[ARM] pxa/spitz: add gpio button support (fixes regression)

Updating desc for lid keys and resending patch with proper comments:
Define Spitz buttons as GPIO keys in a way compatible with the old driver:

On/Off: As Suspend EV_PWR key
Raw values of lid sensors SWA and SWB: As EV_SW switches
SWA: Display Down
SWB: Lid Closed
Recommended user space decoding:
SWA==0 & SWB==0: lid opened (landscape mode)
SWA==1 & SWB==0: invalid (or mechanic race condition)
SWA==0 & SWB==1: lid closed with display up (portrait mode or mechanic
                 race condition while closing to display-less mode)
SWA==1 & SWB==1: lid closed with display down (display-less mode)

AK_INT remote trigger is not mapped as input event. Without complete
remote driver and remote pull-up control it has no useful
interpretation.

Signed-off-by: Stanislav Brabec <utx@penguin.cz>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index ee8d6038ce82be8f0204a1c2bcffc22deba765b3..82ff5733e4dc9c5fdb113bea5d34d8d40d9c0be2 100644 (file)
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
+#include <linux/gpio_keys.h>
 #include <linux/gpio.h>
 #include <linux/leds.h>
 #include <linux/mtd/physmap.h>
@@ -375,6 +376,43 @@ static struct platform_device spitzkbd_device = {
 };
 
 
+static struct gpio_keys_button spitz_gpio_keys[] = {
+       {
+               .type   = EV_PWR,
+               .code   = KEY_SUSPEND,
+               .gpio   = SPITZ_GPIO_ON_KEY,
+               .desc   = "On/Off",
+               .wakeup = 1,
+       },
+       /* Two buttons detecting the lid state */
+       {
+               .type   = EV_SW,
+               .code   = 0,
+               .gpio   = SPITZ_GPIO_SWA,
+               .desc   = "Display Down",
+       },
+       {
+               .type   = EV_SW,
+               .code   = 1,
+               .gpio   = SPITZ_GPIO_SWB,
+               .desc   = "Lid Closed",
+       },
+};
+
+static struct gpio_keys_platform_data spitz_gpio_keys_platform_data = {
+       .buttons        = spitz_gpio_keys,
+       .nbuttons       = ARRAY_SIZE(spitz_gpio_keys),
+};
+
+static struct platform_device spitz_gpio_keys_device = {
+       .name   = "gpio-keys",
+       .id     = -1,
+       .dev    = {
+               .platform_data  = &spitz_gpio_keys_platform_data,
+       },
+};
+
+
 /*
  * Spitz LEDs
  */
@@ -689,6 +727,7 @@ static struct platform_device sharpsl_rom_device = {
 static struct platform_device *devices[] __initdata = {
        &spitzscoop_device,
        &spitzkbd_device,
+       &spitz_gpio_keys_device,
        &spitzled_device,
        &sharpsl_nand_device,
        &sharpsl_rom_device,