[ARM] 4759/1: [AT91] Buttons on CSB300
Support for the 3 GPIO-connected buttons on the CSB300 board.
Based on wakeup testing code from David Brownell.
Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-at91/board-csb337.c b/arch/arm/mach-at91/board-csb337.c
index d0aa20c..51cb3c8 100644
--- a/arch/arm/mach-at91/board-csb337.c
+++ b/arch/arm/mach-at91/board-csb337.c
@@ -25,6 +25,8 @@
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/mtd/physmap.h>
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
#include <asm/hardware.h>
#include <asm/setup.h>
@@ -156,6 +158,63 @@
.num_resources = ARRAY_SIZE(csb_flash_resources),
};
+/*
+ * GPIO Buttons (on CSB300)
+ */
+#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
+static struct gpio_keys_button csb300_buttons[] = {
+ {
+ .gpio = AT91_PIN_PB29,
+ .code = BTN_0,
+ .desc = "sw0",
+ .active_low = 1,
+ .wakeup = 1,
+ },
+ {
+ .gpio = AT91_PIN_PB28,
+ .code = BTN_1,
+ .desc = "sw1",
+ .active_low = 1,
+ .wakeup = 1,
+ },
+ {
+ .gpio = AT91_PIN_PA21,
+ .code = BTN_2,
+ .desc = "sw2",
+ .active_low = 1,
+ .wakeup = 1,
+ }
+};
+
+static struct gpio_keys_platform_data csb300_button_data = {
+ .buttons = csb300_buttons,
+ .nbuttons = ARRAY_SIZE(csb300_buttons),
+};
+
+static struct platform_device csb300_button_device = {
+ .name = "gpio-keys",
+ .id = -1,
+ .num_resources = 0,
+ .dev = {
+ .platform_data = &csb300_button_data,
+ }
+};
+
+static void __init csb300_add_device_buttons(void)
+{
+ at91_set_gpio_input(AT91_PIN_PB29, 0); /* sw0 */
+ at91_set_deglitch(AT91_PIN_PB29, 1);
+ at91_set_gpio_input(AT91_PIN_PB28, 0); /* sw1 */
+ at91_set_deglitch(AT91_PIN_PB28, 1);
+ at91_set_gpio_input(AT91_PIN_PA21, 0); /* sw2 */
+ at91_set_deglitch(AT91_PIN_PA21, 1);
+
+ platform_device_register(&csb300_button_device);
+}
+#else
+static void __init csb300_add_device_buttons(void) {}
+#endif
+
static void __init csb337_board_init(void)
{
/* Serial */
@@ -177,6 +236,8 @@
at91_add_device_mmc(0, &csb337_mmc_data);
/* NOR flash */
platform_device_register(&csb_flash);
+ /* Switches on CSB300 */
+ csb300_add_device_buttons();
}
MACHINE_START(CSB337, "Cogent CSB337")