From: Shiraz Hashim <shiraz.hashim@st.com>
Date: Sun, 8 Jul 2012 01:00:36 +0000 (-0700)
Subject: Input: spear_keyboard - use correct io accessors
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=e99191f0391973326dd4de5cee5a72bf5aeb7040;p=deliverable%2Flinux.git

Input: spear_keyboard - use correct io accessors

All SPEAr keyboard registers are 32 bit wide and are word aligned. This
patch aligns all io access to be word size using relaxed version of
readl/writel.

Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c
index 45dd02cbcaa0..10dda9f8e706 100644
--- a/drivers/input/keyboard/spear-keyboard.c
+++ b/drivers/input/keyboard/spear-keyboard.c
@@ -27,9 +27,9 @@
 #include <plat/keyboard.h>
 
 /* Keyboard Registers */
-#define MODE_REG	0x00	/* 16 bit reg */
-#define STATUS_REG	0x0C	/* 2 bit reg */
-#define DATA_REG	0x10	/* 8 bit reg */
+#define MODE_REG	0x00
+#define STATUS_REG	0x0C
+#define DATA_REG	0x10
 #define INTR_MASK	0x54
 
 /* Register Values */
@@ -72,9 +72,9 @@ static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
 	struct spear_kbd *kbd = dev_id;
 	struct input_dev *input = kbd->input;
 	unsigned int key;
-	u8 sts, val;
+	u32 sts, val;
 
-	sts = readb(kbd->io_base + STATUS_REG);
+	sts = readl_relaxed(kbd->io_base + STATUS_REG);
 	if (!(sts & DATA_AVAIL))
 		return IRQ_NONE;
 
@@ -84,7 +84,7 @@ static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
 	}
 
 	/* following reads active (row, col) pair */
-	val = readb(kbd->io_base + DATA_REG);
+	val = readl_relaxed(kbd->io_base + DATA_REG);
 	key = kbd->keycodes[val];
 
 	input_event(input, EV_MSC, MSC_SCAN, val);
@@ -94,7 +94,7 @@ static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
 	kbd->last_key = key;
 
 	/* clear interrupt */
-	writeb(0, kbd->io_base + STATUS_REG);
+	writel_relaxed(0, kbd->io_base + STATUS_REG);
 
 	return IRQ_HANDLED;
 }
@@ -103,7 +103,7 @@ static int spear_kbd_open(struct input_dev *dev)
 {
 	struct spear_kbd *kbd = input_get_drvdata(dev);
 	int error;
-	u16 val;
+	u32 val;
 
 	kbd->last_key = KEY_RESERVED;
 
@@ -114,13 +114,13 @@ static int spear_kbd_open(struct input_dev *dev)
 	/* program keyboard */
 	val = SCAN_RATE_80 | MODE_KEYBOARD | PCLK_FREQ_MSK |
 		(kbd->mode << KEY_MATRIX_SHIFT);
-	writew(val, kbd->io_base + MODE_REG);
-	writeb(1, kbd->io_base + STATUS_REG);
+	writel_relaxed(val, kbd->io_base + MODE_REG);
+	writel_relaxed(1, kbd->io_base + STATUS_REG);
 
 	/* start key scan */
-	val = readw(kbd->io_base + MODE_REG);
+	val = readl_relaxed(kbd->io_base + MODE_REG);
 	val |= START_SCAN;
-	writew(val, kbd->io_base + MODE_REG);
+	writel_relaxed(val, kbd->io_base + MODE_REG);
 
 	return 0;
 }
@@ -128,12 +128,12 @@ static int spear_kbd_open(struct input_dev *dev)
 static void spear_kbd_close(struct input_dev *dev)
 {
 	struct spear_kbd *kbd = input_get_drvdata(dev);
-	u16 val;
+	u32 val;
 
 	/* stop key scan */
-	val = readw(kbd->io_base + MODE_REG);
+	val = readl_relaxed(kbd->io_base + MODE_REG);
 	val &= ~START_SCAN;
-	writew(val, kbd->io_base + MODE_REG);
+	writel_relaxed(val, kbd->io_base + MODE_REG);
 
 	clk_disable(kbd->clk);