[PATCH v3 5/6] firmware: arm_scmi: add SCMIv3.0 Sensor configuration support

Cristian Marussi
2020-11-18T16:31:36Z

Add SCMIv3.0 Sensor support for CONFIG_GET/CONFIG_SET commands.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
drivers/firmware/arm_scmi/sensors.c | 75 +++++++++++++++++++++++++++++
include/linux/scmi_protocol.h | 37 ++++++++++++++
2 files changed, 112 insertions(+)

diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c
index 0adc545116a4..fa3385045361 100644
--- a/drivers/firmware/arm_scmi/sensors.c
+++ b/drivers/firmware/arm_scmi/sensors.c
@@ -22,6 +22,8 @@ enum scmi_sensor_protocol_cmd {
SENSOR_READING_GET = 0x6,
SENSOR_AXIS_DESCRIPTION_GET = 0x7,
SENSOR_LIST_UPDATE_INTERVALS = 0x8,
+ SENSOR_CONFIG_GET = 0x9,
+ SENSOR_CONFIG_SET = 0xA,
};

struct scmi_msg_resp_sensor_attributes {
@@ -150,6 +152,19 @@ struct scmi_msg_set_sensor_trip_point {
__le32 value_high;
};

+struct scmi_msg_sensor_config_get {
+ __le32 id;
+};
+
+struct scmi_resp_sensor_config_get {
+ __le32 sensor_config;
+};
+
+struct scmi_msg_sensor_config_set {
+ __le32 id;
+ __le32 sensor_config;
+};
+
struct scmi_msg_sensor_reading_get {
__le32 id;
__le32 flags;
@@ -597,6 +612,64 @@ scmi_sensor_trip_point_config(const struct scmi_handle *handle, u32 sensor_id,
return ret;
}

+static int scmi_sensor_config_get(const struct scmi_handle *handle,
+ u32 sensor_id, u32 *sensor_config)
+{
+ int ret;
+ struct scmi_xfer *t;
+ struct scmi_msg_sensor_config_get *msg;
+ struct scmi_resp_sensor_config_get *resp;
+
+ ret = scmi_xfer_get_init(handle, SENSOR_CONFIG_GET,
+ SCMI_PROTOCOL_SENSOR, sizeof(*msg),
+ sizeof(*resp), &t);
+ if (ret)
+ return ret;
+
+ msg = t->tx.buf;
+ msg->id = cpu_to_le32(sensor_id);
+ ret = scmi_do_xfer(handle, t);
+ if (!ret) {
+ struct sensors_info *si = handle->sensor_priv;
+ struct scmi_sensor_info *s = si->sensors + sensor_id;
+
+ resp = t->rx.buf;
+ *sensor_config = le32_to_cpu(resp->sensor_config);
+ s->sensor_config = *sensor_config;
+ }
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
+static int scmi_sensor_config_set(const struct scmi_handle *handle,
+ u32 sensor_id, u32 sensor_config)
+{
+ int ret;
+ struct scmi_xfer *t;
+ struct scmi_msg_sensor_config_set *msg;
+
+ ret = scmi_xfer_get_init(handle, SENSOR_CONFIG_SET,
+ SCMI_PROTOCOL_SENSOR, sizeof(*msg), 0, &t);
+ if (ret)
+ return ret;
+
+ msg = t->tx.buf;
+ msg->id = cpu_to_le32(sensor_id);
+ msg->sensor_config = cpu_to_le32(sensor_config);
+
+ ret = scmi_do_xfer(handle, t);
+ if (!ret) {
+ struct sensors_info *si = handle->sensor_priv;
+ struct scmi_sensor_info *s = si->sensors + sensor_id;
+
+ s->sensor_config = sensor_config;
+ }
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
/**
* scmi_sensor_reading_get - Read scalar sensor value
* @handle: Platform handle
@@ -754,6 +827,8 @@ static const struct scmi_sensor_ops sensor_ops = {
.trip_point_config = scmi_sensor_trip_point_config,
.reading_get = scmi_sensor_reading_get,
.reading_get_timestamped = scmi_sensor_reading_get_timestamped,
+ .config_get = scmi_sensor_config_get,
+ .config_set = scmi_sensor_config_set,
};

static int scmi_sensor_set_notify_enabled(const struct scmi_handle *handle,
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index 072d8f9fc42a..32d18457b6c6 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -286,7 +286,38 @@ struct scmi_sensor_info {
unsigned int num_axis;
struct scmi_sensor_axis_info *axis;
struct scmi_sensor_intervals_info intervals;
+ unsigned int sensor_config;
+#define SCMI_SENS_CFG_UPDATE_SECS_MASK GENMASK(31, 16)
+#define SCMI_SENS_CFG_GET_UPDATE_SECS(x) \
+ FIELD_GET(SCMI_SENS_CFG_UPDATE_SECS_MASK, (x))
+
+#define SCMI_SENS_CFG_UPDATE_EXP_MASK GENMASK(15, 11)
+#define SCMI_SENS_CFG_GET_UPDATE_EXP(x) \
+ ({ \
+ int __signed_exp = \
+ FIELD_GET(SCMI_SENS_CFG_UPDATE_EXP_MASK, (x)); \
+ \
+ if (__signed_exp & BIT(4)) \
+ __signed_exp |= GENMASK(31, 5); \
+ __signed_exp; \
+ })
+
+#define SCMI_SENS_CFG_ROUND_MASK GENMASK(10, 9)
+#define SCMI_SENS_CFG_ROUND_AUTO 2
+#define SCMI_SENS_CFG_ROUND_UP 1
+#define SCMI_SENS_CFG_ROUND_DOWN 0
+
+#define SCMI_SENS_CFG_TSTAMP_ENABLED_MASK BIT(1)
+#define SCMI_SENS_CFG_TSTAMP_ENABLE 1
+#define SCMI_SENS_CFG_TSTAMP_DISABLE 0
+#define SCMI_SENS_CFG_IS_TSTAMP_ENABLED(x) \
+ FIELD_GET(SCMI_SENS_CFG_TSTAMP_ENABLED_MASK, (x))
+
+#define SCMI_SENS_CFG_SENSOR_ENABLED_MASK BIT(0)
+#define SCMI_SENS_CFG_SENSOR_ENABLE 1
+#define SCMI_SENS_CFG_SENSOR_DISABLE 0
char name[SCMI_MAX_STR_SIZE];
+#define SCMI_SENS_CFG_IS_ENABLED(x) FIELD_GET(BIT(0), (x))
bool extended_scalar_attrs;
unsigned int sensor_power;
unsigned int resolution;
@@ -410,6 +441,8 @@ enum scmi_sensor_class {
* Supports multi-axis sensors for sensors which
* supports it and if the @reading array size of
* @count entry equals the sensor num_axis
+ * @config_get: Get sensor current configuration
+ * @config_set: Set sensor current configuration
*/
struct scmi_sensor_ops {
int (*count_get)(const struct scmi_handle *handle);
@@ -422,6 +455,10 @@ struct scmi_sensor_ops {
int (*reading_get_timestamped)(const struct scmi_handle *handle,
u32 sensor_id, u8 count,
struct scmi_sensor_reading *readings);
+ int (*config_get)(const struct scmi_handle *handle,
+ u32 sensor_id, u32 *sensor_config);
+ int (*config_set)(const struct scmi_handle *handle,
+ u32 sensor_id, u32 sensor_config);
};

/**
--
2.17.1