platform/chrome: cros_ec_sensorhub: Add the number of sensors in sensorhub

To better manage resources, store the number of sensors reported by
the EC.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

drivers/platform/chrome/cros_ec_sensorhub.c

@@ -65,6 +65,7 @@ static int cros_ec_sensorhub_register(struct device *dev,
 		return sensor_num;
 	}
 
+	sensorhub->sensor_num = sensor_num;
 	if (sensor_num == 0) {
 		dev_err(dev, "Zero sensors reported.\n");
 		return -EINVAL;
@@ -172,7 +173,8 @@ static int cros_ec_sensorhub_probe(struct platform_device *pdev)
 		 * If the device has sensors but does not claim to
 		 * be a sensor hub, we are in legacy mode.
 		 */
-		for (i = 0; i < 2; i++) {
+		data->sensor_num = 2;
+		for (i = 0; i < data->sensor_num; i++) {
 			ret = cros_ec_sensorhub_allocate_sensor(dev,
 						"cros-ec-accel-legacy", i);
 			if (ret)

include/linux/platform_data/cros_ec_sensorhub.h

@@ -22,9 +22,11 @@ struct cros_ec_sensor_platform {
  * struct cros_ec_sensorhub - Sensor Hub device data.
  *
  * @ec: Embedded Controller where the hub is located.
+ * @sensor_num: Number of MEMS sensors present in the EC.
  */
 struct cros_ec_sensorhub {
 	struct cros_ec_dev *ec;
+	int sensor_num;
 };
 
 #endif   /* __LINUX_PLATFORM_DATA_CROS_EC_SENSORHUB_H */