OMAP: WDT: Use PM runtime APIs instead of clk FW APIs

Call runtime pm APIs pm_runtime_put_sync() and pm_runtime_get_sync()
for enabling/disabling the clocks, sysconfig settings instead of using
clock FW APIs.

Signed-off-by: Charulatha V <charu@ti.com>
Acked-by: Cousson, Benoit <b-cousson@ti.com>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c
index 76b58ab..dbbc580 100644 (file)
--- a/drivers/watchdog/omap_wdt.c
+++ b/drivers/watchdog/omap_wdt.c
@@ -38,11 +38,11 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/moduleparam.h>
-#include <linux/clk.h>
 #include <linux/bitops.h>
 #include <linux/io.h>
 #include <linux/uaccess.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
 #include <mach/hardware.h>
 #include <plat/prcm.h>
 
@@ -61,8 +61,6 @@ struct omap_wdt_dev {
        void __iomem    *base;          /* physical */
        struct device   *dev;
        int             omap_wdt_users;
-       struct clk      *ick;
-       struct clk      *fck;
        struct resource *mem;
        struct miscdevice omap_wdt_miscdev;
 };
@@ -146,8 +144,7 @@ static int omap_wdt_open(struct inode *inode, struct file *file)
        if (test_and_set_bit(1, (unsigned long *)&(wdev->omap_wdt_users)))
                return -EBUSY;
 
-       clk_enable(wdev->ick);    /* Enable the interface clock */
-       clk_enable(wdev->fck);    /* Enable the functional clock */
+       pm_runtime_get_sync(wdev->dev);
 
        /* initialize prescaler */
        while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
@@ -177,8 +174,7 @@ static int omap_wdt_release(struct inode *inode, struct file *file)
 
        omap_wdt_disable(wdev);
 
-       clk_disable(wdev->ick);
-       clk_disable(wdev->fck);
+       pm_runtime_put_sync(wdev->dev);
 #else
        printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
 #endif
@@ -292,19 +288,7 @@ static int __devinit omap_wdt_probe(struct platform_device *pdev)
 
        wdev->omap_wdt_users = 0;
        wdev->mem = mem;
-
-       wdev->ick = clk_get(&pdev->dev, "ick");
-       if (IS_ERR(wdev->ick)) {
-               ret = PTR_ERR(wdev->ick);
-               wdev->ick = NULL;
-               goto err_clk;
-       }
-       wdev->fck = clk_get(&pdev->dev, "fck");
-       if (IS_ERR(wdev->fck)) {
-               ret = PTR_ERR(wdev->fck);
-               wdev->fck = NULL;
-               goto err_clk;
-       }
+       wdev->dev = &pdev->dev;
 
        wdev->base = ioremap(res->start, resource_size(res));
        if (!wdev->base) {
@@ -314,8 +298,8 @@ static int __devinit omap_wdt_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, wdev);
 
-       clk_enable(wdev->ick);
-       clk_enable(wdev->fck);
+       pm_runtime_enable(wdev->dev);
+       pm_runtime_get_sync(wdev->dev);
 
        omap_wdt_disable(wdev);
        omap_wdt_adjust_timeout(timer_margin);
@@ -333,11 +317,7 @@ static int __devinit omap_wdt_probe(struct platform_device *pdev)
                __raw_readl(wdev->base + OMAP_WATCHDOG_REV) & 0xFF,
                timer_margin);
 
-       /* autogate OCP interface clock */
-       __raw_writel(0x01, wdev->base + OMAP_WATCHDOG_SYS_CONFIG);
-
-       clk_disable(wdev->ick);
-       clk_disable(wdev->fck);
+       pm_runtime_put_sync(wdev->dev);
 
        omap_wdt_dev = pdev;
 
@@ -349,12 +329,6 @@ err_misc:
 
 err_ioremap:
        wdev->base = NULL;
-
-err_clk:
-       if (wdev->ick)
-               clk_put(wdev->ick);
-       if (wdev->fck)
-               clk_put(wdev->fck);
        kfree(wdev);
 
 err_kzalloc:
@@ -386,8 +360,6 @@ static int __devexit omap_wdt_remove(struct platform_device *pdev)
        release_mem_region(res->start, resource_size(res));
        platform_set_drvdata(pdev, NULL);
 
-       clk_put(wdev->ick);
-       clk_put(wdev->fck);
        iounmap(wdev->base);
 
        kfree(wdev);