iio: imu: st_lsm6dsx: enable LIR for sensor events

Enable Latched interrupt by default for sensor events
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Tested-by: Sean Nyekjaer <sean@geanix.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h

@@ -215,6 +215,7 @@ struct st_lsm6dsx_ext_dev_settings {
  * @fs_table: Hw sensors gain table (gain + val).
  * @decimator: List of decimator register info (addr + mask).
  * @batch: List of FIFO batching register info (addr + mask).
+ * @lir: Latched interrupt register info (addr + mask).
  * @fifo_ops: Sensor hw FIFO parameters.
  * @ts_settings: Hw timer related settings.
  * @shub_settings: i2c controller related settings.
@@ -237,6 +238,7 @@ struct st_lsm6dsx_settings {
 	struct st_lsm6dsx_fs_table_entry fs_table[2];
 	struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID];
 	struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID];
+	struct st_lsm6dsx_reg lir;
 	struct st_lsm6dsx_fifo_ops fifo_ops;
 	struct st_lsm6dsx_hw_ts_settings ts_settings;
 	struct st_lsm6dsx_shub_settings shub_settings;

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

@@ -237,6 +237,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = GENMASK(5, 3),
 			},
 		},
+		.lir = {
+			.addr = 0x58,
+			.mask = BIT(0),
+		},
 		.fifo_ops = {
 			.update_fifo = st_lsm6dsx_update_fifo,
 			.read_fifo = st_lsm6dsx_read_fifo,
@@ -349,6 +353,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = GENMASK(5, 3),
 			},
 		},
+		.lir = {
+			.addr = 0x58,
+			.mask = BIT(0),
+		},
 		.fifo_ops = {
 			.update_fifo = st_lsm6dsx_update_fifo,
 			.read_fifo = st_lsm6dsx_read_fifo,
@@ -470,6 +478,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = GENMASK(5, 3),
 			},
 		},
+		.lir = {
+			.addr = 0x58,
+			.mask = BIT(0),
+		},
 		.fifo_ops = {
 			.update_fifo = st_lsm6dsx_update_fifo,
 			.read_fifo = st_lsm6dsx_read_fifo,
@@ -585,6 +597,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = GENMASK(7, 4),
 			},
 		},
+		.lir = {
+			.addr = 0x56,
+			.mask = BIT(0),
+		},
 		.fifo_ops = {
 			.update_fifo = st_lsm6dsx_update_fifo,
 			.read_fifo = st_lsm6dsx_read_tagged_fifo,
@@ -715,6 +731,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = GENMASK(7, 4),
 			},
 		},
+		.lir = {
+			.addr = 0x56,
+			.mask = BIT(0),
+		},
 		.fifo_ops = {
 			.update_fifo = st_lsm6dsx_update_fifo,
 			.read_fifo = st_lsm6dsx_read_tagged_fifo,
@@ -822,6 +842,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 				.mask = GENMASK(7, 4),
 			},
 		},
+		.lir = {
+			.addr = 0x56,
+			.mask = BIT(0),
+		},
 		.fifo_ops = {
 			.update_fifo = st_lsm6dsx_update_fifo,
 			.read_fifo = st_lsm6dsx_read_tagged_fifo,
@@ -1416,6 +1440,17 @@ static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw)
 	if (err < 0)
 		return err;
 
+	/* enable Latched interrupts for device events */
+	if (hw->settings->lir.addr) {
+		unsigned int data;
+
+		data = ST_LSM6DSX_SHIFT_VAL(1, hw->settings->lir.mask);
+		err = regmap_update_bits(hw->regmap, hw->settings->lir.addr,
+					 hw->settings->lir.mask, data);
+		if (err < 0)
+			return err;
+	}
+
 	err = st_lsm6dsx_init_shub(hw);
 	if (err < 0)
 		return err;