This interface is used to help user to set sampling
frequency to an acceptable range.
Signed-off-by: Song Hongyan <hongyan.song@xxxxxxxxx>
---
.../iio/common/hid-sensors/hid-sensor-attributes.c | 35 ++++++++++++++++++++--
include/linux/hid-sensor-hub.h | 4 ++-
include/linux/hid-sensor-ids.h | 1 +
3 files changed, 37 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
index b5beea53..ad30814 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
@@ -194,6 +194,30 @@ int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
}
EXPORT_SYMBOL(hid_sensor_read_samp_freq_value);
+int hid_sensor_read_max_samp_freq_value(struct hid_sensor_common *st,
+ int *val1, int *val2)
+{
+ s32 value;
+ int ret;
+
+ ret = sensor_hub_get_feature(st->hsdev,
+ st->min_report_inter.report_id,
+ st->min_report_inter.index, sizeof(value),
+ &value);
+ if (ret < 0 || value < 0)
+ return -EINVAL;
+
+ if (st->poll.units == HID_USAGE_SENSOR_UNITS_MILLISECOND)
+ simple_div(1000, value, val1, val2);
+ else if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND)
+ simple_div(1, value, val1, val2);
+ else
+ return -EINVAL;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+EXPORT_SYMBOL(hid_sensor_read_max_samp_freq_value);
+
int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
int val1, int val2)
{
@@ -382,11 +406,18 @@ int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev,
HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS,
&st->sensitivity);
- hid_dbg(hsdev->hdev, "common attributes: %x:%x, %x:%x, %x:%x %x:%x\n",
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_PROP_MIN_REPORT_INTER,
+ &st->min_report_inter);
+
+ hid_dbg(hsdev->hdev, "common attributes: %x:%x, %x:%x, %x:%x %x:%x, %x:%x\n",
st->poll.index, st->poll.report_id,
st->report_state.index, st->report_state.report_id,
st->power_state.index, st->power_state.report_id,
- st->sensitivity.index, st->sensitivity.report_id);
+ st->sensitivity.index, st->sensitivity.report_id,
+ st->min_report_inter.index,
+ st->min_report_inter.report_id);
return 0;
}
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h
index dd85f35..3410777 100644
--- a/include/linux/hid-sensor-hub.h
+++ b/include/linux/hid-sensor-hub.h
@@ -236,6 +236,7 @@ struct hid_sensor_common {
struct hid_sensor_hub_attribute_info report_state;
struct hid_sensor_hub_attribute_info power_state;
struct hid_sensor_hub_attribute_info sensitivity;
+ struct hid_sensor_hub_attribute_info min_report_inter;
struct work_struct work;
};
@@ -261,7 +262,8 @@ int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
int val1, int val2);
int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
int *val1, int *val2);
-
+int hid_sensor_read_max_samp_freq_value(struct hid_sensor_common *st,
+ int *val1, int *val2);
int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
u32 report_id, int field_index, u32 usage_id);
diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
index b6778fd2..3e56e50 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -140,6 +140,7 @@
#define HID_USAGE_SENSOR_PROP_RANGE_MINIMUM 0x200315
#define HID_USAGE_SENSOR_PROP_REPORT_STATE 0x200316
#define HID_USAGE_SENSOR_PROY_POWER_STATE 0x200319
+#define HID_USAGE_SENSOR_PROP_MIN_REPORT_INTER 0x200304
/* Per data field properties */
#define HID_USAGE_SENSOR_DATA_MOD_NONE 0x00
--
1.9.1
--
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