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authorKweh, Hock Leong <hock.leong.kweh@intel.com>2016-12-15 13:48:21 -0800
committerJonathan Cameron <jic23@kernel.org>2016-12-30 17:06:34 +0000
commit578f8d77089290a7c67989fe48ad9304f8b88e8f (patch)
treec6a22bb20872050e98b9c60f0d46d1a3dd0d27c4 /drivers
parent7f0d874036f07ceb394979f83a6411baed513aa9 (diff)
iio: light: hid-sensor-als: Add duplicate IIO_LIGHT channel
There is one light sensor type defined in the sensor hub specification, which has one Illuminance field. It doesn't distinguish between ambient light sensor or color sensor. Currently it is presented as IIO_INTENSITY channel. There are some user spaces specifically looking for IIO_LIGHT channel. To satisfy such user spaces this change also add a duplicate IIO_LIGHT channel. The units of measurement of Illuminance field is Lux, so it is still compatible to IIO ABI. Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@intel.com> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/iio/light/hid-sensor-als.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index 8bb1f90ecd51..059d964772c7 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -31,13 +31,17 @@
#include <linux/iio/triggered_buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"
-#define CHANNEL_SCAN_INDEX_ILLUM 0
+enum {
+ CHANNEL_SCAN_INDEX_INTENSITY = 0,
+ CHANNEL_SCAN_INDEX_ILLUM = 1,
+ 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;
+ u32 illum[CHANNEL_SCAN_INDEX_MAX];
int scale_pre_decml;
int scale_post_decml;
int scale_precision;
@@ -55,6 +59,15 @@ static const struct iio_chan_spec als_channels[] = {
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_INTENSITY,
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = CHANNEL_SCAN_INDEX_ILLUM,
}
};
@@ -86,6 +99,7 @@ static int als_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case 0:
switch (chan->scan_index) {
+ case CHANNEL_SCAN_INDEX_INTENSITY:
case CHANNEL_SCAN_INDEX_ILLUM:
report_id = als_state->als_illum.report_id;
address =
@@ -202,10 +216,12 @@ static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
struct iio_dev *indio_dev = platform_get_drvdata(priv);
struct als_state *als_state = iio_priv(indio_dev);
int ret = -EINVAL;
+ u32 sample_data = *(u32 *)raw_data;
switch (usage_id) {
case HID_USAGE_SENSOR_LIGHT_ILLUM:
- als_state->illum = *(u32 *)raw_data;
+ als_state->illum[CHANNEL_SCAN_INDEX_INTENSITY] = sample_data;
+ als_state->illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data;
ret = 0;
break;
default:
@@ -230,6 +246,8 @@ static int als_parse_report(struct platform_device *pdev,
&st->als_illum);
if (ret < 0)
return ret;
+ als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_INTENSITY,
+ st->als_illum.size);
als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
st->als_illum.size);