diff options
Diffstat (limited to 'target')
3 files changed, 360 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-2.6.38/530-cbus-retu-wdt-preemptible.patch b/target/linux/omap24xx/patches-2.6.38/530-cbus-retu-wdt-preemptible.patch new file mode 100644 index 000000000..fecbd09a7 --- /dev/null +++ b/target/linux/omap24xx/patches-2.6.38/530-cbus-retu-wdt-preemptible.patch @@ -0,0 +1,127 @@ +Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c +=================================================================== +--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-02 16:08:59.022211654 +0100 ++++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-02 16:29:43.215284501 +0100 +@@ -58,13 +58,11 @@ struct retu_wdt_dev { + struct device *dev; + int users; + struct miscdevice retu_wdt_miscdev; +- struct timer_list ping_timer; ++ struct delayed_work ping_work; + }; + + static struct retu_wdt_dev *retu_wdt; + +-static void retu_wdt_set_ping_timer(unsigned long enable); +- + static int _retu_modify_counter(unsigned int new) + { + if (retu_wdt) +@@ -86,6 +84,31 @@ static int retu_modify_counter(unsigned + return 0; + } + ++/* ++ * Since retu watchdog cannot be disabled in hardware, we must kick it ++ * with a timer until userspace watchdog software takes over. Do this ++ * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set. ++ */ ++static void retu_wdt_ping_enable(struct retu_wdt_dev *wdev) ++{ ++ _retu_modify_counter(RETU_WDT_MAX_TIMER); ++ schedule_delayed_work(&wdev->ping_work, ++ round_jiffies_relative(RETU_WDT_DEFAULT_TIMER * HZ)); ++} ++ ++static void retu_wdt_ping_disable(struct retu_wdt_dev *wdev) ++{ ++ _retu_modify_counter(RETU_WDT_MAX_TIMER); ++ cancel_delayed_work_sync(&wdev->ping_work); ++} ++ ++static void retu_wdt_ping_work(struct work_struct *work) ++{ ++ struct retu_wdt_dev *wdev = container_of(to_delayed_work(work), ++ struct retu_wdt_dev, ping_work); ++ retu_wdt_ping_enable(wdev); ++} ++ + static ssize_t retu_wdt_period_show(struct device *dev, + struct device_attribute *attr, char *buf) + { +@@ -105,7 +128,7 @@ static ssize_t retu_wdt_period_store(str + int ret; + + #ifdef CONFIG_WATCHDOG_NOWAYOUT +- retu_wdt_set_ping_timer(0); ++ retu_wdt_ping_disable(retu_wdt); + #endif + + if (sscanf(buf, "%u", &new_period) != 1) { +@@ -136,30 +159,13 @@ static DEVICE_ATTR(period, S_IRUGO | S_I + retu_wdt_period_store); + static DEVICE_ATTR(counter, S_IRUGO, retu_wdt_counter_show, NULL); + +-/*----------------------------------------------------------------------------*/ +- +-/* +- * Since retu watchdog cannot be disabled in hardware, we must kick it +- * with a timer until userspace watchdog software takes over. Do this +- * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set. +- */ +-static void retu_wdt_set_ping_timer(unsigned long enable) +-{ +- _retu_modify_counter(RETU_WDT_MAX_TIMER); +- if (enable) +- mod_timer(&retu_wdt->ping_timer, +- jiffies + RETU_WDT_DEFAULT_TIMER * HZ); +- else +- del_timer_sync(&retu_wdt->ping_timer); +-} +- + static int retu_wdt_open(struct inode *inode, struct file *file) + { + if (test_and_set_bit(1, (unsigned long *)&(retu_wdt->users))) + return -EBUSY; + + file->private_data = (void *)retu_wdt; +- retu_wdt_set_ping_timer(0); ++ retu_wdt_ping_disable(retu_wdt); + + return nonseekable_open(inode, file); + } +@@ -169,7 +175,7 @@ static int retu_wdt_release(struct inode + struct retu_wdt_dev *wdev = file->private_data; + + #ifndef CONFIG_WATCHDOG_NOWAYOUT +- retu_wdt_set_ping_timer(1); ++ retu_wdt_ping_enable(retu_wdt); + #endif + wdev->users = 0; + +@@ -232,7 +238,7 @@ static int __devinit retu_wdt_ping(void) + #ifdef CONFIG_WATCHDOG_NOWAYOUT + retu_modify_counter(RETU_WDT_MAX_TIMER); + #else +- retu_wdt_set_ping_timer(1); ++ retu_wdt_ping_enable(retu_wdt); + #endif + + return 0; +@@ -283,7 +289,7 @@ static int __init retu_wdt_probe(struct + if (ret) + goto free3; + +- setup_timer(&wdev->ping_timer, retu_wdt_set_ping_timer, 1); ++ INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work); + + /* passed as module parameter? */ + ret = retu_modify_counter(counter_param); +@@ -326,6 +332,7 @@ static int __devexit retu_wdt_remove(str + misc_deregister(&wdev->retu_wdt_miscdev); + device_remove_file(&pdev->dev, &dev_attr_period); + device_remove_file(&pdev->dev, &dev_attr_counter); ++ cancel_delayed_work_sync(&wdev->ping_work); + kfree(wdev); + + return 0; diff --git a/target/linux/omap24xx/patches-2.6.38/531-cbus-retu-wdt-fix-bitfield.patch b/target/linux/omap24xx/patches-2.6.38/531-cbus-retu-wdt-fix-bitfield.patch new file mode 100644 index 000000000..6de2c79f1 --- /dev/null +++ b/target/linux/omap24xx/patches-2.6.38/531-cbus-retu-wdt-fix-bitfield.patch @@ -0,0 +1,39 @@ +Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c +=================================================================== +--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-02 16:46:24.574676092 +0100 ++++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-02 16:48:17.469807413 +0100 +@@ -56,7 +56,7 @@ static int counter_param = RETU_WDT_MAX_ + + struct retu_wdt_dev { + struct device *dev; +- int users; ++ unsigned long users; + struct miscdevice retu_wdt_miscdev; + struct delayed_work ping_work; + }; +@@ -161,7 +161,7 @@ static DEVICE_ATTR(counter, S_IRUGO, ret + + static int retu_wdt_open(struct inode *inode, struct file *file) + { +- if (test_and_set_bit(1, (unsigned long *)&(retu_wdt->users))) ++ if (test_and_set_bit(0, &retu_wdt->users)) + return -EBUSY; + + file->private_data = (void *)retu_wdt; +@@ -177,7 +177,7 @@ static int retu_wdt_release(struct inode + #ifndef CONFIG_WATCHDOG_NOWAYOUT + retu_wdt_ping_enable(retu_wdt); + #endif +- wdev->users = 0; ++ clear_bit(0, &retu_wdt->users); + + return 0; + } +@@ -264,7 +264,6 @@ static int __init retu_wdt_probe(struct + return -ENOMEM; + + wdev->dev = &pdev->dev; +- wdev->users = 0; + + ret = device_create_file(&pdev->dev, &dev_attr_period); + if (ret) { diff --git a/target/linux/omap24xx/patches-2.6.38/535-cbus-retu-wdt-cleanup.patch b/target/linux/omap24xx/patches-2.6.38/535-cbus-retu-wdt-cleanup.patch new file mode 100644 index 000000000..4b650686f --- /dev/null +++ b/target/linux/omap24xx/patches-2.6.38/535-cbus-retu-wdt-cleanup.patch @@ -0,0 +1,194 @@ +Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c +=================================================================== +--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-02 16:49:51.231863891 +0100 ++++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-02 16:53:47.189454637 +0100 +@@ -52,7 +52,6 @@ static DEFINE_MUTEX(retu_wdt_mutex); + + /* Current period of watchdog */ + static unsigned int period_val = RETU_WDT_DEFAULT_TIMER; +-static int counter_param = RETU_WDT_MAX_TIMER; + + struct retu_wdt_dev { + struct device *dev; +@@ -109,56 +108,6 @@ static void retu_wdt_ping_work(struct wo + retu_wdt_ping_enable(wdev); + } + +-static ssize_t retu_wdt_period_show(struct device *dev, +- struct device_attribute *attr, char *buf) +-{ +- /* Show current max counter */ +- return sprintf(buf, "%u\n", (u16)period_val); +-} +- +-/* +- * Note: This inteface is non-standard and likely to disappear! +- * Use /dev/watchdog instead, that's the standard. +- */ +-static ssize_t retu_wdt_period_store(struct device *dev, +- struct device_attribute *attr, +- const char *buf, size_t count) +-{ +- unsigned int new_period; +- int ret; +- +-#ifdef CONFIG_WATCHDOG_NOWAYOUT +- retu_wdt_ping_disable(retu_wdt); +-#endif +- +- if (sscanf(buf, "%u", &new_period) != 1) { +- printk(KERN_ALERT "retu_wdt_period_store: Invalid input\n"); +- return -EINVAL; +- } +- +- ret = retu_modify_counter(new_period); +- if (ret < 0) +- return ret; +- +- return strnlen(buf, count); +-} +- +-static ssize_t retu_wdt_counter_show(struct device *dev, +- struct device_attribute *attr, char *buf) +-{ +- u16 counter; +- +- /* Show current value in watchdog counter */ +- counter = retu_read_reg(dev, RETU_REG_WATCHDOG); +- +- /* Only the 5 LSB are important */ +- return snprintf(buf, PAGE_SIZE, "%u\n", (counter & 0x3F)); +-} +- +-static DEVICE_ATTR(period, S_IRUGO | S_IWUSR, retu_wdt_period_show, \ +- retu_wdt_period_store); +-static DEVICE_ATTR(counter, S_IRUGO, retu_wdt_counter_show, NULL); +- + static int retu_wdt_open(struct inode *inode, struct file *file) + { + if (test_and_set_bit(0, &retu_wdt->users)) +@@ -175,9 +124,9 @@ static int retu_wdt_release(struct inode + struct retu_wdt_dev *wdev = file->private_data; + + #ifndef CONFIG_WATCHDOG_NOWAYOUT +- retu_wdt_ping_enable(retu_wdt); ++ retu_wdt_ping_enable(wdev); + #endif +- clear_bit(0, &retu_wdt->users); ++ clear_bit(0, &wdev->users); + + return 0; + } +@@ -232,18 +181,6 @@ static long retu_wdt_ioctl(struct file * + return 0; + } + +-/* Start kicking retu watchdog until user space starts doing the kicking */ +-static int __devinit retu_wdt_ping(void) +-{ +-#ifdef CONFIG_WATCHDOG_NOWAYOUT +- retu_modify_counter(RETU_WDT_MAX_TIMER); +-#else +- retu_wdt_ping_enable(retu_wdt); +-#endif +- +- return 0; +-} +- + static const struct file_operations retu_wdt_fops = { + .owner = THIS_MODULE, + .write = retu_wdt_write, +@@ -252,8 +189,6 @@ static const struct file_operations retu + .release = retu_wdt_release, + }; + +-/*----------------------------------------------------------------------------*/ +- + static int __init retu_wdt_probe(struct platform_device *pdev) + { + struct retu_wdt_dev *wdev; +@@ -265,18 +200,6 @@ static int __init retu_wdt_probe(struct + + wdev->dev = &pdev->dev; + +- ret = device_create_file(&pdev->dev, &dev_attr_period); +- if (ret) { +- dev_err(&pdev->dev, "Error creating sysfs period\n"); +- goto free1; +- } +- +- ret = device_create_file(&pdev->dev, &dev_attr_counter); +- if (ret) { +- dev_err(&pdev->dev, "Error creating sysfs counter\n"); +- goto free2; +- } +- + platform_set_drvdata(pdev, wdev); + retu_wdt = wdev; + wdev->retu_wdt_miscdev.parent = &pdev->dev; +@@ -286,38 +209,21 @@ static int __init retu_wdt_probe(struct + + ret = misc_register(&(wdev->retu_wdt_miscdev)); + if (ret) +- goto free3; ++ goto err_free_wdev; + + INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work); + +- /* passed as module parameter? */ +- ret = retu_modify_counter(counter_param); +- if (ret == -EINVAL) { +- ret = retu_modify_counter(RETU_WDT_DEFAULT_TIMER); +- dev_dbg(&pdev->dev, "Initializing to default value\n"); +- } +- +- /* Kick the watchdog for kernel booting to finish */ ++ /* Kick the watchdog for kernel booting to finish. ++ * If nowayout is not set, we start the ping work. */ ++#ifdef CONFIG_WATCHDOG_NOWAYOUT + retu_modify_counter(RETU_WDT_MAX_TIMER); +- +- ret = retu_wdt_ping(); +- if (ret < 0) { +- dev_err(&pdev->dev, "Failed to ping\n"); +- goto free4; +- } ++#else ++ retu_wdt_ping_enable(retu_wdt); ++#endif + + return 0; + +-free4: +- misc_deregister(&wdev->retu_wdt_miscdev); +- +-free3: +- device_remove_file(&pdev->dev, &dev_attr_counter); +- +-free2: +- device_remove_file(&pdev->dev, &dev_attr_period); +- +-free1: ++err_free_wdev: + kfree(wdev); + + return ret; +@@ -329,8 +235,6 @@ static int __devexit retu_wdt_remove(str + + wdev = platform_get_drvdata(pdev); + misc_deregister(&wdev->retu_wdt_miscdev); +- device_remove_file(&pdev->dev, &dev_attr_period); +- device_remove_file(&pdev->dev, &dev_attr_counter); + cancel_delayed_work_sync(&wdev->ping_work); + kfree(wdev); + +@@ -356,9 +260,7 @@ static void __exit retu_wdt_exit(void) + + module_init(retu_wdt_init); + module_exit(retu_wdt_exit); +-module_param(counter_param, int, 0); + + MODULE_DESCRIPTION("Retu WatchDog"); + MODULE_AUTHOR("Amit Kucheria"); + MODULE_LICENSE("GPL"); +- |