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author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-25 22:10:38 +0000 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-25 22:10:38 +0000 |
commit | 9f33be2c3a80bdc2cc08342dd77fac87652e0548 (patch) | |
tree | 7ad6e825427a15c5ec0fc15540abc0429d7f4bce /drivers/watchdog | |
parent | 2741ecb4ce5c2d430b5c44b0a169038338c21df5 (diff) | |
parent | eed18b5fa4d297c681b00144e8c6942dd35d39a7 (diff) | |
download | op-kernel-dev-9f33be2c3a80bdc2cc08342dd77fac87652e0548.zip op-kernel-dev-9f33be2c3a80bdc2cc08342dd77fac87652e0548.tar.gz |
Merge branches 'clks' and 'pnx' into devel
Diffstat (limited to 'drivers/watchdog')
-rw-r--r-- | drivers/watchdog/pnx4008_wdt.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c index 430a584..c7a9479 100644 --- a/drivers/watchdog/pnx4008_wdt.c +++ b/drivers/watchdog/pnx4008_wdt.c @@ -96,9 +96,6 @@ static void wdt_enable(void) { spin_lock(&io_lock); - if (wdt_clk) - clk_set_rate(wdt_clk, 1); - /* stop counter, initiate counter reset */ __raw_writel(RESET_COUNT, WDTIM_CTRL(wdt_base)); /*wait for reset to complete. 100% guarantee event */ @@ -125,19 +122,25 @@ static void wdt_disable(void) spin_lock(&io_lock); __raw_writel(0, WDTIM_CTRL(wdt_base)); /*stop counter */ - if (wdt_clk) - clk_set_rate(wdt_clk, 0); spin_unlock(&io_lock); } static int pnx4008_wdt_open(struct inode *inode, struct file *file) { + int ret; + if (test_and_set_bit(WDT_IN_USE, &wdt_status)) return -EBUSY; clear_bit(WDT_OK_TO_CLOSE, &wdt_status); + ret = clk_enable(wdt_clk); + if (ret) { + clear_bit(WDT_IN_USE, &wdt_status); + return ret; + } + wdt_enable(); return nonseekable_open(inode, file); @@ -225,6 +228,7 @@ static int pnx4008_wdt_release(struct inode *inode, struct file *file) printk(KERN_WARNING "WATCHDOG: Device closed unexpectdly\n"); wdt_disable(); + clk_disable(wdt_clk); clear_bit(WDT_IN_USE, &wdt_status); clear_bit(WDT_OK_TO_CLOSE, &wdt_status); @@ -273,25 +277,33 @@ static int __devinit pnx4008_wdt_probe(struct platform_device *pdev) } wdt_base = (void __iomem *)IO_ADDRESS(res->start); - wdt_clk = clk_get(&pdev->dev, "wdt_ck"); + wdt_clk = clk_get(&pdev->dev, NULL); if (IS_ERR(wdt_clk)) { ret = PTR_ERR(wdt_clk); release_resource(wdt_mem); kfree(wdt_mem); goto out; - } else - clk_set_rate(wdt_clk, 1); + } + + ret = clk_enable(wdt_clk); + if (ret) { + release_resource(wdt_mem); + kfree(wdt_mem); + goto out; + } ret = misc_register(&pnx4008_wdt_miscdev); if (ret < 0) { printk(KERN_ERR MODULE_NAME "cannot register misc device\n"); release_resource(wdt_mem); kfree(wdt_mem); - clk_set_rate(wdt_clk, 0); + clk_disable(wdt_clk); + clk_put(wdt_clk); } else { boot_status = (__raw_readl(WDTIM_RES(wdt_base)) & WDOG_RESET) ? WDIOF_CARDRESET : 0; wdt_disable(); /*disable for now */ + clk_disable(wdt_clk); set_bit(WDT_DEVICE_INITED, &wdt_status); } @@ -302,11 +314,10 @@ out: static int __devexit pnx4008_wdt_remove(struct platform_device *pdev) { misc_deregister(&pnx4008_wdt_miscdev); - if (wdt_clk) { - clk_set_rate(wdt_clk, 0); - clk_put(wdt_clk); - wdt_clk = NULL; - } + + clk_disable(wdt_clk); + clk_put(wdt_clk); + if (wdt_mem) { release_resource(wdt_mem); kfree(wdt_mem); |