omap 4430sdp board support for the 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@xxxxxx>
---
arch/arm/mach-omap2/board-4430sdp.c | 61 +++++++++++++++++++++++++++++++++++
1 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 9447644..f31d68e 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -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,
};
@@ -426,11 +466,32 @@ static int __init omap4_i2c_init(void)
omap_register_i2c_bus(4, 400, NULL, 0);
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);
--
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