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29d987fc89
Replace "920-watchdog-add-mt7986-assert.patch" with upstreamed - 920-v5.16-watchdog-mtk-add-disable_wdt_extrst-support.patch - 921-v5.19-watchdog-mtk_wdt-mt7986-Add-toprgu-reset-controller.patch Signed-off-by: Nick Hainke <vincent@systemli.org>
51 lines
1.6 KiB
Diff
51 lines
1.6 KiB
Diff
From 59b0f51335644ee603260faaa4298c0115fb7187 Mon Sep 17 00:00:00 2001
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From: Fengquan Chen <Fengquan.Chen@mediatek.com>
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Date: Tue, 14 Sep 2021 20:34:54 +0800
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Subject: [PATCH] watchdog: mtk: add disable_wdt_extrst support
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In some cases, we may need watchdog just to trigger an
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internal soc reset without sending any output signal.
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Provide a disable_wdt_extrst parameter for configuration.
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We can disable or enable it just by configuring dts.
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Signed-off-by: Fengquan Chen <fengquan.chen@mediatek.com>
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Reviewed-by: Guenter Roeck <linux@roeck-us.net>
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Link: https://lore.kernel.org/r/20210914123454.32603-3-Fengquan.Chen@mediatek.com
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Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
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---
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drivers/watchdog/mtk_wdt.c | 7 +++++++
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1 file changed, 7 insertions(+)
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--- a/drivers/watchdog/mtk_wdt.c
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+++ b/drivers/watchdog/mtk_wdt.c
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@@ -65,6 +65,7 @@ struct mtk_wdt_dev {
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void __iomem *wdt_base;
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spinlock_t lock; /* protects WDT_SWSYSRST reg */
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struct reset_controller_dev rcdev;
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+ bool disable_wdt_extrst;
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};
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struct mtk_wdt_data {
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@@ -256,6 +257,8 @@ static int mtk_wdt_start(struct watchdog
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reg |= (WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
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else
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reg &= ~(WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
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+ if (mtk_wdt->disable_wdt_extrst)
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+ reg &= ~WDT_MODE_EXRST_EN;
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reg |= (WDT_MODE_EN | WDT_MODE_KEY);
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iowrite32(reg, wdt_base + WDT_MODE);
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@@ -381,6 +384,10 @@ static int mtk_wdt_probe(struct platform
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if (err)
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return err;
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}
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+
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+ mtk_wdt->disable_wdt_extrst =
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+ of_property_read_bool(dev->of_node, "mediatek,disable-extrst");
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+
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return 0;
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}
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