct platform_device *pdev)
@@ -148,8 +147,11 @@ static int gemini_poweroff_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	pm_power_off = gemini_poweroff;
-	gpw_poweroff = gpw;
+	ret = devm_register_sys_off_handler(dev, SYS_OFF_MODE_POWER_OFF,
+					    SYS_OFF_PRIO_DEFAULT,
+					    gemini_poweroff, gpw);
+	if (ret)
+		return ret;
 
 	dev_info(dev, "Gemini poweroff driver registered\n");
 
-- 
2.39.2


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[PATCH 16/18] power: reset: restart-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/restart-poweroff.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/power/reset/restart-poweroff.c b/drivers/power/reset/restart-poweroff.c
index f4d6004793d3a..fcd588f9ae9d3 100644
--- a/drivers/power/reset/restart-poweroff.c
+++ b/drivers/power/reset/restart-poweroff.c
@@ -14,29 +14,21 @@
 #include <linux/module.h>
 #include <linux/reboot.h>
 
-static void restart_poweroff_do_poweroff(void)
+static int restart_poweroff_do_poweroff(struct sys_off_data *data)
 {
 	reboot_mode = REBOOT_HARD;
 	machine_restart(NULL);
+	return NOTIFY_DONE;
 }
 
 static int restart_poweroff_probe(struct platform_device *pdev)
 {
-	/* If a pm_power_off function has already been added, leave it alone */
-	if (pm_power_off != NULL) {
-		dev_err(&pdev->dev,
-			"pm_power_off function already registered");
-		return -EBUSY;
-	}
-
-	pm_power_off = &restart_poweroff_do_poweroff;
-	return 0;
-}
-
-static void restart_poweroff_remove(struct platform_device *pdev)
-{
-	if (pm_power_off == &restart_poweroff_do_poweroff)
-		pm_power_off = NULL;
+	/* Set this handler to low priority to not override an existing handler */
+	return devm_register_sys_off_handler(&pdev->dev,
+					     SYS_OFF_MODE_POWER_OFF,
+					     SYS_OFF_PRIO_LOW,
+					     restart_poweroff_do_poweroff,
+					     NULL);
 }
 
 static const struct of_device_id of_restart_poweroff_match[] = {
@@ -47,7 +39,6 @@ MODULE_DEVICE_TABLE(of, of_restart_poweroff_match);
 
 static struct platform_driver restart_poweroff_driver = {
 	.probe = restart_poweroff_probe,
-	.remove_new = restart_poweroff_remove,
 	.driver = {
 		.name = "poweroff-restart",
 		.of_match_table = of_restart_poweroff_match,
-- 
2.39.2


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[PATCH 17/18] power: reset: syscon-poweroff: Move device data into a struct

[Andrew Davis]

Currently all these device data elements are top level global variables.
Move these into a struct. This will be used in the next patch when
the global variable usage is removed. Doing this in two steps makes
the patches easier to read.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/syscon-poweroff.c | 36 +++++++++++++++------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/drivers/power/reset/syscon-poweroff.c b/drivers/power/reset/syscon-poweroff.c
index 1b2ce7734260c..4899a019256e8 100644
--- a/drivers/power/reset/syscon-poweroff.c
+++ b/drivers/power/reset/syscon-poweroff.c
@@ -15,15 +15,19 @@
 #include <linux/pm.h>
 #include <linux/regmap.h>
 
-static struct regmap *map;
-static u32 offset;
-static u32 value;
-static u32 mask;
+struct syscon_poweroff_data {
+	struct regmap *map;
+	u32 offset;
+	u32 value;
+	u32 mask;
+};
+
+static struct syscon_poweroff_data *data;
 
 static void syscon_poweroff(void)
 {
 	/* Issue the poweroff */
-	regmap_update_bits(map, offset, mask, value);
+	regmap_update_bits(data->map, data->offset, data->mask, data->value);
 
 	mdelay(1000);
 
@@ -35,22 +39,22 @@ static int syscon_poweroff_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int mask_err, value_err;
 
-	map = syscon_regmap_lookup_by_phandle(dev->of_node, "regmap");
-	if (IS_ERR(map)) {
-		map = syscon_node_to_regmap(dev->parent->of_node);
-		if (IS_ERR(map)) {
+	data->map = syscon_regmap_lookup_by_phandle(dev->of_node, "regmap");
+	if (IS_ERR(data->map)) {
+		data->map = syscon_node_to_regmap(dev->parent->of_node);
+		if (IS_ERR(data->map)) {
 			dev_err(dev, "unable to get syscon");
-			return PTR_ERR(map);
+			return PTR_ERR(data->map);
 		}
 	}
 
-	if (of_property_read_u32(dev->of_node, "offset", &offset)) {
+	if (of_property_read_u32(dev->of_node, "offset", &data->offset)) {
 		dev_err(dev, "unable to read 'offset'");
 		return -EINVAL;
 	}
 
-	value_err = of_property_read_u32(dev->of_node, "value", &value);
-	mask_err = of_property_read_u32(dev->of_node, "mask", &mask);
+	value_err = of_property_read_u32(dev->of_node, "value", &data->value);
+	mask_err = of_property_read_u32(dev->of_node, "mask", &data->mask);
 	if (value_err && mask_err) {
 		dev_err(dev, "unable to read 'value' and 'mask'");
 		return -EINVAL;
@@ -58,11 +62,11 @@ static int syscon_poweroff_probe(struct platform_device *pdev)
 
 	if (value_err) {
 		/* support old binding */
-		value = mask;
-		mask = 0xFFFFFFFF;
+		data->value = data->mask;
+		data->mask = 0xFFFFFFFF;
 	} else if (mask_err) {
 		/* support value without mask*/
-		mask = 0xFFFFFFFF;
+		data->mask = 0xFFFFFFFF;
 	}
 
 	if (pm_power_off) {
-- 
2.39.2


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[PATCH 18/18] power: reset: syscon-poweroff: Use devm_register_sys_off_handler(POWER_OFF)

[Andrew Davis]

Use device life-cycle managed register function to simplify probe and
exit paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/power/reset/syscon-poweroff.c | 34 ++++++++++++---------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/power/reset/syscon-poweroff.c b/drivers/power/reset/syscon-poweroff.c
index 4899a019256e8..203936f4c544f 100644
--- a/drivers/power/reset/syscon-poweroff.c
+++ b/drivers/power/reset/syscon-poweroff.c
@@ -13,6 +13,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
+#include <linux/reboot.h>
 #include <linux/regmap.h>
 
 struct syscon_poweroff_data {
@@ -22,23 +23,30 @@ struct syscon_poweroff_data {
 	u32 mask;
 };
 
-static struct syscon_poweroff_data *data;
-
-static void syscon_poweroff(void)
+static int syscon_poweroff(struct sys_off_data *off_data)
 {
+	struct syscon_poweroff_data *data = off_data->cb_data;
+
 	/* Issue the poweroff */
 	regmap_update_bits(data->map, data->offset, data->mask, data->value);
 
 	mdelay(1000);
 
 	pr_emerg("Unable to poweroff system\n");
+
+	return NOTIFY_DONE;
 }
 
 static int syscon_poweroff_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct syscon_poweroff_data *data;
 	int mask_err, value_err;
 
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
 	data->map = syscon_regmap_lookup_by_phandle(dev->of_node, "regmap");
 	if (IS_ERR(data->map)) {
 		data->map = syscon_node_to_regmap(dev->parent->of_node);
@@ -69,21 +77,10 @@ static int syscon_poweroff_probe(struct platform_device *pdev)
 		data->mask = 0xFFFFFFFF;
 	}
 
-	if (pm_power_off) {
-		dev_err(dev, "pm_power_off already claimed for %ps",
-			pm_power_off);
-		return -EBUSY;
-	}
-
-	pm_power_off = syscon_poweroff;
-
-	return 0;
-}
-
-static void syscon_poweroff_remove(struct platform_device *pdev)
-{
-	if (pm_power_off == syscon_poweroff)
-		pm_power_off = NULL;
+	return devm_register_sys_off_handler(&pdev->dev,
+					     SYS_OFF_MODE_POWER_OFF,
+					     SYS_OFF_PRIO_DEFAULT,
+					     syscon_poweroff, data);
 }
 
 static const struct of_device_id syscon_poweroff_of_match[] = {
@@ -93,7 +90,6 @@ static const struct of_device_id syscon_poweroff_of_match[] = {
 
 static struct platform_driver syscon_poweroff_driver = {
 	.probe = syscon_poweroff_probe,
-	.remove_new = syscon_poweroff_remove,
 	.driver = {
 		.name = "syscon-poweroff",
 		.of_match_table = syscon_poweroff_of_match,
-- 
2.39.2


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