1/*
 2 * linux/arch/arm/mach-sa1100/gpio.c
 3 *
 4 * Generic SA-1100 GPIO handling
 5 *
 6 * This program is free software; you can redistribute it and/or modify
 7 * it under the terms of the GNU General Public License version 2 as
 8 * published by the Free Software Foundation.
 9 */
10#include <linux/gpio.h>
11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/io.h>
14#include <mach/hardware.h>
15#include <mach/irqs.h>
16
17static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
18{
19	return GPLR & GPIO_GPIO(offset);
20}
21
22static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
23{
24	if (value)
25		GPSR = GPIO_GPIO(offset);
26	else
27		GPCR = GPIO_GPIO(offset);
28}
29
30static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
31{
32	unsigned long flags;
33
34	local_irq_save(flags);
35	GPDR &= ~GPIO_GPIO(offset);
36	local_irq_restore(flags);
37	return 0;
38}
39
40static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
41{
42	unsigned long flags;
43
44	local_irq_save(flags);
45	sa1100_gpio_set(chip, offset, value);
46	GPDR |= GPIO_GPIO(offset);
47	local_irq_restore(flags);
48	return 0;
49}
50
51static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset)
52{
53	return offset < 11 ? (IRQ_GPIO0 + offset) : (IRQ_GPIO11 - 11 + offset);
54}
55
56static struct gpio_chip sa1100_gpio_chip = {
57	.label			= "gpio",
58	.direction_input	= sa1100_direction_input,
59	.direction_output	= sa1100_direction_output,
60	.set			= sa1100_gpio_set,
61	.get			= sa1100_gpio_get,
62	.to_irq			= sa1100_to_irq,
63	.base			= 0,
64	.ngpio			= GPIO_MAX + 1,
65};
66
67void __init sa1100_init_gpio(void)
68{
69	gpiochip_add(&sa1100_gpio_chip);
70}

 1/*
 2 * linux/arch/arm/mach-sa1100/gpio.c
 3 *
 4 * Generic SA-1100 GPIO handling
 5 *
 6 * This program is free software; you can redistribute it and/or modify
 7 * it under the terms of the GNU General Public License version 2 as
 8 * published by the Free Software Foundation.
 9 */
10#include <linux/gpio.h>
11#include <linux/init.h>
12#include <linux/module.h>
13
14#include <mach/hardware.h>
15#include <mach/irqs.h>
16
17static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
18{
19	return GPLR & GPIO_GPIO(offset);
20}
21
22static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
23{
24	if (value)
25		GPSR = GPIO_GPIO(offset);
26	else
27		GPCR = GPIO_GPIO(offset);
28}
29
30static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
31{
32	unsigned long flags;
33
34	local_irq_save(flags);
35	GPDR &= ~GPIO_GPIO(offset);
36	local_irq_restore(flags);
37	return 0;
38}
39
40static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
41{
42	unsigned long flags;
43
44	local_irq_save(flags);
45	sa1100_gpio_set(chip, offset, value);
46	GPDR |= GPIO_GPIO(offset);
47	local_irq_restore(flags);
48	return 0;
49}
50
51static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset)
52{
53	return offset < 11 ? (IRQ_GPIO0 + offset) : (IRQ_GPIO11 - 11 + offset);
54}
55
56static struct gpio_chip sa1100_gpio_chip = {
57	.label			= "gpio",
58	.direction_input	= sa1100_direction_input,
59	.direction_output	= sa1100_direction_output,
60	.set			= sa1100_gpio_set,
61	.get			= sa1100_gpio_get,
62	.to_irq			= sa1100_to_irq,
63	.base			= 0,
64	.ngpio			= GPIO_MAX + 1,
65};
66
67void __init sa1100_init_gpio(void)
68{
69	gpiochip_add(&sa1100_gpio_chip);
70}