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author | Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-03-13 19:14:41 +0100 |
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committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-03-13 19:14:41 +0100 |
commit | 2e8ebed6ede01f187f8a06bbae3e3b3325bda36c (patch) | |
tree | 4c4594857bb0b1455dcabae3c5638fcbe53c46b2 /drivers/watchdog | |
parent | 1462eecfc534fbfe85645d632527b358354fa3f4 (diff) | |
parent | 8c088370c2a684acad45e0035d9f2dfd85087db0 (diff) | |
download | linux-2e8ebed6ede01f187f8a06bbae3e3b3325bda36c.tar.gz linux-2e8ebed6ede01f187f8a06bbae3e3b3325bda36c.tar.bz2 linux-2e8ebed6ede01f187f8a06bbae3e3b3325bda36c.zip |
Merge branch 'v4.16-fixes'
Diffstat (limited to 'drivers/watchdog')
-rw-r--r-- | drivers/watchdog/aspeed_wdt.c | 9 | ||||
-rw-r--r-- | drivers/watchdog/dw_wdt.c | 32 | ||||
-rw-r--r-- | drivers/watchdog/sprd_wdt.c | 4 |
3 files changed, 33 insertions, 12 deletions
diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index ca5b91e2eb92..d1987d63b37c 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -232,11 +232,14 @@ static int aspeed_wdt_probe(struct platform_device *pdev) wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC | WDT_CTRL_RESET_SYSTEM; } else { if (!strcmp(reset_type, "cpu")) - wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU; + wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU | + WDT_CTRL_RESET_SYSTEM; else if (!strcmp(reset_type, "soc")) - wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC; + wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC | + WDT_CTRL_RESET_SYSTEM; else if (!strcmp(reset_type, "system")) - wdt->ctrl |= WDT_CTRL_RESET_SYSTEM; + wdt->ctrl |= WDT_CTRL_RESET_MODE_FULL_CHIP | + WDT_CTRL_RESET_SYSTEM; else if (strcmp(reset_type, "none")) return -EINVAL; } diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c index c2f4ff516230..501aebb5b81f 100644 --- a/drivers/watchdog/dw_wdt.c +++ b/drivers/watchdog/dw_wdt.c @@ -34,6 +34,7 @@ #define WDOG_CONTROL_REG_OFFSET 0x00 #define WDOG_CONTROL_REG_WDT_EN_MASK 0x01 +#define WDOG_CONTROL_REG_RESP_MODE_MASK 0x02 #define WDOG_TIMEOUT_RANGE_REG_OFFSET 0x04 #define WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT 4 #define WDOG_CURRENT_COUNT_REG_OFFSET 0x08 @@ -56,6 +57,9 @@ struct dw_wdt { unsigned long rate; struct watchdog_device wdd; struct reset_control *rst; + /* Save/restore */ + u32 control; + u32 timeout; }; #define to_dw_wdt(wdd) container_of(wdd, struct dw_wdt, wdd) @@ -121,14 +125,23 @@ static int dw_wdt_set_timeout(struct watchdog_device *wdd, unsigned int top_s) return 0; } +static void dw_wdt_arm_system_reset(struct dw_wdt *dw_wdt) +{ + u32 val = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + + /* Disable interrupt mode; always perform system reset. */ + val &= ~WDOG_CONTROL_REG_RESP_MODE_MASK; + /* Enable watchdog. */ + val |= WDOG_CONTROL_REG_WDT_EN_MASK; + writel(val, dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); +} + static int dw_wdt_start(struct watchdog_device *wdd) { struct dw_wdt *dw_wdt = to_dw_wdt(wdd); dw_wdt_set_timeout(wdd, wdd->timeout); - - writel(WDOG_CONTROL_REG_WDT_EN_MASK, - dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_arm_system_reset(dw_wdt); return 0; } @@ -152,16 +165,13 @@ static int dw_wdt_restart(struct watchdog_device *wdd, unsigned long action, void *data) { struct dw_wdt *dw_wdt = to_dw_wdt(wdd); - u32 val; writel(0, dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET); - val = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); - if (val & WDOG_CONTROL_REG_WDT_EN_MASK) + if (dw_wdt_is_enabled(dw_wdt)) writel(WDOG_COUNTER_RESTART_KICK_VALUE, dw_wdt->regs + WDOG_COUNTER_RESTART_REG_OFFSET); else - writel(WDOG_CONTROL_REG_WDT_EN_MASK, - dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_arm_system_reset(dw_wdt); /* wait for reset to assert... */ mdelay(500); @@ -198,6 +208,9 @@ static int dw_wdt_suspend(struct device *dev) { struct dw_wdt *dw_wdt = dev_get_drvdata(dev); + dw_wdt->control = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt->timeout = readl(dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET); + clk_disable_unprepare(dw_wdt->clk); return 0; @@ -211,6 +224,9 @@ static int dw_wdt_resume(struct device *dev) if (err) return err; + writel(dw_wdt->timeout, dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET); + writel(dw_wdt->control, dw_wdt->regs + WDOG_CONTROL_REG_OFFSET); + dw_wdt_ping(&dw_wdt->wdd); return 0; diff --git a/drivers/watchdog/sprd_wdt.c b/drivers/watchdog/sprd_wdt.c index a8b280ff33e0..b4d484a42b70 100644 --- a/drivers/watchdog/sprd_wdt.c +++ b/drivers/watchdog/sprd_wdt.c @@ -154,8 +154,10 @@ static int sprd_wdt_enable(struct sprd_wdt *wdt) if (ret) return ret; ret = clk_prepare_enable(wdt->rtc_enable); - if (ret) + if (ret) { + clk_disable_unprepare(wdt->enable); return ret; + } sprd_wdt_unlock(wdt->base); val = readl_relaxed(wdt->base + SPRD_WDT_CTRL); |