linux-kernel - Re: [PATCH v1 2/2] extcon: axp288: Use for_each_set_bit() in axp288_extcon_log

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Message-ID: <c3c0fe37-73eb-d11c-2499-469ece09371c@samsung.com>
Date:   Fri, 26 Jul 2019 11:20:18 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        linux-kernel@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH v1 2/2] extcon: axp288: Use for_each_set_bit() in
 axp288_extcon_log_rsi()

On 19. 7. 26. 오전 5:34, Andy Shevchenko wrote:
> This simplifies and standardizes axp288_extcon_log_rsi()
> by using for_each_set_bit() library function.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/extcon/extcon-axp288.c | 13 +++++--------
>  1 file changed, 5 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
> index 4cbcc3b1aa6b..670334c362ac 100644
> --- a/drivers/extcon/extcon-axp288.c
> +++ b/drivers/extcon/extcon-axp288.c
> @@ -121,7 +121,6 @@ static const char * const axp288_pwr_up_down_info[] = {
>  	"Last shutdown caused by PMIC UVLO threshold",
>  	"Last shutdown caused by SOC initiated cold off",
>  	"Last shutdown caused by user pressing the power button",
> -	NULL,
>  };
>  
>  /*
> @@ -130,20 +129,18 @@ static const char * const axp288_pwr_up_down_info[] = {
>   */
>  static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
>  {
> -	const char * const *rsi;
>  	unsigned int val, i, clear_mask = 0;
> +	unsigned long bits;
>  	int ret;
>  
>  	ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
>  	if (ret < 0)
>  		return;
>  
> -	for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
> -		if (val & BIT(i)) {
> -			dev_dbg(info->dev, "%s\n", *rsi);
> -			clear_mask |= BIT(i);
> -		}
> -	}
> +	bits = val & GENMASK(ARRAY_SIZE(axp288_pwr_up_down_info) - 1, 0);
> +	for_each_set_bit(i, &bits, ARRAY_SIZE(axp288_pwr_up_down_info))
> +		dev_dbg(info->dev, "%s\n", axp288_pwr_up_down_info[i]);
> +	clear_mask = bits;
>  
>  	/* Clear the register value for next reboot (write 1 to clear bit) */
>  	regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
> 

Acked-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics