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Commit d0f9b55e authored by Andrew Victor's avatar Andrew Victor Committed by Russell King
Browse files

[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: default avatarAndrew Victor <andrew@sanpeople.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent cdf95c73

arch/arm/mach-at91/board-sam9261ek.c

+66 −0
Original line number Diff line number Diff line
@@ -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 @@ static struct atmel_lcdfb_info __initdata ek_lcdc_data; 
#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 @@ static void __init ek_board_init(void) 
#endif

	/* LCD Controller */

	at91_add_device_lcdc(&ek_lcdc_data);

	/* Push Buttons */

	ek_add_device_buttons();

}



MACHINE_START(AT91SAM9261EK, "Atmel AT91SAM9261-EK")