[ARM] 4420/2: AT91: GPIO buttons on SAM9261-EK board
Register the GPIO-connected buttons on the SAM9261-EK board as a
"gpio-keys" platform device.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-at91/board-sam9261ek.c b/arch/arm/mach-at91/board-sam9261ek.c
index 579b41f..42e172c 100644
--- a/arch/arm/mach-at91/board-sam9261ek.c
+++ b/arch/arm/mach-at91/board-sam9261ek.c
@@ -28,6 +28,8 @@
#include <linux/spi/ads7846.h>
#include <linux/dm9000.h>
#include <linux/fb.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
#include <video/atmel_lcdc.h>
@@ -333,6 +335,68 @@
#endif
+/*
+ * GPIO Buttons
+ */
+#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
+static struct gpio_keys_button ek_buttons[] = {
+ {
+ .gpio = AT91_PIN_PA27,
+ .keycode = BTN_0,
+ .desc = "Button 0",
+ .active_low = 1,
+ },
+ {
+ .gpio = AT91_PIN_PA26,
+ .keycode = BTN_1,
+ .desc = "Button 1",
+ .active_low = 1,
+ },
+ {
+ .gpio = AT91_PIN_PA25,
+ .keycode = BTN_2,
+ .desc = "Button 2",
+ .active_low = 1,
+ },
+ {
+ .gpio = AT91_PIN_PA24,
+ .keycode = BTN_3,
+ .desc = "Button 3",
+ .active_low = 1,
+ }
+};
+
+static struct gpio_keys_platform_data ek_button_data = {
+ .buttons = ek_buttons,
+ .nbuttons = ARRAY_SIZE(ek_buttons),
+};
+
+static struct platform_device ek_button_device = {
+ .name = "gpio-keys",
+ .id = -1,
+ .num_resources = 0,
+ .dev = {
+ .platform_data = &ek_button_data,
+ }
+};
+
+static void __init ek_add_device_buttons(void)
+{
+ at91_set_gpio_input(AT91_PIN_PB27, 0); /* btn0 */
+ at91_set_deglitch(AT91_PIN_PB27, 1);
+ at91_set_gpio_input(AT91_PIN_PB26, 0); /* btn1 */
+ at91_set_deglitch(AT91_PIN_PB26, 1);
+ at91_set_gpio_input(AT91_PIN_PB25, 0); /* btn2 */
+ at91_set_deglitch(AT91_PIN_PB25, 1);
+ at91_set_gpio_input(AT91_PIN_PB24, 0); /* btn3 */
+ at91_set_deglitch(AT91_PIN_PB24, 1);
+
+ platform_device_register(&ek_button_device);
+}
+#else
+static void __init ek_add_device_buttons(void) {}
+#endif
+
static void __init ek_board_init(void)
{
/* Serial */
@@ -360,6 +424,8 @@
#endif
/* LCD Controller */
at91_add_device_lcdc(&ek_lcdc_data);
+ /* Push Buttons */
+ ek_add_device_buttons();
}
MACHINE_START(AT91SAM9261EK, "Atmel AT91SAM9261-EK")