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omap: 4430sdp board support for proximity sensor

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omap 4430sdp board support for the  proximity sensor via GPIO keys.
The proximity sensor is connected to GPIO and is registered as a
GPIO key.
- Making the default state of the sensor off at bootup
- The init is called before platform_add_devices

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Shubhrajyoti Datta 2010-09-23 18:22:49 -07:00 committed by Tony Lindgren
parent e3333f48dd
commit 94ce7a6628
1 changed files with 61 additions and 0 deletions
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61
arch/arm/mach-omap2/board-4430sdp.c
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@ -20,6 +20,7 @@
#include <linux/usb/otg.h>
#include <linux/spi/spi.h>
#include <linux/i2c/twl.h>
#include <linux/gpio_keys.h>
#include <linux/regulator/machine.h>
#include <linux/leds.h>
@ -40,6 +41,8 @@
#define ETH_KS8851_IRQ 34
#define ETH_KS8851_POWER_ON 48
#define ETH_KS8851_QUART 138
#define OMAP4_SFH7741_SENSOR_OUTPUT_GPIO 184
#define OMAP4_SFH7741_ENABLE_GPIO 188
static struct gpio_led sdp4430_gpio_leds[] = {
{
@ -77,11 +80,47 @@ static struct gpio_led sdp4430_gpio_leds[] = {
};
static struct gpio_keys_button sdp4430_gpio_keys[] = {
{
.desc = "Proximity Sensor",
.type = EV_SW,
.code = SW_FRONT_PROXIMITY,
.gpio = OMAP4_SFH7741_SENSOR_OUTPUT_GPIO,
.active_low = 0,
}
};
static struct gpio_led_platform_data sdp4430_led_data = {
.leds = sdp4430_gpio_leds,
.num_leds = ARRAY_SIZE(sdp4430_gpio_leds),
};
static int omap_prox_activate(struct device *dev)
{
gpio_set_value(OMAP4_SFH7741_ENABLE_GPIO , 1);
return 0;
}
static void omap_prox_deactivate(struct device *dev)
{
gpio_set_value(OMAP4_SFH7741_ENABLE_GPIO , 0);
}
static struct gpio_keys_platform_data sdp4430_gpio_keys_data = {
.buttons = sdp4430_gpio_keys,
.nbuttons = ARRAY_SIZE(sdp4430_gpio_keys),
.enable = omap_prox_activate,
.disable = omap_prox_deactivate,
};
static struct platform_device sdp4430_gpio_keys_device = {
.name = "gpio-keys",
.id = -1,
.dev = {
.platform_data = &sdp4430_gpio_keys_data,
},
};
static struct platform_device sdp4430_leds_gpio = {
.name = "leds-gpio",
.id = -1,
@ -161,6 +200,7 @@ static struct platform_device sdp4430_lcd_device = {
static struct platform_device *sdp4430_devices[] __initdata = {
&sdp4430_lcd_device,
&sdp4430_gpio_keys_device,
&sdp4430_leds_gpio,
};
@ -432,11 +472,32 @@ static int __init omap4_i2c_init(void)
ARRAY_SIZE(sdp4430_i2c_4_boardinfo));
return 0;
}
static void __init omap_sfh7741prox_init(void)
{
int error;
error = gpio_request(OMAP4_SFH7741_ENABLE_GPIO, "sfh7741");
if (error < 0) {
pr_err("%s:failed to request GPIO %d, error %d\n",
__func__, OMAP4_SFH7741_ENABLE_GPIO, error);
return;
}
error = gpio_direction_output(OMAP4_SFH7741_ENABLE_GPIO , 0);
if (error < 0) {
pr_err("%s: GPIO configuration failed: GPIO %d,error %d\n",
__func__, OMAP4_SFH7741_ENABLE_GPIO, error);
gpio_free(OMAP4_SFH7741_ENABLE_GPIO);
}
}
static void __init omap_4430sdp_init(void)
{
int status;
omap4_i2c_init();
omap_sfh7741prox_init();
platform_add_devices(sdp4430_devices, ARRAY_SIZE(sdp4430_devices));
omap_serial_init();
omap4_twl6030_hsmmc_init(mmc);