diff options
Diffstat (limited to 'target/linux/mediatek/patches-5.15/920-v5.16-watchdog-mtk-add-disable_wdt_extrst-support.patch')
| -rw-r--r-- | target/linux/mediatek/patches-5.15/920-v5.16-watchdog-mtk-add-disable_wdt_extrst-support.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-5.15/920-v5.16-watchdog-mtk-add-disable_wdt_extrst-support.patch b/target/linux/mediatek/patches-5.15/920-v5.16-watchdog-mtk-add-disable_wdt_extrst-support.patch new file mode 100644 index 0000000000..d9379721fb --- /dev/null +++ b/target/linux/mediatek/patches-5.15/920-v5.16-watchdog-mtk-add-disable_wdt_extrst-support.patch @@ -0,0 +1,50 @@ +From 59b0f51335644ee603260faaa4298c0115fb7187 Mon Sep 17 00:00:00 2001 +From: Fengquan Chen <Fengquan.Chen@mediatek.com> +Date: Tue, 14 Sep 2021 20:34:54 +0800 +Subject: [PATCH] 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> +--- + drivers/watchdog/mtk_wdt.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +--- 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 + 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 + if (err) + return err; + } ++ ++ mtk_wdt->disable_wdt_extrst = ++ of_property_read_bool(dev->of_node, "mediatek,disable-extrst"); ++ + return 0; + } + |