mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
f23c144d42
The code that adds each ColdFire platforms GPIO signals is duplicated in each platforms specific code. Remove it from each platforms code and put a single version in the existing ColdFire gpio subsystem init code. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Steven King <sfking@fdwdc.com>
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*
|
|
* Coldfire generic GPIO support.
|
|
*
|
|
* (C) Copyright 2009, Steven King <sfking@fdwdc.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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
|
|
#include <asm/gpio.h>
|
|
#include <asm/pinmux.h>
|
|
#include <asm/mcfgpio.h>
|
|
|
|
#define MCF_CHIP(chip) container_of(chip, struct mcf_gpio_chip, gpio_chip)
|
|
|
|
int mcf_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
unsigned long flags;
|
|
MCFGPIO_PORTTYPE dir;
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
local_irq_save(flags);
|
|
dir = mcfgpio_read(mcf_chip->pddr);
|
|
dir &= ~mcfgpio_bit(chip->base + offset);
|
|
mcfgpio_write(dir, mcf_chip->pddr);
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mcf_gpio_get_value(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
return mcfgpio_read(mcf_chip->ppdr) & mcfgpio_bit(chip->base + offset);
|
|
}
|
|
|
|
int mcf_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
|
|
int value)
|
|
{
|
|
unsigned long flags;
|
|
MCFGPIO_PORTTYPE data;
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
local_irq_save(flags);
|
|
/* write the value to the output latch */
|
|
data = mcfgpio_read(mcf_chip->podr);
|
|
if (value)
|
|
data |= mcfgpio_bit(chip->base + offset);
|
|
else
|
|
data &= ~mcfgpio_bit(chip->base + offset);
|
|
mcfgpio_write(data, mcf_chip->podr);
|
|
|
|
/* now set the direction to output */
|
|
data = mcfgpio_read(mcf_chip->pddr);
|
|
data |= mcfgpio_bit(chip->base + offset);
|
|
mcfgpio_write(data, mcf_chip->pddr);
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mcf_gpio_set_value(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
unsigned long flags;
|
|
MCFGPIO_PORTTYPE data;
|
|
|
|
local_irq_save(flags);
|
|
data = mcfgpio_read(mcf_chip->podr);
|
|
if (value)
|
|
data |= mcfgpio_bit(chip->base + offset);
|
|
else
|
|
data &= ~mcfgpio_bit(chip->base + offset);
|
|
mcfgpio_write(data, mcf_chip->podr);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
void mcf_gpio_set_value_fast(struct gpio_chip *chip, unsigned offset, int value)
|
|
{
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
if (value)
|
|
mcfgpio_write(mcfgpio_bit(chip->base + offset), mcf_chip->setr);
|
|
else
|
|
mcfgpio_write(~mcfgpio_bit(chip->base + offset), mcf_chip->clrr);
|
|
}
|
|
|
|
int mcf_gpio_request(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
return mcf_chip->gpio_to_pinmux ?
|
|
mcf_pinmux_request(mcf_chip->gpio_to_pinmux[offset], 0) : 0;
|
|
}
|
|
|
|
void mcf_gpio_free(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct mcf_gpio_chip *mcf_chip = MCF_CHIP(chip);
|
|
|
|
mcf_gpio_direction_input(chip, offset);
|
|
|
|
if (mcf_chip->gpio_to_pinmux)
|
|
mcf_pinmux_release(mcf_chip->gpio_to_pinmux[offset], 0);
|
|
}
|
|
|
|
struct bus_type mcf_gpio_subsys = {
|
|
.name = "gpio",
|
|
.dev_name = "gpio",
|
|
};
|
|
|
|
static int __init mcf_gpio_sysinit(void)
|
|
{
|
|
unsigned int i = 0;
|
|
|
|
while (i < mcf_gpio_chips_size)
|
|
gpiochip_add((struct gpio_chip *)&mcf_gpio_chips[i++]);
|
|
return subsys_system_register(&mcf_gpio_subsys, NULL);
|
|
}
|
|
|
|
core_initcall(mcf_gpio_sysinit);
|