Commit 838c6d49 authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Ben Dooks

ARM: SAMSUNG: move driver strength gpio configuration helper to common dir

Driver strength parameter can be changed not only on S5PC100 but also
on S5PV210/S5PC110 platforms, so move the helper functions to the common
plat-samsung directory.
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 14b8a0f9
......@@ -13,6 +13,7 @@ config PLAT_S5P
select NO_IOPORT
select ARCH_REQUIRE_GPIOLIB
select S3C_GPIO_TRACK
select S5P_GPIO_DRVSTR
select SAMSUNG_GPIOLIB_4BIT
select S3C_GPIO_CFG_S3C64XX
select S3C_GPIO_PULL_UPDOWN
......
......@@ -16,9 +16,9 @@ config PLAT_S5PC1XX
select SAMSUNG_IRQ_VIC_TIMER
select S3C_GPIO_TRACK
select S3C_GPIO_PULL_UPDOWN
select S5P_GPIO_DRVSTR
select S3C_GPIO_CFG_S3C24XX
select S3C_GPIO_CFG_S3C64XX
select S5P_GPIO_CFG_S5PC1XX
help
Base platform code for any Samsung S5PC1XX device
......
......@@ -24,7 +24,6 @@ obj-$(CONFIG_CPU_S5PC100_CLOCK) += s5pc100-clock.o
# Device setup
obj-$(CONFIG_S5P_GPIO_CFG_S5PC1XX) += gpio-config.o
obj-$(CONFIG_S5PC1XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
obj-$(CONFIG_S5PC1XX_SETUP_I2C0) += setup-i2c0.o
obj-$(CONFIG_S5PC1XX_SETUP_I2C1) += setup-i2c1.o
......
/* 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 <plat/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);
/* linux/arch/arm/plat-s5pc1xx/include/plat/gpio-cfg.h
*
* Copyright 2009 Samsung Electronic
*
* S5PC1XX Platform - GPIO pin configuration
*
* 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.
*/
/* This file contains the necessary definitions to get the basic gpio
* pin configuration done such as setting a pin to input or output or
* changing the pull-{up,down} configurations.
*/
#ifndef __GPIO_CFG_S5PC1XX_H
#define __GPIO_CFG_S5PC1XX_H __FILE__
typedef unsigned int __bitwise__ s5p_gpio_drvstr_t;
#define S5P_GPIO_DRVSTR_LV1 0x00
#define S5P_GPIO_DRVSTR_LV2 0x01
#define S5P_GPIO_DRVSTR_LV3 0x10
#define S5P_GPIO_DRVSTR_LV4 0x11
extern s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin, unsigned int off);
extern int s5p_gpio_set_drvstr(unsigned int pin, unsigned int off,
s5p_gpio_drvstr_t drvstr);
#endif /* __GPIO_CFG_S5PC1XX_H */
......@@ -19,7 +19,6 @@
#include <mach/map.h>
#include <plat/fb.h>
#include <plat/gpio-cfg.h>
#include <plat/gpio-cfg-s5pc1xx.h>
#define DISR_OFFSET 0x7008
......
......@@ -90,12 +90,6 @@ config S3C_GPIO_CFG_S3C64XX
Internal configuration to enable S3C64XX style GPIO configuration
functions.
config S5P_GPIO_CFG_S5PC1XX
bool
help
Internal configuration to enable S5PC1XX style GPIO configuration
functions.
config S3C_GPIO_PULL_UPDOWN
bool
help
......@@ -111,6 +105,12 @@ config S3C_GPIO_PULL_UP
help
Internal configuration to enable the correct GPIO pull helper
config S5P_GPIO_DRVSTR
bool
help
Internal configuration to get and set correct GPIO driver strength
helper
config SAMSUNG_GPIO_EXTRA
int "Number of additional GPIO pins"
default 0
......
......@@ -261,3 +261,51 @@ s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
}
#endif /* CONFIG_S3C_GPIO_PULL_UP */
#ifdef CONFIG_S5P_GPIO_DRVSTR
s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
unsigned int off;
void __iomem *reg;
int shift;
u32 drvstr;
if (!chip)
return -EINVAL;
off = chip->chip.base - pin;
shift = off * 2;
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, s5p_gpio_drvstr_t drvstr)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
unsigned int off;
void __iomem *reg;
int shift;
u32 tmp;
if (!chip)
return -EINVAL;
off = chip->chip.base - pin;
shift = off * 2;
reg = chip->base + 0x0C;
tmp = __raw_readl(reg);
tmp |= drvstr << shift;
__raw_writel(tmp, reg);
return 0;
}
EXPORT_SYMBOL(s5p_gpio_set_drvstr);
#endif /* CONFIG_S5P_GPIO_DRVSTR */
......@@ -25,6 +25,7 @@
#define __PLAT_GPIO_CFG_H __FILE__
typedef unsigned int __bitwise__ s3c_gpio_pull_t;
typedef unsigned int __bitwise__ s5p_gpio_drvstr_t;
/* forward declaration if gpio-core.h hasn't been included */
struct s3c_gpio_chip;
......@@ -118,4 +119,33 @@ extern int s3c_gpio_setpull(unsigned int pin, s3c_gpio_pull_t pull);
*/
extern s3c_gpio_pull_t s3c_gpio_getpull(unsigned int pin);
/* Define values for the drvstr available for each gpio pin.
*
* These values control the value of the output signal driver strength,
* configurable on most pins on the S5C series.
*/
#define S5P_GPIO_DRVSTR_LV1 ((__force s5p_gpio_drvstr_t)0x00)
#define S5P_GPIO_DRVSTR_LV2 ((__force s5p_gpio_drvstr_t)0x01)
#define S5P_GPIO_DRVSTR_LV3 ((__force s5p_gpio_drvstr_t)0x10)
#define S5P_GPIO_DRVSTR_LV4 ((__force s5p_gpio_drvstr_t)0x11)
/**
* s5c_gpio_get_drvstr() - get the driver streght value of a gpio pin
* @pin: The pin number to get the settings for
*
* Read the driver streght value for the specified pin.
*/
extern s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin);
/**
* s3c_gpio_set_drvstr() - set the driver streght value of a gpio pin
* @pin: The pin number to configure the driver streght value
* @drvstr: The new value of the driver strength
*
* This function sets the driver strength value for the specified pin.
* It will return 0 if successfull, or a negative error code if the pin
* cannot support the requested setting.
*/
extern int s5p_gpio_set_drvstr(unsigned int pin, s5p_gpio_drvstr_t drvstr);
#endif /* __PLAT_GPIO_CFG_H */
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