[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>
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@ -24,6 +24,8 @@
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/at73c213.h>
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#include <linux/gpio_keys.h>
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#include <linux/input.h>
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#include <linux/clk.h>
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#include <mach/hardware.h>
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@ -218,6 +220,56 @@ static struct gpio_led ek_leds[] = {
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}
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};
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/*
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* GPIO Buttons
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*/
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#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
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static struct gpio_keys_button ek_buttons[] = {
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{
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.gpio = AT91_PIN_PA30,
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.code = BTN_3,
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.desc = "Button 3",
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.active_low = 1,
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.wakeup = 1,
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},
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{
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.gpio = AT91_PIN_PA31,
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.code = BTN_4,
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.desc = "Button 4",
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.active_low = 1,
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.wakeup = 1,
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}
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};
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static struct gpio_keys_platform_data ek_button_data = {
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.buttons = ek_buttons,
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.nbuttons = ARRAY_SIZE(ek_buttons),
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};
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static struct platform_device ek_button_device = {
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.name = "gpio-keys",
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.id = -1,
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.num_resources = 0,
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.dev = {
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.platform_data = &ek_button_data,
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}
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};
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static void __init ek_add_device_buttons(void)
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{
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at91_set_gpio_input(AT91_PIN_PA30, 1); /* btn3 */
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at91_set_deglitch(AT91_PIN_PA30, 1);
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at91_set_gpio_input(AT91_PIN_PA31, 1); /* btn4 */
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at91_set_deglitch(AT91_PIN_PA31, 1);
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platform_device_register(&ek_button_device);
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}
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#else
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static void __init ek_add_device_buttons(void) {}
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#endif
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static struct i2c_board_info __initdata ek_i2c_devices[] = {
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{
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I2C_BOARD_INFO("24c512", 0x50),
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@ -245,6 +297,8 @@ static void __init ek_board_init(void)
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at91_add_device_i2c(ek_i2c_devices, ARRAY_SIZE(ek_i2c_devices));
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/* LEDs */
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at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
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/* Push Buttons */
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ek_add_device_buttons();
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/* PCK0 provides MCLK to the WM8731 */
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at91_set_B_periph(AT91_PIN_PC1, 0);
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/* SSC (for WM8731) */
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