Re: [PATCH v2 1/2] watchdog: Add driver for Mediatek watchdog

Eddie Huang
2014-12-15T03:37:41Z

Hi,

On Fri, 2014-12-12 at 15:50 +0100, Matthias Brugger wrote:
> This patch adds a driver for the Mediatek SoC integrated
> watchdog. This driver supports watchdog and software reset
> for mt65xx and mt81xx SoCs.
>
> Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

> +static int mtk_reset_handler(struct notifier_block *this, unsigned long mode,
> + void *cmd)
> +{
> + struct mtk_wdt_dev *mtk_wdt = container_of(this,
> + struct mtk_wdt_dev,
> + restart_handler);
> + void __iomem *wdt_base = mtk_wdt->wdt_base;
> + u32 reg;
> +
> + /* Reset system */
> + writel(WDT_SWRST_KEY, wdt_base + WDT_SWRST);
> +
> + while (1) {
> + mdelay(5);
> + writel(WDT_SWRST_KEY, wdt_base + WDT_SWRST);
> + }
> + return NOTIFY_DONE;
> +
> +}

Build warning
../drivers/watchdog/mtk_wdt.c:78:6: warning: unused variable
'reg' [-Wunused-variable]