diff options
Diffstat (limited to 'target/linux/cns3xxx/patches-4.19/020-watchdog_support.patch')
| -rw-r--r-- | target/linux/cns3xxx/patches-4.19/020-watchdog_support.patch | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/target/linux/cns3xxx/patches-4.19/020-watchdog_support.patch b/target/linux/cns3xxx/patches-4.19/020-watchdog_support.patch deleted file mode 100644 index e626ff29b7..0000000000 --- a/target/linux/cns3xxx/patches-4.19/020-watchdog_support.patch +++ /dev/null @@ -1,184 +0,0 @@ -Add a watchdog driver for ARM MPcore processors. - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- a/drivers/watchdog/Kconfig -+++ b/drivers/watchdog/Kconfig -@@ -375,6 +375,13 @@ config KS8695_WATCHDOG - Watchdog timer embedded into KS8695 processor. This will reboot your - system when the timeout is reached. - -+config MPCORE_WATCHDOG -+ tristate "MPcore watchdog" -+ depends on HAVE_ARM_TWD -+ select WATCHDOG_CORE -+ help -+ Watchdog timer embedded into the MPcore system -+ - config HAVE_S3C2410_WATCHDOG - bool - help ---- a/drivers/watchdog/Makefile -+++ b/drivers/watchdog/Makefile -@@ -49,6 +49,7 @@ obj-$(CONFIG_977_WATCHDOG) += wdt977.o - obj-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o - obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o - obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o -+obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o - obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o - obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o - obj-$(CONFIG_SAMA5D4_WATCHDOG) += sama5d4_wdt.o ---- /dev/null -+++ b/drivers/watchdog/mpcore_wdt.c -@@ -0,0 +1,118 @@ -+/* -+ * Watchdog driver for ARM MPcore -+ * -+ * Copyright (C) 2017 Felix Fietkau <nbd@nbd.name> -+ */ -+ -+#include <linux/export.h> -+#include <linux/module.h> -+#include <linux/kernel.h> -+#include <linux/watchdog.h> -+#include <linux/platform_device.h> -+#include <linux/io.h> -+#include <asm/smp_twd.h> -+ -+static void __iomem *wdt_base; -+static int wdt_timeout = 60; -+ -+static int mpcore_wdt_keepalive(struct watchdog_device *wdd) -+{ -+ static int perturb; -+ u32 count; -+ -+ count = (twd_timer_get_rate() / 256) * wdt_timeout; -+ -+ /* Reload register needs a different value on each refresh */ -+ count += perturb; -+ perturb = !perturb; -+ -+ iowrite32(count, wdt_base + TWD_WDOG_LOAD); -+ -+ return 0; -+} -+ -+static int mpcore_wdt_start(struct watchdog_device *wdd) -+{ -+ mpcore_wdt_keepalive(wdd); -+ -+ /* prescale = 256, mode = 1, enable = 1 */ -+ iowrite32(0x0000FF09, wdt_base + TWD_WDOG_CONTROL); -+ -+ return 0; -+} -+ -+static int mpcore_wdt_stop(struct watchdog_device *wdd) -+{ -+ iowrite32(0x12345678, wdt_base + TWD_WDOG_DISABLE); -+ iowrite32(0x87654321, wdt_base + TWD_WDOG_DISABLE); -+ iowrite32(0x0, wdt_base + TWD_WDOG_CONTROL); -+ -+ return 0; -+} -+ -+static int mpcore_wdt_set_timeout(struct watchdog_device *wdd, -+ unsigned int timeout) -+{ -+ mpcore_wdt_stop(wdd); -+ wdt_timeout = timeout; -+ mpcore_wdt_start(wdd); -+ -+ return 0; -+} -+ -+static const struct watchdog_info mpcore_wdt_info = { -+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, -+ .identity = "MPcore Watchdog", -+}; -+ -+static const struct watchdog_ops mpcore_wdt_ops = { -+ .owner = THIS_MODULE, -+ .start = mpcore_wdt_start, -+ .stop = mpcore_wdt_stop, -+ .ping = mpcore_wdt_keepalive, -+ .set_timeout = mpcore_wdt_set_timeout, -+}; -+ -+static struct watchdog_device mpcore_wdt = { -+ .info = &mpcore_wdt_info, -+ .ops = &mpcore_wdt_ops, -+ .min_timeout = 1, -+ .max_timeout = 65535, -+}; -+ -+static int mpcore_wdt_probe(struct platform_device *pdev) -+{ -+ struct resource *res; -+ unsigned long rate = twd_timer_get_rate(); -+ -+ pr_info("MPCore WD init. clockrate: %lu prescaler: %u countrate: %lu timeout: %us\n", rate, 256, rate / 256, wdt_timeout); -+ -+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ if (!res) -+ return -ENODEV; -+ -+ wdt_base = devm_ioremap_resource(&pdev->dev, res); -+ if (IS_ERR(wdt_base)) -+ return PTR_ERR(wdt_base); -+ -+ watchdog_register_device(&mpcore_wdt); -+ return 0; -+} -+ -+static int mpcore_wdt_remove(struct platform_device *dev) -+{ -+ watchdog_unregister_device(&mpcore_wdt); -+ return 0; -+} -+ -+static struct platform_driver mpcore_wdt_driver = { -+ .probe = mpcore_wdt_probe, -+ .remove = mpcore_wdt_remove, -+ .driver = { -+ .name = "mpcore_wdt", -+ }, -+}; -+ -+module_platform_driver(mpcore_wdt_driver); -+MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>"); -+MODULE_LICENSE("GPL"); ---- a/arch/arm/include/asm/smp_twd.h -+++ b/arch/arm/include/asm/smp_twd.h -@@ -34,5 +34,6 @@ struct twd_local_timer name __initdata = - }; - - int twd_local_timer_register(struct twd_local_timer *); -+unsigned long twd_timer_get_rate(void); - - #endif ---- a/arch/arm/kernel/smp_twd.c -+++ b/arch/arm/kernel/smp_twd.c -@@ -15,6 +15,7 @@ - #include <linux/delay.h> - #include <linux/device.h> - #include <linux/err.h> -+#include <linux/export.h> - #include <linux/smp.h> - #include <linux/jiffies.h> - #include <linux/clockchips.h> -@@ -380,6 +381,14 @@ int __init twd_local_timer_register(stru - return twd_local_timer_common_register(NULL); - } - -+/* Needed by mpcore_wdt */ -+unsigned long twd_timer_get_rate(void) -+{ -+ return twd_timer_rate; -+} -+EXPORT_SYMBOL_GPL(twd_timer_get_rate); -+ -+ - #ifdef CONFIG_OF - static int __init twd_local_timer_of_register(struct device_node *np) - { |