diff options
| author | Fengquan Chen <Fengquan.Chen@mediatek.com> | 2021-09-14 20:34:54 +0800 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2021-10-26 21:31:11 +0200 |
| commit | 59b0f51335644ee603260faaa4298c0115fb7187 (patch) | |
| tree | d1febd853a8a23e8a9f4e4f28ff4c3276c2bae85 /drivers/watchdog/mtk_wdt.c | |
| parent | eed09878923ef2cd69b832b8ac84f8dfa674f353 (diff) | |
watchdog: mtk: add disable_wdt_extrst support
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>
Diffstat (limited to 'drivers/watchdog/mtk_wdt.c')
| -rw-r--r-- | drivers/watchdog/mtk_wdt.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index 796fbb048cbe..ceb57ea627cd 100644 --- a/drivers/watchdog/mtk_wdt.c +++ b/drivers/watchdog/mtk_wdt.c @@ -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; } |