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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-10-06 14:35:16 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-12-06 16:52:24 +0000
commit0831e3e4cf8abcbb772c0cb1eb4406ffcdb974df (patch)
treee2857742ac48d122c4a858578b4d46597dfb7e87 /arch/arm/mach-sa1100
parenta5d176a19138eef45e4c7c80a8d3a7c14c8aec53 (diff)
downloadlinux-2.6.34-ux500-0831e3e4cf8abcbb772c0cb1eb4406ffcdb974df.tar.gz
ARM: iPAQ: provide a way to setup platform-controlled GPIOs
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100')
-rw-r--r--arch/arm/mach-sa1100/h3600.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/h3600.c b/arch/arm/mach-sa1100/h3600.c
index c51432bad46..2b545a4baa0 100644
--- a/arch/arm/mach-sa1100/h3600.c
+++ b/arch/arm/mach-sa1100/h3600.c
@@ -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",