4 files changed, 36 insertions, 21 deletions

diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
index 547e7f9d6920..df0647856e5d 100644
--- a/drivers/iio/light/apds9960.c
+++ b/drivers/iio/light/apds9960.c
@@ -8,6 +8,7 @@
  * TODO: gesture + proximity calib offsets
  */
 
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -1113,6 +1114,12 @@ static const struct i2c_device_id apds9960_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, apds9960_id);
 
+static const struct acpi_device_id apds9960_acpi_match[] = {
+	{ "MSHW0184" },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, apds9960_acpi_match);
+
 static const struct of_device_id apds9960_of_match[] = {
 	{ .compatible = "avago,apds9960" },
 	{ }
@@ -1124,6 +1131,7 @@ static struct i2c_driver apds9960_driver = {
 		.name	= APDS9960_DRV_NAME,
 		.of_match_table = apds9960_of_match,
 		.pm	= &apds9960_pm_ops,
+		.acpi_match_table = apds9960_acpi_match,
 	},
 	.probe		= apds9960_probe,
 	.remove		= apds9960_remove,
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index a21c827e4953..4093f2353d95 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -22,15 +22,21 @@ enum {
 	CHANNEL_SCAN_INDEX_MAX
 };
 
+#define CHANNEL_SCAN_INDEX_TIMESTAMP CHANNEL_SCAN_INDEX_MAX
+
 struct als_state {
 	struct hid_sensor_hub_callbacks callbacks;
 	struct hid_sensor_common common_attributes;
 	struct hid_sensor_hub_attribute_info als_illum;
-	u32 illum[CHANNEL_SCAN_INDEX_MAX];
+	struct {
+		u32 illum[CHANNEL_SCAN_INDEX_MAX];
+		u64 timestamp __aligned(8);
+	} scan;
 	int scale_pre_decml;
 	int scale_post_decml;
 	int scale_precision;
 	int value_offset;
+	s64 timestamp;
 };
 
 /* Channel definitions */
@@ -54,7 +60,8 @@ static const struct iio_chan_spec als_channels[] = {
 		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 		BIT(IIO_CHAN_INFO_HYSTERESIS),
 		.scan_index = CHANNEL_SCAN_INDEX_ILLUM,
-	}
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
 };
 
 /* Adjust channel real bits based on report descriptor */
@@ -168,14 +175,6 @@ static const struct iio_info als_info = {
 	.write_raw = &als_write_raw,
 };
 
-/* Function to push data to buffer */
-static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
-					int len)
-{
-	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
-	iio_push_to_buffers(indio_dev, data);
-}
-
 /* Callback handler to send event after all samples are received and captured */
 static int als_proc_event(struct hid_sensor_hub_device *hsdev,
 				unsigned usage_id,
@@ -185,10 +184,14 @@ static int als_proc_event(struct hid_sensor_hub_device *hsdev,
 	struct als_state *als_state = iio_priv(indio_dev);
 
 	dev_dbg(&indio_dev->dev, "als_proc_event\n");
-	if (atomic_read(&als_state->common_attributes.data_ready))
-		hid_sensor_push_data(indio_dev,
-				&als_state->illum,
-				sizeof(als_state->illum));
+	if (atomic_read(&als_state->common_attributes.data_ready)) {
+		if (!als_state->timestamp)
+			als_state->timestamp = iio_get_time_ns(indio_dev);
+
+		iio_push_to_buffers_with_timestamp(indio_dev, &als_state->scan,
+						   als_state->timestamp);
+		als_state->timestamp = 0;
+	}
 
 	return 0;
 }
@@ -206,10 +209,14 @@ static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
 
 	switch (usage_id) {
 	case HID_USAGE_SENSOR_LIGHT_ILLUM:
-		als_state->illum[CHANNEL_SCAN_INDEX_INTENSITY] = sample_data;
-		als_state->illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data;
+		als_state->scan.illum[CHANNEL_SCAN_INDEX_INTENSITY] = sample_data;
+		als_state->scan.illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data;
 		ret = 0;
 		break;
+	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+		als_state->timestamp = hid_sensor_convert_timestamp(&als_state->common_attributes,
+								    *(s64 *)raw_data);
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/iio/light/tsl2583.c b/drivers/iio/light/tsl2583.c
index 9e5490b7473b..0f787bfc88fc 100644
--- a/drivers/iio/light/tsl2583.c
+++ b/drivers/iio/light/tsl2583.c
@@ -285,7 +285,7 @@ static int tsl2583_get_lux(struct iio_dev *indio_dev)
 	lux64 = lux64 * chip->als_settings.als_gain_trim;
 	lux64 >>= 13;
 	lux = lux64;
-	lux = (lux + 500) / 1000;
+	lux = DIV_ROUND_CLOSEST(lux, 1000);
 
 	if (lux > TSL2583_LUX_CALC_OVER_FLOW) { /* check for overflow */
 return_max:
@@ -361,12 +361,12 @@ static int tsl2583_set_als_time(struct tsl2583_chip *chip)
 	u8 val;
 
 	/* determine als integration register */
-	als_count = (chip->als_settings.als_time * 100 + 135) / 270;
+	als_count = DIV_ROUND_CLOSEST(chip->als_settings.als_time * 100, 270);
 	if (!als_count)
 		als_count = 1; /* ensure at least one cycle */
 
 	/* convert back to time (encompasses overrides) */
-	als_time = (als_count * 27 + 5) / 10;
+	als_time = DIV_ROUND_CLOSEST(als_count * 27, 10);
 
 	val = 256 - als_count;
 	ret = i2c_smbus_write_byte_data(chip->client,
@@ -380,7 +380,7 @@ static int tsl2583_set_als_time(struct tsl2583_chip *chip)
 
 	/* set chip struct re scaling and saturation */
 	chip->als_saturation = als_count * 922; /* 90% of full scale */
-	chip->als_time_scale = (als_time + 25) / 50;
+	chip->als_time_scale = DIV_ROUND_CLOSEST(als_time, 50);
 
 	return ret;
 }
diff --git a/drivers/iio/light/vl6180.c b/drivers/iio/light/vl6180.c
index 4775bd785e50..d47a4f6f4e87 100644
--- a/drivers/iio/light/vl6180.c
+++ b/drivers/iio/light/vl6180.c
@@ -392,7 +392,7 @@ static int vl6180_set_it(struct vl6180_data *data, int val, int val2)
 {
 	int ret, it_ms;
 
-	it_ms = (val2 + 500) / 1000; /* round to ms */
+	it_ms = DIV_ROUND_CLOSEST(val2, 1000); /* round to ms */
 	if (val != 0 || it_ms < 1 || it_ms > 512)
 		return -EINVAL;