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authorNicolas Ferre <nicolas.ferre@atmel.com>2009-06-29 07:11:50 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-06-29 06:19:27 -0400
commit59c5fe6d848cae8fd51498d17532f5aad3866f98 (patch)
treef9975ae202432a8699a86773180b17fbfab73df8 /arch
parent9a24ee03aebc55cec00cc388b6727bff24ed433f (diff)
[ARM] 5562/2: at91: add gpio button support for at91sam9g20ek
This adds input keyboard gpio support on at91sam9g20ek board. It adds button 3 and 4. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-at91/board-sam9g20ek.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/board-sam9g20ek.c b/arch/arm/mach-at91/board-sam9g20ek.c
index cc270beadd5d..a55398ed1211 100644
--- a/arch/arm/mach-at91/board-sam9g20ek.c
+++ b/arch/arm/mach-at91/board-sam9g20ek.c
@@ -24,6 +24,8 @@
24#include <linux/platform_device.h> 24#include <linux/platform_device.h>
25#include <linux/spi/spi.h> 25#include <linux/spi/spi.h>
26#include <linux/spi/at73c213.h> 26#include <linux/spi/at73c213.h>
27#include <linux/gpio_keys.h>
28#include <linux/input.h>
27#include <linux/clk.h> 29#include <linux/clk.h>
28 30
29#include <mach/hardware.h> 31#include <mach/hardware.h>
@@ -218,6 +220,56 @@ static struct gpio_led ek_leds[] = {
218 } 220 }
219}; 221};
220 222
223
224/*
225 * GPIO Buttons
226 */
227#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
228static struct gpio_keys_button ek_buttons[] = {
229 {
230 .gpio = AT91_PIN_PA30,
231 .code = BTN_3,
232 .desc = "Button 3",
233 .active_low = 1,
234 .wakeup = 1,
235 },
236 {
237 .gpio = AT91_PIN_PA31,
238 .code = BTN_4,
239 .desc = "Button 4",
240 .active_low = 1,
241 .wakeup = 1,
242 }
243};
244
245static struct gpio_keys_platform_data ek_button_data = {
246 .buttons = ek_buttons,
247 .nbuttons = ARRAY_SIZE(ek_buttons),
248};
249
250static struct platform_device ek_button_device = {
251 .name = "gpio-keys",
252 .id = -1,
253 .num_resources = 0,
254 .dev = {
255 .platform_data = &ek_button_data,
256 }
257};
258
259static void __init ek_add_device_buttons(void)
260{
261 at91_set_gpio_input(AT91_PIN_PA30, 1); /* btn3 */
262 at91_set_deglitch(AT91_PIN_PA30, 1);
263 at91_set_gpio_input(AT91_PIN_PA31, 1); /* btn4 */
264 at91_set_deglitch(AT91_PIN_PA31, 1);
265
266 platform_device_register(&ek_button_device);
267}
268#else
269static void __init ek_add_device_buttons(void) {}
270#endif
271
272
221static struct i2c_board_info __initdata ek_i2c_devices[] = { 273static struct i2c_board_info __initdata ek_i2c_devices[] = {
222 { 274 {
223 I2C_BOARD_INFO("24c512", 0x50), 275 I2C_BOARD_INFO("24c512", 0x50),
@@ -245,6 +297,8 @@ static void __init ek_board_init(void)
245 at91_add_device_i2c(ek_i2c_devices, ARRAY_SIZE(ek_i2c_devices)); 297 at91_add_device_i2c(ek_i2c_devices, ARRAY_SIZE(ek_i2c_devices));
246 /* LEDs */ 298 /* LEDs */
247 at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds)); 299 at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
300 /* Push Buttons */
301 ek_add_device_buttons();
248 /* PCK0 provides MCLK to the WM8731 */ 302 /* PCK0 provides MCLK to the WM8731 */
249 at91_set_B_periph(AT91_PIN_PC1, 0); 303 at91_set_B_periph(AT91_PIN_PC1, 0);
250 /* SSC (for WM8731) */ 304 /* SSC (for WM8731) */