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[ARM] 4961/1: gpiolib support for SA-1100 architecture 

This adds gpiolib support for the SA-1100 arch:
 - Move all GPIO API functions from generic.c into gpio.c
 - Convert all gpio functions into gpiolib callbacks.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dmitry Baryshkov 2008-04-10 13:31:47 +01:00 committed by Russell King
parent c353faa4b2
commit 45528e3817
7 changed files with 82 additions and 51 deletions
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1
arch/arm/Kconfig
View File

@ -426,6 +426,7 @@ config ARCH_SA1100
select GENERIC_GPIO
select GENERIC_TIME
select HAVE_IDE
select HAVE_GPIO_LIB
help
Support for StrongARM 11x0 based boards.

2
arch/arm/mach-sa1100/Makefile
View File

@ -3,7 +3,7 @@
#
# Common support
obj-y := clock.o generic.o irq.o dma.o time.o #nmi-oopser.o
obj-y := clock.o generic.o gpio.o irq.o dma.o time.o #nmi-oopser.o
obj-m :=
obj-n :=
obj- :=

31
arch/arm/mach-sa1100/generic.c
View File

@ -139,37 +139,6 @@ unsigned long long sched_clock(void)
return v;
}
int gpio_direction_input(unsigned gpio)
{
unsigned long flags;
if (gpio > GPIO_MAX)
return -EINVAL;
local_irq_save(flags);
GPDR &= ~GPIO_GPIO(gpio);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(gpio_direction_input);
int gpio_direction_output(unsigned gpio, int value)
{
unsigned long flags;
if (gpio > GPIO_MAX)
return -EINVAL;
local_irq_save(flags);
gpio_set_value(gpio, value);
GPDR |= GPIO_GPIO(gpio);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(gpio_direction_output);
/*
* Default power-off for SA1100
*/

1
arch/arm/mach-sa1100/generic.h
View File

@ -9,6 +9,7 @@ struct sys_timer;
extern struct sys_timer sa1100_timer;
extern void __init sa1100_map_io(void);
extern void __init sa1100_init_irq(void);
extern void __init sa1100_init_gpio(void);
#define SET_BANK(__nr,__start,__size) \
mi->bank[__nr].start = (__start), \

65
arch/arm/mach-sa1100/gpio.c Normal file
View File

@ -0,0 +1,65 @@
/*
* linux/arch/arm/mach-sa1100/gpio.c
*
* Generic SA-1100 GPIO handling
*
* 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/init.h>
#include <linux/module.h>
#include <asm/gpio.h>
#include <asm/hardware.h>
#include "generic.h"
static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
{
return GPLR & GPIO_GPIO(offset);
}
static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
if (value)
GPSR = GPIO_GPIO(offset);
else
GPCR = GPIO_GPIO(offset);
}
static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
{
unsigned long flags;
local_irq_save(flags);
GPDR &= ~GPIO_GPIO(offset);
local_irq_restore(flags);
return 0;
}
static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
{
unsigned long flags;
local_irq_save(flags);
sa1100_gpio_set(chip, offset, value);
GPDR |= GPIO_GPIO(offset);
local_irq_restore(flags);
return 0;
}
static struct gpio_chip sa1100_gpio_chip = {
.label = "gpio",
.direction_input = sa1100_direction_input,
.direction_output = sa1100_direction_output,
.set = sa1100_gpio_set,
.get = sa1100_gpio_get,
.base = 0,
.ngpio = GPIO_MAX + 1,
};
void __init sa1100_init_gpio(void)
{
gpiochip_add(&sa1100_gpio_chip);
}

2
arch/arm/mach-sa1100/irq.c
View File

@ -347,4 +347,6 @@ void __init sa1100_init_irq(void)
*/
set_irq_chip(IRQ_GPIO11_27, &sa1100_normal_chip);
set_irq_chained_handler(IRQ_GPIO11_27, sa1100_high_gpio_handler);
sa1100_init_gpio();
}

31
include/asm-arm/arch-sa1100/gpio.h
View File

@ -26,35 +26,28 @@
#include <asm/hardware.h>
#include <asm/irq.h>
static inline int gpio_request(unsigned gpio, const char *label)
{
return 0;
}
static inline void gpio_free(unsigned gpio)
{
return;
}
extern int gpio_direction_input(unsigned gpio);
extern int gpio_direction_output(unsigned gpio, int value);
#include <asm-generic/gpio.h>
static inline int gpio_get_value(unsigned gpio)
{
return GPLR & GPIO_GPIO(gpio);
if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX))
return GPLR & GPIO_GPIO(gpio);
else
return __gpio_get_value(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
if (value)
GPSR = GPIO_GPIO(gpio);
if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX))
if (value)
GPSR = GPIO_GPIO(gpio);
else
GPCR = GPIO_GPIO(gpio);
else
GPCR = GPIO_GPIO(gpio);
__gpio_set_value(gpio, value);
}
#include <asm-generic/gpio.h> /* cansleep wrappers */
#define gpio_cansleep __gpio_cansleep
static inline unsigned gpio_to_irq(unsigned gpio)
{