linux-kernel - Re: [PATCH v3 RESEND 1/5] watchdog: s3c2410_wdt: Replace hardcoded values with macro definitions

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Message-ID: <CAPLW+4=Gsd9VNv6T_e2QMWkPNbjp4c2GQEYpD9icU3r+0QuPww@mail.gmail.com>
Date: Thu, 24 Jul 2025 02:14:10 -0500
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Sangwook Shin <sw617.shin@...sung.com>
Cc: krzk@...nel.org, alim.akhtar@...sung.com, wim@...ux-watchdog.org, 
	linux@...ck-us.net, linux-arm-kernel@...ts.infradead.org, 
	linux-samsung-soc@...r.kernel.org, linux-watchdog@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 RESEND 1/5] watchdog: s3c2410_wdt: Replace hardcoded
 values with macro definitions

On Mon, Jul 14, 2025 at 12:59 AM Sangwook Shin <sw617.shin@...sung.com> wrote:
>
> Modify the code to utilize macro-defined values instead of hardcoded
> values. The value 0x100 in the s3c2410wdt_set_heartbeat function represents
> S3C2410_WTCON_PRESCALE_MAX + 1, but it is hardcoded, making its meaning
> difficult to understand and reducing code readability.
>
> Signed-off-by: Sangwook Shin <sw617.shin@...sung.com>
> ---

Reviewed-by: Sam Protsenko <semen.protsenko@...aro.org>

>  drivers/watchdog/s3c2410_wdt.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
> index 40901bdac426..95f7207e390a 100644
> --- a/drivers/watchdog/s3c2410_wdt.c
> +++ b/drivers/watchdog/s3c2410_wdt.c
> @@ -587,7 +587,7 @@ static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd,
>         if (count >= 0x10000) {
>                 divisor = DIV_ROUND_UP(count, 0xffff);
>
> -               if (divisor > 0x100) {
> +               if (divisor > S3C2410_WTCON_PRESCALE_MAX + 1) {
>                         dev_err(wdt->dev, "timeout %d too big\n", timeout);
>                         return -EINVAL;
>                 }
> --
> 2.25.1
>
>