n810: More retu-wdt cleanups
SVN-Revision: 25863
This commit is contained in:
Michael Büsch
parent
5bddd70a37
commit
3a3c99f7ee
4 changed files with 389 additions and 181 deletions
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@ -0,0 +1,182 @@
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Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c
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===================================================================
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--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-04 15:45:37.533948567 +0100
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+++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-04 15:46:21.312816961 +0100
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@@ -52,7 +52,6 @@ static DEFINE_MUTEX(retu_wdt_mutex);
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/* Current period of watchdog */
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static unsigned int period_val = RETU_WDT_DEFAULT_TIMER;
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-static int counter_param = RETU_WDT_MAX_TIMER;
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struct retu_wdt_dev {
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struct device *dev;
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@@ -109,56 +108,6 @@ static void retu_wdt_ping_work(struct wo
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retu_wdt_ping_enable(wdev);
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}
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-static ssize_t retu_wdt_period_show(struct device *dev,
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- struct device_attribute *attr, char *buf)
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-{
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- /* Show current max counter */
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- return sprintf(buf, "%u\n", (u16)period_val);
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-}
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-
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-/*
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- * Note: This inteface is non-standard and likely to disappear!
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- * Use /dev/watchdog instead, that's the standard.
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- */
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-static ssize_t retu_wdt_period_store(struct device *dev,
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- struct device_attribute *attr,
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- const char *buf, size_t count)
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-{
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- unsigned int new_period;
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- int ret;
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-
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-#ifdef CONFIG_WATCHDOG_NOWAYOUT
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- retu_wdt_ping_disable(retu_wdt);
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-#endif
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-
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- if (sscanf(buf, "%u", &new_period) != 1) {
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- printk(KERN_ALERT "retu_wdt_period_store: Invalid input\n");
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- return -EINVAL;
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- }
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-
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- ret = retu_modify_counter(new_period);
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- if (ret < 0)
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- return ret;
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-
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- return strnlen(buf, count);
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-}
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-
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-static ssize_t retu_wdt_counter_show(struct device *dev,
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- struct device_attribute *attr, char *buf)
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-{
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- u16 counter;
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-
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- /* Show current value in watchdog counter */
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- counter = retu_read_reg(dev, RETU_REG_WATCHDOG);
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-
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- /* Only the 5 LSB are important */
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- return snprintf(buf, PAGE_SIZE, "%u\n", (counter & 0x3F));
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-}
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-
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-static DEVICE_ATTR(period, S_IRUGO | S_IWUSR, retu_wdt_period_show, \
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- retu_wdt_period_store);
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-static DEVICE_ATTR(counter, S_IRUGO, retu_wdt_counter_show, NULL);
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-
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static int retu_wdt_open(struct inode *inode, struct file *file)
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{
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if (test_and_set_bit(0, &retu_wdt->users))
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@@ -232,18 +181,6 @@ static long retu_wdt_ioctl(struct file *
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return 0;
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}
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-/* Start kicking retu watchdog until user space starts doing the kicking */
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-static int __devinit retu_wdt_ping(void)
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-{
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-#ifdef CONFIG_WATCHDOG_NOWAYOUT
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- retu_modify_counter(RETU_WDT_MAX_TIMER);
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-#else
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- retu_wdt_ping_enable(retu_wdt);
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-#endif
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-
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- return 0;
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-}
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-
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static const struct file_operations retu_wdt_fops = {
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.owner = THIS_MODULE,
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.write = retu_wdt_write,
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@@ -252,8 +189,6 @@ static const struct file_operations retu
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.release = retu_wdt_release,
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};
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-/*----------------------------------------------------------------------------*/
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-
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static int __init retu_wdt_probe(struct platform_device *pdev)
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{
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struct retu_wdt_dev *wdev;
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@@ -265,18 +200,6 @@ static int __init retu_wdt_probe(struct
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wdev->dev = &pdev->dev;
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- ret = device_create_file(&pdev->dev, &dev_attr_period);
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- if (ret) {
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- dev_err(&pdev->dev, "Error creating sysfs period\n");
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- goto free1;
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- }
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-
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- ret = device_create_file(&pdev->dev, &dev_attr_counter);
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- if (ret) {
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- dev_err(&pdev->dev, "Error creating sysfs counter\n");
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- goto free2;
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- }
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-
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platform_set_drvdata(pdev, wdev);
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retu_wdt = wdev;
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wdev->retu_wdt_miscdev.parent = &pdev->dev;
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@@ -286,38 +209,21 @@ static int __init retu_wdt_probe(struct
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ret = misc_register(&(wdev->retu_wdt_miscdev));
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if (ret)
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- goto free3;
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+ goto err_free_wdev;
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INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work);
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- /* passed as module parameter? */
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- ret = retu_modify_counter(counter_param);
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- if (ret == -EINVAL) {
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- ret = retu_modify_counter(RETU_WDT_DEFAULT_TIMER);
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- dev_dbg(&pdev->dev, "Initializing to default value\n");
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- }
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-
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- /* Kick the watchdog for kernel booting to finish */
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+ /* Kick the watchdog for kernel booting to finish.
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+ * If nowayout is not set, we start the ping work. */
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+#ifdef CONFIG_WATCHDOG_NOWAYOUT
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retu_modify_counter(RETU_WDT_MAX_TIMER);
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-
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- ret = retu_wdt_ping();
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- if (ret < 0) {
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- dev_err(&pdev->dev, "Failed to ping\n");
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- goto free4;
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- }
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+#else
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+ retu_wdt_ping_enable(retu_wdt);
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+#endif
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return 0;
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-free4:
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- misc_deregister(&wdev->retu_wdt_miscdev);
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-
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-free3:
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- device_remove_file(&pdev->dev, &dev_attr_counter);
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-
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-free2:
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- device_remove_file(&pdev->dev, &dev_attr_period);
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-
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-free1:
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+err_free_wdev:
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kfree(wdev);
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return ret;
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@@ -329,8 +235,6 @@ static int __devexit retu_wdt_remove(str
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wdev = platform_get_drvdata(pdev);
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misc_deregister(&wdev->retu_wdt_miscdev);
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- device_remove_file(&pdev->dev, &dev_attr_period);
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- device_remove_file(&pdev->dev, &dev_attr_counter);
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cancel_delayed_work_sync(&wdev->ping_work);
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kfree(wdev);
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@@ -356,9 +260,7 @@ static void __exit retu_wdt_exit(void)
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module_init(retu_wdt_init);
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module_exit(retu_wdt_exit);
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-module_param(counter_param, int, 0);
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MODULE_DESCRIPTION("Retu WatchDog");
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MODULE_AUTHOR("Amit Kucheria");
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MODULE_LICENSE("GPL");
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-
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@ -1,73 +1,8 @@
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Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c
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===================================================================
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--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-02 16:49:51.231863891 +0100
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+++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-02 16:53:47.189454637 +0100
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@@ -52,7 +52,6 @@ static DEFINE_MUTEX(retu_wdt_mutex);
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/* Current period of watchdog */
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static unsigned int period_val = RETU_WDT_DEFAULT_TIMER;
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-static int counter_param = RETU_WDT_MAX_TIMER;
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struct retu_wdt_dev {
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struct device *dev;
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@@ -109,56 +108,6 @@ static void retu_wdt_ping_work(struct wo
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retu_wdt_ping_enable(wdev);
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}
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-static ssize_t retu_wdt_period_show(struct device *dev,
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- struct device_attribute *attr, char *buf)
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-{
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- /* Show current max counter */
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- return sprintf(buf, "%u\n", (u16)period_val);
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-}
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-
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-/*
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- * Note: This inteface is non-standard and likely to disappear!
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- * Use /dev/watchdog instead, that's the standard.
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- */
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-static ssize_t retu_wdt_period_store(struct device *dev,
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- struct device_attribute *attr,
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- const char *buf, size_t count)
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-{
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- unsigned int new_period;
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- int ret;
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-
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-#ifdef CONFIG_WATCHDOG_NOWAYOUT
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- retu_wdt_ping_disable(retu_wdt);
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-#endif
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-
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- if (sscanf(buf, "%u", &new_period) != 1) {
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- printk(KERN_ALERT "retu_wdt_period_store: Invalid input\n");
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- return -EINVAL;
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- }
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-
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- ret = retu_modify_counter(new_period);
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- if (ret < 0)
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- return ret;
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-
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- return strnlen(buf, count);
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-}
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-
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-static ssize_t retu_wdt_counter_show(struct device *dev,
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- struct device_attribute *attr, char *buf)
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-{
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- u16 counter;
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-
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- /* Show current value in watchdog counter */
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- counter = retu_read_reg(dev, RETU_REG_WATCHDOG);
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-
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- /* Only the 5 LSB are important */
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- return snprintf(buf, PAGE_SIZE, "%u\n", (counter & 0x3F));
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-}
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-
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-static DEVICE_ATTR(period, S_IRUGO | S_IWUSR, retu_wdt_period_show, \
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- retu_wdt_period_store);
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-static DEVICE_ATTR(counter, S_IRUGO, retu_wdt_counter_show, NULL);
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-
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static int retu_wdt_open(struct inode *inode, struct file *file)
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{
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if (test_and_set_bit(0, &retu_wdt->users))
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@@ -175,9 +124,9 @@ static int retu_wdt_release(struct inode
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--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-04 15:46:21.312816961 +0100
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+++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-04 15:46:54.658384947 +0100
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@@ -124,9 +124,9 @@ static int retu_wdt_release(struct inode
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struct retu_wdt_dev *wdev = file->private_data;
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#ifndef CONFIG_WATCHDOG_NOWAYOUT
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@ -79,116 +14,3 @@ Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c
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return 0;
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}
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@@ -232,18 +181,6 @@ static long retu_wdt_ioctl(struct file *
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return 0;
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}
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-/* Start kicking retu watchdog until user space starts doing the kicking */
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-static int __devinit retu_wdt_ping(void)
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-{
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-#ifdef CONFIG_WATCHDOG_NOWAYOUT
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- retu_modify_counter(RETU_WDT_MAX_TIMER);
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-#else
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- retu_wdt_ping_enable(retu_wdt);
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-#endif
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-
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- return 0;
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-}
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-
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static const struct file_operations retu_wdt_fops = {
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.owner = THIS_MODULE,
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.write = retu_wdt_write,
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@@ -252,8 +189,6 @@ static const struct file_operations retu
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.release = retu_wdt_release,
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};
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-/*----------------------------------------------------------------------------*/
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-
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static int __init retu_wdt_probe(struct platform_device *pdev)
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{
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struct retu_wdt_dev *wdev;
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@@ -265,18 +200,6 @@ static int __init retu_wdt_probe(struct
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wdev->dev = &pdev->dev;
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- ret = device_create_file(&pdev->dev, &dev_attr_period);
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- if (ret) {
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- dev_err(&pdev->dev, "Error creating sysfs period\n");
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- goto free1;
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- }
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-
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- ret = device_create_file(&pdev->dev, &dev_attr_counter);
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- if (ret) {
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- dev_err(&pdev->dev, "Error creating sysfs counter\n");
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- goto free2;
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- }
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-
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platform_set_drvdata(pdev, wdev);
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retu_wdt = wdev;
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wdev->retu_wdt_miscdev.parent = &pdev->dev;
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@@ -286,38 +209,21 @@ static int __init retu_wdt_probe(struct
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ret = misc_register(&(wdev->retu_wdt_miscdev));
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if (ret)
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- goto free3;
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+ goto err_free_wdev;
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INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work);
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- /* passed as module parameter? */
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- ret = retu_modify_counter(counter_param);
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- if (ret == -EINVAL) {
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- ret = retu_modify_counter(RETU_WDT_DEFAULT_TIMER);
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- dev_dbg(&pdev->dev, "Initializing to default value\n");
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- }
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-
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- /* Kick the watchdog for kernel booting to finish */
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+ /* Kick the watchdog for kernel booting to finish.
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+ * If nowayout is not set, we start the ping work. */
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+#ifdef CONFIG_WATCHDOG_NOWAYOUT
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retu_modify_counter(RETU_WDT_MAX_TIMER);
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-
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- ret = retu_wdt_ping();
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- if (ret < 0) {
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- dev_err(&pdev->dev, "Failed to ping\n");
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- goto free4;
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- }
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+#else
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+ retu_wdt_ping_enable(retu_wdt);
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+#endif
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return 0;
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-free4:
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- misc_deregister(&wdev->retu_wdt_miscdev);
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-
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-free3:
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- device_remove_file(&pdev->dev, &dev_attr_counter);
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-
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-free2:
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- device_remove_file(&pdev->dev, &dev_attr_period);
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-
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-free1:
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+err_free_wdev:
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kfree(wdev);
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return ret;
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@@ -329,8 +235,6 @@ static int __devexit retu_wdt_remove(str
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wdev = platform_get_drvdata(pdev);
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misc_deregister(&wdev->retu_wdt_miscdev);
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- device_remove_file(&pdev->dev, &dev_attr_period);
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- device_remove_file(&pdev->dev, &dev_attr_counter);
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cancel_delayed_work_sync(&wdev->ping_work);
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kfree(wdev);
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@@ -356,9 +260,7 @@ static void __exit retu_wdt_exit(void)
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module_init(retu_wdt_init);
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module_exit(retu_wdt_exit);
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-module_param(counter_param, int, 0);
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MODULE_DESCRIPTION("Retu WatchDog");
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MODULE_AUTHOR("Amit Kucheria");
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MODULE_LICENSE("GPL");
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-
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@ -0,0 +1,191 @@
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Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c
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===================================================================
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--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-04 16:22:03.524019824 +0100
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+++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-04 16:22:31.186357952 +0100
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@@ -7,6 +7,8 @@
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*
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* Written by Amit Kucheria <amit.kucheria@nokia.com>
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*
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+ * Cleanups by Michael Buesch <mb@bu3sch.de> (C) 2011
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+ *
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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@@ -48,37 +50,31 @@
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#define RETU_WDT_DEFAULT_TIMER 32
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#define RETU_WDT_MAX_TIMER 63
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-static DEFINE_MUTEX(retu_wdt_mutex);
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-
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-/* Current period of watchdog */
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-static unsigned int period_val = RETU_WDT_DEFAULT_TIMER;
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-
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struct retu_wdt_dev {
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struct device *dev;
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+ unsigned int period_val; /* Current period of watchdog */
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unsigned long users;
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- struct miscdevice retu_wdt_miscdev;
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+ struct miscdevice miscdev;
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struct delayed_work ping_work;
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+ struct mutex mutex;
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};
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-static struct retu_wdt_dev *retu_wdt;
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-static int _retu_modify_counter(unsigned int new)
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+static inline void _retu_modify_counter(struct retu_wdt_dev *wdev,
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+ unsigned int new)
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{
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- if (retu_wdt)
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- retu_write_reg(retu_wdt->dev, RETU_REG_WATCHDOG, (u16)new);
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-
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- return 0;
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+ retu_write_reg(wdev->dev, RETU_REG_WATCHDOG, (u16)new);
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}
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-static int retu_modify_counter(unsigned int new)
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+static int retu_modify_counter(struct retu_wdt_dev *wdev, unsigned int new)
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{
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if (new < RETU_WDT_MIN_TIMER || new > RETU_WDT_MAX_TIMER)
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return -EINVAL;
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- mutex_lock(&retu_wdt_mutex);
|
||||
- period_val = new;
|
||||
- _retu_modify_counter(period_val);
|
||||
- mutex_unlock(&retu_wdt_mutex);
|
||||
+ mutex_lock(&wdev->mutex);
|
||||
+ wdev->period_val = new;
|
||||
+ _retu_modify_counter(wdev, wdev->period_val);
|
||||
+ mutex_unlock(&wdev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@@ -90,14 +86,14 @@ static int retu_modify_counter(unsigned
|
||||
*/
|
||||
static void retu_wdt_ping_enable(struct retu_wdt_dev *wdev)
|
||||
{
|
||||
- _retu_modify_counter(RETU_WDT_MAX_TIMER);
|
||||
+ _retu_modify_counter(wdev, 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);
|
||||
+ _retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
|
||||
cancel_delayed_work_sync(&wdev->ping_work);
|
||||
}
|
||||
|
||||
@@ -110,18 +106,21 @@ static void retu_wdt_ping_work(struct wo
|
||||
|
||||
static int retu_wdt_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
- if (test_and_set_bit(0, &retu_wdt->users))
|
||||
+ struct miscdevice *mdev = file->private_data;
|
||||
+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
|
||||
+
|
||||
+ if (test_and_set_bit(0, &wdev->users))
|
||||
return -EBUSY;
|
||||
|
||||
- file->private_data = (void *)retu_wdt;
|
||||
- retu_wdt_ping_disable(retu_wdt);
|
||||
+ retu_wdt_ping_disable(wdev);
|
||||
|
||||
return nonseekable_open(inode, file);
|
||||
}
|
||||
|
||||
static int retu_wdt_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
- struct retu_wdt_dev *wdev = file->private_data;
|
||||
+ struct miscdevice *mdev = file->private_data;
|
||||
+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
|
||||
|
||||
#ifndef CONFIG_WATCHDOG_NOWAYOUT
|
||||
retu_wdt_ping_enable(wdev);
|
||||
@@ -134,8 +133,11 @@ static int retu_wdt_release(struct inode
|
||||
static ssize_t retu_wdt_write(struct file *file, const char __user *data,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
+ struct miscdevice *mdev = file->private_data;
|
||||
+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
|
||||
+
|
||||
if (len)
|
||||
- retu_modify_counter(RETU_WDT_MAX_TIMER);
|
||||
+ retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
|
||||
|
||||
return len;
|
||||
}
|
||||
@@ -143,6 +145,8 @@ static ssize_t retu_wdt_write(struct fil
|
||||
static long retu_wdt_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
+ struct miscdevice *mdev = file->private_data;
|
||||
+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
|
||||
int new_margin;
|
||||
|
||||
static struct watchdog_info ident = {
|
||||
@@ -167,15 +171,15 @@ static long retu_wdt_ioctl(struct file *
|
||||
return put_user(omap_prcm_get_reset_sources(),
|
||||
(int __user *)arg);
|
||||
case WDIOC_KEEPALIVE:
|
||||
- retu_modify_counter(RETU_WDT_MAX_TIMER);
|
||||
+ retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
|
||||
break;
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(new_margin, (int __user *)arg))
|
||||
return -EFAULT;
|
||||
- retu_modify_counter(new_margin);
|
||||
+ retu_modify_counter(wdev, new_margin);
|
||||
/* Fall through */
|
||||
case WDIOC_GETTIMEOUT:
|
||||
- return put_user(period_val, (int __user *)arg);
|
||||
+ return put_user(wdev->period_val, (int __user *)arg);
|
||||
}
|
||||
|
||||
return 0;
|
||||
@@ -199,15 +203,17 @@ static int __init retu_wdt_probe(struct
|
||||
return -ENOMEM;
|
||||
|
||||
wdev->dev = &pdev->dev;
|
||||
+ wdev->period_val = RETU_WDT_DEFAULT_TIMER;
|
||||
+ mutex_init(&wdev->mutex);
|
||||
|
||||
platform_set_drvdata(pdev, wdev);
|
||||
- retu_wdt = wdev;
|
||||
- wdev->retu_wdt_miscdev.parent = &pdev->dev;
|
||||
- wdev->retu_wdt_miscdev.minor = WATCHDOG_MINOR;
|
||||
- wdev->retu_wdt_miscdev.name = "watchdog";
|
||||
- wdev->retu_wdt_miscdev.fops = &retu_wdt_fops;
|
||||
|
||||
- ret = misc_register(&(wdev->retu_wdt_miscdev));
|
||||
+ wdev->miscdev.parent = &pdev->dev;
|
||||
+ wdev->miscdev.minor = WATCHDOG_MINOR;
|
||||
+ wdev->miscdev.name = "watchdog";
|
||||
+ wdev->miscdev.fops = &retu_wdt_fops;
|
||||
+
|
||||
+ ret = misc_register(&wdev->miscdev);
|
||||
if (ret)
|
||||
goto err_free_wdev;
|
||||
|
||||
@@ -216,9 +222,9 @@ static int __init retu_wdt_probe(struct
|
||||
/* 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);
|
||||
+ retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
|
||||
#else
|
||||
- retu_wdt_ping_enable(retu_wdt);
|
||||
+ retu_wdt_ping_enable(wdev);
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
@@ -234,7 +240,7 @@ static int __devexit retu_wdt_remove(str
|
||||
struct retu_wdt_dev *wdev;
|
||||
|
||||
wdev = platform_get_drvdata(pdev);
|
||||
- misc_deregister(&wdev->retu_wdt_miscdev);
|
||||
+ misc_deregister(&wdev->miscdev);
|
||||
cancel_delayed_work_sync(&wdev->ping_work);
|
||||
kfree(wdev);
|
||||
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
Index: linux-2.6.38-rc6/drivers/cbus/retu-wdt.c
|
||||
===================================================================
|
||||
--- linux-2.6.38-rc6.orig/drivers/cbus/retu-wdt.c 2011-03-04 16:21:39.106113985 +0100
|
||||
+++ linux-2.6.38-rc6/drivers/cbus/retu-wdt.c 2011-03-04 16:21:48.503540758 +0100
|
||||
@@ -149,7 +149,7 @@ static long retu_wdt_ioctl(struct file *
|
||||
struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
|
||||
int new_margin;
|
||||
|
||||
- static struct watchdog_info ident = {
|
||||
+ static const struct watchdog_info ident = {
|
||||
.identity = "Retu Watchdog",
|
||||
.options = WDIOF_SETTIMEOUT,
|
||||
.firmware_version = 0,
|
||||
Loading…
Reference in a new issue