[ARM] 5551/1: Add multi-function pin api for w90p910 platform.

Add multi-function pin api for w90p910 platform.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 117 insertions, 1 deletions

diff --git a/arch/arm/mach-w90x900/Makefile b/arch/arm/mach-w90x900/Makefile
index 0c0c1d63f1c7..947316a0a52f 100644
--- a/arch/arm/mach-w90x900/Makefile
+++ b/arch/arm/mach-w90x900/Makefile
@@ -4,7 +4,7 @@
 
 # Object file lists.
 
-obj-y                           := irq.o time.o
+obj-y                           := irq.o time.o mfp-w90p910.o
 
 # W90X900 CPU support files
 
diff --git a/arch/arm/mach-w90x900/mfp-w90p910.c b/arch/arm/mach-w90x900/mfp-w90p910.c
new file mode 100644
index 000000000000..a3520fefb5e7
--- /dev/null
+++ b/arch/arm/mach-w90x900/mfp-w90p910.c
@@ -0,0 +1,116 @@
+/*
+ * linux/arch/arm/mach-w90x900/mfp-w90p910.c
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+
+#define REG_MFSEL       (W90X900_VA_GCR + 0xC)
+
+#define GPSELF          (0x01 << 1)
+
+#define GPSELC          (0x03 << 2)
+#define ENKPI           (0x02 << 2)
+#define ENNAND          (0x01 << 2)
+
+#define GPSELEI0        (0x01 << 26)
+#define GPSELEI1        (0x01 << 27)
+
+static DECLARE_MUTEX(mfp_sem);
+
+void mfp_set_groupf(struct device *dev)
+{
+        unsigned long mfpen;
+        const char *dev_id;
+
+        BUG_ON(!dev);
+
+        down(&mfp_sem);
+
+        dev_id = dev_name(dev);
+
+        mfpen = __raw_readl(REG_MFSEL);
+
+        if (strcmp(dev_id, "w90p910-emc") == 0)
+                mfpen |= GPSELF;/*enable mac*/
+        else
+                mfpen &= ~GPSELF;/*GPIOF[9:0]*/
+
+        __raw_writel(mfpen, REG_MFSEL);
+
+        up(&mfp_sem);
+}
+EXPORT_SYMBOL(mfp_set_groupf);
+
+void mfp_set_groupc(struct device *dev)
+{
+        unsigned long mfpen;
+        const char *dev_id;
+
+        BUG_ON(!dev);
+
+        down(&mfp_sem);
+
+        dev_id = dev_name(dev);
+
+        mfpen = __raw_readl(REG_MFSEL);
+
+        if (strcmp(dev_id, "w90p910-lcd") == 0)
+                mfpen |= GPSELC;/*enable lcd*/
+        else if (strcmp(dev_id, "w90p910-kpi") == 0) {
+                        mfpen &= (~GPSELC);/*enable kpi*/
+                        mfpen |= ENKPI;
+                } else if (strcmp(dev_id, "w90p910-nand") == 0) {
+                                mfpen &= (~GPSELC);/*enable nand*/
+                                mfpen |= ENNAND;
+                        } else
+                                mfpen &= (~GPSELC);/*GPIOC[14:0]*/
+
+        __raw_writel(mfpen, REG_MFSEL);
+
+        up(&mfp_sem);
+}
+EXPORT_SYMBOL(mfp_set_groupc);
+
+void mfp_set_groupi(struct device *dev, int gpio)
+{
+        unsigned long mfpen;
+        const char *dev_id;
+
+        BUG_ON(!dev);
+
+        down(&mfp_sem);
+
+        dev_id = dev_name(dev);
+
+        mfpen = __raw_readl(REG_MFSEL);
+
+        if (strcmp(dev_id, "w90p910-wdog") == 0)
+                mfpen |= GPSELEI1;/*enable wdog*/
+                else if (strcmp(dev_id, "w90p910-atapi") == 0)
+                        mfpen |= GPSELEI0;/*enable atapi*/
+
+        __raw_writel(mfpen, REG_MFSEL);
+
+        up(&mfp_sem);
+}
+EXPORT_SYMBOL(mfp_set_groupi);
+