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

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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>
This commit is contained in:
wanzongshun 2009-06-11 14:30:07 +01:00 committed by Russell King
parent e1baa011a7
commit 27eb97582d
2 changed files with 117 additions and 1 deletions
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2
arch/arm/mach-w90x900/Makefile
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@ -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

116
arch/arm/mach-w90x900/mfp-w90p910.c Normal file
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@ -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);