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Diffstat (limited to 'target/linux/brcm47xx/patches-3.8/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.8/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch283
1 files changed, 283 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.8/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch b/target/linux/brcm47xx/patches-3.8/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch
new file mode 100644
index 000000000..cb007601b
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.8/541-watchdog-bcm47xx_wdt.c-use-platform-device.patch
@@ -0,0 +1,283 @@
+--- 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"
+
+@@ -43,48 +44,19 @@ MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+-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");
+ }
+@@ -92,23 +64,29 @@ 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;
+ }
+@@ -116,10 +94,13 @@ 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;
+ }
+
+@@ -133,8 +114,11 @@ 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;
+ }
+
+@@ -146,56 +130,72 @@ 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 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 bcm47xx_wdt_remove(struct platform_device *pdev)
+ {
+- 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 = 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");
+--- a/include/linux/bcm47xx_wdt.h
++++ b/include/linux/bcm47xx_wdt.h
+@@ -1,7 +1,10 @@
+ #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 {
+@@ -10,6 +13,12 @@ struct bcm47xx_wdt {
+ u32 max_timer_ms;
+
+ 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)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 23:50:14 +0000