diff options
Diffstat (limited to 'target/linux')
2 files changed, 150 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.10/111-watchdog-max63xx_wdt-Add-support-for-specifying-WDI-.patch b/target/linux/generic/pending-5.10/111-watchdog-max63xx_wdt-Add-support-for-specifying-WDI-.patch new file mode 100644 index 0000000000..d2e134a132 --- /dev/null +++ b/target/linux/generic/pending-5.10/111-watchdog-max63xx_wdt-Add-support-for-specifying-WDI-.patch @@ -0,0 +1,75 @@ +From bd1b9f66d5134e518419f4c4dacf1884c1616983 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Thu, 28 Apr 2022 11:13:23 +0200 +Subject: [PATCH] watchdog: max63xx_wdt: Add support for specifying WDI logic + via GPIO +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +On some boards is WDI logic of max6370 chip connected via GPIO. +So extend max63xx_wdt driver to allow specifying WDI logic via GPIO. + +Signed-off-by: Pali Rohár <pali@kernel.org> +--- + drivers/watchdog/max63xx_wdt.c | 24 ++++++++++++++++++++++++ + 1 file changed, 24 insertions(+) + +--- a/drivers/watchdog/max63xx_wdt.c ++++ b/drivers/watchdog/max63xx_wdt.c +@@ -26,6 +26,7 @@ + #include <linux/spinlock.h> + #include <linux/io.h> + #include <linux/slab.h> ++#include <linux/gpio/consumer.h> + + #define DEFAULT_HEARTBEAT 60 + #define MAX_HEARTBEAT 60 +@@ -52,6 +53,9 @@ struct max63xx_wdt { + void __iomem *base; + spinlock_t lock; + ++ /* GPIOs */ ++ struct gpio_desc *gpio_wdi; ++ + /* WDI and WSET bits write access routines */ + void (*ping)(struct max63xx_wdt *wdt); + void (*set)(struct max63xx_wdt *wdt, u8 set); +@@ -157,6 +161,17 @@ static const struct watchdog_info max63x + .identity = "max63xx Watchdog", + }; + ++static void max63xx_gpio_ping(struct max63xx_wdt *wdt) ++{ ++ spin_lock(&wdt->lock); ++ ++ gpiod_set_value(wdt->gpio_wdi, 1); ++ udelay(1); ++ gpiod_set_value(wdt->gpio_wdi, 0); ++ ++ spin_unlock(&wdt->lock); ++} ++ + static void max63xx_mmap_ping(struct max63xx_wdt *wdt) + { + u8 val; +@@ -221,10 +236,19 @@ static int max63xx_wdt_probe(struct plat + return -EINVAL; + } + ++ wdt->gpio_wdi = devm_gpiod_get(dev, NULL, GPIOD_FLAGS_BIT_DIR_OUT); ++ if (IS_ERR(wdt->gpio_wdi) && PTR_ERR(wdt->gpio_wdi) != -ENOENT) ++ return dev_err_probe(dev, PTR_ERR(wdt->gpio_wdi), ++ "unable to request gpio: %ld\n", ++ PTR_ERR(wdt->gpio_wdi)); ++ + err = max63xx_mmap_init(pdev, wdt); + if (err) + return err; + ++ if (!IS_ERR(wdt->gpio_wdi)) ++ wdt->ping = max63xx_gpio_ping; ++ + platform_set_drvdata(pdev, &wdt->wdd); + watchdog_set_drvdata(&wdt->wdd, wdt); + diff --git a/target/linux/generic/pending-5.15/111-watchdog-max63xx_wdt-Add-support-for-specifying-WDI-.patch b/target/linux/generic/pending-5.15/111-watchdog-max63xx_wdt-Add-support-for-specifying-WDI-.patch new file mode 100644 index 0000000000..d6b10491f8 --- /dev/null +++ b/target/linux/generic/pending-5.15/111-watchdog-max63xx_wdt-Add-support-for-specifying-WDI-.patch @@ -0,0 +1,75 @@ +From bd1b9f66d5134e518419f4c4dacf1884c1616983 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Thu, 28 Apr 2022 11:13:23 +0200 +Subject: [PATCH] watchdog: max63xx_wdt: Add support for specifying WDI logic + via GPIO +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +On some boards is WDI logic of max6370 chip connected via GPIO. +So extend max63xx_wdt driver to allow specifying WDI logic via GPIO. + +Signed-off-by: Pali Rohár <pali@kernel.org> +--- + drivers/watchdog/max63xx_wdt.c | 24 ++++++++++++++++++++++++ + 1 file changed, 24 insertions(+) + +--- a/drivers/watchdog/max63xx_wdt.c ++++ b/drivers/watchdog/max63xx_wdt.c +@@ -27,6 +27,7 @@ + #include <linux/io.h> + #include <linux/slab.h> + #include <linux/property.h> ++#include <linux/gpio/consumer.h> + + #define DEFAULT_HEARTBEAT 60 + #define MAX_HEARTBEAT 60 +@@ -53,6 +54,9 @@ struct max63xx_wdt { + void __iomem *base; + spinlock_t lock; + ++ /* GPIOs */ ++ struct gpio_desc *gpio_wdi; ++ + /* WDI and WSET bits write access routines */ + void (*ping)(struct max63xx_wdt *wdt); + void (*set)(struct max63xx_wdt *wdt, u8 set); +@@ -158,6 +162,17 @@ static const struct watchdog_info max63x + .identity = "max63xx Watchdog", + }; + ++static void max63xx_gpio_ping(struct max63xx_wdt *wdt) ++{ ++ spin_lock(&wdt->lock); ++ ++ gpiod_set_value(wdt->gpio_wdi, 1); ++ udelay(1); ++ gpiod_set_value(wdt->gpio_wdi, 0); ++ ++ spin_unlock(&wdt->lock); ++} ++ + static void max63xx_mmap_ping(struct max63xx_wdt *wdt) + { + u8 val; +@@ -225,10 +240,19 @@ static int max63xx_wdt_probe(struct plat + return -EINVAL; + } + ++ wdt->gpio_wdi = devm_gpiod_get(dev, NULL, GPIOD_FLAGS_BIT_DIR_OUT); ++ if (IS_ERR(wdt->gpio_wdi) && PTR_ERR(wdt->gpio_wdi) != -ENOENT) ++ return dev_err_probe(dev, PTR_ERR(wdt->gpio_wdi), ++ "unable to request gpio: %ld\n", ++ PTR_ERR(wdt->gpio_wdi)); ++ + err = max63xx_mmap_init(pdev, wdt); + if (err) + return err; + ++ if (!IS_ERR(wdt->gpio_wdi)) ++ wdt->ping = max63xx_gpio_ping; ++ + platform_set_drvdata(pdev, &wdt->wdd); + watchdog_set_drvdata(&wdt->wdd, wdt); + |