Datta, Shubhrajyoti had written, on 05/12/2010 03:52 AM, the following:
Adding board support for the proximity sensor.
Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx>
---
arch/arm/mach-omap2/board-4430sdp.c | 71 +++++++++++++++++++++++++++++++++++
1 files changed, 71 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index b88f28c..beb3059 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -18,6 +18,7 @@
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/usb/otg.h>
+#include <linux/input/sfh7741.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -31,7 +32,25 @@
#include <plat/usb.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>
+#define OMAP4_SFH7741_SENSOR_OUTPUT_GPIO 184
+#define OMAP4_SFH7741_ENABLE_GPIO 188
+static void omap_prox_activate(int state);
+static int omap_prox_read(void);
+
+static struct sfh7741_platform_data omap_sfh7741_data = {
+ .irq = OMAP_GPIO_IRQ(OMAP4_SFH7741_SENSOR_OUTPUT_GPIO),
+ .prox_enable = 1,
+ .activate_func = omap_prox_activate,
+ .read_prox = omap_prox_read,
+};
+static struct platform_device sdp4430_proximity_device = {
+ .name = "sfh7741",
+ .id = 1,
+ .dev = {
+ .platform_data = &omap_sfh7741_data,
+ },
+};
static struct platform_device sdp4430_lcd_device = {
.name = "sdp4430_lcd",
.id = -1,
@@ -39,6 +58,7 @@ static struct platform_device sdp4430_lcd_device = {
static struct platform_device *sdp4430_devices[] __initdata = {
&sdp4430_lcd_device,
+ &sdp4430_proximity_device,
};
static struct omap_lcd_config sdp4430_lcd_config __initdata = {
@@ -111,6 +131,56 @@ static struct omap_musb_board_data musb_board_data = {
.power = 100,
};
+static void omap_prox_activate(int state)
+{
+ gpio_set_value(OMAP4_SFH7741_ENABLE_GPIO , state);
+}
+
+static int omap_prox_read(void)
+{
+ int proximity;
+ proximity = gpio_get_value(OMAP4_SFH7741_SENSOR_OUTPUT_GPIO);
+ return proximity;
+}
+
+static void omap_sfh7741prox_init(void)
+{
+ char *desc = "sfh7741";
+ int error;
+
+ error = gpio_request(OMAP4_SFH7741_SENSOR_OUTPUT_GPIO, "sfh7741");
+ if (error < 0) {
+ pr_err("%s: GPIO configuration failed: GPIO %d, error %d\n"
+ , __func__, OMAP4_SFH7741_SENSOR_OUTPUT_GPIO, error);
+ return ;
+ }
+
+ error = gpio_direction_input(OMAP4_SFH7741_SENSOR_OUTPUT_GPIO);
+ if (error < 0) {
+ pr_err("Proximity GPIO input configuration failed\n");
+ goto fail1;
+ }
+
+ error = gpio_request(OMAP4_SFH7741_ENABLE_GPIO, "sfh7741");
+ if (error < 0) {
+ pr_err("failed to request GPIO %d, error %d\n",
+ OMAP4_SFH7741_ENABLE_GPIO, error);
+ goto fail1;
+ }
+
+ error = gpio_direction_output(OMAP4_SFH7741_ENABLE_GPIO , 1);
+ if (error < 0) {
+ pr_err("%s: GPIO configuration failed: GPIO %d,\
+ error %d\n",__func__, OMAP4_SFH7741_ENABLE_GPIO, error);
+ goto fail3;
+ }
+ return;
+
+fail3:
+ gpio_free(OMAP4_SFH7741_ENABLE_GPIO);
+fail1:
+ gpio_free(OMAP4_SFH7741_SENSOR_OUTPUT_GPIO);
+}
a) mux handling?
b) if init failed, still register the prox device? it wont function right?
static void __init omap_4430sdp_init(void)
{
platform_add_devices(sdp4430_devices, ARRAY_SIZE(sdp4430_devices));
@@ -120,6 +190,7 @@ static void __init omap_4430sdp_init(void)
/* FIXME: allow multi-omap to boot until musb is updated for omap4 */
if (!cpu_is_omap44xx())
usb_musb_init(&musb_board_data);
+ omap_sfh7741prox_init();
}
static void __init omap_4430sdp_map_io(void)
--
Regards,
Nishanth Menon
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