[PATCH v2 4/4] iio: imu: inv_icm42600: add support for icm42630
From: Jorijn van der Graaf
Date: Fri Jul 24 2026 - 16:34:26 EST
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. Devicetrees describe
the part with an icm42631 fallback; the dedicated entries bind the
exact part where the kernel knows it.
Tested on the Fairphone 6 via a backport of this change to the
device's 7.1-based kernel (only the id-table style and entry placement
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.
Acked-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@xxxxxxx>
Assisted-by: Claude:claude-fable-5
Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@xxxxxxxxxxxxx>
---
v2: place the match entries in numeric position (the only code
change); kept the Acked-by.
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 f306e3ffca48..da7bc0f1155c 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 e44ed6dcde02..672b19d2e41c 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
@@ -78,6 +78,7 @@ static const struct i2c_device_id inv_icm42600_id[] = {
{ .name = "icm42602", .driver_data = INV_CHIP_ICM42602 },
{ .name = "icm42605", .driver_data = INV_CHIP_ICM42605 },
{ .name = "icm42622", .driver_data = INV_CHIP_ICM42622 },
+ { .name = "icm42630", .driver_data = INV_CHIP_ICM42630 },
{ .name = "icm42631", .driver_data = INV_CHIP_ICM42631 },
{ .name = "icm42686", .driver_data = INV_CHIP_ICM42686 },
{ .name = "icm42688", .driver_data = INV_CHIP_ICM42688 },
@@ -98,6 +99,9 @@ static const struct of_device_id inv_icm42600_of_matches[] = {
}, {
.compatible = "invensense,icm42622",
.data = (void *)INV_CHIP_ICM42622,
+ }, {
+ .compatible = "invensense,icm42630",
+ .data = (void *)INV_CHIP_ICM42630,
}, {
.compatible = "invensense,icm42631",
.data = (void *)INV_CHIP_ICM42631,
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
index 3e2f4eb42e97..3707460d77e1 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
@@ -75,6 +75,7 @@ static const struct spi_device_id inv_icm42600_id[] = {
{ .name = "icm42602", .driver_data = INV_CHIP_ICM42602 },
{ .name = "icm42605", .driver_data = INV_CHIP_ICM42605 },
{ .name = "icm42622", .driver_data = INV_CHIP_ICM42622 },
+ { .name = "icm42630", .driver_data = INV_CHIP_ICM42630 },
{ .name = "icm42631", .driver_data = INV_CHIP_ICM42631 },
{ .name = "icm42686", .driver_data = INV_CHIP_ICM42686 },
{ .name = "icm42688", .driver_data = INV_CHIP_ICM42688 },
@@ -95,6 +96,9 @@ static const struct of_device_id inv_icm42600_of_matches[] = {
}, {
.compatible = "invensense,icm42622",
.data = (void *)INV_CHIP_ICM42622,
+ }, {
+ .compatible = "invensense,icm42630",
+ .data = (void *)INV_CHIP_ICM42630,
}, {
.compatible = "invensense,icm42631",
.data = (void *)INV_CHIP_ICM42631,
--
2.55.0