firmware: arm_scmi: Add SCMI v3.0 sensors timestamped reads

[linux-2.6-microblaze.git] / include / linux / scmi_protocol.h

diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index 0792b0b..0c52bf0 100644 (file)
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -149,6 +149,20 @@ struct scmi_power_ops {
                         u32 *state);
 };
 
+/**
+ * scmi_sensor_reading  - represent a timestamped read
+ *
+ * Used by @reading_get_timestamped method.
+ *
+ * @value: The signed value sensor read.
+ * @timestamp: An unsigned timestamp for the sensor read, as provided by
+ *            SCMI platform. Set to zero when not available.
+ */
+struct scmi_sensor_reading {
+       long long value;
+       unsigned long long timestamp;
+};
+
 /**
  * scmi_range_attrs  - specifies a sensor or axis values' range
  * @min_range: The minimum value which can be represented by the sensor/axis.
@@ -390,6 +404,11 @@ enum scmi_sensor_class {
  * @info_get: get the information of the specified sensor
  * @trip_point_config: selects and configures a trip-point of interest
  * @reading_get: gets the current value of the sensor
+ * @reading_get_timestamped: gets the current value and timestamp, when
+ *                          available, of the sensor. (as of v3.0 spec)
+ *                          Supports multi-axis sensors for sensors which
+ *                          supports it and if the @reading array size of
+ *                          @count entry equals the sensor num_axis
  */
 struct scmi_sensor_ops {
        int (*count_get)(const struct scmi_handle *handle);
@@ -399,6 +418,9 @@ struct scmi_sensor_ops {
                                 u32 sensor_id, u8 trip_id, u64 trip_value);
        int (*reading_get)(const struct scmi_handle *handle, u32 sensor_id,
                           u64 *value);
+       int (*reading_get_timestamped)(const struct scmi_handle *handle,
+                                      u32 sensor_id, u8 count,
+                                      struct scmi_sensor_reading *readings);
 };
 
 /**