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/* linux/arch/arm/plat-s5pc1xx/gpio-config.c
*
* Copyright 2009 Samsung Electronics
*
* S5PC1XX GPIO Configuration.
*
* Based on plat-s3c64xx/gpio-config.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <mach/gpio-core.h>
#include <plat/gpio-cfg-s5pc1xx.h>
s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin, unsigned int off)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
void __iomem *reg;
int shift = off * 2;
u32 drvstr;
if (!chip)
return -EINVAL;
reg = chip->base + 0x0C;
drvstr = __raw_readl(reg);
drvstr = 0xffff & (0x3 << shift);
drvstr = drvstr >> shift;
return (__force s5p_gpio_drvstr_t)drvstr;
}
EXPORT_SYMBOL(s5p_gpio_get_drvstr);
int s5p_gpio_set_drvstr(unsigned int pin, unsigned int off,
s5p_gpio_drvstr_t drvstr)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
void __iomem *reg;
int shift = off * 2;
u32 tmp;
if (!chip)
return -EINVAL;
reg = chip->base + 0x0C;
tmp = __raw_readl(reg);
tmp |= drvstr << shift;
__raw_writel(tmp, reg);
return 0;
}
EXPORT_SYMBOL(s5p_gpio_set_drvstr);
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