renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-15 09:03:59 +08:00
Code

watchdog: mtk: add disable_wdt_extrst support

Browse Source 
In some cases, we may need watchdog just to trigger an
internal soc reset without sending any output signal.

Provide a disable_wdt_extrst parameter for configuration.
We can disable or enable it just by configuring dts.

Signed-off-by: Fengquan Chen <fengquan.chen@mediatek.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210914123454.32603-3-Fengquan.Chen@mediatek.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Fengquan Chen 2021-09-14 20:34:54 +08:00 committed by Wim Van Sebroeck
parent eed0987892
commit 59b0f51335
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/watchdog/mtk_wdt.c
View File

@ -65,6 +65,7 @@ struct mtk_wdt_dev {
void __iomem *wdt_base;
spinlock_t lock; /* protects WDT_SWSYSRST reg */
struct reset_controller_dev rcdev;
bool disable_wdt_extrst;
};
struct mtk_wdt_data {
@ -256,6 +257,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
reg |= (WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
else
reg &= ~(WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
if (mtk_wdt->disable_wdt_extrst)
reg &= ~WDT_MODE_EXRST_EN;
reg |= (WDT_MODE_EN | WDT_MODE_KEY);
iowrite32(reg, wdt_base + WDT_MODE);
@ -381,6 +384,10 @@ static int mtk_wdt_probe(struct platform_device *pdev)
if (err)
return err;
}
mtk_wdt->disable_wdt_extrst =
of_property_read_bool(dev->of_node, "mediatek,disable-extrst");
return 0;
}