[WATCHDOG] omap_wdt.c: cleanup a bit omap_wdt.c
Trivial cleanup patch. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
parent
9f69e3b0c2
commit
b3112180fe
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@ -70,11 +70,14 @@ struct omap_wdt_dev {
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static void omap_wdt_ping(struct omap_wdt_dev *wdev)
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static void omap_wdt_ping(struct omap_wdt_dev *wdev)
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{
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{
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void __iomem *base = wdev->base;
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void __iomem *base = wdev->base;
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/* wait for posted write to complete */
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/* wait for posted write to complete */
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x08)
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x08)
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cpu_relax();
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cpu_relax();
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wdt_trgr_pattern = ~wdt_trgr_pattern;
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wdt_trgr_pattern = ~wdt_trgr_pattern;
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__raw_writel(wdt_trgr_pattern, (base + OMAP_WATCHDOG_TGR));
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__raw_writel(wdt_trgr_pattern, (base + OMAP_WATCHDOG_TGR));
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/* wait for posted write to complete */
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/* wait for posted write to complete */
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x08)
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x08)
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cpu_relax();
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cpu_relax();
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@ -83,12 +86,13 @@ static void omap_wdt_ping(struct omap_wdt_dev *wdev)
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static void omap_wdt_enable(struct omap_wdt_dev *wdev)
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static void omap_wdt_enable(struct omap_wdt_dev *wdev)
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{
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{
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void __iomem *base;
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void __iomem *base = wdev->base;
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base = wdev->base;
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/* Sequence to enable the watchdog */
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/* Sequence to enable the watchdog */
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__raw_writel(0xBBBB, base + OMAP_WATCHDOG_SPR);
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__raw_writel(0xBBBB, base + OMAP_WATCHDOG_SPR);
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x10)
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x10)
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cpu_relax();
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cpu_relax();
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__raw_writel(0x4444, base + OMAP_WATCHDOG_SPR);
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__raw_writel(0x4444, base + OMAP_WATCHDOG_SPR);
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x10)
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while ((__raw_readl(base + OMAP_WATCHDOG_WPS)) & 0x10)
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cpu_relax();
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cpu_relax();
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@ -96,12 +100,13 @@ static void omap_wdt_enable(struct omap_wdt_dev *wdev)
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static void omap_wdt_disable(struct omap_wdt_dev *wdev)
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static void omap_wdt_disable(struct omap_wdt_dev *wdev)
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{
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{
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void __iomem *base;
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void __iomem *base = wdev->base;
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base = wdev->base;
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/* sequence required to disable watchdog */
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/* sequence required to disable watchdog */
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__raw_writel(0xAAAA, base + OMAP_WATCHDOG_SPR); /* TIMER_MODE */
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__raw_writel(0xAAAA, base + OMAP_WATCHDOG_SPR); /* TIMER_MODE */
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x10)
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x10)
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cpu_relax();
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cpu_relax();
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__raw_writel(0x5555, base + OMAP_WATCHDOG_SPR); /* TIMER_MODE */
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__raw_writel(0x5555, base + OMAP_WATCHDOG_SPR); /* TIMER_MODE */
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x10)
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x10)
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cpu_relax();
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cpu_relax();
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@ -119,12 +124,12 @@ static void omap_wdt_adjust_timeout(unsigned new_timeout)
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static void omap_wdt_set_timeout(struct omap_wdt_dev *wdev)
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static void omap_wdt_set_timeout(struct omap_wdt_dev *wdev)
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{
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{
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u32 pre_margin = GET_WLDR_VAL(timer_margin);
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u32 pre_margin = GET_WLDR_VAL(timer_margin);
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void __iomem *base;
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void __iomem *base = wdev->base;
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base = wdev->base;
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/* just count up at 32 KHz */
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/* just count up at 32 KHz */
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x04)
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x04)
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cpu_relax();
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cpu_relax();
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__raw_writel(pre_margin, base + OMAP_WATCHDOG_LDR);
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__raw_writel(pre_margin, base + OMAP_WATCHDOG_LDR);
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x04)
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x04)
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cpu_relax();
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cpu_relax();
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@ -133,13 +138,11 @@ static void omap_wdt_set_timeout(struct omap_wdt_dev *wdev)
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/*
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/*
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* Allow only one task to hold it open
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* Allow only one task to hold it open
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*/
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*/
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static int omap_wdt_open(struct inode *inode, struct file *file)
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static int omap_wdt_open(struct inode *inode, struct file *file)
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{
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{
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struct omap_wdt_dev *wdev;
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struct omap_wdt_dev *wdev = platform_get_drvdata(omap_wdt_dev);
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void __iomem *base;
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void __iomem *base = wdev->base;
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wdev = platform_get_drvdata(omap_wdt_dev);
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base = wdev->base;
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if (test_and_set_bit(1, (unsigned long *)&(wdev->omap_wdt_users)))
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if (test_and_set_bit(1, (unsigned long *)&(wdev->omap_wdt_users)))
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return -EBUSY;
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return -EBUSY;
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@ -154,6 +157,7 @@ static int omap_wdt_open(struct inode *inode, struct file *file)
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/* initialize prescaler */
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/* initialize prescaler */
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
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cpu_relax();
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cpu_relax();
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__raw_writel((1 << 5) | (PTV << 2), base + OMAP_WATCHDOG_CNTRL);
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__raw_writel((1 << 5) | (PTV << 2), base + OMAP_WATCHDOG_CNTRL);
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
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while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
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cpu_relax();
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cpu_relax();
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@ -162,13 +166,14 @@ static int omap_wdt_open(struct inode *inode, struct file *file)
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omap_wdt_set_timeout(wdev);
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omap_wdt_set_timeout(wdev);
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omap_wdt_enable(wdev);
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omap_wdt_enable(wdev);
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return nonseekable_open(inode, file);
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return nonseekable_open(inode, file);
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}
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}
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static int omap_wdt_release(struct inode *inode, struct file *file)
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static int omap_wdt_release(struct inode *inode, struct file *file)
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{
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{
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struct omap_wdt_dev *wdev;
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struct omap_wdt_dev *wdev = file->private_data;
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wdev = file->private_data;
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/*
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/*
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* Shut off the timer unless NOWAYOUT is defined.
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* Shut off the timer unless NOWAYOUT is defined.
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*/
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*/
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@ -187,14 +192,15 @@ static int omap_wdt_release(struct inode *inode, struct file *file)
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printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
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printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
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#endif
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#endif
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wdev->omap_wdt_users = 0;
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wdev->omap_wdt_users = 0;
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return 0;
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return 0;
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}
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}
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static ssize_t omap_wdt_write(struct file *file, const char __user *data,
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static ssize_t omap_wdt_write(struct file *file, const char __user *data,
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size_t len, loff_t *ppos)
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size_t len, loff_t *ppos)
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{
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{
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struct omap_wdt_dev *wdev;
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struct omap_wdt_dev *wdev = file->private_data;
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wdev = file->private_data;
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/* Refresh LOAD_TIME. */
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/* Refresh LOAD_TIME. */
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if (len) {
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if (len) {
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spin_lock(&wdt_lock);
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spin_lock(&wdt_lock);
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@ -214,6 +220,7 @@ static long omap_wdt_ioctl(struct file *file, unsigned int cmd,
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.options = WDIOF_SETTIMEOUT,
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.options = WDIOF_SETTIMEOUT,
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.firmware_version = 0,
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.firmware_version = 0,
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};
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};
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wdev = file->private_data;
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wdev = file->private_data;
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switch (cmd) {
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switch (cmd) {
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@ -262,31 +269,37 @@ static const struct file_operations omap_wdt_fops = {
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.release = omap_wdt_release,
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.release = omap_wdt_release,
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};
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};
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static int __init omap_wdt_probe(struct platform_device *pdev)
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static int __init omap_wdt_probe(struct platform_device *pdev)
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{
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{
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struct resource *res, *mem;
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struct resource *res, *mem;
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int ret;
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struct omap_wdt_dev *wdev;
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struct omap_wdt_dev *wdev;
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int ret;
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/* reserve static register mappings */
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/* reserve static register mappings */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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if (!res) {
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return -ENOENT;
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ret = -ENOENT;
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goto err_get_resource;
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}
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if (omap_wdt_dev)
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if (omap_wdt_dev) {
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return -EBUSY;
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ret = -EBUSY;
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goto err_busy;
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}
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mem = request_mem_region(res->start, res->end - res->start + 1,
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mem = request_mem_region(res->start, res->end - res->start + 1,
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pdev->name);
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pdev->name);
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if (mem == NULL)
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if (!mem) {
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return -EBUSY;
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ret = -EBUSY;
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goto err_busy;
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}
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wdev = kzalloc(sizeof(struct omap_wdt_dev), GFP_KERNEL);
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wdev = kzalloc(sizeof(struct omap_wdt_dev), GFP_KERNEL);
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if (!wdev) {
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if (!wdev) {
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ret = -ENOMEM;
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ret = -ENOMEM;
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goto fail;
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goto err_kzalloc;
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}
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}
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wdev->omap_wdt_users = 0;
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wdev->omap_wdt_users = 0;
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wdev->mem = mem;
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wdev->mem = mem;
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@ -295,7 +308,7 @@ static int __init omap_wdt_probe(struct platform_device *pdev)
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if (IS_ERR(wdev->armwdt_ck)) {
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if (IS_ERR(wdev->armwdt_ck)) {
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ret = PTR_ERR(wdev->armwdt_ck);
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ret = PTR_ERR(wdev->armwdt_ck);
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wdev->armwdt_ck = NULL;
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wdev->armwdt_ck = NULL;
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goto fail;
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goto err_clk;
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}
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}
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}
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}
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@ -304,13 +317,13 @@ static int __init omap_wdt_probe(struct platform_device *pdev)
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if (IS_ERR(wdev->mpu_wdt_ick)) {
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if (IS_ERR(wdev->mpu_wdt_ick)) {
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ret = PTR_ERR(wdev->mpu_wdt_ick);
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ret = PTR_ERR(wdev->mpu_wdt_ick);
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wdev->mpu_wdt_ick = NULL;
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wdev->mpu_wdt_ick = NULL;
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goto fail;
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goto err_clk;
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}
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}
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wdev->mpu_wdt_fck = clk_get(&pdev->dev, "mpu_wdt_fck");
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wdev->mpu_wdt_fck = clk_get(&pdev->dev, "mpu_wdt_fck");
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if (IS_ERR(wdev->mpu_wdt_fck)) {
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if (IS_ERR(wdev->mpu_wdt_fck)) {
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ret = PTR_ERR(wdev->mpu_wdt_fck);
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ret = PTR_ERR(wdev->mpu_wdt_fck);
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wdev->mpu_wdt_fck = NULL;
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wdev->mpu_wdt_fck = NULL;
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goto fail;
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goto err_clk;
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}
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}
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}
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}
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@ -319,19 +332,19 @@ static int __init omap_wdt_probe(struct platform_device *pdev)
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if (IS_ERR(wdev->mpu_wdt_ick)) {
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if (IS_ERR(wdev->mpu_wdt_ick)) {
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ret = PTR_ERR(wdev->mpu_wdt_ick);
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ret = PTR_ERR(wdev->mpu_wdt_ick);
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wdev->mpu_wdt_ick = NULL;
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wdev->mpu_wdt_ick = NULL;
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goto fail;
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goto err_clk;
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}
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}
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wdev->mpu_wdt_fck = clk_get(&pdev->dev, "wdt2_fck");
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wdev->mpu_wdt_fck = clk_get(&pdev->dev, "wdt2_fck");
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if (IS_ERR(wdev->mpu_wdt_fck)) {
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if (IS_ERR(wdev->mpu_wdt_fck)) {
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ret = PTR_ERR(wdev->mpu_wdt_fck);
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ret = PTR_ERR(wdev->mpu_wdt_fck);
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wdev->mpu_wdt_fck = NULL;
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wdev->mpu_wdt_fck = NULL;
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goto fail;
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goto err_clk;
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}
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}
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}
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}
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wdev->base = ioremap(res->start, res->end - res->start + 1);
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wdev->base = ioremap(res->start, res->end - res->start + 1);
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if (!wdev->base) {
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if (!wdev->base) {
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ret = -ENOMEM;
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ret = -ENOMEM;
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goto fail;
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goto err_ioremap;
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}
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}
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platform_set_drvdata(pdev, wdev);
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platform_set_drvdata(pdev, wdev);
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@ -346,7 +359,7 @@ static int __init omap_wdt_probe(struct platform_device *pdev)
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ret = misc_register(&(wdev->omap_wdt_miscdev));
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ret = misc_register(&(wdev->omap_wdt_miscdev));
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if (ret)
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if (ret)
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goto fail;
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goto err_misc;
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pr_info("OMAP Watchdog Timer Rev 0x%02x: initial timeout %d sec\n",
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pr_info("OMAP Watchdog Timer Rev 0x%02x: initial timeout %d sec\n",
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__raw_readl(wdev->base + OMAP_WATCHDOG_REV) & 0xFF,
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__raw_readl(wdev->base + OMAP_WATCHDOG_REV) & 0xFF,
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@ -359,28 +372,34 @@ static int __init omap_wdt_probe(struct platform_device *pdev)
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return 0;
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return 0;
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fail:
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err_misc:
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if (wdev) {
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platform_set_drvdata(pdev, NULL);
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platform_set_drvdata(pdev, NULL);
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iounmap(wdev->base);
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if (wdev->armwdt_ck)
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clk_put(wdev->armwdt_ck);
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err_ioremap:
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if (wdev->mpu_wdt_ick)
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wdev->base = NULL;
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clk_put(wdev->mpu_wdt_ick);
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if (wdev->mpu_wdt_fck)
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err_clk:
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clk_put(wdev->mpu_wdt_fck);
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if (wdev->armwdt_ck)
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iounmap(wdev->base);
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clk_put(wdev->armwdt_ck);
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kfree(wdev);
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if (wdev->mpu_wdt_ick)
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}
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clk_put(wdev->mpu_wdt_ick);
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if (mem) {
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if (wdev->mpu_wdt_fck)
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release_mem_region(res->start, res->end - res->start + 1);
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clk_put(wdev->mpu_wdt_fck);
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}
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kfree(wdev);
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err_kzalloc:
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release_mem_region(res->start, res->end - res->start + 1);
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err_busy:
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err_get_resource:
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return ret;
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return ret;
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}
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}
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static void omap_wdt_shutdown(struct platform_device *pdev)
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static void omap_wdt_shutdown(struct platform_device *pdev)
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{
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{
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struct omap_wdt_dev *wdev;
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struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);
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wdev = platform_get_drvdata(pdev);
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if (wdev->omap_wdt_users)
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if (wdev->omap_wdt_users)
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omap_wdt_disable(wdev);
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omap_wdt_disable(wdev);
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@ -388,8 +407,7 @@ static void omap_wdt_shutdown(struct platform_device *pdev)
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static int omap_wdt_remove(struct platform_device *pdev)
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static int omap_wdt_remove(struct platform_device *pdev)
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{
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{
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struct omap_wdt_dev *wdev;
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struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);
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wdev = platform_get_drvdata(pdev);
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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if (!res)
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||||||
|
@ -398,14 +416,17 @@ static int omap_wdt_remove(struct platform_device *pdev)
|
||||||
misc_deregister(&(wdev->omap_wdt_miscdev));
|
misc_deregister(&(wdev->omap_wdt_miscdev));
|
||||||
release_mem_region(res->start, res->end - res->start + 1);
|
release_mem_region(res->start, res->end - res->start + 1);
|
||||||
platform_set_drvdata(pdev, NULL);
|
platform_set_drvdata(pdev, NULL);
|
||||||
|
|
||||||
if (wdev->armwdt_ck) {
|
if (wdev->armwdt_ck) {
|
||||||
clk_put(wdev->armwdt_ck);
|
clk_put(wdev->armwdt_ck);
|
||||||
wdev->armwdt_ck = NULL;
|
wdev->armwdt_ck = NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (wdev->mpu_wdt_ick) {
|
if (wdev->mpu_wdt_ick) {
|
||||||
clk_put(wdev->mpu_wdt_ick);
|
clk_put(wdev->mpu_wdt_ick);
|
||||||
wdev->mpu_wdt_ick = NULL;
|
wdev->mpu_wdt_ick = NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (wdev->mpu_wdt_fck) {
|
if (wdev->mpu_wdt_fck) {
|
||||||
clk_put(wdev->mpu_wdt_fck);
|
clk_put(wdev->mpu_wdt_fck);
|
||||||
wdev->mpu_wdt_fck = NULL;
|
wdev->mpu_wdt_fck = NULL;
|
||||||
|
@ -414,6 +435,7 @@ static int omap_wdt_remove(struct platform_device *pdev)
|
||||||
|
|
||||||
kfree(wdev);
|
kfree(wdev);
|
||||||
omap_wdt_dev = NULL;
|
omap_wdt_dev = NULL;
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -427,21 +449,23 @@ static int omap_wdt_remove(struct platform_device *pdev)
|
||||||
|
|
||||||
static int omap_wdt_suspend(struct platform_device *pdev, pm_message_t state)
|
static int omap_wdt_suspend(struct platform_device *pdev, pm_message_t state)
|
||||||
{
|
{
|
||||||
struct omap_wdt_dev *wdev;
|
struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);
|
||||||
wdev = platform_get_drvdata(pdev);
|
|
||||||
if (wdev->omap_wdt_users)
|
if (wdev->omap_wdt_users)
|
||||||
omap_wdt_disable(wdev);
|
omap_wdt_disable(wdev);
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int omap_wdt_resume(struct platform_device *pdev)
|
static int omap_wdt_resume(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
struct omap_wdt_dev *wdev;
|
struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);
|
||||||
wdev = platform_get_drvdata(pdev);
|
|
||||||
if (wdev->omap_wdt_users) {
|
if (wdev->omap_wdt_users) {
|
||||||
omap_wdt_enable(wdev);
|
omap_wdt_enable(wdev);
|
||||||
omap_wdt_ping(wdev);
|
omap_wdt_ping(wdev);
|
||||||
}
|
}
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue