From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date: Fri, 18 Apr 2014 23:22:00 +0000 (+0100)
Subject: iio: hid-sensors: Proximity: Raw read support
X-Git-Tag: v3.16-rc1~30^2~36^2~1015^2~3
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=1eef062042751822e9f9de418b0f712c6f9b93e8;p=linux.git

iio: hid-sensors: Proximity: Raw read support

Added support for raw reading of channel. If the sensor is powered
off, it will turn on for reading value.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---

diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
index 07e98ec8e9f1..d203ef4d892f 100644
--- a/drivers/iio/light/hid-sensor-prox.c
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -21,6 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/slab.h>
+#include <linux/delay.h>
 #include <linux/hid-sensor-hub.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -75,6 +76,7 @@ static int prox_read_raw(struct iio_dev *indio_dev,
 	u32 address;
 	int ret;
 	int ret_type;
+	s32 poll_value;
 
 	*val = 0;
 	*val2 = 0;
@@ -90,12 +92,24 @@ static int prox_read_raw(struct iio_dev *indio_dev,
 			report_id = -1;
 			break;
 		}
-		if (report_id >= 0)
+		if (report_id >= 0) {
+			poll_value = hid_sensor_read_poll_value(
+					&prox_state->common_attributes);
+			if (poll_value < 0)
+				return -EINVAL;
+
+			hid_sensor_power_state(&prox_state->common_attributes,
+						true);
+
+			msleep_interruptible(poll_value * 2);
+
 			*val = sensor_hub_input_attr_get_raw_value(
 				prox_state->common_attributes.hsdev,
 				HID_USAGE_SENSOR_PROX, address,
 				report_id);
-		else {
+			hid_sensor_power_state(&prox_state->common_attributes,
+						false);
+		} else {
 			*val = 0;
 			return -EINVAL;
 		}