Re: [PATCH] watchdog: da9063: Do not use a global variable

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On Mon, Sep 02, 2024 at 07:45:04PM -0300, Fabio Estevam wrote:
> From: Fabio Estevam <festevam@xxxxxxx>
> 
> Using the 'use_sw_pm' variable as global is not recommended
> as it prevents multi instances of the driver to run.
> 
> Make it a member of the da9063 structure instead.
> 
> Signed-off-by: Fabio Estevam <festevam@xxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

> ---
>  drivers/watchdog/da9063_wdt.c   | 9 +++++----
>  include/linux/mfd/da9063/core.h | 1 +
>  2 files changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/watchdog/da9063_wdt.c b/drivers/watchdog/da9063_wdt.c
> index 684667469b10..69f884cf1a7b 100644
> --- a/drivers/watchdog/da9063_wdt.c
> +++ b/drivers/watchdog/da9063_wdt.c
> @@ -27,7 +27,6 @@
>   *   others: timeout = 2048 ms * 2^(TWDSCALE-1).
>   */
>  static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 };
> -static bool use_sw_pm;
>  
>  #define DA9063_TWDSCALE_DISABLE		0
>  #define DA9063_TWDSCALE_MIN		1
> @@ -230,7 +229,7 @@ static int da9063_wdt_probe(struct platform_device *pdev)
>  	if (!wdd)
>  		return -ENOMEM;
>  
> -	use_sw_pm = device_property_present(dev, "dlg,use-sw-pm");
> +	da9063->use_sw_pm = device_property_present(dev, "dlg,use-sw-pm");
>  
>  	wdd->info = &da9063_watchdog_info;
>  	wdd->ops = &da9063_watchdog_ops;
> @@ -267,8 +266,9 @@ static int da9063_wdt_probe(struct platform_device *pdev)
>  static int __maybe_unused da9063_wdt_suspend(struct device *dev)
>  {
>  	struct watchdog_device *wdd = dev_get_drvdata(dev);
> +	struct da9063 *da9063 = watchdog_get_drvdata(wdd);
>  
> -	if (!use_sw_pm)
> +	if (!da9063->use_sw_pm)
>  		return 0;
>  
>  	if (watchdog_active(wdd))
> @@ -280,8 +280,9 @@ static int __maybe_unused da9063_wdt_suspend(struct device *dev)
>  static int __maybe_unused da9063_wdt_resume(struct device *dev)
>  {
>  	struct watchdog_device *wdd = dev_get_drvdata(dev);
> +	struct da9063 *da9063 = watchdog_get_drvdata(wdd);
>  
> -	if (!use_sw_pm)
> +	if (!da9063->use_sw_pm)
>  		return 0;
>  
>  	if (watchdog_active(wdd))
> diff --git a/include/linux/mfd/da9063/core.h b/include/linux/mfd/da9063/core.h
> index 8db52324f416..eae82f421414 100644
> --- a/include/linux/mfd/da9063/core.h
> +++ b/include/linux/mfd/da9063/core.h
> @@ -78,6 +78,7 @@ struct da9063 {
>  	enum da9063_type type;
>  	unsigned char	variant_code;
>  	unsigned int	flags;
> +	bool use_sw_pm;
>  
>  	/* Control interface */
>  	struct regmap	*regmap;
> -- 
> 2.34.1
> 
> 




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