diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.6/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.6/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.6/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch b/target/linux/brcm47xx/patches-3.6/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch new file mode 100644 index 0000000000..79bb962f78 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.6/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch @@ -0,0 +1,288 @@ +--- a/drivers/watchdog/bcm47xx_wdt.c ++++ b/drivers/watchdog/bcm47xx_wdt.c +@@ -3,6 +3,7 @@ + * + * Copyright (C) 2008 Aleksandar Radovanovic <biblbroks@sezampro.rs> + * Copyright (C) 2009 Matthieu CASTET <castet.matthieu@free.fr> ++ * Copyright (C) 2012 Hauke Mehrtens <hauke@hauke-m.de> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License +@@ -12,19 +13,19 @@ + + #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + ++#include <linux/bcm47xx_wdt.h> + #include <linux/bitops.h> + #include <linux/errno.h> + #include <linux/init.h> + #include <linux/kernel.h> + #include <linux/module.h> + #include <linux/moduleparam.h> ++#include <linux/platform_device.h> + #include <linux/reboot.h> + #include <linux/types.h> + #include <linux/watchdog.h> + #include <linux/timer.h> + #include <linux/jiffies.h> +-#include <linux/ssb/ssb_embedded.h> +-#include <asm/mach-bcm47xx/bcm47xx.h> + + #define DRV_NAME "bcm47xx_wdt" + +@@ -45,48 +46,19 @@ MODULE_PARM_DESC(nowayout, + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + #endif + +-static struct timer_list wdt_timer; +-static atomic_t ticks; +- +-static inline void bcm47xx_wdt_hw_start(void) ++static inline struct bcm47xx_wdt *bcm47xx_wdt_get(struct watchdog_device *wdd) + { +- /* this is 2,5s on 100Mhz clock and 2s on 133 Mhz */ +- switch (bcm47xx_bus_type) { +-#ifdef CONFIG_BCM47XX_SSB +- case BCM47XX_BUS_TYPE_SSB: +- ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0xfffffff); +- break; +-#endif +-#ifdef CONFIG_BCM47XX_BCMA +- case BCM47XX_BUS_TYPE_BCMA: +- bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, +- 0xfffffff); +- break; +-#endif +- } ++ return container_of(wdd, struct bcm47xx_wdt, wdd); + } + +-static inline int bcm47xx_wdt_hw_stop(void) ++static void bcm47xx_timer_tick(unsigned long data) + { +- switch (bcm47xx_bus_type) { +-#ifdef CONFIG_BCM47XX_SSB +- case BCM47XX_BUS_TYPE_SSB: +- return ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0); +-#endif +-#ifdef CONFIG_BCM47XX_BCMA +- case BCM47XX_BUS_TYPE_BCMA: +- bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0); +- return 0; +-#endif +- } +- return -EINVAL; +-} ++ struct bcm47xx_wdt *wdt = (struct bcm47xx_wdt *)data; ++ u32 next_tick = min(wdt->wdd.timeout * 1000, wdt->max_timer_ms); + +-static void bcm47xx_timer_tick(unsigned long unused) +-{ +- if (!atomic_dec_and_test(&ticks)) { +- bcm47xx_wdt_hw_start(); +- mod_timer(&wdt_timer, jiffies + HZ); ++ if (!atomic_dec_and_test(&wdt->soft_ticks)) { ++ wdt->timer_set_ms(wdt, next_tick); ++ mod_timer(&wdt->soft_timer, jiffies + HZ); + } else { + pr_crit("Watchdog will fire soon!!!\n"); + } +@@ -94,23 +66,29 @@ static void bcm47xx_timer_tick(unsigned + + static int bcm47xx_wdt_keepalive(struct watchdog_device *wdd) + { +- atomic_set(&ticks, wdt_time); ++ struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd); ++ ++ atomic_set(&wdt->soft_ticks, wdd->timeout); + + return 0; + } + + static int bcm47xx_wdt_start(struct watchdog_device *wdd) + { +- bcm47xx_wdt_pet(); +- bcm47xx_timer_tick(0); ++ struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd); ++ ++ bcm47xx_wdt_keepalive(wdd); ++ bcm47xx_timer_tick((unsigned long)wdt); + + return 0; + } + + static int bcm47xx_wdt_stop(struct watchdog_device *wdd) + { +- del_timer_sync(&wdt_timer); +- bcm47xx_wdt_hw_stop(); ++ struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd); ++ ++ del_timer_sync(&wdt->soft_timer); ++ wdt->timer_set(wdt, 0); + + return 0; + } +@@ -118,10 +96,13 @@ static int bcm47xx_wdt_stop(struct watch + static int bcm47xx_wdt_set_timeout(struct watchdog_device *wdd, + unsigned int new_time) + { +- if ((new_time <= 0) || (new_time > WDT_MAX_TIME)) ++ if (new_time < 1 || new_time > WDT_MAX_TIME) { ++ pr_warn("timeout value must be 1<=x<=%d, using %d\n", ++ WDT_MAX_TIME, new_time); + return -EINVAL; ++ } + +- wdt_time = new_time; ++ wdd->timeout = new_time; + return 0; + } + +@@ -135,8 +116,11 @@ static const struct watchdog_info bcm47x + static int bcm47xx_wdt_notify_sys(struct notifier_block *this, + unsigned long code, void *unused) + { ++ struct bcm47xx_wdt *wdt; ++ ++ wdt = container_of(this, struct bcm47xx_wdt, notifier); + if (code == SYS_DOWN || code == SYS_HALT) +- bcm47xx_wdt_stop(); ++ wdt->wdd.ops->stop(&wdt->wdd); + return NOTIFY_DONE; + } + +@@ -148,57 +132,72 @@ static struct watchdog_ops bcm47xx_wdt_o + .set_timeout = bcm47xx_wdt_set_timeout, + }; + +-static struct watchdog_device bcm47xx_wdt_wdd = { +- .info = &bcm47xx_wdt_info, +- .ops = &bcm47xx_wdt_ops, +-}; +- +-static struct notifier_block bcm47xx_wdt_notifier = { +- .notifier_call = bcm47xx_wdt_notify_sys, +-}; +- +-static int __init bcm47xx_wdt_init(void) ++static int __devinit bcm47xx_wdt_probe(struct platform_device *pdev) + { + int ret; ++ struct bcm47xx_wdt *wdt = dev_get_platdata(&pdev->dev); + +- if (bcm47xx_wdt_hw_stop() < 0) +- return -ENODEV; ++ if (!wdt) ++ return -ENXIO; + +- setup_timer(&wdt_timer, bcm47xx_timer_tick, 0L); ++ setup_timer(&wdt->soft_timer, bcm47xx_timer_tick, ++ (long unsigned int)wdt); + +- if (bcm47xx_wdt_settimeout(wdt_time)) { +- bcm47xx_wdt_settimeout(WDT_DEFAULT_TIME); +- 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); ++ wdt->wdd.ops = &bcm47xx_wdt_ops; ++ wdt->wdd.info = &bcm47xx_wdt_info; ++ wdt->wdd.timeout = WDT_DEFAULT_TIME; ++ ret = wdt->wdd.ops->set_timeout(&wdt->wdd, timeout); ++ if (ret) ++ goto err_timer; ++ watchdog_set_nowayout(&wdt->wdd, nowayout); ++ ++ wdt->notifier.notifier_call = &bcm47xx_wdt_notify_sys; + +- ret = register_reboot_notifier(&bcm47xx_wdt_notifier); ++ ret = register_reboot_notifier(&wdt->notifier); + if (ret) +- return ret; ++ goto err_timer; + +- ret = watchdog_register_device(&bcm47xx_wdt_wdd); +- if (ret) { +- unregister_reboot_notifier(&bcm47xx_wdt_notifier); +- return ret; +- } ++ ret = watchdog_register_device(&wdt->wdd); ++ if (ret) ++ goto err_notifier; + + pr_info("BCM47xx Watchdog Timer enabled (%d seconds%s)\n", + wdt_time, nowayout ? ", nowayout" : ""); + return 0; ++ ++err_notifier: ++ unregister_reboot_notifier(&wdt->notifier); ++err_timer: ++ del_timer_sync(&wdt->soft_timer); ++ ++ return ret; + } + +-static void __exit bcm47xx_wdt_exit(void) ++static int __devexit bcm47xx_wdt_remove(struct platform_device *pdev) + { +- watchdog_stop(&bcm47xx_wdt_wdd); +- watchdog_unregister_device(&bcm47xx_wdt_wdd); ++ struct bcm47xx_wdt *wdt = dev_get_platdata(&pdev->dev); ++ ++ if (!wdt) ++ return -ENXIO; ++ ++ watchdog_unregister_device(&wdt->wdd); ++ unregister_reboot_notifier(&wdt->notifier); + +- unregister_reboot_notifier(&bcm47xx_wdt_notifier); ++ return 0; + } + +-module_init(bcm47xx_wdt_init); +-module_exit(bcm47xx_wdt_exit); ++static struct platform_driver bcm47xx_wdt_driver = { ++ .driver = { ++ .owner = THIS_MODULE, ++ .name = "bcm47xx-wdt", ++ }, ++ .probe = bcm47xx_wdt_probe, ++ .remove = __devexit_p(bcm47xx_wdt_remove), ++}; ++ ++module_platform_driver(bcm47xx_wdt_driver); + + MODULE_AUTHOR("Aleksandar Radovanovic"); ++MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>"); + MODULE_DESCRIPTION("Watchdog driver for Broadcom BCM47xx"); + MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/include/linux/bcm47xx_wdt.h +@@ -0,0 +1,27 @@ ++#ifndef LINUX_BCM47XX_WDT_H_ ++#define LINUX_BCM47XX_WDT_H_ ++ ++#include <linux/notifier.h> ++#include <linux/timer.h> ++#include <linux/types.h> ++#include <linux/watchdog.h> ++ ++ ++struct bcm47xx_wdt { ++ u32 (*timer_set)(struct bcm47xx_wdt *, u32); ++ u32 (*timer_set_ms)(struct bcm47xx_wdt *, u32); ++ ++ void *driver_data; ++ ++ struct watchdog_device wdd; ++ struct notifier_block notifier; ++ ++ struct timer_list soft_timer; ++ atomic_t soft_ticks; ++}; ++ ++static inline void *bcm47xx_wdt_get_drvdata(struct bcm47xx_wdt *wdt) ++{ ++ return wdt->driver_data; ++} ++#endif /* LINUX_BCM47XX_WDT_H_ */ |