[ARM] pxa: update pxa27x keypad driver to use clk support

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 20 insertions, 5 deletions

diff --git a/drivers/input/keyboard/pxa27x_keyboard.c b/drivers/input/keyboard/pxa27x_keyboard.c
index ebe5eacf2990..b7061aa38816 100644
--- a/drivers/input/keyboard/pxa27x_keyboard.c
+++ b/drivers/input/keyboard/pxa27x_keyboard.c
@@ -23,6 +23,8 @@
 #include <linux/input.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -40,6 +42,8 @@
                                  col/2 == 2 ? KPASMKP2 : KPASMKP3)
 #define KPASMKPx_MKC(row, col)  (1 << (row + 16 * (col % 2)))
 
+static struct clk *pxakbd_clk;
+
 static irqreturn_t pxakbd_irq_handler(int irq, void *dev_id)
 {
         struct platform_device *pdev = dev_id;
@@ -104,7 +108,7 @@ static int pxakbd_open(struct input_dev *dev)
         KPREC = 0x7F;
 
         /* Enable unit clock */
-        pxa_set_cken(CKEN_KEYPAD, 1);
+        clk_enable(pxakbd_clk);
 
         return 0;
 }
@@ -112,7 +116,7 @@ static int pxakbd_open(struct input_dev *dev)
 static void pxakbd_close(struct input_dev *dev)
 {
         /* Disable clock unit */
-        pxa_set_cken(CKEN_KEYPAD, 0);
+        clk_disable(pxakbd_clk);
 }
 
 #ifdef CONFIG_PM
@@ -140,7 +144,8 @@ static int pxakbd_resume(struct platform_device *pdev)
                 KPREC = pdata->reg_kprec;
 
                 /* Enable unit clock */
-                pxa_set_cken(CKEN_KEYPAD, 1);
+                clk_disable(pxakbd_clk);
+                clk_enable(pxakbd_clk);
         }
 
         mutex_unlock(&input_dev->mutex);
@@ -158,11 +163,18 @@ static int __devinit pxakbd_probe(struct platform_device *pdev)
         struct input_dev *input_dev;
         int i, row, col, error;
 
+        pxakbd_clk = clk_get(&pdev->dev, "KBDCLK");
+        if (IS_ERR(pxakbd_clk)) {
+                error = PTR_ERR(pxakbd_clk);
+                goto err_clk;
+        }
+
         /* Create and register the input driver. */
         input_dev = input_allocate_device();
         if (!input_dev) {
                 printk(KERN_ERR "Cannot request keypad device\n");
-                return -ENOMEM;
+                error = -ENOMEM;
+                goto err_alloc;
         }
 
         input_dev->name = DRIVER_NAME;
@@ -185,7 +197,6 @@ static int __devinit pxakbd_probe(struct platform_device *pdev)
                             DRIVER_NAME, pdev);
         if (error) {
                 printk(KERN_ERR "Cannot request keypad IRQ\n");
-                pxa_set_cken(CKEN_KEYPAD, 0);
                 goto err_free_dev;
         }
 
@@ -217,6 +228,9 @@ static int __devinit pxakbd_probe(struct platform_device *pdev)
         free_irq(IRQ_KEYPAD, pdev);
  err_free_dev:
         input_free_device(input_dev);
+ err_alloc:
+        clk_put(pxakbd_clk);
+ err_clk:
         return error;
 }
 
@@ -226,6 +240,7 @@ static int __devexit pxakbd_remove(struct platform_device *pdev)
 
         input_unregister_device(input_dev);
         free_irq(IRQ_KEYPAD, pdev);
+        clk_put(pxakbd_clk);
         platform_set_drvdata(pdev, NULL);
 
         return 0;