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Commit 6d2a8401 authored by Andrew Victor's avatar Andrew Victor Committed by Russell King
Browse files

[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: default avatarAndrew Victor <linux@maxim.org.za>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent a04ff1af

arch/arm/mach-at91/board-csb337.c

+61 −0
Original line number Diff line number Diff line
@@ -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 @@ static struct platform_device csb_flash = { 
	.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 @@ static void __init csb337_board_init(void) 
	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")