From 423fc66eb6ce7ad1091091017c47a1ed320c4017 Mon Sep 17 00:00:00 2001 From: Jacky Bai Date: Tue, 10 Oct 2023 16:19:07 +0800 Subject: wdog: imx7ulp: Enable wdog int_en bit for watchdog any reset The wdog INT_EN bit in CS register should be set to '1' to trigger WDOG_ANY external reset on i.MX93. Signed-off-by: Jacky Bai Reviewed-by: Peng Fan Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20231010081909.2899101-1-ping.bai@nxp.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/imx7ulp_wdt.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/watchdog') diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c index c703586c6e5f..b21d7a74a42d 100644 --- a/drivers/watchdog/imx7ulp_wdt.c +++ b/drivers/watchdog/imx7ulp_wdt.c @@ -23,6 +23,7 @@ #define LPO_CLK_SHIFT 8 #define WDOG_CS_CLK (LPO_CLK << LPO_CLK_SHIFT) #define WDOG_CS_EN BIT(7) +#define WDOG_CS_INT_EN BIT(6) #define WDOG_CS_UPDATE BIT(5) #define WDOG_CS_WAIT BIT(1) #define WDOG_CS_STOP BIT(0) @@ -62,6 +63,7 @@ struct imx7ulp_wdt_device { void __iomem *base; struct clk *clk; bool post_rcs_wait; + bool ext_reset; const struct imx_wdt_hw_feature *hw; }; @@ -285,6 +287,9 @@ static int imx7ulp_wdt_init(struct imx7ulp_wdt_device *wdt, unsigned int timeout if (wdt->hw->prescaler_enable) val |= WDOG_CS_PRES; + if (wdt->ext_reset) + val |= WDOG_CS_INT_EN; + do { ret = _imx7ulp_wdt_init(wdt, timeout, val); toval = readl(wdt->base + WDOG_TOVAL); @@ -321,6 +326,9 @@ static int imx7ulp_wdt_probe(struct platform_device *pdev) return PTR_ERR(imx7ulp_wdt->clk); } + /* The WDOG may need to do external reset through dedicated pin */ + imx7ulp_wdt->ext_reset = of_property_read_bool(dev->of_node, "fsl,ext-reset-output"); + imx7ulp_wdt->post_rcs_wait = true; if (of_device_is_compatible(dev->of_node, "fsl,imx8ulp-wdt")) { -- cgit v1.2.3