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[ARM] 4759/1: [AT91] Buttons on CSB300

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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>
This commit is contained in:
Andrew Victor
2008-01-23 09:28:27 +01:00
committed by Russell King
parent a04ff1af97
commit 6d2a8401d2
1 changed files with 61 additions and 0 deletions
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61
arch/arm/mach-at91/board-csb337.c
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@@ -25,6 +25,8 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/spi/spi.h> #include <linux/spi/spi.h>
#include <linux/mtd/physmap.h> #include <linux/mtd/physmap.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <asm/hardware.h> #include <asm/hardware.h>
#include <asm/setup.h> #include <asm/setup.h>
@@ -156,6 +158,63 @@ static struct platform_device csb_flash = {
.num_resources = ARRAY_SIZE(csb_flash_resources), .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) static void __init csb337_board_init(void)
{ {
/* Serial */ /* Serial */
@@ -177,6 +236,8 @@ static void __init csb337_board_init(void)
at91_add_device_mmc(0, &csb337_mmc_data); at91_add_device_mmc(0, &csb337_mmc_data);
/* NOR flash */ /* NOR flash */
platform_device_register(&csb_flash); platform_device_register(&csb_flash);
/* Switches on CSB300 */
csb300_add_device_buttons();
} }
MACHINE_START(CSB337, "Cogent CSB337") MACHINE_START(CSB337, "Cogent CSB337")