From 5d02edfc3957446fd625c0b018e14c6631a791f4 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Sat, 19 Apr 2014 00:22:00 +0100 Subject: iio: hid-sensors: Convert units and exponent HID sensor hub specify a default unit and alternative units. This along with unit exponent can be used adjust scale. This change change HID sensor data units to IIO defined units for each sensor type. So in this way user space can use a simply use: "(data + offset) * scale" to get final result. Signed-off-by: Srinivas Pandruvada Signed-off-by: Jonathan Cameron --- include/linux/hid-sensor-hub.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/hid-sensor-hub.h') diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h index b70cfd7ff29c..89626b23c246 100644 --- a/include/linux/hid-sensor-hub.h +++ b/include/linux/hid-sensor-hub.h @@ -223,4 +223,8 @@ int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st, int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, u32 report_id, int field_index, u32 usage_id); +int hid_sensor_format_scale(u32 usage_id, + struct hid_sensor_hub_attribute_info *attr_info, + int *val0, int *val1); + #endif -- cgit v1.2.3 From 9030924510a9e7d4b7d218749533840075879f2f Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Sat, 19 Apr 2014 00:22:00 +0100 Subject: iio: hid-sensors: Add api to get poll value Added interface to get poll value in milli-seconds. This value is changed by changing sampling frequency. This API allows clients to wait for at least some poll milli seconds before reading a new sample. Signed-off-by: Srinivas Pandruvada Signed-off-by: Jonathan Cameron --- include/linux/hid-sensor-hub.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/hid-sensor-hub.h') diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h index 89626b23c246..88d8d636a68f 100644 --- a/include/linux/hid-sensor-hub.h +++ b/include/linux/hid-sensor-hub.h @@ -227,4 +227,6 @@ int hid_sensor_format_scale(u32 usage_id, struct hid_sensor_hub_attribute_info *attr_info, int *val0, int *val1); +s32 hid_sensor_read_poll_value(struct hid_sensor_common *st); + #endif -- cgit v1.2.3 From 56ff6be608659ac06d4e3cc5827476efa29d610f Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Sat, 19 Apr 2014 00:22:00 +0100 Subject: iio: hid-sensors: Add API to power on/off Added an API to allow client drivers to turn ON and OFF sensors for quick read. Added data_read as counting varaible instead of boolean, so that sensor is powered off only when last user released it. Signed-off-by: Srinivas Pandruvada Signed-off-by: Jonathan Cameron --- include/linux/hid-sensor-hub.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/hid-sensor-hub.h') diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h index 88d8d636a68f..51f7ccadf923 100644 --- a/include/linux/hid-sensor-hub.h +++ b/include/linux/hid-sensor-hub.h @@ -189,7 +189,7 @@ struct hid_sensor_common { struct hid_sensor_hub_device *hsdev; struct platform_device *pdev; unsigned usage_id; - bool data_ready; + atomic_t data_ready; struct iio_trigger *trigger; struct hid_sensor_hub_attribute_info poll; struct hid_sensor_hub_attribute_info report_state; -- cgit v1.2.3