lkml.org 
[lkml]   [2023]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2 2/2] watchdog: mtk_wdt: Add reset_by_toprgu support
From
On 1/16/23 02:53, Allen-KH Cheng wrote:
> In some cases, the MediaTek watchdog requires the toprgu to reset
> timer after system resets.
>
> Provide a reset_by_toprgu parameter for configuration.
>
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
> drivers/watchdog/mtk_wdt.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> index 3e6212591e69..a9c437598e7e 100644
> --- a/drivers/watchdog/mtk_wdt.c
> +++ b/drivers/watchdog/mtk_wdt.c
> @@ -50,6 +50,7 @@
> #define WDT_MODE_IRQ_EN (1 << 3)
> #define WDT_MODE_AUTO_START (1 << 4)
> #define WDT_MODE_DUAL_EN (1 << 6)
> +#define WDT_MODE_CNT_SEL (1 << 8)
> #define WDT_MODE_KEY 0x22000000
>
> #define WDT_SWRST 0x14
> @@ -70,6 +71,7 @@ struct mtk_wdt_dev {
> spinlock_t lock; /* protects WDT_SWSYSRST reg */
> struct reset_controller_dev rcdev;
> bool disable_wdt_extrst;
> + bool reset_by_toprgu;
> };
>
> struct mtk_wdt_data {
> @@ -279,6 +281,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
> reg &= ~(WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
> if (mtk_wdt->disable_wdt_extrst)
> reg &= ~WDT_MODE_EXRST_EN;
> + if (mtk_wdt->reset_by_toprgu)
> + reg |= WDT_MODE_CNT_SEL;
> reg |= (WDT_MODE_EN | WDT_MODE_KEY);
> iowrite32(reg, wdt_base + WDT_MODE);
>
> @@ -408,6 +412,9 @@ static int mtk_wdt_probe(struct platform_device *pdev)
> mtk_wdt->disable_wdt_extrst =
> of_property_read_bool(dev->of_node, "mediatek,disable-extrst");
>
> + mtk_wdt->reset_by_toprgu =
> + of_property_read_bool(dev->of_node, "mediatek,reset-by-toprgu");
> +
> return 0;
> }
>

\
 
 \ /
  Last update: 2023-03-26 23:43    [W:0.046 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site