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ARM: iPAQ: provide a way to setup platform-controlled GPIOs

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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2009-10-06 14:35:16 +01:00
parent a5d176a191
commit 0831e3e4cf
1 changed files with 42 additions and 0 deletions
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42
arch/arm/mach-sa1100/h3600.c
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@ -28,6 +28,7 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/serial_core.h>
#include <linux/gpio.h>
#include <asm/irq.h>
#include <mach/hardware.h>
@ -49,6 +50,47 @@
void (*assign_h3600_egpio)(enum ipaq_egpio_type x, int level);
EXPORT_SYMBOL(assign_h3600_egpio);
struct gpio_default_state {
int gpio;
int mode;
const char *name;
};
#define GPIO_MODE_IN -1
#define GPIO_MODE_OUT0 0
#define GPIO_MODE_OUT1 1
static void h3xxx_init_gpio(struct gpio_default_state *s, size_t n)
{
while (n--) {
const char *name = s->name;
int err;
if (!name)
name = "[init]";
err = gpio_request(s->gpio, name);
if (err) {
printk(KERN_ERR "gpio%u: unable to request: %d\n",
s->gpio, err);
continue;
}
if (s->mode >= 0) {
err = gpio_direction_output(s->gpio, s->mode);
} else {
err = gpio_direction_input(s->gpio);
}
if (err) {
printk(KERN_ERR "gpio%u: unable to set direction: %d\n",
s->gpio, err);
continue;
}
if (!s->name)
gpio_free(s->gpio);
s++;
}
}
static struct mtd_partition h3xxx_partitions[] = {
{
.name = "H3XXX boot firmware",