diff mbox series

[RFC,2/5] drivers/soc/litex: Use devm_register_restart_handler()

Message ID 20231117161006.87734-3-afd@ti.com
State New
Headers
Series Deprecate register_restart_handler() |

Commit Message

Andrew Davis Nov. 17, 2023, 4:10 p.m. UTC 
  Use device life-cycle managed register function to simplify probe error
path and eliminate need for explicit remove function.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/soc/litex/litex_soc_ctrl.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

Comments

Gabriel L. Somlo Nov. 29, 2023, 10:03 a.m. UTC | #1 
On Fri, Nov 17, 2023 at 10:10:03AM -0600, Andrew Davis wrote:
> Use device life-cycle managed register function to simplify probe error
> path and eliminate need for explicit remove function.
> 
> Signed-off-by: Andrew Davis <afd@ti.com>

Reviewed-by: Gabriel Somlo <gsomlo@gmail.com>

Thanks much,
--Gabriel
> ---
>  drivers/soc/litex/litex_soc_ctrl.c | 23 +++++------------------
>  1 file changed, 5 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/soc/litex/litex_soc_ctrl.c b/drivers/soc/litex/litex_soc_ctrl.c
> index 10813299aa106..7a0096d93c73d 100644
> --- a/drivers/soc/litex/litex_soc_ctrl.c
> +++ b/drivers/soc/litex/litex_soc_ctrl.c
> @@ -69,14 +69,11 @@ static int litex_check_csr_access(void __iomem *reg_addr)
>  
>  struct litex_soc_ctrl_device {
>  	void __iomem *base;
> -	struct notifier_block reset_nb;
>  };
>  
> -static int litex_reset_handler(struct notifier_block *this, unsigned long mode,
> -			       void *cmd)
> +static int litex_reset_handler(struct sys_off_data *data)
>  {
> -	struct litex_soc_ctrl_device *soc_ctrl_dev =
> -		container_of(this, struct litex_soc_ctrl_device, reset_nb);
> +	struct litex_soc_ctrl_device *soc_ctrl_dev = data->cb_data;
>  
>  	litex_write32(soc_ctrl_dev->base + RESET_REG_OFF, RESET_REG_VALUE);
>  	return NOTIFY_DONE;
> @@ -107,11 +104,9 @@ static int litex_soc_ctrl_probe(struct platform_device *pdev)
>  	if (error)
>  		return error;
>  
> -	platform_set_drvdata(pdev, soc_ctrl_dev);
> -
> -	soc_ctrl_dev->reset_nb.notifier_call = litex_reset_handler;
> -	soc_ctrl_dev->reset_nb.priority = 128;
> -	error = register_restart_handler(&soc_ctrl_dev->reset_nb);
> +	error = devm_register_restart_handler(&pdev->dev,
> +					      litex_reset_handler,
> +					      soc_ctrl_dev);
>  	if (error) {
>  		dev_warn(&pdev->dev, "cannot register restart handler: %d\n",
>  			 error);
> @@ -120,20 +115,12 @@ static int litex_soc_ctrl_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -static void litex_soc_ctrl_remove(struct platform_device *pdev)
> -{
> -	struct litex_soc_ctrl_device *soc_ctrl_dev = platform_get_drvdata(pdev);
> -
> -	unregister_restart_handler(&soc_ctrl_dev->reset_nb);
> -}
> -
>  static struct platform_driver litex_soc_ctrl_driver = {
>  	.driver = {
>  		.name = "litex-soc-controller",
>  		.of_match_table = of_match_ptr(litex_soc_ctrl_of_match)
>  	},
>  	.probe = litex_soc_ctrl_probe,
> -	.remove_new = litex_soc_ctrl_remove,
>  };
>  
>  module_platform_driver(litex_soc_ctrl_driver);
> -- 
> 2.39.2
>
Gabriel L. Somlo Dec. 20, 2023, 8:35 p.m. UTC | #2 
On Fri, Nov 17, 2023 at 10:10:03AM -0600, Andrew Davis wrote:
> Use device life-cycle managed register function to simplify probe error
> path and eliminate need for explicit remove function.
> 
> Signed-off-by: Andrew Davis <afd@ti.com>

Reviewed-by: Gabriel Somlo <gsomlo@gmail.com>

Arnd: the original patch is available here for the purpose of pulling via
the soc tree:
https://lore.kernel.org/lkml/20231117161006.87734-3-afd@ti.com/

Thanks,
--Gabriel

> ---
>  drivers/soc/litex/litex_soc_ctrl.c | 23 +++++------------------
>  1 file changed, 5 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/soc/litex/litex_soc_ctrl.c b/drivers/soc/litex/litex_soc_ctrl.c
> index 10813299aa106..7a0096d93c73d 100644
> --- a/drivers/soc/litex/litex_soc_ctrl.c
> +++ b/drivers/soc/litex/litex_soc_ctrl.c
> @@ -69,14 +69,11 @@ static int litex_check_csr_access(void __iomem *reg_addr)
>  
>  struct litex_soc_ctrl_device {
>  	void __iomem *base;
> -	struct notifier_block reset_nb;
>  };
>  
> -static int litex_reset_handler(struct notifier_block *this, unsigned long mode,
> -			       void *cmd)
> +static int litex_reset_handler(struct sys_off_data *data)
>  {
> -	struct litex_soc_ctrl_device *soc_ctrl_dev =
> -		container_of(this, struct litex_soc_ctrl_device, reset_nb);
> +	struct litex_soc_ctrl_device *soc_ctrl_dev = data->cb_data;
>  
>  	litex_write32(soc_ctrl_dev->base + RESET_REG_OFF, RESET_REG_VALUE);
>  	return NOTIFY_DONE;
> @@ -107,11 +104,9 @@ static int litex_soc_ctrl_probe(struct platform_device *pdev)
>  	if (error)
>  		return error;
>  
> -	platform_set_drvdata(pdev, soc_ctrl_dev);
> -
> -	soc_ctrl_dev->reset_nb.notifier_call = litex_reset_handler;
> -	soc_ctrl_dev->reset_nb.priority = 128;
> -	error = register_restart_handler(&soc_ctrl_dev->reset_nb);
> +	error = devm_register_restart_handler(&pdev->dev,
> +					      litex_reset_handler,
> +					      soc_ctrl_dev);
>  	if (error) {
>  		dev_warn(&pdev->dev, "cannot register restart handler: %d\n",
>  			 error);
> @@ -120,20 +115,12 @@ static int litex_soc_ctrl_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -static void litex_soc_ctrl_remove(struct platform_device *pdev)
> -{
> -	struct litex_soc_ctrl_device *soc_ctrl_dev = platform_get_drvdata(pdev);
> -
> -	unregister_restart_handler(&soc_ctrl_dev->reset_nb);
> -}
> -
>  static struct platform_driver litex_soc_ctrl_driver = {
>  	.driver = {
>  		.name = "litex-soc-controller",
>  		.of_match_table = of_match_ptr(litex_soc_ctrl_of_match)
>  	},
>  	.probe = litex_soc_ctrl_probe,
> -	.remove_new = litex_soc_ctrl_remove,
>  };
>  
>  module_platform_driver(litex_soc_ctrl_driver);
> -- 
> 2.39.2
>
diff mbox series

Patch

diff --git a/drivers/soc/litex/litex_soc_ctrl.c b/drivers/soc/litex/litex_soc_ctrl.c
index 10813299aa106..7a0096d93c73d 100644
--- a/drivers/soc/litex/litex_soc_ctrl.c
+++ b/drivers/soc/litex/litex_soc_ctrl.c
@@ -69,14 +69,11 @@  static int litex_check_csr_access(void __iomem *reg_addr)
 
 struct litex_soc_ctrl_device {
 	void __iomem *base;
-	struct notifier_block reset_nb;
 };
 
-static int litex_reset_handler(struct notifier_block *this, unsigned long mode,
-			       void *cmd)
+static int litex_reset_handler(struct sys_off_data *data)
 {
-	struct litex_soc_ctrl_device *soc_ctrl_dev =
-		container_of(this, struct litex_soc_ctrl_device, reset_nb);
+	struct litex_soc_ctrl_device *soc_ctrl_dev = data->cb_data;
 
 	litex_write32(soc_ctrl_dev->base + RESET_REG_OFF, RESET_REG_VALUE);
 	return NOTIFY_DONE;
@@ -107,11 +104,9 @@  static int litex_soc_ctrl_probe(struct platform_device *pdev)
 	if (error)
 		return error;
 
-	platform_set_drvdata(pdev, soc_ctrl_dev);
-
-	soc_ctrl_dev->reset_nb.notifier_call = litex_reset_handler;
-	soc_ctrl_dev->reset_nb.priority = 128;
-	error = register_restart_handler(&soc_ctrl_dev->reset_nb);
+	error = devm_register_restart_handler(&pdev->dev,
+					      litex_reset_handler,
+					      soc_ctrl_dev);
 	if (error) {
 		dev_warn(&pdev->dev, "cannot register restart handler: %d\n",
 			 error);
@@ -120,20 +115,12 @@  static int litex_soc_ctrl_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static void litex_soc_ctrl_remove(struct platform_device *pdev)
-{
-	struct litex_soc_ctrl_device *soc_ctrl_dev = platform_get_drvdata(pdev);
-
-	unregister_restart_handler(&soc_ctrl_dev->reset_nb);
-}
-
 static struct platform_driver litex_soc_ctrl_driver = {
 	.driver = {
 		.name = "litex-soc-controller",
 		.of_match_table = of_match_ptr(litex_soc_ctrl_of_match)
 	},
 	.probe = litex_soc_ctrl_probe,
-	.remove_new = litex_soc_ctrl_remove,
 };
 
 module_platform_driver(litex_soc_ctrl_driver);