diff options
Diffstat (limited to 'target/linux/gemini/patches-4.14/0019-watchdog-ftwdt010-Make-interrupt-optional.patch')
| -rw-r--r-- | target/linux/gemini/patches-4.14/0019-watchdog-ftwdt010-Make-interrupt-optional.patch | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-4.14/0019-watchdog-ftwdt010-Make-interrupt-optional.patch b/target/linux/gemini/patches-4.14/0019-watchdog-ftwdt010-Make-interrupt-optional.patch new file mode 100644 index 0000000000..23c4ab5c0d --- /dev/null +++ b/target/linux/gemini/patches-4.14/0019-watchdog-ftwdt010-Make-interrupt-optional.patch @@ -0,0 +1,93 @@ +From 4347a0b0699989b889857c9d4ccfbce339859f13 Mon Sep 17 00:00:00 2001 +From: Linus Walleij <linus.walleij@linaro.org> +Date: Mon, 16 Oct 2017 22:54:25 +0200 +Subject: [PATCH 19/31] watchdog: ftwdt010: Make interrupt optional + +The Moxart does not appear to be using the interrupt from the +watchdog timer, maybe it's not even routed, so as to support +more architectures with this driver, make the interrupt +optional. + +While we are at it: actually enable the use of the interrupt +if present by setting the right bit in the control register +and define the missing control register bits. + +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +Reviewed-by: Guenter Roeck <linux@roeck-us.net> +Signed-off-by: Guenter Roeck <linux@roeck-us.net> +Signed-off-by: Wim Van Sebroeck <wim@iguana.be> +--- + drivers/watchdog/ftwdt010_wdt.c | 30 ++++++++++++++++++------------ + 1 file changed, 18 insertions(+), 12 deletions(-) + +--- a/drivers/watchdog/ftwdt010_wdt.c ++++ b/drivers/watchdog/ftwdt010_wdt.c +@@ -30,6 +30,8 @@ + #define WDRESTART_MAGIC 0x5AB9 + + #define WDCR_CLOCK_5MHZ BIT(4) ++#define WDCR_WDEXT BIT(3) ++#define WDCR_WDINTR BIT(2) + #define WDCR_SYS_RST BIT(1) + #define WDCR_ENABLE BIT(0) + +@@ -39,6 +41,7 @@ struct ftwdt010_wdt { + struct watchdog_device wdd; + struct device *dev; + void __iomem *base; ++ bool has_irq; + }; + + static inline +@@ -50,14 +53,17 @@ struct ftwdt010_wdt *to_ftwdt010_wdt(str + static int ftwdt010_wdt_start(struct watchdog_device *wdd) + { + struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd); ++ u32 enable; + + writel(wdd->timeout * WDT_CLOCK, gwdt->base + FTWDT010_WDLOAD); + writel(WDRESTART_MAGIC, gwdt->base + FTWDT010_WDRESTART); + /* set clock before enabling */ +- writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST, +- gwdt->base + FTWDT010_WDCR); +- writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST | WDCR_ENABLE, +- gwdt->base + FTWDT010_WDCR); ++ enable = WDCR_CLOCK_5MHZ | WDCR_SYS_RST; ++ writel(enable, gwdt->base + FTWDT010_WDCR); ++ if (gwdt->has_irq) ++ enable |= WDCR_WDINTR; ++ enable |= WDCR_ENABLE; ++ writel(enable, gwdt->base + FTWDT010_WDCR); + + return 0; + } +@@ -133,10 +139,6 @@ static int ftwdt010_wdt_probe(struct pla + if (IS_ERR(gwdt->base)) + return PTR_ERR(gwdt->base); + +- irq = platform_get_irq(pdev, 0); +- if (!irq) +- return -EINVAL; +- + gwdt->dev = dev; + gwdt->wdd.info = &ftwdt010_wdt_info; + gwdt->wdd.ops = &ftwdt010_wdt_ops; +@@ -158,10 +160,14 @@ static int ftwdt010_wdt_probe(struct pla + writel(reg, gwdt->base + FTWDT010_WDCR); + } + +- ret = devm_request_irq(dev, irq, ftwdt010_wdt_interrupt, 0, +- "watchdog bark", gwdt); +- if (ret) +- return ret; ++ irq = platform_get_irq(pdev, 0); ++ if (irq) { ++ ret = devm_request_irq(dev, irq, ftwdt010_wdt_interrupt, 0, ++ "watchdog bark", gwdt); ++ if (ret) ++ return ret; ++ gwdt->has_irq = true; ++ } + + ret = devm_watchdog_register_device(dev, &gwdt->wdd); + if (ret) { |