[PATCH 2/2] iio: imu: inv_icm42600: add support for icm42630

[Jorijn van der Graaf]

The TDK InvenSense ICM-42630 is a 6-axis IMU of the ICM-42600 family,
found e.g. in the Fairphone 6. It is register-compatible with its
siblings (the existing driver works on it unmodified) and reports
WHOAMI value 0x0C.

The part appears to be a mobile SKU and has no public datasheet: the
identity comes from the Fairphone 6 platform documentation and
schematics naming the part, and the WHOAMI value was read from the
hardware, whose bank 0 register defaults match the ICM-42600 family
layout.

Add the chip id, WHOAMI value and I2C/SPI match entries, using the
family default configuration like the ICM-42631.

Tested on the Fairphone 6 via a backport of this change to the
device's 7.1-based kernel (only the id-table style adjusted to that
base), on a bit-banged SPI bus with INT1 wired to the SoC: probe,
accelerometer, gyroscope and temperature raw reads, all full-scale
ranges, multiple sampling frequencies, and watermark-paced FIFO reads
through the INT1 interrupt.

Assisted-by: Claude:claude-fable-5
Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@xxxxxxxxxxxxx>
---
 drivers/iio/imu/inv_icm42600/inv_icm42600.h      | 2 ++
 drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 5 +++++
 drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c  | 4 ++++
 drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c  | 4 ++++
 4 files changed, 15 insertions(+)

diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
index b55d993f0264..349de5458581 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
@@ -28,6 +28,7 @@ enum inv_icm42600_chip {
 	INV_CHIP_ICM42622,
 	INV_CHIP_ICM42688,
 	INV_CHIP_ICM42631,
+	INV_CHIP_ICM42630,
 	INV_CHIP_NB,
 };
 
@@ -386,6 +387,7 @@ struct inv_icm42600_sensor_state {
 #define INV_ICM42600_WHOAMI_ICM42622			0x46
 #define INV_ICM42600_WHOAMI_ICM42688			0x47
 #define INV_ICM42600_WHOAMI_ICM42631			0x5C
+#define INV_ICM42600_WHOAMI_ICM42630			0x0C
 
 /* User bank 1 (MSB 0x10) */
 #define INV_ICM42600_REG_SENSOR_CONFIG0			0x1003
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
index dc97d8a274e3..9a31ca3615b3 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
@@ -177,6 +177,11 @@ static const struct inv_icm42600_hw inv_icm42600_hw[INV_CHIP_NB] = {
 		.name = "icm42631",
 		.conf = &inv_icm42600_default_conf,
 	},
+	[INV_CHIP_ICM42630] = {
+		.whoami = INV_ICM42600_WHOAMI_ICM42630,
+		.name = "icm42630",
+		.conf = &inv_icm42600_default_conf,
+	},
 };
 
 const struct iio_mount_matrix *
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
index 28552d2db91d..c413904c8680 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
@@ -81,6 +81,7 @@ static const struct i2c_device_id inv_icm42600_id[] = {
 	{ .name = "icm42622", .driver_data = INV_CHIP_ICM42622 },
 	{ .name = "icm42688", .driver_data = INV_CHIP_ICM42688 },
 	{ .name = "icm42631", .driver_data = INV_CHIP_ICM42631 },
+	{ .name = "icm42630", .driver_data = INV_CHIP_ICM42630 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, inv_icm42600_id);
@@ -107,6 +108,9 @@ static const struct of_device_id inv_icm42600_of_matches[] = {
 	}, {
 		.compatible = "invensense,icm42631",
 		.data = (void *)INV_CHIP_ICM42631,
+	}, {
+		.compatible = "invensense,icm42630",
+		.data = (void *)INV_CHIP_ICM42630,
 	},
 	{ }
 };
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
index faf743bc6444..a1d12ce3bf87 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
@@ -78,6 +78,7 @@ static const struct spi_device_id inv_icm42600_id[] = {
 	{ .name = "icm42622", .driver_data = INV_CHIP_ICM42622 },
 	{ .name = "icm42688", .driver_data = INV_CHIP_ICM42688 },
 	{ .name = "icm42631", .driver_data = INV_CHIP_ICM42631 },
+	{ .name = "icm42630", .driver_data = INV_CHIP_ICM42630 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, inv_icm42600_id);
@@ -104,6 +105,9 @@ static const struct of_device_id inv_icm42600_of_matches[] = {
 	}, {
 		.compatible = "invensense,icm42631",
 		.data = (void *)INV_CHIP_ICM42631,
+	}, {
+		.compatible = "invensense,icm42630",
+		.data = (void *)INV_CHIP_ICM42630,
 	},
 	{ }
 };
-- 
2.55.0