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

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	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki