Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Cristian Marussi <cristian.marussi@arm.com>
To:     linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc:     sudeep.holla@arm.com, lukasz.luba@arm.com,
        james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com,
        egranata@google.com, jbhayana@google.com,
        peter.hilber@opensynergy.com, mikhail.golubev@opensynergy.com,
        Igor.Skalkin@opensynergy.com, cristian.marussi@arm.com
Subject: [PATCH v2 5/6] firmware: arm_scmi: add SCMIv3.0 Sensor configuration support
Date:   Mon, 26 Oct 2020 20:10:06 +0000
Message-Id: <20201026201007.23591-6-cristian.marussi@arm.com>
In-Reply-To: <20201026201007.23591-1-cristian.marussi@arm.com>
References: <20201026201007.23591-1-cristian.marussi@arm.com>
Precedence: bulk

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 bdb0ed0df683..372a3592e99b 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
@@ -755,6 +828,8 @@ 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 24d5b7ebf508..6f39ffa638b7 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -282,7 +282,38 @@ 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;
@@ -406,6 +437,8 @@ 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);
@@ -418,6 +451,10 @@ 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