diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.8/540-watchdog-bcm47xx_wdt.c-convert-to-watchdog-core-api.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.8/540-watchdog-bcm47xx_wdt.c-convert-to-watchdog-core-api.patch | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.8/540-watchdog-bcm47xx_wdt.c-convert-to-watchdog-core-api.patch b/target/linux/brcm47xx/patches-3.8/540-watchdog-bcm47xx_wdt.c-convert-to-watchdog-core-api.patch new file mode 100644 index 000000000..7de4de1b8 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.8/540-watchdog-bcm47xx_wdt.c-convert-to-watchdog-core-api.patch @@ -0,0 +1,258 @@ +--- a/drivers/watchdog/Kconfig ++++ b/drivers/watchdog/Kconfig +@@ -971,6 +971,7 @@ config ATH79_WDT + config BCM47XX_WDT + tristate "Broadcom BCM47xx Watchdog Timer" + depends on BCM47XX ++ select WATCHDOG_CORE + help + Hardware driver for the Broadcom BCM47xx Watchdog Timer. + +--- a/drivers/watchdog/bcm47xx_wdt.c ++++ b/drivers/watchdog/bcm47xx_wdt.c +@@ -14,15 +14,12 @@ + + #include <linux/bitops.h> + #include <linux/errno.h> +-#include <linux/fs.h> + #include <linux/init.h> + #include <linux/kernel.h> +-#include <linux/miscdevice.h> + #include <linux/module.h> + #include <linux/moduleparam.h> + #include <linux/reboot.h> + #include <linux/types.h> +-#include <linux/uaccess.h> + #include <linux/watchdog.h> + #include <linux/timer.h> + #include <linux/jiffies.h> +@@ -41,15 +38,11 @@ module_param(wdt_time, int, 0); + MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default=" + __MODULE_STRING(WDT_DEFAULT_TIME) ")"); + +-#ifdef CONFIG_WATCHDOG_NOWAYOUT + module_param(nowayout, bool, 0); + MODULE_PARM_DESC(nowayout, + "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +-#endif + +-static unsigned long bcm47xx_wdt_busy; +-static char expect_release; + static struct timer_list wdt_timer; + static atomic_t ticks; + +@@ -97,29 +90,31 @@ static void bcm47xx_timer_tick(unsigned + } + } + +-static inline void bcm47xx_wdt_pet(void) ++static int bcm47xx_wdt_keepalive(struct watchdog_device *wdd) + { + atomic_set(&ticks, wdt_time); ++ ++ return 0; + } + +-static void bcm47xx_wdt_start(void) ++static int bcm47xx_wdt_start(struct watchdog_device *wdd) + { + bcm47xx_wdt_pet(); + bcm47xx_timer_tick(0); ++ ++ return 0; + } + +-static void bcm47xx_wdt_pause(void) ++static int bcm47xx_wdt_stop(struct watchdog_device *wdd) + { + del_timer_sync(&wdt_timer); + bcm47xx_wdt_hw_stop(); +-} + +-static void bcm47xx_wdt_stop(void) +-{ +- bcm47xx_wdt_pause(); ++ return 0; + } + +-static int bcm47xx_wdt_settimeout(int new_time) ++static int bcm47xx_wdt_set_timeout(struct watchdog_device *wdd, ++ unsigned int new_time) + { + if ((new_time <= 0) || (new_time > WDT_MAX_TIME)) + return -EINVAL; +@@ -128,51 +123,6 @@ static int bcm47xx_wdt_settimeout(int ne + return 0; + } + +-static int bcm47xx_wdt_open(struct inode *inode, struct file *file) +-{ +- if (test_and_set_bit(0, &bcm47xx_wdt_busy)) +- return -EBUSY; +- +- bcm47xx_wdt_start(); +- return nonseekable_open(inode, file); +-} +- +-static int bcm47xx_wdt_release(struct inode *inode, struct file *file) +-{ +- if (expect_release == 42) { +- bcm47xx_wdt_stop(); +- } else { +- pr_crit("Unexpected close, not stopping watchdog!\n"); +- bcm47xx_wdt_start(); +- } +- +- clear_bit(0, &bcm47xx_wdt_busy); +- expect_release = 0; +- return 0; +-} +- +-static ssize_t bcm47xx_wdt_write(struct file *file, const char __user *data, +- size_t len, loff_t *ppos) +-{ +- if (len) { +- if (!nowayout) { +- size_t i; +- +- expect_release = 0; +- +- for (i = 0; i != len; i++) { +- char c; +- if (get_user(c, data + i)) +- return -EFAULT; +- if (c == 'V') +- expect_release = 42; +- } +- } +- bcm47xx_wdt_pet(); +- } +- return len; +-} +- + static const struct watchdog_info bcm47xx_wdt_info = { + .identity = DRV_NAME, + .options = WDIOF_SETTIMEOUT | +@@ -180,80 +130,25 @@ static const struct watchdog_info bcm47x + WDIOF_MAGICCLOSE, + }; + +-static long bcm47xx_wdt_ioctl(struct file *file, +- unsigned int cmd, unsigned long arg) +-{ +- void __user *argp = (void __user *)arg; +- int __user *p = argp; +- int new_value, retval = -EINVAL; +- +- switch (cmd) { +- case WDIOC_GETSUPPORT: +- return copy_to_user(argp, &bcm47xx_wdt_info, +- sizeof(bcm47xx_wdt_info)) ? -EFAULT : 0; +- +- case WDIOC_GETSTATUS: +- case WDIOC_GETBOOTSTATUS: +- return put_user(0, p); +- +- case WDIOC_SETOPTIONS: +- if (get_user(new_value, p)) +- return -EFAULT; +- +- if (new_value & WDIOS_DISABLECARD) { +- bcm47xx_wdt_stop(); +- retval = 0; +- } +- +- if (new_value & WDIOS_ENABLECARD) { +- bcm47xx_wdt_start(); +- retval = 0; +- } +- +- return retval; +- +- case WDIOC_KEEPALIVE: +- bcm47xx_wdt_pet(); +- return 0; +- +- case WDIOC_SETTIMEOUT: +- if (get_user(new_value, p)) +- return -EFAULT; +- +- if (bcm47xx_wdt_settimeout(new_value)) +- return -EINVAL; +- +- bcm47xx_wdt_pet(); +- +- case WDIOC_GETTIMEOUT: +- return put_user(wdt_time, p); +- +- default: +- return -ENOTTY; +- } +-} +- + static int bcm47xx_wdt_notify_sys(struct notifier_block *this, +- unsigned long code, void *unused) ++ unsigned long code, void *unused) + { + if (code == SYS_DOWN || code == SYS_HALT) + bcm47xx_wdt_stop(); + return NOTIFY_DONE; + } + +-static const struct file_operations bcm47xx_wdt_fops = { ++static struct watchdog_ops bcm47xx_wdt_ops = { + .owner = THIS_MODULE, +- .llseek = no_llseek, +- .unlocked_ioctl = bcm47xx_wdt_ioctl, +- .open = bcm47xx_wdt_open, +- .release = bcm47xx_wdt_release, +- .write = bcm47xx_wdt_write, ++ .start = bcm47xx_wdt_start, ++ .stop = bcm47xx_wdt_stop, ++ .ping = bcm47xx_wdt_keepalive, ++ .set_timeout = bcm47xx_wdt_set_timeout, + }; + +-static struct miscdevice bcm47xx_wdt_miscdev = { +- .minor = WATCHDOG_MINOR, +- .name = "watchdog", +- .fops = &bcm47xx_wdt_fops, ++static struct watchdog_device bcm47xx_wdt_wdd = { ++ .info = &bcm47xx_wdt_info, ++ .ops = &bcm47xx_wdt_ops, + }; + + static struct notifier_block bcm47xx_wdt_notifier = { +@@ -274,12 +169,13 @@ static int __init bcm47xx_wdt_init(void) + pr_info("wdt_time value must be 0 < wdt_time < %d, using %d\n", + (WDT_MAX_TIME + 1), wdt_time); + } ++ watchdog_set_nowayout(&bcm47xx_wdt_wdd, nowayout); + + ret = register_reboot_notifier(&bcm47xx_wdt_notifier); + if (ret) + return ret; + +- ret = misc_register(&bcm47xx_wdt_miscdev); ++ ret = watchdog_register_device(&bcm47xx_wdt_wdd); + if (ret) { + unregister_reboot_notifier(&bcm47xx_wdt_notifier); + return ret; +@@ -292,10 +188,7 @@ static int __init bcm47xx_wdt_init(void) + + static void __exit bcm47xx_wdt_exit(void) + { +- if (!nowayout) +- bcm47xx_wdt_stop(); +- +- misc_deregister(&bcm47xx_wdt_miscdev); ++ watchdog_unregister_device(&bcm47xx_wdt_wdd); + + unregister_reboot_notifier(&bcm47xx_wdt_notifier); + } +@@ -306,4 +199,3 @@ module_exit(bcm47xx_wdt_exit); + MODULE_AUTHOR("Aleksandar Radovanovic"); + MODULE_DESCRIPTION("Watchdog driver for Broadcom BCM47xx"); + MODULE_LICENSE("GPL"); +-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |