* [PATCH V3 1/9] dt-bindings: iio: imu: icm42607: Add devicetree binding
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 2/9] iio: imu: inv_icm42607: Add Core for inv_icm42607 Driver Chris Morgan
` (8 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add devicetree binding for the Invensense ICM42607 and Invensense
ICM42607P inertial measurement unit. This unit is a combined
accelerometer, gyroscope, and thermometer available via I2C or SPI.
This device is functionally very similar to the icm42600 series with a
very different register layout.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
.../bindings/iio/imu/invensense,icm42607.yaml | 95 +++++++++++++++++++
1 file changed, 95 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/imu/invensense,icm42607.yaml
diff --git a/Documentation/devicetree/bindings/iio/imu/invensense,icm42607.yaml b/Documentation/devicetree/bindings/iio/imu/invensense,icm42607.yaml
new file mode 100644
index 000000000000..bbacdee5b906
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/imu/invensense,icm42607.yaml
@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/imu/invensense,icm42607.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: InvenSense ICM-42607 Inertial Measurement Unit
+
+maintainers:
+ - Chris Morgan <macromorgan@hotmail.com>
+
+description: |
+ 6-axis MotionTracking device that combines a 3-axis gyroscope and a 3-axis
+ accelerometer.
+
+properties:
+ compatible:
+ enum:
+ - invensense,icm42607
+ - invensense,icm42607p
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 2
+
+ interrupt-names:
+ minItems: 1
+ maxItems: 2
+ items:
+ enum:
+ - INT1
+ - INT2
+
+ drive-open-drain:
+ type: boolean
+
+ mount-matrix: true
+
+ spi-cpha: true
+ spi-cpol: true
+
+ vdd-supply:
+ description: Regulator that provides power to the sensor
+
+ vddio-supply:
+ description: Regulator that provides power to the bus
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ icm42607p@68 {
+ compatible = "invensense,icm42607p";
+ reg = <0x68>;
+ interrupt-parent = <&gpio2>;
+ interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-names = "INT1";
+ vdd-supply = <&vdd>;
+ vddio-supply = <&vddio>;
+ };
+ };
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ icm42607p@0 {
+ compatible = "invensense,icm42607p";
+ reg = <0>;
+ spi-max-frequency = <24000000>;
+ spi-cpha;
+ spi-cpol;
+ interrupt-parent = <&gpio1>;
+ interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-names = "INT1";
+ vdd-supply = <&vdd>;
+ vddio-supply = <&vddio>;
+ };
+ };
--
2.43.0
_______________________________________________
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 2/9] iio: imu: inv_icm42607: Add Core for inv_icm42607 Driver
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
2026-03-30 19:58 ` [PATCH V3 1/9] dt-bindings: iio: imu: icm42607: Add devicetree binding Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 3/9] iio: imu: inv_icm42607: Add I2C and SPI For icm42607 Chris Morgan
` (7 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add the core component of a new inv_icm42607 driver. This includes
a few setup functions and the full register definition in the
header file.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 424 ++++++++++++++++++
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 300 +++++++++++++
2 files changed, 724 insertions(+)
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607.h
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
new file mode 100644
index 000000000000..609188c40ffc
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -0,0 +1,424 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#ifndef INV_ICM42607_H_
+#define INV_ICM42607_H_
+
+#include <linux/bitops.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/common/inv_sensors_timestamp.h>
+
+enum inv_icm42607_chip {
+ INV_CHIP_INVALID,
+ INV_CHIP_ICM42607P,
+ INV_CHIP_ICM42607,
+ INV_CHIP_NB,
+};
+
+enum inv_icm42607_sensor_mode {
+ INV_ICM42607_SENSOR_MODE_OFF,
+ INV_ICM42607_SENSOR_MODE_STANDBY,
+ INV_ICM42607_SENSOR_MODE_LOW_POWER,
+ INV_ICM42607_SENSOR_MODE_LOW_NOISE,
+ INV_ICM42607_SENSOR_MODE_NB,
+};
+
+/* gyroscope fullscale values */
+enum inv_icm42607_gyro_fs {
+ INV_ICM42607_GYRO_FS_2000DPS,
+ INV_ICM42607_GYRO_FS_1000DPS,
+ INV_ICM42607_GYRO_FS_500DPS,
+ INV_ICM42607_GYRO_FS_250DPS,
+ INV_ICM42607_GYRO_FS_NB,
+};
+
+/* accelerometer fullscale values */
+enum inv_icm42607_accel_fs {
+ INV_ICM42607_ACCEL_FS_16G,
+ INV_ICM42607_ACCEL_FS_8G,
+ INV_ICM42607_ACCEL_FS_4G,
+ INV_ICM42607_ACCEL_FS_2G,
+ INV_ICM42607_ACCEL_FS_NB,
+};
+
+/* ODR values */
+enum inv_icm42607_odr {
+ INV_ICM42607_ODR_1600HZ = 5,
+ INV_ICM42607_ODR_800HZ,
+ INV_ICM42607_ODR_400HZ,
+ INV_ICM42607_ODR_200HZ,
+ INV_ICM42607_ODR_100HZ,
+ INV_ICM42607_ODR_50HZ,
+ INV_ICM42607_ODR_25HZ,
+ INV_ICM42607_ODR_12_5HZ,
+ INV_ICM42607_ODR_6_25HZ_LP,
+ INV_ICM42607_ODR_3_125HZ_LP,
+ INV_ICM42607_ODR_1_5625HZ_LP,
+ INV_ICM42607_ODR_NB,
+};
+
+enum inv_icm42607_filter {
+ /* Low-Noise mode sensor data filter */
+ INV_ICM42607_FILTER_BYPASS,
+ INV_ICM42607_FILTER_BW_180HZ,
+ INV_ICM42607_FILTER_BW_121HZ,
+ INV_ICM42607_FILTER_BW_73HZ,
+ INV_ICM42607_FILTER_BW_53HZ,
+ INV_ICM42607_FILTER_BW_34HZ,
+ INV_ICM42607_FILTER_BW_25HZ,
+ INV_ICM42607_FILTER_BW_16HZ,
+
+ /* Low-Power mode sensor data filter (averaging) */
+ INV_ICM42607_FILTER_AVG_2X = 0,
+ INV_ICM42607_FILTER_AVG_4X,
+ INV_ICM42607_FILTER_AVG_8X,
+ INV_ICM42607_FILTER_AVG_16X,
+ INV_ICM42607_FILTER_AVG_32X,
+ INV_ICM42607_FILTER_AVG_64X,
+};
+
+struct inv_icm42607_sensor_conf {
+ int mode;
+ int fs;
+ int odr;
+ int filter;
+};
+#define INV_ICM42607_SENSOR_CONF_INIT {-1, -1, -1, -1}
+
+struct inv_icm42607_conf {
+ struct inv_icm42607_sensor_conf gyro;
+ struct inv_icm42607_sensor_conf accel;
+ bool temp_en;
+};
+
+struct inv_icm42607_suspended {
+ enum inv_icm42607_sensor_mode gyro;
+ enum inv_icm42607_sensor_mode accel;
+ bool temp;
+};
+
+struct inv_icm42607_apex {
+ unsigned int on;
+ struct {
+ u64 value;
+ bool enable;
+ } wom;
+};
+
+/**
+ * struct inv_icm42607_state - driver state variables
+ * @lock: lock for serializing multiple registers access.
+ * @chip: chip identifier.
+ * @name: chip name.
+ * @map: regmap pointer.
+ * @vddio_supply: I/O voltage regulator for the chip.
+ * @irq: chip irq, required to enable/disable and set wakeup
+ * @orientation: sensor chip orientation relative to main hardware.
+ * @conf: chip sensors configurations.
+ * @suspended: suspended sensors configuration.
+ * @indio_gyro: gyroscope IIO device.
+ * @indio_accel: accelerometer IIO device.
+ * @timestamp: interrupt timestamps.
+ * @apex: APEX (Advanced Pedometer and Event detection) management
+ * @buffer: data transfer buffer aligned for DMA.
+ */
+struct inv_icm42607_state {
+ struct mutex lock;
+ enum inv_icm42607_chip chip;
+ const char *name;
+ struct regmap *map;
+ struct regulator *vddio_supply;
+ int irq;
+ struct iio_mount_matrix orientation;
+ struct inv_icm42607_conf conf;
+ struct inv_icm42607_suspended suspended;
+ struct iio_dev *indio_gyro;
+ struct iio_dev *indio_accel;
+ struct {
+ s64 gyro;
+ s64 accel;
+ } timestamp;
+ struct inv_icm42607_apex apex;
+ u8 buffer[3] __aligned(IIO_DMA_MINALIGN);
+};
+
+/**
+ * struct inv_icm42607_sensor_state - sensor state variables
+ * @scales: table of scales.
+ * @scales_len: length (nb of items) of the scales table.
+ * @power_mode: sensor requested power mode (for common frequencies)
+ * @filter: sensor filter.
+ * @ts: timestamp module states.
+ */
+struct inv_icm42607_sensor_state {
+ const int *scales;
+ size_t scales_len;
+ enum inv_icm42607_sensor_mode power_mode;
+ enum inv_icm42607_filter filter;
+ struct inv_sensors_timestamp ts;
+};
+
+/* Virtual register addresses: @bank on MSB (4 upper bits), @address on LSB */
+
+/* Register Map for User Bank 0 */
+#define INV_ICM42607_REG_DEVICE_CONFIG 0x01
+#define INV_ICM42607_DEVICE_CONFIG_SPI_AP_4WIRE BIT(2)
+#define INV_ICM42607_DEVICE_CONFIG_SPI_MODE BIT(0)
+
+#define INV_ICM42607_REG_SIGNAL_PATH_RESET 0x02
+#define INV_ICM42607_SIGNAL_PATH_RESET_SOFT_RESET BIT(4)
+#define INV_ICM42607_SIGNAL_PATH_RESET_FIFO_FLUSH BIT(2)
+
+#define INV_ICM42607_REG_DRIVE_CONFIG1 0x03
+#define INV_ICM42607_DRIVE_CONFIG1_I3C_DDR_MASK GENMASK(5, 3)
+#define INV_ICM42607_DRIVE_CONFIG1_I3C_DDR(_rate) \
+ FIELD_PREP(INV_ICM42607_DRIVE_CONFIG1_I3C_DDR_MASK, (_rate))
+#define INV_ICM42607_DRIVE_CONFIG1_I3C_SDR_MASK GENMASK(2, 0)
+#define INV_ICM42607_DRIVE_CONFIG1_I3C_SDR(_rate) \
+ FIELD_PREP(INV_ICM42607_DRIVE_CONFIG1_I3C_SDR_MASK, (_rate))
+
+#define INV_ICM42607_REG_DRIVE_CONFIG2 0x04
+#define INV_ICM42607_DRIVE_CONFIG2_I2C_MASK GENMASK(5, 3)
+#define INV_ICM42607_DRIVE_CONFIG2_I2C(_rate) \
+ FIELD_PREP(INV_ICM42607_DRIVE_CONFIG2_I2C_MASK, (_rate))
+#define INV_ICM42607_DRIVE_CONFIG2_ALL_MASK GENMASK(2, 0)
+#define INV_ICM42607_DRIVE_CONFIG2_ALL(_rate) \
+ FIELD_PREP(INV_ICM42607_DRIVE_CONFIG2_ALL_MASK, (_rate))
+
+#define INV_ICM42607_REG_DRIVE_CONFIG3 0x05
+#define INV_ICM42607_DRIVE_CONFIG3_SPI_MASK GENMASK(2, 0)
+#define INV_ICM42607_DRIVE_CONFIG3_SPI(_rate) \
+ FIELD_PREP(INV_ICM42607_DRIVE_CONFIG3_SPI_MASK, (_rate))
+
+#define INV_ICM42607_REG_INT_CONFIG 0x06
+#define INV_ICM42607_INT_CONFIG_INT2_LATCHED BIT(5)
+#define INV_ICM42607_INT_CONFIG_INT2_PUSH_PULL BIT(4)
+#define INV_ICM42607_INT_CONFIG_INT2_ACTIVE_HIGH BIT(3)
+#define INV_ICM42607_INT_CONFIG_INT2_ACTIVE_LOW 0x00
+#define INV_ICM42607_INT_CONFIG_INT1_LATCHED BIT(2)
+#define INV_ICM42607_INT_CONFIG_INT1_PUSH_PULL BIT(1)
+#define INV_ICM42607_INT_CONFIG_INT1_ACTIVE_HIGH BIT(0)
+#define INV_ICM42607_INT_CONFIG_INT1_ACTIVE_LOW 0x00
+
+/* all sensor data are 16 bits (2 registers wide) in big-endian */
+#define INV_ICM42607_REG_TEMP_DATA1 0x09
+#define INV_ICM42607_REG_TEMP_DATA0 0x0A
+#define INV_ICM42607_REG_ACCEL_DATA_X1 0x0B
+#define INV_ICM42607_REG_ACCEL_DATA_X0 0x0C
+#define INV_ICM42607_REG_ACCEL_DATA_Y1 0x0D
+#define INV_ICM42607_REG_ACCEL_DATA_Y0 0x0E
+#define INV_ICM42607_REG_ACCEL_DATA_Z1 0x0F
+#define INV_ICM42607_REG_ACCEL_DATA_Z0 0x10
+#define INV_ICM42607_REG_GYRO_DATA_X1 0x11
+#define INV_ICM42607_REG_GYRO_DATA_X0 0x12
+#define INV_ICM42607_REG_GYRO_DATA_Y1 0x13
+#define INV_ICM42607_REG_GYRO_DATA_Y0 0x14
+#define INV_ICM42607_REG_GYRO_DATA_Z1 0x15
+#define INV_ICM42607_REG_GYRO_DATA_Z0 0x16
+#define INV_ICM42607_DATA_INVALID -32768
+
+#define INV_ICM42607_REG_TMST_FSYNCH 0x17
+#define INV_ICM42607_REG_TMST_FSYNCL 0x18
+
+/* APEX Data Registers */
+#define INV_ICM42607_REG_APEX_DATA0 0x31
+#define INV_ICM42607_REG_APEX_DATA1 0x32
+#define INV_ICM42607_REG_APEX_DATA2 0x33
+#define INV_ICM42607_REG_APEX_DATA3 0x34
+#define INV_ICM42607_REG_APEX_DATA4 0x1D
+#define INV_ICM42607_REG_APEX_DATA5 0x1E
+
+#define INV_ICM42607_REG_PWR_MGMT0 0x1F
+#define INV_ICM42607_PWR_MGMT0_ACCEL_LP_CLK_SEL BIT(7)
+#define INV_ICM42607_PWR_MGMT0_IDLE BIT(4)
+#define INV_ICM42607_PWR_MGMT0_GYRO_MODE_MASK GENMASK(3, 2)
+#define INV_ICM42607_PWR_MGMT0_GYRO(_mode) \
+ FIELD_PREP(INV_ICM42607_PWR_MGMT0_GYRO_MODE_MASK, (_mode))
+#define INV_ICM42607_PWR_MGMT0_ACCEL_MODE_MASK GENMASK(1, 0)
+#define INV_ICM42607_PWR_MGMT0_ACCEL(_mode) \
+ FIELD_PREP(INV_ICM42607_PWR_MGMT0_ACCEL_MODE_MASK, (_mode))
+
+#define INV_ICM42607_REG_GYRO_CONFIG0 0x20
+#define INV_ICM42607_GYRO_CONFIG0_FS_SEL_MASK GENMASK(6, 5)
+#define INV_ICM42607_GYRO_CONFIG0_FS_SEL(_fs) \
+ FIELD_PREP(INV_ICM42607_GYRO_CONFIG0_FS_SEL_MASK, (_fs))
+#define INV_ICM42607_GYRO_CONFIG0_ODR_MASK GENMASK(3, 0)
+#define INV_ICM42607_GYRO_CONFIG0_ODR(_odr) \
+ FIELD_PREP(INV_ICM42607_GYRO_CONFIG0_ODR_MASK, (_odr))
+
+#define INV_ICM42607_REG_ACCEL_CONFIG0 0x21
+#define INV_ICM42607_ACCEL_CONFIG0_FS_SEL_MASK GENMASK(6, 5)
+#define INV_ICM42607_ACCEL_CONFIG0_FS_SEL(_fs) \
+ FIELD_PREP(INV_ICM42607_ACCEL_CONFIG0_FS_SEL_MASK, (_fs))
+#define INV_ICM42607_ACCEL_CONFIG0_ODR_MASK GENMASK(3, 0)
+#define INV_ICM42607_ACCEL_CONFIG0_ODR(_odr) \
+ FIELD_PREP(INV_ICM42607_ACCEL_CONFIG0_ODR_MASK, (_odr))
+
+#define INV_ICM42607_REG_TEMP_CONFIG0 0x22
+#define INV_ICM42607_TEMP_CONFIG0_FILTER_MASK GENMASK(6, 4)
+#define INV_ICM42607_TEMP_CONFIG0_FILTER(_filter) \
+ FIELD_PREP(INV_ICM42607_TEMP_CONFIG0_FILTER_MASK, (_filter))
+
+#define INV_ICM42607_REG_GYRO_CONFIG1 0x23
+#define INV_ICM42607_GYRO_CONFIG1_FILTER_MASK GENMASK(2, 0)
+#define INV_ICM42607_GYRO_CONFIG1_FILTER(_filter) \
+ FIELD_PREP(INV_ICM42607_GYRO_CONFIG1_FILTER_MASK, (_filter))
+
+#define INV_ICM42607_REG_ACCEL_CONFIG1 0x24
+#define INV_ICM42607_ACCEL_CONFIG1_AVG_MASK GENMASK(6, 4)
+#define INV_ICM42607_ACCEL_CONFIG1_AVG(_avg) \
+ FIELD_PREP(INV_ICM42607_ACCEL_CONFIG1_AVG_MASK, (_avg))
+#define INV_ICM42607_ACCEL_CONFIG1_FILTER_MASK GENMASK(2, 0)
+#define INV_ICM42607_ACCEL_CONFIG1_FILTER(_filter) \
+ FIELD_PREP(INV_ICM42607_ACCEL_CONFIG1_FILTER_MASK, (_filter))
+
+#define INV_ICM42607_REG_APEX_CONFIG0 0x25
+#define INV_ICM42607_APEX_CONFIG0_DMP_POWER_SAVE_EN BIT(3)
+#define INV_ICM42607_APEX_CONFIG0_DMP_INIT_EN BIT(2)
+#define INV_ICM42607_APEX_CONFIG0_DMP_MEM_RESET_EN BIT(0)
+
+#define INV_ICM42607_REG_APEX_CONFIG1 0x26
+#define INV_ICM42607_APEX_CONFIG1_SMD_ENABLE BIT(6)
+#define INV_ICM42607_APEX_CONFIG1_FF_ENABLE BIT(5)
+#define INV_ICM42607_APEX_CONFIG1_TILT_ENABLE BIT(4)
+#define INV_ICM42607_APEX_CONFIG1_PED_ENABLE BIT(3)
+#define INV_ICM42607_APEX_CONFIG1_DMP_ODR_MASK GENMASK(1, 0)
+#define INV_ICM42607_APEX_CONFIG1_DMP_ODR(_odr) \
+ FIELD_PREP(INV_ICM42607_APEX_CONFIG1_DMP_ODR_MASK, (_odr))
+
+#define INV_ICM42607_REG_WOM_CONFIG 0x27
+#define INV_ICM42607_WOM_CONFIG_INT_DUR_MASK GENMASK(4, 3)
+#define INV_ICM42607_WOM_CONFIG_INT_DUR(_dur) \
+ FIELD_PREP(INV_ICM42607_WOM_CONFIG_INT_DUR_MASK, (_dur))
+#define INV_ICM42607_WOM_CONFIG_INT_MODE BIT(2)
+#define INV_ICM42607_WOM_CONFIG_MODE BIT(1)
+#define INV_ICM42607_WOM_CONFIG_EN BIT(0)
+
+#define INV_ICM42607_REG_FIFO_CONFIG1 0x28
+#define INV_ICM42607_FIFO_CONFIG1_MODE BIT(1)
+#define INV_ICM42607_FIFO_CONFIG1_BYPASS BIT(0)
+
+#define INV_ICM42607_REG_FIFO_CONFIG2 0x29
+#define INV_ICM42607_REG_FIFO_CONFIG3 0x2A
+#define INV_ICM42607_FIFO_WATERMARK_VAL(_wm) \
+ cpu_to_le16((_wm) & GENMASK(11, 0))
+/* FIFO is 2048 bytes, let 12 samples for reading latency */
+#define INV_ICM42607_FIFO_WATERMARK_MAX (2048 - 12 * 16)
+
+#define INV_ICM42607_REG_INT_SOURCE0 0x2B
+#define INV_ICM42607_INT_SOURCE0_ST_INT1_EN BIT(7)
+#define INV_ICM42607_INT_SOURCE0_FSYNC_INT1_EN BIT(6)
+#define INV_ICM42607_INT_SOURCE0_PLL_RDY_INT1_EN BIT(5)
+#define INV_ICM42607_INT_SOURCE0_RESET_DONE_INT1_EN BIT(4)
+#define INV_ICM42607_INT_SOURCE0_DRDY_INT1_EN BIT(3)
+#define INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN BIT(2)
+#define INV_ICM42607_INT_SOURCE0_FIFO_FULL_INT1_EN BIT(1)
+#define INV_ICM42607_INT_SOURCE0_AGC_RDY_INT1_EN BIT(0)
+
+#define INV_ICM42607_REG_INT_SOURCE1 0x2C
+#define INV_ICM42607_INT_SOURCE1_I3C_ERROR_INT1_EN BIT(6)
+#define INV_ICM42607_INT_SOURCE1_SMD_INT1_EN BIT(3)
+#define INV_ICM42607_INT_SOURCE1_WOM_INT1_EN GENMASK(2, 0)
+
+#define INV_ICM42607_REG_INT_SOURCE3 0x2D
+#define INV_ICM42607_INT_SOURCE3_ST_INT2_EN BIT(7)
+#define INV_ICM42607_INT_SOURCE3_FSYNC_INT2_EN BIT(6)
+#define INV_ICM42607_INT_SOURCE3_PLL_RDY_INT2_EN BIT(5)
+#define INV_ICM42607_INT_SOURCE3_RESET_DONE_INT2_EN BIT(4)
+#define INV_ICM42607_INT_SOURCE3_DRDY_INT2_EN BIT(3)
+#define INV_ICM42607_INT_SOURCE3_FIFO_THS_INT2_EN BIT(2)
+#define INV_ICM42607_INT_SOURCE3_FIFO_FULL_INT2_EN BIT(1)
+#define INV_ICM42607_INT_SOURCE3_AGC_RDY_INT2_EN BIT(0)
+
+#define INV_ICM42607_REG_INT_SOURCE4 0x2E
+#define INV_ICM42607_INT_SOURCE4_I3C_ERROR_INT2_EN BIT(6)
+#define INV_ICM42607_INT_SOURCE4_SMD_INT2_EN BIT(3)
+#define INV_ICM42607_INT_SOURCE4_WOM_Z_INT2_EN BIT(2)
+#define INV_ICM42607_INT_SOURCE4_WOM_Y_INT2_EN BIT(1)
+#define INV_ICM42607_INT_SOURCE4_WOM_X_INT2_EN BIT(0)
+
+#define INV_ICM42607_REG_FIFO_LOST_PKT0 0x2F
+#define INV_ICM42607_REG_FIFO_LOST_PKT1 0x30
+
+#define INV_ICM42607_REG_INTF_CONFIG0 0x35
+#define INV_ICM42607_INTF_CONFIG0_FIFO_COUNT_FORMAT BIT(6)
+#define INV_ICM42607_INTF_CONFIG0_FIFO_COUNT_ENDIAN BIT(5)
+#define INV_ICM42607_INTF_CONFIG0_SENSOR_DATA_ENDIAN BIT(4)
+#define INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_MASK GENMASK(1, 0)
+#define INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS \
+ FIELD_PREP(INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_MASK, 2)
+#define INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS \
+ FIELD_PREP(INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_MASK, 3)
+
+#define INV_ICM42607_REG_INTF_CONFIG1 0x36
+#define INV_ICM42607_INTF_CONFIG1_I3C_SDR_EN BIT(3)
+#define INV_ICM42607_INTF_CONFIG1_I3C_DDR_EN BIT(2)
+#define INV_ICM42607_INTF_CONFIG1_CLKSEL_MASK GENMASK(1, 0)
+#define INV_ICM42607_INTF_CONFIG1_CLKSEL_PLL \
+ FIELD_PREP(INV_ICM42607_INTF_CONFIG1_CLKSEL_MASK, 1)
+
+#define INV_ICM42607_REG_INT_STATUS_DRDY 0x39
+#define INV_ICM42607_INT_STATUS_DRDY_DATA_RDY BIT(0)
+
+#define INV_ICM42607_REG_INT_STATUS 0x3A
+#define INV_ICM42607_INT_STATUS_ST BIT(7)
+#define INV_ICM42607_INT_STATUS_FSYNC BIT(6)
+#define INV_ICM42607_INT_STATUS_PLL_RDY BIT(5)
+#define INV_ICM42607_INT_STATUS_RESET_DONE BIT(4)
+#define INV_ICM42607_INT_STATUS_FIFO_THS BIT(2)
+#define INV_ICM42607_INT_STATUS_FIFO_FULL BIT(1)
+#define INV_ICM42607_INT_STATUS_AGC_RDY BIT(0)
+
+#define INV_ICM42607_REG_INT_STATUS2 0x3B
+#define INV_ICM42607_INT_STATUS2_SMD BIT(3)
+#define INV_ICM42607_INT_STATUS2_WOM_INT GENMASK(2, 0)
+
+#define INV_ICM42607_REG_INT_STATUS3 0x3C
+#define INV_ICM42607_INT_STATUS3_STEP_DET BIT(5)
+#define INV_ICM42607_INT_STATUS3_STEP_CNT_OVF BIT(4)
+#define INV_ICM42607_INT_STATUS3_TILT_DET BIT(3)
+#define INV_ICM42607_INT_STATUS3_FF_DET BIT(2)
+
+/*
+ * FIFO access registers
+ * FIFO count is 16 bits (2 registers) big-endian
+ * FIFO data is a continuous read register to read FIFO content
+ */
+#define INV_ICM42607_REG_FIFO_COUNTH 0x3D
+#define INV_ICM42607_REG_FIFO_COUNTL 0x3E
+#define INV_ICM42607_REG_FIFO_DATA 0x3F
+
+#define INV_ICM42607_REG_ACCEL_WOM_X_THR 0x4b
+#define INV_ICM42607_REG_ACCEL_WOM_Y_THR 0x4c
+#define INV_ICM42607_REG_ACCEL_WOM_Z_THR 0x4d
+
+#define INV_ICM42607_REG_WHOAMI 0x75
+#define INV_ICM42607P_WHOAMI 0x60
+#define INV_ICM42607_WHOAMI 0x67
+
+/* Sleep times required by the driver */
+#define INV_ICM42607_POWER_UP_TIME_MS 100
+#define INV_ICM42607_RESET_TIME_MS 1
+#define INV_ICM42607_ACCEL_STARTUP_TIME_MS 20
+#define INV_ICM42607_GYRO_STARTUP_TIME_MS 60
+#define INV_ICM42607_GYRO_STOP_TIME_MS 150
+#define INV_ICM42607_TEMP_STARTUP_TIME_MS 14
+#define INV_ICM42607_SUSPEND_DELAY_MS 2000
+
+typedef int (*inv_icm42607_bus_setup)(struct inv_icm42607_state *);
+
+u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr);
+
+int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
+ unsigned int writeval, unsigned int *readval);
+
+int inv_icm42607_core_probe(struct regmap *regmap, int chip,
+ inv_icm42607_bus_setup bus_setup);
+
+#endif
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
new file mode 100644
index 000000000000..6b7078387568
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -0,0 +1,300 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/regulator/consumer.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+
+#include "inv_icm42607.h"
+
+struct inv_icm42607_hw {
+ uint8_t whoami;
+ const char *name;
+ const struct inv_icm42607_conf *conf;
+};
+
+/* chip initial default configuration */
+static const struct inv_icm42607_conf inv_icm42607_default_conf = {
+ .gyro = {
+ .mode = INV_ICM42607_SENSOR_MODE_OFF,
+ .fs = INV_ICM42607_GYRO_FS_1000DPS,
+ .odr = INV_ICM42607_ODR_100HZ,
+ .filter = INV_ICM42607_FILTER_BW_25HZ,
+ },
+ .accel = {
+ .mode = INV_ICM42607_SENSOR_MODE_OFF,
+ .fs = INV_ICM42607_ACCEL_FS_4G,
+ .odr = INV_ICM42607_ODR_100HZ,
+ .filter = INV_ICM42607_FILTER_BW_25HZ,
+ },
+ .temp_en = false,
+};
+
+static const struct inv_icm42607_hw inv_icm42607_hw[INV_CHIP_NB] = {
+ [INV_CHIP_ICM42607] = {
+ .whoami = INV_ICM42607_WHOAMI,
+ .name = "icm42607",
+ .conf = &inv_icm42607_default_conf,
+ },
+ [INV_CHIP_ICM42607P] = {
+ .whoami = INV_ICM42607P_WHOAMI,
+ .name = "icm42607p",
+ .conf = &inv_icm42607_default_conf,
+ },
+};
+
+u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr)
+{
+ static u32 odr_periods[INV_ICM42607_ODR_NB] = {
+ /* Reserved values */
+ 0, 0, 0, 0, 0,
+ /* 1600Hz */
+ 625000,
+ /* 800Hz */
+ 1250000,
+ /* 400Hz */
+ 2500000,
+ /* 200Hz */
+ 5000000,
+ /* 100 Hz */
+ 10000000,
+ /* 50Hz */
+ 20000000,
+ /* 25Hz */
+ 40000000,
+ /* 12.5Hz */
+ 80000000,
+ /* 6.25Hz */
+ 160000000,
+ /* 3.125Hz */
+ 320000000,
+ /* 1.5625Hz */
+ 640000000,
+ };
+
+ return odr_periods[odr];
+}
+
+int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
+ unsigned int writeval, unsigned int *readval)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+
+ guard(mutex)(&st->lock);
+
+ if (readval)
+ return regmap_read(st->map, reg, readval);
+
+ return regmap_write(st->map, reg, writeval);
+}
+
+static int inv_icm42607_set_conf(struct inv_icm42607_state *st,
+ const struct inv_icm42607_conf *conf)
+{
+ unsigned int val;
+ int ret;
+
+ val = INV_ICM42607_PWR_MGMT0_GYRO(conf->gyro.mode) |
+ INV_ICM42607_PWR_MGMT0_ACCEL(conf->accel.mode);
+ /*
+ * No temperature enable reg in datasheet, but BSP driver
+ * selected RC oscillator clock in LP mode when temperature
+ * was disabled.
+ */
+ if (!conf->temp_en)
+ val |= INV_ICM42607_PWR_MGMT0_ACCEL_LP_CLK_SEL;
+ ret = regmap_write(st->map, INV_ICM42607_REG_PWR_MGMT0, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42607_GYRO_CONFIG0_FS_SEL(conf->gyro.fs) |
+ INV_ICM42607_GYRO_CONFIG0_ODR(conf->gyro.odr);
+ ret = regmap_write(st->map, INV_ICM42607_REG_GYRO_CONFIG0, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42607_ACCEL_CONFIG0_FS_SEL(conf->accel.fs) |
+ INV_ICM42607_ACCEL_CONFIG0_ODR(conf->accel.odr);
+ ret = regmap_write(st->map, INV_ICM42607_REG_ACCEL_CONFIG0, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42607_GYRO_CONFIG1_FILTER(conf->gyro.filter);
+ ret = regmap_write(st->map, INV_ICM42607_REG_GYRO_CONFIG1, val);
+ if (ret)
+ return ret;
+
+ val = INV_ICM42607_ACCEL_CONFIG1_FILTER(conf->accel.filter);
+ ret = regmap_write(st->map, INV_ICM42607_REG_ACCEL_CONFIG1, val);
+ if (ret)
+ return ret;
+
+ st->conf = *conf;
+
+ return 0;
+}
+
+/**
+ * inv_icm42607_setup() - check and setup chip
+ * @st: driver internal state
+ * @bus_setup: callback for setting up bus specific registers
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ */
+static int inv_icm42607_setup(struct inv_icm42607_state *st,
+ inv_icm42607_bus_setup bus_setup)
+{
+ const struct inv_icm42607_hw *hw = &inv_icm42607_hw[st->chip];
+ const struct device *dev = regmap_get_device(st->map);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(st->map, INV_ICM42607_REG_WHOAMI, &val);
+ if (ret)
+ return ret;
+
+ if (val != hw->whoami)
+ dev_warn_probe(dev, -ENODEV,
+ "invalid whoami %#02x expected %#02x (%s)\n",
+ val, hw->whoami, hw->name);
+
+ st->name = hw->name;
+
+ ret = regmap_write(st->map, INV_ICM42607_REG_SIGNAL_PATH_RESET,
+ INV_ICM42607_SIGNAL_PATH_RESET_SOFT_RESET);
+ if (ret)
+ return ret;
+ msleep(INV_ICM42607_RESET_TIME_MS);
+
+ ret = regmap_read(st->map, INV_ICM42607_REG_INT_STATUS, &val);
+ if (ret)
+ return ret;
+ if (!(val & INV_ICM42607_INT_STATUS_RESET_DONE))
+ return dev_err_probe(dev, -ENODEV,
+ "reset error, reset done bit not set\n");
+
+ ret = bus_setup(st);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG0,
+ INV_ICM42607_INTF_CONFIG0_SENSOR_DATA_ENDIAN,
+ INV_ICM42607_INTF_CONFIG0_SENSOR_DATA_ENDIAN);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG1,
+ INV_ICM42607_INTF_CONFIG1_CLKSEL_MASK,
+ INV_ICM42607_INTF_CONFIG1_CLKSEL_PLL);
+ if (ret)
+ return ret;
+
+ return inv_icm42607_set_conf(st, hw->conf);
+}
+
+static int inv_icm42607_enable_vddio_reg(struct inv_icm42607_state *st)
+{
+ int ret;
+
+ ret = regulator_enable(st->vddio_supply);
+ if (ret)
+ return ret;
+
+ usleep_range(3000, 4000);
+
+ return 0;
+}
+
+static void inv_icm42607_disable_vddio_reg(void *_data)
+{
+ struct inv_icm42607_state *st = _data;
+
+ regulator_disable(st->vddio_supply);
+}
+
+int inv_icm42607_core_probe(struct regmap *regmap, int chip,
+ inv_icm42607_bus_setup bus_setup)
+{
+ struct device *dev = regmap_get_device(regmap);
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
+ struct inv_icm42607_state *st;
+ int irq, irq_type;
+ bool open_drain;
+ int ret;
+
+ if (chip < INV_CHIP_INVALID || chip >= INV_CHIP_NB)
+ dev_warn_probe(dev, -ENODEV,
+ "Invalid chip = %d\n", chip);
+
+ /* get INT1 only supported interrupt or fallback to first interrupt */
+ irq = fwnode_irq_get_byname(fwnode, "INT1");
+ if (irq < 0 && irq != -EPROBE_DEFER) {
+ dev_info(dev, "no INT1 interrupt defined, fallback to first interrupt\n");
+ irq = fwnode_irq_get(fwnode, 0);
+ }
+ if (irq < 0)
+ return dev_err_probe(dev, irq, "error missing INT1 interrupt\n");
+
+ irq_type = irq_get_trigger_type(irq);
+ if (!irq_type)
+ irq_type = IRQF_TRIGGER_FALLING;
+
+ open_drain = device_property_read_bool(dev, "drive-open-drain");
+
+ st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, st);
+ mutex_init(&st->lock);
+ st->chip = chip;
+ st->map = regmap;
+ st->irq = irq;
+
+ ret = iio_read_mount_matrix(dev, &st->orientation);
+ if (ret) {
+ dev_err(dev, "failed to retrieve mounting matrix %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_regulator_get_enable(dev, "vdd");
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to get vdd regulator\n");
+
+ msleep(INV_ICM42607_POWER_UP_TIME_MS);
+
+ st->vddio_supply = devm_regulator_get(dev, "vddio");
+ if (IS_ERR(st->vddio_supply))
+ return PTR_ERR(st->vddio_supply);
+
+ ret = inv_icm42607_enable_vddio_reg(st);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, inv_icm42607_disable_vddio_reg, st);
+ if (ret)
+ return ret;
+
+ /* Setup chip registers (includes WHOAMI check, reset check, bus setup) */
+ ret = inv_icm42607_setup(st, bus_setup);
+
+ return ret;
+}
+EXPORT_SYMBOL_NS_GPL(inv_icm42607_core_probe, "IIO_ICM42607");
+
+MODULE_AUTHOR("InvenSense, Inc.");
+MODULE_DESCRIPTION("InvenSense ICM-42607x device driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_INV_SENSORS_TIMESTAMP");
--
2.43.0
_______________________________________________
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 3/9] iio: imu: inv_icm42607: Add I2C and SPI For icm42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
2026-03-30 19:58 ` [PATCH V3 1/9] dt-bindings: iio: imu: icm42607: Add devicetree binding Chris Morgan
2026-03-30 19:58 ` [PATCH V3 2/9] iio: imu: inv_icm42607: Add Core for inv_icm42607 Driver Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 4/9] iio: imu: inv_icm42607: Add Buffer support functions to icm42607 Chris Morgan
` (6 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add I2C and SPI driver support for InvenSense ICM-42607 devices.
Include runtime power management on each device.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 14 ++
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 204 ++++++++++++++++++
.../iio/imu/inv_icm42607/inv_icm42607_i2c.c | 93 ++++++++
.../iio/imu/inv_icm42607/inv_icm42607_spi.c | 100 +++++++++
4 files changed, 411 insertions(+)
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_i2c.c
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_spi.c
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
index 609188c40ffc..7d13091aa8df 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -11,6 +11,7 @@
#include <linux/regmap.h>
#include <linux/mutex.h>
#include <linux/regulator/consumer.h>
+#include <linux/pm.h>
#include <linux/iio/iio.h>
#include <linux/iio/common/inv_sensors_timestamp.h>
@@ -21,6 +22,16 @@ enum inv_icm42607_chip {
INV_CHIP_NB,
};
+/* serial bus slew rates */
+enum inv_icm42607_slew_rate {
+ INV_ICM42607_SLEW_RATE_20_60NS,
+ INV_ICM42607_SLEW_RATE_12_36NS,
+ INV_ICM42607_SLEW_RATE_6_18NS,
+ INV_ICM42607_SLEW_RATE_4_12NS,
+ INV_ICM42607_SLEW_RATE_2_6NS,
+ INV_ICM42607_SLEW_RATE_INF_2NS,
+};
+
enum inv_icm42607_sensor_mode {
INV_ICM42607_SENSOR_MODE_OFF,
INV_ICM42607_SENSOR_MODE_STANDBY,
@@ -413,6 +424,9 @@ struct inv_icm42607_sensor_state {
typedef int (*inv_icm42607_bus_setup)(struct inv_icm42607_state *);
+extern const struct regmap_config inv_icm42607_regmap_config;
+extern const struct dev_pm_ops inv_icm42607_pm_ops;
+
u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr);
int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
index 6b7078387568..da04c820dab2 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -12,12 +12,33 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include "inv_icm42607.h"
+static const struct regmap_range_cfg inv_icm42607_regmap_ranges[] = {
+ {
+ .name = "user bank",
+ .range_min = 0x0000,
+ .range_max = 0x00FF,
+ .window_start = 0,
+ .window_len = 0x0100,
+ },
+};
+
+const struct regmap_config inv_icm42607_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x00FF,
+ .ranges = inv_icm42607_regmap_ranges,
+ .num_ranges = ARRAY_SIZE(inv_icm42607_regmap_ranges),
+ .cache_type = REGCACHE_NONE,
+};
+EXPORT_SYMBOL_NS_GPL(inv_icm42607_regmap_config, "IIO_ICM42607");
+
struct inv_icm42607_hw {
uint8_t whoami;
const char *name;
@@ -86,6 +107,62 @@ u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr)
return odr_periods[odr];
}
+static int inv_icm42607_set_pwr_mgmt0(struct inv_icm42607_state *st,
+ enum inv_icm42607_sensor_mode gyro,
+ enum inv_icm42607_sensor_mode accel,
+ bool temp, unsigned int *sleep_ms)
+{
+ enum inv_icm42607_sensor_mode oldgyro = st->conf.gyro.mode;
+ enum inv_icm42607_sensor_mode oldaccel = st->conf.accel.mode;
+ bool oldtemp = st->conf.temp_en;
+ unsigned int sleepval;
+ unsigned int val;
+ int ret;
+
+ if (gyro == oldgyro && accel == oldaccel && temp == oldtemp)
+ return 0;
+
+ val = INV_ICM42607_PWR_MGMT0_GYRO(gyro) |
+ INV_ICM42607_PWR_MGMT0_ACCEL(accel);
+ if (!temp)
+ val |= INV_ICM42607_PWR_MGMT0_ACCEL_LP_CLK_SEL;
+ ret = regmap_write(st->map, INV_ICM42607_REG_PWR_MGMT0, val);
+ if (ret)
+ return ret;
+
+ st->conf.gyro.mode = gyro;
+ st->conf.accel.mode = accel;
+ st->conf.temp_en = temp;
+
+ sleepval = 0;
+ if (temp && !oldtemp) {
+ if (sleepval < INV_ICM42607_TEMP_STARTUP_TIME_MS)
+ sleepval = INV_ICM42607_TEMP_STARTUP_TIME_MS;
+ }
+ if (accel != oldaccel && oldaccel == INV_ICM42607_SENSOR_MODE_OFF) {
+ usleep_range(200, 300);
+ if (sleepval < INV_ICM42607_ACCEL_STARTUP_TIME_MS)
+ sleepval = INV_ICM42607_ACCEL_STARTUP_TIME_MS;
+ }
+ if (gyro != oldgyro) {
+ if (oldgyro == INV_ICM42607_SENSOR_MODE_OFF) {
+ usleep_range(200, 300);
+ if (sleepval < INV_ICM42607_GYRO_STARTUP_TIME_MS)
+ sleepval = INV_ICM42607_GYRO_STARTUP_TIME_MS;
+ } else if (gyro == INV_ICM42607_SENSOR_MODE_OFF) {
+ if (sleepval < INV_ICM42607_GYRO_STOP_TIME_MS)
+ sleepval = INV_ICM42607_GYRO_STOP_TIME_MS;
+ }
+ }
+
+ if (sleep_ms)
+ *sleep_ms = sleepval;
+ else if (sleepval)
+ msleep(sleepval);
+
+ return 0;
+}
+
int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
unsigned int writeval, unsigned int *readval)
{
@@ -219,6 +296,10 @@ static int inv_icm42607_enable_vddio_reg(struct inv_icm42607_state *st)
static void inv_icm42607_disable_vddio_reg(void *_data)
{
struct inv_icm42607_state *st = _data;
+ struct device *dev = regmap_get_device(st->map);
+
+ if (pm_runtime_status_suspended(dev))
+ return;
regulator_disable(st->vddio_supply);
}
@@ -289,11 +370,134 @@ int inv_icm42607_core_probe(struct regmap *regmap, int chip,
/* Setup chip registers (includes WHOAMI check, reset check, bus setup) */
ret = inv_icm42607_setup(st, bus_setup);
+ if (ret)
+ return ret; /* Return error from setup (e.g., WHOAMI fail) */
+
+ /* Setup runtime power management */
+ ret = devm_pm_runtime_set_active_enabled(dev);
+ if (ret)
+ return ret;
+
+ pm_runtime_set_autosuspend_delay(dev, INV_ICM42607_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
return ret;
}
EXPORT_SYMBOL_NS_GPL(inv_icm42607_core_probe, "IIO_ICM42607");
+/*
+ * Suspend saves sensors state and turns everything off.
+ * Check first if runtime suspend has not already done the job.
+ */
+static int inv_icm42607_suspend(struct device *dev)
+{
+ struct inv_icm42607_state *st = dev_get_drvdata(dev);
+ struct device *accel_dev;
+ bool wakeup;
+ int accel_conf;
+ int ret = 0;
+
+ guard(mutex)(&st->lock);
+
+ st->suspended.gyro = st->conf.gyro.mode;
+ st->suspended.accel = st->conf.accel.mode;
+ st->suspended.temp = st->conf.temp_en;
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ /* keep chip on and wake-up capable if APEX and wakeup on */
+ accel_dev = &st->indio_accel->dev;
+ wakeup = st->apex.on && device_may_wakeup(accel_dev);
+ if (wakeup) {
+ /* keep accel on and setup irq for wakeup */
+ accel_conf = st->conf.accel.mode;
+ enable_irq_wake(st->irq);
+ disable_irq(st->irq);
+ } else {
+ accel_conf = INV_ICM42607_SENSOR_MODE_OFF;
+ }
+
+ ret = inv_icm42607_set_pwr_mgmt0(st, INV_ICM42607_SENSOR_MODE_OFF,
+ INV_ICM42607_SENSOR_MODE_OFF, false,
+ NULL);
+ if (ret)
+ return ret;
+
+ if (!wakeup)
+ regulator_disable(st->vddio_supply);
+
+ return 0;
+}
+
+/*
+ * System resume gets the system back on and restores the sensors state.
+ * Manually put runtime power management in system active state.
+ */
+static int inv_icm42607_resume(struct device *dev)
+{
+ struct inv_icm42607_state *st = dev_get_drvdata(dev);
+ struct device *accel_dev;
+ bool wakeup;
+ int ret;
+
+ guard(mutex)(&st->lock);
+
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ /* check wakeup capability */
+ accel_dev = &st->indio_accel->dev;
+ wakeup = st->apex.on && device_may_wakeup(accel_dev);
+ /* restore irq state or vddio if cut off */
+ if (wakeup) {
+ enable_irq(st->irq);
+ disable_irq_wake(st->irq);
+ } else {
+ ret = inv_icm42607_enable_vddio_reg(st);
+ if (ret)
+ return ret;
+ }
+
+ /* restore sensors state */
+ ret = inv_icm42607_set_pwr_mgmt0(st, st->suspended.gyro,
+ st->suspended.accel,
+ st->suspended.temp, NULL);
+ return ret;
+}
+
+static int inv_icm42607_runtime_suspend(struct device *dev)
+{
+ struct inv_icm42607_state *st = dev_get_drvdata(dev);
+ int ret = 0;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_set_pwr_mgmt0(st, INV_ICM42607_SENSOR_MODE_OFF,
+ INV_ICM42607_SENSOR_MODE_OFF, false,
+ NULL);
+ if (ret)
+ return ret;
+
+ regulator_disable(st->vddio_supply);
+
+ return 0;
+}
+
+static int inv_icm42607_runtime_resume(struct device *dev)
+{
+ struct inv_icm42607_state *st = dev_get_drvdata(dev);
+
+ guard(mutex)(&st->lock);
+
+ return inv_icm42607_enable_vddio_reg(st);
+}
+
+EXPORT_NS_GPL_DEV_PM_OPS(inv_icm42607_pm_ops, IIO_ICM42607) = {
+ SYSTEM_SLEEP_PM_OPS(inv_icm42607_suspend, inv_icm42607_resume)
+ RUNTIME_PM_OPS(inv_icm42607_runtime_suspend,
+ inv_icm42607_runtime_resume, NULL)
+};
+
MODULE_AUTHOR("InvenSense, Inc.");
MODULE_DESCRIPTION("InvenSense ICM-42607x device driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_i2c.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_i2c.c
new file mode 100644
index 000000000000..eb72973debc5
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_i2c.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/property.h>
+
+#include "inv_icm42607.h"
+
+static int inv_icm42607_i2c_bus_setup(struct inv_icm42607_state *st)
+{
+ unsigned int mask, val;
+ int ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG1,
+ INV_ICM42607_INTF_CONFIG1_I3C_DDR_EN |
+ INV_ICM42607_INTF_CONFIG1_I3C_SDR_EN, 0);
+ if (ret)
+ return ret;
+
+ mask = INV_ICM42607_DRIVE_CONFIG2_I2C_MASK;
+ val = INV_ICM42607_DRIVE_CONFIG2_I2C(INV_ICM42607_SLEW_RATE_12_36NS);
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_DRIVE_CONFIG2,
+ mask, val);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG0,
+ INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_MASK,
+ INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS);
+}
+
+static int inv_icm42607_probe(struct i2c_client *client)
+{
+ const void *match;
+ enum inv_icm42607_chip chip;
+ struct regmap *regmap;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
+ return -EOPNOTSUPP;
+
+ match = device_get_match_data(&client->dev);
+ if (!match)
+ return -EINVAL;
+ chip = (uintptr_t)match;
+
+ regmap = devm_regmap_init_i2c(client, &inv_icm42607_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ return inv_icm42607_core_probe(regmap, chip, inv_icm42607_i2c_bus_setup);
+}
+
+static const struct i2c_device_id inv_icm42607_id[] = {
+ { "icm42607", INV_CHIP_ICM42607 },
+ { "icm42607p", INV_CHIP_ICM42607P },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, inv_icm42607_id);
+
+static const struct of_device_id inv_icm42607_of_matches[] = {
+ {
+ .compatible = "invensense,icm42607",
+ .data = (void *)INV_CHIP_ICM42607,
+ }, {
+ .compatible = "invensense,icm42607p",
+ .data = (void *)INV_CHIP_ICM42607P,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, inv_icm42607_of_matches);
+
+static struct i2c_driver inv_icm42607_driver = {
+ .driver = {
+ .name = "inv-icm42607-i2c",
+ .of_match_table = inv_icm42607_of_matches,
+ .pm = pm_ptr(&inv_icm42607_pm_ops),
+ },
+ .id_table = inv_icm42607_id,
+ .probe = inv_icm42607_probe,
+};
+module_i2c_driver(inv_icm42607_driver);
+
+MODULE_AUTHOR("InvenSense, Inc.");
+MODULE_DESCRIPTION("InvenSense ICM-42607x I2C driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_ICM42607");
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_spi.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_spi.c
new file mode 100644
index 000000000000..51ce3deeb706
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_spi.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+#include <linux/property.h>
+
+#include "inv_icm42607.h"
+
+static int inv_icm42607_spi_bus_setup(struct inv_icm42607_state *st)
+{
+ unsigned int mask, val;
+ int ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_DEVICE_CONFIG,
+ INV_ICM42607_DEVICE_CONFIG_SPI_AP_4WIRE,
+ INV_ICM42607_DEVICE_CONFIG_SPI_AP_4WIRE);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG1,
+ INV_ICM42607_INTF_CONFIG1_I3C_DDR_EN |
+ INV_ICM42607_INTF_CONFIG1_I3C_SDR_EN, 0);
+ if (ret)
+ return ret;
+
+ mask = INV_ICM42607_DRIVE_CONFIG3_SPI_MASK;
+ val = INV_ICM42607_DRIVE_CONFIG3_SPI(INV_ICM42607_SLEW_RATE_INF_2NS);
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_DRIVE_CONFIG3,
+ mask, val);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG0,
+ INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_MASK,
+ INV_ICM42607_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS);
+}
+
+static int inv_icm42607_probe(struct spi_device *spi)
+{
+ const void *match;
+ enum inv_icm42607_chip chip;
+ struct regmap *regmap;
+
+ match = device_get_match_data(&spi->dev);
+ if (!match)
+ return -EINVAL;
+ chip = (uintptr_t)match;
+
+ regmap = devm_regmap_init_spi(spi, &inv_icm42607_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&spi->dev, PTR_ERR(regmap),
+ "Failed to register spi regmap %ld\n",
+ PTR_ERR(regmap));
+
+ return inv_icm42607_core_probe(regmap, chip,
+ inv_icm42607_spi_bus_setup);
+}
+
+static const struct of_device_id inv_icm42607_of_matches[] = {
+ {
+ .compatible = "invensense,icm42607",
+ .data = (void *)INV_CHIP_ICM42607,
+ },
+ {
+ .compatible = "invensense,icm42607p",
+ .data = (void *)INV_CHIP_ICM42607P,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, inv_icm42607_of_matches);
+
+static const struct spi_device_id inv_icm42607_spi_id_table[] = {
+ { "icm42607", INV_CHIP_ICM42607 },
+ { "icm42607p", INV_CHIP_ICM42607P },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, inv_icm42607_spi_id_table);
+
+static struct spi_driver inv_icm42607_driver = {
+ .driver = {
+ .name = "inv-icm42607-spi",
+ .of_match_table = inv_icm42607_of_matches,
+ .pm = &inv_icm42607_pm_ops,
+ },
+ .id_table = inv_icm42607_spi_id_table,
+ .probe = inv_icm42607_probe,
+};
+module_spi_driver(inv_icm42607_driver);
+
+MODULE_AUTHOR("InvenSense, Inc.");
+MODULE_DESCRIPTION("InvenSense ICM-42607x SPI driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_ICM42607");
--
2.43.0
_______________________________________________
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Linux-rockchip@lists.infradead.org
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 4/9] iio: imu: inv_icm42607: Add Buffer support functions to icm42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (2 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 3/9] iio: imu: inv_icm42607: Add I2C and SPI For icm42607 Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 5/9] iio: imu: inv_icm42607: Add Temperature Support in icm42607 Chris Morgan
` (5 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add all FIFO parsing and reading functions to support
inv_icm42607 hardware.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 4 +
.../imu/inv_icm42607/inv_icm42607_buffer.c | 496 ++++++++++++++++++
.../imu/inv_icm42607/inv_icm42607_buffer.h | 98 ++++
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 25 +
4 files changed, 623 insertions(+)
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
index 7d13091aa8df..5530fd3bc03f 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -15,6 +15,8 @@
#include <linux/iio/iio.h>
#include <linux/iio/common/inv_sensors_timestamp.h>
+#include "inv_icm42607_buffer.h"
+
enum inv_icm42607_chip {
INV_CHIP_INVALID,
INV_CHIP_ICM42607P,
@@ -137,6 +139,7 @@ struct inv_icm42607_apex {
* @indio_accel: accelerometer IIO device.
* @timestamp: interrupt timestamps.
* @apex: APEX (Advanced Pedometer and Event detection) management
+ * @fifo: FIFO management structure.
* @buffer: data transfer buffer aligned for DMA.
*/
struct inv_icm42607_state {
@@ -156,6 +159,7 @@ struct inv_icm42607_state {
s64 accel;
} timestamp;
struct inv_icm42607_apex apex;
+ struct inv_icm42607_fifo fifo;
u8 buffer[3] __aligned(IIO_DMA_MINALIGN);
};
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
new file mode 100644
index 000000000000..4f5f199586fc
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
@@ -0,0 +1,496 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/minmax.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/common/inv_sensors_timestamp.h>
+#include <linux/iio/iio.h>
+
+#include "inv_icm42607.h"
+#include "inv_icm42607_buffer.h"
+
+/* FIFO header: 1 byte */
+#define INV_ICM42607_FIFO_HEADER_MSG BIT(7)
+#define INV_ICM42607_FIFO_HEADER_ACCEL BIT(6)
+#define INV_ICM42607_FIFO_HEADER_GYRO BIT(5)
+#define INV_ICM42607_FIFO_HEADER_TMST_FSYNC GENMASK(3, 2)
+#define INV_ICM42607_FIFO_HEADER_ODR_ACCEL BIT(1)
+#define INV_ICM42607_FIFO_HEADER_ODR_GYRO BIT(0)
+
+struct inv_icm42607_fifo_1sensor_packet {
+ u8 header;
+ struct inv_icm42607_fifo_sensor_data data;
+ s8 temp;
+} __packed;
+#define INV_ICM42607_FIFO_1SENSOR_PACKET_SIZE 8
+
+struct inv_icm42607_fifo_2sensors_packet {
+ u8 header;
+ struct inv_icm42607_fifo_sensor_data accel;
+ struct inv_icm42607_fifo_sensor_data gyro;
+ s8 temp;
+ __be16 timestamp;
+} __packed;
+#define INV_ICM42607_FIFO_2SENSORS_PACKET_SIZE 16
+
+ssize_t inv_icm42607_fifo_decode_packet(const void *packet, const void **accel,
+ const void **gyro, const int8_t **temp,
+ const void **timestamp, unsigned int *odr)
+{
+ const struct inv_icm42607_fifo_1sensor_packet *pack1 = packet;
+ const struct inv_icm42607_fifo_2sensors_packet *pack2 = packet;
+ u8 header = *((const u8 *)packet);
+
+ /* FIFO empty */
+ if (header & INV_ICM42607_FIFO_HEADER_MSG) {
+ *accel = NULL;
+ *gyro = NULL;
+ *temp = NULL;
+ *timestamp = NULL;
+ *odr = 0;
+ return 0;
+ }
+
+ /* handle odr flags */
+ *odr = 0;
+ if (header & INV_ICM42607_FIFO_HEADER_ODR_GYRO)
+ *odr |= INV_ICM42607_SENSOR_GYRO;
+ if (header & INV_ICM42607_FIFO_HEADER_ODR_ACCEL)
+ *odr |= INV_ICM42607_SENSOR_ACCEL;
+
+ /* accel + gyro */
+ if ((header & INV_ICM42607_FIFO_HEADER_ACCEL) &&
+ (header & INV_ICM42607_FIFO_HEADER_GYRO)) {
+ *accel = &pack2->accel;
+ *gyro = &pack2->gyro;
+ *temp = &pack2->temp;
+ *timestamp = &pack2->timestamp;
+ return INV_ICM42607_FIFO_2SENSORS_PACKET_SIZE;
+ }
+
+ /* accel only */
+ if (header & INV_ICM42607_FIFO_HEADER_ACCEL) {
+ *accel = &pack1->data;
+ *gyro = NULL;
+ *temp = &pack1->temp;
+ *timestamp = NULL;
+ return INV_ICM42607_FIFO_1SENSOR_PACKET_SIZE;
+ }
+
+ /* gyro only */
+ if (header & INV_ICM42607_FIFO_HEADER_GYRO) {
+ *accel = NULL;
+ *gyro = &pack1->data;
+ *temp = &pack1->temp;
+ *timestamp = NULL;
+ return INV_ICM42607_FIFO_1SENSOR_PACKET_SIZE;
+ }
+
+ /* invalid packet if here */
+ return -EINVAL;
+}
+
+void inv_icm42607_buffer_update_fifo_period(struct inv_icm42607_state *st)
+{
+ u32 period_gyro, period_accel;
+
+ if (st->fifo.en & INV_ICM42607_SENSOR_GYRO)
+ period_gyro = inv_icm42607_odr_to_period(st->conf.gyro.odr);
+ else
+ period_gyro = U32_MAX;
+
+ if (st->fifo.en & INV_ICM42607_SENSOR_ACCEL)
+ period_accel = inv_icm42607_odr_to_period(st->conf.accel.odr);
+ else
+ period_accel = U32_MAX;
+
+ st->fifo.period = min(period_gyro, period_accel);
+}
+
+int inv_icm42607_buffer_set_fifo_en(struct inv_icm42607_state *st,
+ unsigned int fifo_en)
+{
+ unsigned int val;
+ int ret;
+
+ /* update FIFO EN bits for accel and gyro */
+ val = 0;
+ if (fifo_en & INV_ICM42607_SENSOR_GYRO)
+ val |= INV_ICM42607_FIFO_CONFIG1_MODE;
+ if (fifo_en & INV_ICM42607_SENSOR_ACCEL)
+ val |= INV_ICM42607_FIFO_CONFIG1_MODE;
+ if (fifo_en & INV_ICM42607_SENSOR_TEMP)
+ val |= INV_ICM42607_FIFO_CONFIG1_MODE;
+
+ ret = regmap_write(st->map, INV_ICM42607_REG_FIFO_CONFIG1, val);
+ if (ret)
+ return ret;
+
+ st->fifo.en = fifo_en;
+ inv_icm42607_buffer_update_fifo_period(st);
+
+ return 0;
+}
+
+static size_t inv_icm42607_get_packet_size(unsigned int fifo_en)
+{
+ size_t packet_size;
+
+ if ((fifo_en & INV_ICM42607_SENSOR_GYRO) &&
+ (fifo_en & INV_ICM42607_SENSOR_ACCEL))
+ packet_size = INV_ICM42607_FIFO_2SENSORS_PACKET_SIZE;
+ else
+ packet_size = INV_ICM42607_FIFO_1SENSOR_PACKET_SIZE;
+
+ return packet_size;
+}
+
+static unsigned int inv_icm42607_wm_truncate(unsigned int watermark,
+ size_t packet_size)
+{
+ size_t wm_size;
+ unsigned int wm;
+
+ wm_size = watermark * packet_size;
+ if (wm_size > INV_ICM42607_FIFO_WATERMARK_MAX)
+ wm_size = INV_ICM42607_FIFO_WATERMARK_MAX;
+
+ wm = wm_size / packet_size;
+
+ return wm;
+}
+
+/**
+ * inv_icm42607_buffer_update_watermark - update watermark FIFO threshold
+ * @st: driver internal state
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ */
+int inv_icm42607_buffer_update_watermark(struct inv_icm42607_state *st)
+{
+ size_t packet_size, wm_size;
+ unsigned int wm_gyro, wm_accel, watermark;
+ u32 period_gyro, period_accel;
+ u32 latency_gyro, latency_accel, latency;
+ bool restore;
+ __le16 raw_wm;
+ int ret;
+
+ packet_size = inv_icm42607_get_packet_size(st->fifo.en);
+
+ /* compute sensors latency, depending on sensor watermark and odr */
+ wm_gyro = inv_icm42607_wm_truncate(st->fifo.watermark.gyro, packet_size);
+ wm_accel = inv_icm42607_wm_truncate(st->fifo.watermark.accel, packet_size);
+ /* use us for odr to avoid overflow using 32 bits values */
+ period_gyro = inv_icm42607_odr_to_period(st->conf.gyro.odr) / 1000UL;
+ period_accel = inv_icm42607_odr_to_period(st->conf.accel.odr) / 1000UL;
+ latency_gyro = period_gyro * wm_gyro;
+ latency_accel = period_accel * wm_accel;
+
+ /* 0 value for watermark means that the sensor is turned off */
+ if (wm_gyro == 0 && wm_accel == 0)
+ return 0;
+
+ if (latency_gyro == 0) {
+ watermark = wm_accel;
+ st->fifo.watermark.eff_accel = wm_accel;
+ } else if (latency_accel == 0) {
+ watermark = wm_gyro;
+ st->fifo.watermark.eff_gyro = wm_gyro;
+ } else {
+ /* compute the smallest latency that is a multiple of both */
+ if (latency_gyro <= latency_accel)
+ latency = latency_gyro - (latency_accel % latency_gyro);
+ else
+ latency = latency_accel - (latency_gyro % latency_accel);
+ /* all this works because periods are multiple of each others */
+ watermark = latency / min(period_gyro, period_accel);
+ if (watermark < 1)
+ watermark = 1;
+ /* update effective watermark */
+ st->fifo.watermark.eff_gyro = latency / period_gyro;
+ if (st->fifo.watermark.eff_gyro < 1)
+ st->fifo.watermark.eff_gyro = 1;
+ st->fifo.watermark.eff_accel = latency / period_accel;
+ if (st->fifo.watermark.eff_accel < 1)
+ st->fifo.watermark.eff_accel = 1;
+ }
+
+ /* compute watermark value in bytes */
+ wm_size = watermark * packet_size;
+
+ /* changing FIFO watermark requires to turn off watermark interrupt */
+ ret = regmap_update_bits_check(st->map, INV_ICM42607_REG_INT_SOURCE0,
+ INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN,
+ 0, &restore);
+ if (ret)
+ return ret;
+
+ raw_wm = INV_ICM42607_FIFO_WATERMARK_VAL(wm_size);
+ memcpy(st->buffer, &raw_wm, sizeof(raw_wm));
+ ret = regmap_bulk_write(st->map, INV_ICM42607_REG_FIFO_CONFIG2,
+ st->buffer, sizeof(raw_wm));
+ if (ret)
+ return ret;
+
+ /* restore watermark interrupt */
+ if (restore) {
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INT_SOURCE0,
+ INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN,
+ INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int inv_icm42607_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct device *dev = regmap_get_device(st->map);
+ struct inv_icm42607_sensor_state *sensor_st = iio_priv(indio_dev);
+ struct inv_sensors_timestamp *ts = &sensor_st->ts;
+
+ pm_runtime_get_sync(dev);
+
+ guard(mutex)(&st->lock);
+ inv_sensors_timestamp_reset(ts);
+
+ return 0;
+}
+
+/*
+ * update_scan_mode callback is turning sensors on and setting data FIFO enable
+ * bits.
+ */
+static int inv_icm42607_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ guard(mutex)(&st->lock);
+
+ /* exit if FIFO is already on */
+ if (st->fifo.on) {
+ st->fifo.on++;
+ return 0;
+ }
+
+ /* set FIFO threshold interrupt */
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INT_SOURCE0,
+ INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN,
+ INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN);
+ if (ret)
+ return ret;
+
+ /* flush FIFO data */
+ ret = regmap_write(st->map, INV_ICM42607_REG_SIGNAL_PATH_RESET,
+ INV_ICM42607_SIGNAL_PATH_RESET_FIFO_FLUSH);
+ if (ret)
+ return ret;
+
+ /* set FIFO in streaming mode */
+ ret = regmap_write(st->map, INV_ICM42607_REG_FIFO_CONFIG1,
+ INV_ICM42607_FIFO_CONFIG1_MODE);
+ if (ret)
+ return ret;
+
+ /* workaround: first read of FIFO count after reset is always 0 */
+ ret = regmap_bulk_read(st->map, INV_ICM42607_REG_FIFO_COUNTH, st->buffer, 2);
+ if (ret)
+ return ret;
+
+ st->fifo.on++;
+
+ return 0;
+}
+
+static int inv_icm42607_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ guard(mutex)(&st->lock);
+
+ if (st->fifo.on > 1) {
+ st->fifo.on--;
+ return 0;
+ }
+
+ /* set FIFO in bypass mode */
+ ret = regmap_write(st->map, INV_ICM42607_REG_FIFO_CONFIG1,
+ INV_ICM42607_FIFO_CONFIG1_BYPASS);
+ if (ret)
+ return ret;
+
+ /* flush FIFO data */
+ ret = regmap_write(st->map, INV_ICM42607_REG_SIGNAL_PATH_RESET,
+ INV_ICM42607_SIGNAL_PATH_RESET_FIFO_FLUSH);
+ if (ret)
+ return ret;
+
+ /* disable FIFO threshold interrupt */
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INT_SOURCE0,
+ INV_ICM42607_INT_SOURCE0_FIFO_THS_INT1_EN, 0);
+ if (ret)
+ return ret;
+
+ st->fifo.on--;
+
+ return 0;
+}
+
+static int inv_icm42607_buffer_postdisable(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int sensor;
+ unsigned int *watermark;
+ unsigned int sleep_temp = 0;
+ unsigned int sleep_sensor = 0;
+ unsigned int sleep;
+ int ret;
+
+ if (indio_dev == st->indio_gyro) {
+ sensor = INV_ICM42607_SENSOR_GYRO;
+ watermark = &st->fifo.watermark.gyro;
+ } else if (indio_dev == st->indio_accel) {
+ sensor = INV_ICM42607_SENSOR_ACCEL;
+ watermark = &st->fifo.watermark.accel;
+ } else {
+ return -EINVAL;
+ }
+
+ mutex_lock(&st->lock);
+
+ ret = inv_icm42607_buffer_set_fifo_en(st, st->fifo.en & ~sensor);
+ if (ret)
+ goto out_unlock;
+
+ *watermark = 0;
+ ret = inv_icm42607_buffer_update_watermark(st);
+ if (ret)
+ goto out_unlock;
+
+out_unlock:
+ mutex_unlock(&st->lock);
+
+ /* sleep maximum required time */
+ sleep = max(sleep_sensor, sleep_temp);
+ if (sleep)
+ msleep(sleep);
+
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+
+const struct iio_buffer_setup_ops inv_icm42607_buffer_ops = {
+ .preenable = inv_icm42607_buffer_preenable,
+ .postenable = inv_icm42607_buffer_postenable,
+ .predisable = inv_icm42607_buffer_predisable,
+ .postdisable = inv_icm42607_buffer_postdisable,
+};
+
+int inv_icm42607_buffer_fifo_read(struct inv_icm42607_state *st,
+ unsigned int max)
+{
+ size_t max_count;
+ __be16 *raw_fifo_count;
+ ssize_t i, size;
+ const void *accel, *gyro, *timestamp;
+ const s8 *temp;
+ unsigned int odr;
+ int ret;
+
+ /* reset all samples counters */
+ st->fifo.count = 0;
+ st->fifo.nb.gyro = 0;
+ st->fifo.nb.accel = 0;
+ st->fifo.nb.total = 0;
+
+ /* compute maximum FIFO read size */
+ if (max == 0)
+ max_count = sizeof(st->fifo.data);
+ else
+ max_count = max * inv_icm42607_get_packet_size(st->fifo.en);
+
+ /* read FIFO count value */
+ raw_fifo_count = (__be16 *)st->buffer;
+ ret = regmap_bulk_read(st->map, INV_ICM42607_REG_FIFO_COUNTH,
+ raw_fifo_count, sizeof(*raw_fifo_count));
+ if (ret)
+ return ret;
+ st->fifo.count = be16_to_cpup(raw_fifo_count);
+
+ /* check and clamp FIFO count value */
+ if (st->fifo.count == 0)
+ return 0;
+ if (st->fifo.count > max_count)
+ st->fifo.count = max_count;
+
+ /* read all FIFO data in internal buffer */
+ ret = regmap_noinc_read(st->map, INV_ICM42607_REG_FIFO_DATA,
+ st->fifo.data, st->fifo.count);
+ if (ret)
+ return ret;
+
+ /* compute number of samples for each sensor */
+ for (i = 0; i < st->fifo.count; i += size) {
+ size = inv_icm42607_fifo_decode_packet(&st->fifo.data[i],
+ &accel, &gyro, &temp, ×tamp, &odr);
+ if (size <= 0)
+ break;
+ if (gyro != NULL && inv_icm42607_fifo_is_data_valid(gyro))
+ st->fifo.nb.gyro++;
+ if (accel != NULL && inv_icm42607_fifo_is_data_valid(accel))
+ st->fifo.nb.accel++;
+ st->fifo.nb.total++;
+ }
+
+ return 0;
+}
+
+int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
+ unsigned int count)
+{
+ s64 gyro_ts, accel_ts;
+ int ret;
+
+ gyro_ts = iio_get_time_ns(st->indio_gyro);
+ accel_ts = iio_get_time_ns(st->indio_accel);
+
+ ret = inv_icm42607_buffer_fifo_read(st, count);
+
+ return ret;
+}
+
+int inv_icm42607_buffer_init(struct inv_icm42607_state *st)
+{
+ unsigned int val;
+ int ret;
+
+ st->fifo.watermark.eff_gyro = 1;
+ st->fifo.watermark.eff_accel = 1;
+
+ /* Configure FIFO_COUNT format in bytes and big endian */
+ val = INV_ICM42607_INTF_CONFIG0_FIFO_COUNT_ENDIAN;
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_INTF_CONFIG0,
+ val, val);
+ if (ret)
+ return ret;
+
+ /* Initialize FIFO in bypass mode */
+ return regmap_write(st->map, INV_ICM42607_REG_FIFO_CONFIG1,
+ INV_ICM42607_FIFO_CONFIG1_BYPASS);
+}
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h
new file mode 100644
index 000000000000..64a66c00a861
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#ifndef INV_ICM42607_BUFFER_H_
+#define INV_ICM42607_BUFFER_H_
+
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+
+struct inv_icm42607_state;
+
+#define INV_ICM42607_SENSOR_GYRO BIT(0)
+#define INV_ICM42607_SENSOR_ACCEL BIT(1)
+#define INV_ICM42607_SENSOR_TEMP BIT(2)
+
+/**
+ * struct inv_icm42607_fifo - FIFO state variables
+ * @on: reference counter for FIFO on.
+ * @en: bits field of INV_ICM42607_SENSOR_* for FIFO EN bits.
+ * @period: FIFO internal period.
+ * @watermark: watermark configuration values for accel and gyro.
+ * @count: number of bytes in the FIFO data buffer.
+ * @nb: gyro, accel and total samples in the FIFO data buffer.
+ * @data: FIFO data buffer aligned for DMA (2kB + 32 bytes of read cache).
+ */
+struct inv_icm42607_fifo {
+ unsigned int on;
+ unsigned int en;
+ u32 period;
+ struct {
+ unsigned int gyro;
+ unsigned int accel;
+ unsigned int eff_gyro;
+ unsigned int eff_accel;
+ } watermark;
+ size_t count;
+ struct {
+ size_t gyro;
+ size_t accel;
+ size_t total;
+ } nb;
+ u8 data[2080] __aligned(IIO_DMA_MINALIGN);
+};
+
+/* FIFO data packet */
+struct inv_icm42607_fifo_sensor_data {
+ __be16 x;
+ __be16 y;
+ __be16 z;
+} __packed;
+#define INV_ICM42607_FIFO_DATA_INVALID -32768
+
+static inline s16 inv_icm42607_fifo_get_sensor_data(__be16 d)
+{
+ return be16_to_cpu(d);
+}
+
+static inline bool
+inv_icm42607_fifo_is_data_valid(const struct inv_icm42607_fifo_sensor_data *s)
+{
+ s16 x, y, z;
+
+ x = inv_icm42607_fifo_get_sensor_data(s->x);
+ y = inv_icm42607_fifo_get_sensor_data(s->y);
+ z = inv_icm42607_fifo_get_sensor_data(s->z);
+
+ if (x == INV_ICM42607_FIFO_DATA_INVALID &&
+ y == INV_ICM42607_FIFO_DATA_INVALID &&
+ z == INV_ICM42607_FIFO_DATA_INVALID)
+ return false;
+
+ return true;
+}
+
+ssize_t inv_icm42607_fifo_decode_packet(const void *packet, const void **accel,
+ const void **gyro, const s8 **temp,
+ const void **timestamp, unsigned int *odr);
+
+extern const struct iio_buffer_setup_ops inv_icm42607_buffer_ops;
+
+int inv_icm42607_buffer_init(struct inv_icm42607_state *st);
+
+void inv_icm42607_buffer_update_fifo_period(struct inv_icm42607_state *st);
+
+int inv_icm42607_buffer_set_fifo_en(struct inv_icm42607_state *st,
+ unsigned int fifo_en);
+
+int inv_icm42607_buffer_update_watermark(struct inv_icm42607_state *st);
+
+int inv_icm42607_buffer_fifo_read(struct inv_icm42607_state *st,
+ unsigned int max);
+
+int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
+ unsigned int count);
+
+#endif
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
index da04c820dab2..344071089042 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -18,6 +18,7 @@
#include <linux/iio/iio.h>
#include "inv_icm42607.h"
+#include "inv_icm42607_buffer.h"
static const struct regmap_range_cfg inv_icm42607_regmap_ranges[] = {
{
@@ -373,6 +374,11 @@ int inv_icm42607_core_probe(struct regmap *regmap, int chip,
if (ret)
return ret; /* Return error from setup (e.g., WHOAMI fail) */
+ /* Initialize buffer/FIFO handling */
+ ret = inv_icm42607_buffer_init(st);
+ if (ret)
+ return ret;
+
/* Setup runtime power management */
ret = devm_pm_runtime_set_active_enabled(dev);
if (ret)
@@ -405,6 +411,13 @@ static int inv_icm42607_suspend(struct device *dev)
if (pm_runtime_suspended(dev))
return 0;
+ if (st->fifo.on) {
+ ret = regmap_write(st->map, INV_ICM42607_REG_FIFO_CONFIG1,
+ INV_ICM42607_FIFO_CONFIG1_BYPASS);
+ if (ret)
+ return ret;
+ }
+
/* keep chip on and wake-up capable if APEX and wakeup on */
accel_dev = &st->indio_accel->dev;
wakeup = st->apex.on && device_may_wakeup(accel_dev);
@@ -436,6 +449,8 @@ static int inv_icm42607_suspend(struct device *dev)
static int inv_icm42607_resume(struct device *dev)
{
struct inv_icm42607_state *st = dev_get_drvdata(dev);
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(st->indio_gyro);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(st->indio_accel);
struct device *accel_dev;
bool wakeup;
int ret;
@@ -462,6 +477,16 @@ static int inv_icm42607_resume(struct device *dev)
ret = inv_icm42607_set_pwr_mgmt0(st, st->suspended.gyro,
st->suspended.accel,
st->suspended.temp, NULL);
+ if (ret)
+ return ret;
+
+ if (st->fifo.on) {
+ inv_sensors_timestamp_reset(&gyro_st->ts);
+ inv_sensors_timestamp_reset(&accel_st->ts);
+ ret = regmap_write(st->map, INV_ICM42607_REG_FIFO_CONFIG1,
+ INV_ICM42607_FIFO_CONFIG1_MODE);
+ }
+
return ret;
}
--
2.43.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 5/9] iio: imu: inv_icm42607: Add Temperature Support in icm42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (3 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 4/9] iio: imu: inv_icm42607: Add Buffer support functions to icm42607 Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 6/9] iio: imu: inv_icm42607: Add Accelerometer for icm42607 Chris Morgan
` (4 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add functions for reading temperature sensor data.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 3 +
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 17 ++++
.../iio/imu/inv_icm42607/inv_icm42607_temp.c | 81 +++++++++++++++++++
.../iio/imu/inv_icm42607/inv_icm42607_temp.h | 30 +++++++
4 files changed, 131 insertions(+)
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
index 5530fd3bc03f..086848c8fd3b 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -433,6 +433,9 @@ extern const struct dev_pm_ops inv_icm42607_pm_ops;
u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr);
+int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
+ unsigned int *sleep_ms);
+
int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
unsigned int writeval, unsigned int *readval);
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
index 344071089042..735a262dc103 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -164,6 +164,23 @@ static int inv_icm42607_set_pwr_mgmt0(struct inv_icm42607_state *st,
return 0;
}
+int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
+ unsigned int *sleep_ms)
+{
+ unsigned int val;
+ int ret;
+
+ val = INV_ICM42607_TEMP_CONFIG0_FILTER(INV_ICM42607_FILTER_BW_34HZ);
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_TEMP_CONFIG0,
+ INV_ICM42607_TEMP_CONFIG0_FILTER_MASK, val);
+ if (ret)
+ return ret;
+
+ return inv_icm42607_set_pwr_mgmt0(st, st->conf.gyro.mode,
+ st->conf.accel.mode, enable,
+ sleep_ms);
+}
+
int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
unsigned int writeval, unsigned int *readval)
{
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c
new file mode 100644
index 000000000000..b42eb78cd960
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+
+#include "inv_icm42607.h"
+#include "inv_icm42607_temp.h"
+
+static int inv_icm42607_temp_read(struct inv_icm42607_state *st, s16 *temp)
+{
+ struct device *dev = regmap_get_device(st->map);
+ __be16 *raw;
+ int ret;
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_set_temp_conf(st, true, NULL);
+ if (ret)
+ return ret;
+
+ raw = (__be16 *)&st->buffer[0];
+ ret = regmap_bulk_read(st->map, INV_ICM42607_REG_TEMP_DATA1, raw, sizeof(*raw));
+ if (ret)
+ return ret;
+
+ *temp = (s16)be16_to_cpup(raw);
+ if (*temp == INV_ICM42607_DATA_INVALID)
+ ret = -EINVAL;
+
+ return ret;
+}
+
+int inv_icm42607_temp_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ s16 temp;
+ int ret;
+
+ if (chan->type != IIO_TEMP)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_temp_read(st, &temp);
+ iio_device_release_direct(indio_dev);
+ if (ret)
+ return ret;
+ *val = temp;
+ return IIO_VAL_INT;
+ /*
+ * T°C = (temp / 128) + 25
+ * Tm°C = 1000 * ((temp * 100 / 12800) + 25)
+ * scale: 100000 / 12800 ~= 7.8125
+ * offset: 25000
+ */
+ case IIO_CHAN_INFO_SCALE:
+ *val = 7;
+ *val2 = 812500;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = 25000;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h b/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h
new file mode 100644
index 000000000000..d0bd6c460ff2
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#ifndef INV_ICM42607_TEMP_H_
+#define INV_ICM42607_TEMP_H_
+
+#include <linux/iio/iio.h>
+
+#define INV_ICM42607_TEMP_CHAN(_index) \
+{ \
+ .type = IIO_TEMP, \
+ .info_mask_separate = \
+ BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ }, \
+}
+
+int inv_icm42607_temp_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask);
+
+#endif
--
2.43.0
_______________________________________________
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 6/9] iio: imu: inv_icm42607: Add Accelerometer for icm42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (4 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 5/9] iio: imu: inv_icm42607: Add Temperature Support in icm42607 Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 7/9] iio: imu: inv_icm42607: Add Interrupt and Wake on Movement " Chris Morgan
` (3 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add icm42607 accelerometer sensor for icm42607.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 12 +
.../iio/imu/inv_icm42607/inv_icm42607_accel.c | 725 ++++++++++++++++++
.../imu/inv_icm42607/inv_icm42607_buffer.c | 49 +-
.../imu/inv_icm42607/inv_icm42607_buffer.h | 2 +
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 60 ++
5 files changed, 847 insertions(+), 1 deletion(-)
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
index 086848c8fd3b..56bb09e2c304 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -431,8 +431,16 @@ typedef int (*inv_icm42607_bus_setup)(struct inv_icm42607_state *);
extern const struct regmap_config inv_icm42607_regmap_config;
extern const struct dev_pm_ops inv_icm42607_pm_ops;
+const struct iio_mount_matrix *
+inv_icm42607_get_mount_matrix(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan);
+
u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr);
+int inv_icm42607_set_accel_conf(struct inv_icm42607_state *st,
+ struct inv_icm42607_sensor_conf *conf,
+ unsigned int *sleep_ms);
+
int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
unsigned int *sleep_ms);
@@ -442,4 +450,8 @@ int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
int inv_icm42607_core_probe(struct regmap *regmap, int chip,
inv_icm42607_bus_setup bus_setup);
+struct iio_dev *inv_icm42607_accel_init(struct inv_icm42607_state *st);
+
+int inv_icm42607_accel_parse_fifo(struct iio_dev *indio_dev);
+
#endif
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c
new file mode 100644
index 000000000000..58754af31100
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c
@@ -0,0 +1,725 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/math64.h>
+#include <linux/minmax.h>
+#include <linux/units.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/common/inv_sensors_timestamp.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+
+#include "inv_icm42607.h"
+#include "inv_icm42607_temp.h"
+#include "inv_icm42607_buffer.h"
+
+#define INV_ICM42607_ACCEL_CHAN(_modifier, _index, _ext_info) \
+{ \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = _modifier, \
+ .info_mask_separate = \
+ BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_type_available = \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_all = \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .info_mask_shared_by_all_available = \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+ .ext_info = _ext_info, \
+}
+
+#define INV_ICM42607_ACCEL_EVENT_CHAN(_modifier, _events, _events_nb) \
+ { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = _modifier, \
+ .event_spec = _events, \
+ .num_event_specs = _events_nb, \
+ .scan_index = -1, \
+ }
+
+enum inv_icm42607_accel_scan {
+ INV_ICM42607_ACCEL_SCAN_X,
+ INV_ICM42607_ACCEL_SCAN_Y,
+ INV_ICM42607_ACCEL_SCAN_Z,
+ INV_ICM42607_ACCEL_SCAN_TEMP,
+ INV_ICM42607_ACCEL_SCAN_TIMESTAMP,
+};
+
+static const char * const inv_icm42607_accel_power_mode_items[] = {
+ "low-noise",
+ "low-power",
+};
+
+static const int inv_icm42607_accel_power_mode_values[] = {
+ INV_ICM42607_SENSOR_MODE_LOW_NOISE,
+ INV_ICM42607_SENSOR_MODE_LOW_POWER,
+};
+static const int inv_icm42607_accel_filter_values[] = {
+ INV_ICM42607_FILTER_BW_25HZ,
+ INV_ICM42607_FILTER_AVG_16X,
+};
+
+static int inv_icm42607_accel_power_mode_set(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int idx)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ int power_mode, filter;
+
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ if (idx >= ARRAY_SIZE(inv_icm42607_accel_power_mode_values))
+ return -EINVAL;
+
+ power_mode = inv_icm42607_accel_power_mode_values[idx];
+ filter = inv_icm42607_accel_filter_values[idx];
+
+ guard(mutex)(&st->lock);
+
+ /* cannot change if accel sensor is on */
+ if (st->conf.accel.mode != INV_ICM42607_SENSOR_MODE_OFF)
+ return -EBUSY;
+
+ /* prevent change if power mode is not supported by the ODR */
+ switch (power_mode) {
+ case INV_ICM42607_SENSOR_MODE_LOW_NOISE:
+ if (st->conf.accel.odr >= INV_ICM42607_ODR_6_25HZ_LP)
+ return -EPERM;
+ break;
+ case INV_ICM42607_SENSOR_MODE_LOW_POWER:
+ default:
+ if (st->conf.accel.odr <= INV_ICM42607_ODR_800HZ)
+ return -EPERM;
+ break;
+ }
+
+ accel_st->power_mode = power_mode;
+ accel_st->filter = filter;
+
+ return 0;
+}
+
+static int inv_icm42607_accel_power_mode_get(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ unsigned int idx;
+ int power_mode;
+
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ guard(mutex)(&st->lock);
+
+ /* if sensor is on, returns actual power mode and not configured one */
+ switch (st->conf.accel.mode) {
+ case INV_ICM42607_SENSOR_MODE_LOW_POWER:
+ case INV_ICM42607_SENSOR_MODE_LOW_NOISE:
+ power_mode = st->conf.accel.mode;
+ break;
+ default:
+ power_mode = accel_st->power_mode;
+ break;
+ }
+
+ for (idx = 0; idx < ARRAY_SIZE(inv_icm42607_accel_power_mode_values); ++idx) {
+ if (power_mode == inv_icm42607_accel_power_mode_values[idx])
+ break;
+ }
+ if (idx >= ARRAY_SIZE(inv_icm42607_accel_power_mode_values))
+ return -EINVAL;
+
+ return idx;
+}
+
+static const struct iio_enum inv_icm42607_accel_power_mode_enum = {
+ .items = inv_icm42607_accel_power_mode_items,
+ .num_items = ARRAY_SIZE(inv_icm42607_accel_power_mode_items),
+ .set = inv_icm42607_accel_power_mode_set,
+ .get = inv_icm42607_accel_power_mode_get,
+};
+
+static const struct iio_chan_spec_ext_info inv_icm42607_accel_ext_infos[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, inv_icm42607_get_mount_matrix),
+ IIO_ENUM_AVAILABLE("power_mode", IIO_SHARED_BY_TYPE,
+ &inv_icm42607_accel_power_mode_enum),
+ IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE,
+ &inv_icm42607_accel_power_mode_enum),
+ { },
+};
+
+static const struct iio_chan_spec inv_icm42607_accel_channels[] = {
+ INV_ICM42607_ACCEL_CHAN(IIO_MOD_X, INV_ICM42607_ACCEL_SCAN_X,
+ inv_icm42607_accel_ext_infos),
+ INV_ICM42607_ACCEL_CHAN(IIO_MOD_Y, INV_ICM42607_ACCEL_SCAN_Y,
+ inv_icm42607_accel_ext_infos),
+ INV_ICM42607_ACCEL_CHAN(IIO_MOD_Z, INV_ICM42607_ACCEL_SCAN_Z,
+ inv_icm42607_accel_ext_infos),
+ INV_ICM42607_TEMP_CHAN(INV_ICM42607_ACCEL_SCAN_TEMP),
+ IIO_CHAN_SOFT_TIMESTAMP(INV_ICM42607_ACCEL_SCAN_TIMESTAMP),
+};
+
+static const struct iio_event_spec inv_icm42607_motion_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
+ },
+};
+
+/*
+ * IIO buffer data: size must be a power of 2 and timestamp aligned
+ * 16 bytes: 6 bytes acceleration, 2 bytes temperature, 8 bytes timestamp
+ */
+struct inv_icm42607_accel_buffer {
+ struct inv_icm42607_fifo_sensor_data accel;
+ s16 temp;
+ aligned_s64 timestamp;
+};
+
+#define INV_ICM42607_SCAN_MASK_ACCEL_3AXIS \
+ (BIT(INV_ICM42607_ACCEL_SCAN_X) | \
+ BIT(INV_ICM42607_ACCEL_SCAN_Y) | \
+ BIT(INV_ICM42607_ACCEL_SCAN_Z))
+
+#define INV_ICM42607_SCAN_MASK_TEMP BIT(INV_ICM42607_ACCEL_SCAN_TEMP)
+
+static const unsigned long inv_icm42607_accel_scan_masks[] = {
+ /* 3-axis accel + temperature */
+ INV_ICM42607_SCAN_MASK_ACCEL_3AXIS | INV_ICM42607_SCAN_MASK_TEMP,
+ 0,
+};
+
+/* enable accelerometer sensor and FIFO write */
+static int inv_icm42607_accel_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ unsigned int fifo_en = 0;
+ unsigned int sleep_temp = 0;
+ unsigned int sleep_accel = 0;
+ unsigned int sleep;
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ if (*scan_mask & INV_ICM42607_SCAN_MASK_TEMP) {
+ /* enable temp sensor */
+ ret = inv_icm42607_set_temp_conf(st, true, &sleep_temp);
+ if (ret)
+ goto out_unlock;
+ fifo_en |= INV_ICM42607_SENSOR_TEMP;
+ }
+
+ if (*scan_mask & INV_ICM42607_SCAN_MASK_ACCEL_3AXIS) {
+ /* enable accel sensor */
+ conf.mode = accel_st->power_mode;
+ conf.filter = accel_st->filter;
+ ret = inv_icm42607_set_accel_conf(st, &conf, &sleep_accel);
+ if (ret)
+ goto out_unlock;
+ fifo_en |= INV_ICM42607_SENSOR_ACCEL;
+ }
+
+ /* update data FIFO write */
+ ret = inv_icm42607_buffer_set_fifo_en(st, fifo_en | st->fifo.en);
+
+out_unlock:
+ mutex_unlock(&st->lock);
+ /* sleep maximum required time */
+ sleep = max(sleep_accel, sleep_temp);
+ if (sleep)
+ msleep(sleep);
+ return ret;
+}
+
+static int inv_icm42607_accel_read_sensor(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ s16 *val)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ struct device *dev = regmap_get_device(st->map);
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ unsigned int reg;
+ __be16 *data;
+ int ret;
+
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ switch (chan->channel2) {
+ case IIO_MOD_X:
+ reg = INV_ICM42607_REG_ACCEL_DATA_X1;
+ break;
+ case IIO_MOD_Y:
+ reg = INV_ICM42607_REG_ACCEL_DATA_Y1;
+ break;
+ case IIO_MOD_Z:
+ reg = INV_ICM42607_REG_ACCEL_DATA_Z1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ /* enable accel sensor */
+ conf.mode = accel_st->power_mode;
+ conf.filter = accel_st->filter;
+ ret = inv_icm42607_set_accel_conf(st, &conf, NULL);
+ if (ret)
+ return ret;
+
+ /* read accel register data */
+ data = (__be16 *)&st->buffer[0];
+ ret = regmap_bulk_read(st->map, reg, data, sizeof(*data));
+ if (ret)
+ return ret;
+
+ *val = (int16_t)be16_to_cpup(data);
+ if (*val == INV_ICM42607_DATA_INVALID)
+ ret = -EINVAL;
+
+ return ret;
+}
+
+/* IIO format int + nano */
+static const int inv_icm42607_accel_scale[] = {
+ /* +/- 16G => 0.004788403 m/s-2 */
+ [2 * INV_ICM42607_ACCEL_FS_16G] = 0,
+ [2 * INV_ICM42607_ACCEL_FS_16G + 1] = 4788403,
+ /* +/- 8G => 0.002394202 m/s-2 */
+ [2 * INV_ICM42607_ACCEL_FS_8G] = 0,
+ [2 * INV_ICM42607_ACCEL_FS_8G + 1] = 2394202,
+ /* +/- 4G => 0.001197101 m/s-2 */
+ [2 * INV_ICM42607_ACCEL_FS_4G] = 0,
+ [2 * INV_ICM42607_ACCEL_FS_4G + 1] = 1197101,
+ /* +/- 2G => 0.000598550 m/s-2 */
+ [2 * INV_ICM42607_ACCEL_FS_2G] = 0,
+ [2 * INV_ICM42607_ACCEL_FS_2G + 1] = 598550,
+};
+
+static int inv_icm42607_accel_read_scale(struct iio_dev *indio_dev,
+ int *val, int *val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ unsigned int idx;
+
+ idx = st->conf.accel.fs;
+
+ *val = accel_st->scales[2 * idx];
+ *val2 = accel_st->scales[2 * idx + 1];
+ return IIO_VAL_INT_PLUS_NANO;
+}
+
+static int inv_icm42607_accel_write_scale(struct iio_dev *indio_dev,
+ int val, int val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int idx;
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ int ret;
+
+ for (idx = 0; idx < accel_st->scales_len; idx += 2) {
+ if (val == accel_st->scales[idx] &&
+ val2 == accel_st->scales[idx + 1])
+ break;
+ }
+ if (idx >= accel_st->scales_len)
+ return -EINVAL;
+
+ conf.fs = idx / 2;
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_set_accel_conf(st, &conf, NULL);
+
+ return ret;
+}
+
+/* IIO format int + micro */
+static const int inv_icm42607_accel_odr[] = {
+ /* 1.5625Hz */
+ 1, 562500,
+ /* 3.125Hz */
+ 3, 125000,
+ /* 6.25Hz */
+ 6, 250000,
+ /* 12.5Hz */
+ 12, 500000,
+ /* 25Hz */
+ 25, 0,
+ /* 50Hz */
+ 50, 0,
+ /* 100Hz */
+ 100, 0,
+ /* 200Hz */
+ 200, 0,
+ /* 400Hz */
+ 400, 0,
+ /* 800Hz */
+ 800, 0,
+ /* 1600Hz */
+ 1600, 0,
+};
+
+static const int inv_icm42607_accel_odr_conv[] = {
+ INV_ICM42607_ODR_1_5625HZ_LP,
+ INV_ICM42607_ODR_3_125HZ_LP,
+ INV_ICM42607_ODR_6_25HZ_LP,
+ INV_ICM42607_ODR_12_5HZ,
+ INV_ICM42607_ODR_25HZ,
+ INV_ICM42607_ODR_50HZ,
+ INV_ICM42607_ODR_100HZ,
+ INV_ICM42607_ODR_200HZ,
+ INV_ICM42607_ODR_400HZ,
+ INV_ICM42607_ODR_800HZ,
+ INV_ICM42607_ODR_1600HZ,
+};
+
+static int inv_icm42607_accel_read_odr(struct inv_icm42607_state *st,
+ int *val, int *val2)
+{
+ unsigned int odr;
+ unsigned int i;
+
+ odr = st->conf.accel.odr;
+
+ for (i = 0; i < ARRAY_SIZE(inv_icm42607_accel_odr_conv); ++i) {
+ if (inv_icm42607_accel_odr_conv[i] == odr)
+ break;
+ }
+ if (i >= ARRAY_SIZE(inv_icm42607_accel_odr_conv))
+ return -EINVAL;
+
+ *val = inv_icm42607_accel_odr[2 * i];
+ *val2 = inv_icm42607_accel_odr[2 * i + 1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int inv_icm42607_accel_write_odr(struct iio_dev *indio_dev,
+ int val, int val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ struct inv_sensors_timestamp *ts = &accel_st->ts;
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int idx;
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ int ret;
+
+ for (idx = 0; idx < ARRAY_SIZE(inv_icm42607_accel_odr); idx += 2) {
+ if (val == inv_icm42607_accel_odr[idx] &&
+ val2 == inv_icm42607_accel_odr[idx + 1])
+ break;
+ }
+ if (idx >= ARRAY_SIZE(inv_icm42607_accel_odr))
+ return -EINVAL;
+
+ conf.odr = inv_icm42607_accel_odr_conv[idx / 2];
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_sensors_timestamp_update_odr(ts, inv_icm42607_odr_to_period(conf.odr),
+ iio_buffer_enabled(indio_dev));
+ if (ret)
+ return ret;
+
+ ret = inv_icm42607_set_accel_conf(st, &conf, NULL);
+ if (ret)
+ return ret;
+
+ inv_icm42607_buffer_update_fifo_period(st);
+ inv_icm42607_buffer_update_watermark(st);
+
+ return ret;
+}
+
+/*
+ * Calibration bias values, IIO range format int + micro.
+ * Not actually supported in the ICM-42607P registers.
+ */
+static int inv_icm42607_accel_write_calibbias(struct inv_icm42607_state *st,
+ struct iio_chan_spec const *chan,
+ int val, int val2)
+{
+ /* Not actually supported in the ICM-42607P registers */
+ return -EOPNOTSUPP;
+}
+
+static int inv_icm42607_accel_read_calibbias(struct inv_icm42607_state *st,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2)
+{
+ /* Not actually supported in the ICM-42607P registers */
+ return -EOPNOTSUPP;
+}
+
+static int inv_icm42607_accel_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ s16 data;
+ int ret;
+
+ switch (chan->type) {
+ case IIO_ACCEL:
+ break;
+ case IIO_TEMP:
+ return inv_icm42607_temp_read_raw(indio_dev, chan, val, val2, mask);
+ default:
+ return -EINVAL;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_accel_read_sensor(indio_dev, chan, &data);
+ iio_device_release_direct(indio_dev);
+ if (ret)
+ return ret;
+ *val = data;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ return inv_icm42607_accel_read_scale(indio_dev, val, val2);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return inv_icm42607_accel_read_odr(st, val, val2);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return inv_icm42607_accel_read_calibbias(st, chan, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_icm42607_accel_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_accel_write_scale(indio_dev, val, val2);
+ iio_device_release_direct(indio_dev);
+ return ret;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return inv_icm42607_accel_write_odr(indio_dev, val, val2);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_accel_write_calibbias(st, chan, val, val2);
+ iio_device_release_direct(indio_dev);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_icm42607_accel_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long mask)
+{
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_icm42607_accel_hwfifo_set_watermark(struct iio_dev *indio_dev,
+ unsigned int val)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+
+ guard(mutex)(&st->lock);
+
+ st->fifo.watermark.accel = val;
+ return inv_icm42607_buffer_update_watermark(st);
+}
+
+static int inv_icm42607_accel_hwfifo_flush(struct iio_dev *indio_dev,
+ unsigned int count)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ if (count == 0)
+ return 0;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_buffer_hwfifo_flush(st, count);
+ if (ret)
+ return ret;
+
+ return st->fifo.nb.accel;
+}
+
+static const struct iio_info inv_icm42607_accel_info = {
+ .read_raw = inv_icm42607_accel_read_raw,
+ .write_raw = inv_icm42607_accel_write_raw,
+ .write_raw_get_fmt = inv_icm42607_accel_write_raw_get_fmt,
+ .debugfs_reg_access = inv_icm42607_debugfs_reg,
+ .update_scan_mode = inv_icm42607_accel_update_scan_mode,
+ .hwfifo_set_watermark = inv_icm42607_accel_hwfifo_set_watermark,
+ .hwfifo_flush_to_buffer = inv_icm42607_accel_hwfifo_flush,
+};
+
+struct iio_dev *inv_icm42607_accel_init(struct inv_icm42607_state *st)
+{
+ struct device *dev = regmap_get_device(st->map);
+ const char *name;
+ struct inv_icm42607_sensor_state *accel_st;
+ struct inv_sensors_timestamp_chip ts_chip;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ name = devm_kasprintf(dev, GFP_KERNEL, "%s-accel", st->name);
+ if (!name)
+ return ERR_PTR(-ENOMEM);
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*accel_st));
+ if (!indio_dev)
+ return ERR_PTR(-ENOMEM);
+ accel_st = iio_priv(indio_dev);
+
+ accel_st->scales = inv_icm42607_accel_scale;
+ accel_st->scales_len = ARRAY_SIZE(inv_icm42607_accel_scale);
+ accel_st->power_mode = INV_ICM42607_SENSOR_MODE_LOW_POWER;
+ accel_st->filter = INV_ICM42607_FILTER_AVG_16X;
+
+ /*
+ * clock period is 32kHz (31250ns)
+ * jitter is +/- 2% (20 per mille)
+ */
+ ts_chip.clock_period = 31250;
+ ts_chip.jitter = 20;
+ ts_chip.init_period = inv_icm42607_odr_to_period(st->conf.accel.odr);
+ inv_sensors_timestamp_init(&accel_st->ts, &ts_chip);
+
+ iio_device_set_drvdata(indio_dev, st);
+ indio_dev->name = name;
+ indio_dev->info = &inv_icm42607_accel_info;
+ indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+ indio_dev->channels = inv_icm42607_accel_channels;
+ indio_dev->num_channels = ARRAY_SIZE(inv_icm42607_accel_channels);
+ indio_dev->available_scan_masks = inv_icm42607_accel_scan_masks;
+
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+ &inv_icm42607_buffer_ops);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = devm_iio_device_register(dev, indio_dev);
+ if (ret)
+ return ERR_PTR(ret);
+
+ /* accel events are wakeup capable */
+ ret = devm_device_init_wakeup(&indio_dev->dev);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return indio_dev;
+}
+
+int inv_icm42607_accel_parse_fifo(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ struct inv_sensors_timestamp *ts = &accel_st->ts;
+ ssize_t i, size;
+ unsigned int no;
+ const void *accel, *gyro, *timestamp;
+ const int8_t *temp;
+ unsigned int odr;
+ int64_t ts_val;
+ struct inv_icm42607_accel_buffer buffer = { };
+
+ /* parse all fifo packets */
+ for (i = 0, no = 0; i < st->fifo.count; i += size, ++no) {
+ size = inv_icm42607_fifo_decode_packet(&st->fifo.data[i],
+ &accel, &gyro, &temp, ×tamp, &odr);
+ /* quit if error or FIFO is empty */
+ if (size <= 0)
+ return size;
+
+ /* skip packet if no accel data or data is invalid */
+ if (accel == NULL || !inv_icm42607_fifo_is_data_valid(accel))
+ continue;
+
+ /* update odr */
+ if (odr & INV_ICM42607_SENSOR_ACCEL) {
+ inv_sensors_timestamp_apply_odr(ts, st->fifo.period,
+ st->fifo.nb.total, no);
+ }
+
+ memcpy(&buffer.accel, accel, sizeof(buffer.accel));
+ /* convert 8 bits FIFO temperature in high resolution format */
+ buffer.temp = temp ? (*temp * 64) : 0;
+ ts_val = inv_sensors_timestamp_pop(ts);
+ iio_push_to_buffers_with_timestamp(indio_dev, &buffer, ts_val);
+ }
+
+ return 0;
+}
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
index 4f5f199586fc..b086068e56ce 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
@@ -356,6 +356,7 @@ static int inv_icm42607_buffer_postdisable(struct iio_dev *indio_dev)
struct device *dev = regmap_get_device(st->map);
unsigned int sensor;
unsigned int *watermark;
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
unsigned int sleep_temp = 0;
unsigned int sleep_sensor = 0;
unsigned int sleep;
@@ -382,6 +383,15 @@ static int inv_icm42607_buffer_postdisable(struct iio_dev *indio_dev)
if (ret)
goto out_unlock;
+ conf.mode = INV_ICM42607_SENSOR_MODE_OFF;
+ ret = inv_icm42607_set_accel_conf(st, &conf, &sleep_sensor);
+ if (ret)
+ goto out_unlock;
+
+ /* if FIFO is off, turn temperature off */
+ if (!st->fifo.on)
+ ret = inv_icm42607_set_temp_conf(st, false, &sleep_temp);
+
out_unlock:
mutex_unlock(&st->lock);
@@ -461,9 +471,33 @@ int inv_icm42607_buffer_fifo_read(struct inv_icm42607_state *st,
return 0;
}
+int inv_icm42607_buffer_fifo_parse(struct inv_icm42607_state *st)
+{
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(st->indio_accel);
+ struct inv_sensors_timestamp *ts;
+ int ret;
+
+ if (st->fifo.nb.total == 0)
+ return 0;
+
+ /* handle accelerometer timestamp and FIFO data parsing */
+ if (st->fifo.nb.accel > 0) {
+ ts = &accel_st->ts;
+ inv_sensors_timestamp_interrupt(ts, st->fifo.watermark.eff_accel,
+ st->timestamp.accel);
+ ret = inv_icm42607_accel_parse_fifo(st->indio_accel);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
unsigned int count)
{
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(st->indio_accel);
+ struct inv_sensors_timestamp *ts;
s64 gyro_ts, accel_ts;
int ret;
@@ -471,8 +505,21 @@ int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
accel_ts = iio_get_time_ns(st->indio_accel);
ret = inv_icm42607_buffer_fifo_read(st, count);
+ if (ret)
+ return ret;
- return ret;
+ if (st->fifo.nb.total == 0)
+ return 0;
+
+ if (st->fifo.nb.accel > 0) {
+ ts = &accel_st->ts;
+ inv_sensors_timestamp_interrupt(ts, st->fifo.nb.accel, accel_ts);
+ ret = inv_icm42607_accel_parse_fifo(st->indio_accel);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
}
int inv_icm42607_buffer_init(struct inv_icm42607_state *st)
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h
index 64a66c00a861..6d8d7fa7bd13 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.h
@@ -92,6 +92,8 @@ int inv_icm42607_buffer_update_watermark(struct inv_icm42607_state *st);
int inv_icm42607_buffer_fifo_read(struct inv_icm42607_state *st,
unsigned int max);
+int inv_icm42607_buffer_fifo_parse(struct inv_icm42607_state *st);
+
int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
unsigned int count);
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
index 735a262dc103..62a1371b0c4a 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -76,6 +76,15 @@ static const struct inv_icm42607_hw inv_icm42607_hw[INV_CHIP_NB] = {
},
};
+const struct iio_mount_matrix *
+inv_icm42607_get_mount_matrix(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ const struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+
+ return &st->orientation;
+}
+
u32 inv_icm42607_odr_to_period(enum inv_icm42607_odr odr)
{
static u32 odr_periods[INV_ICM42607_ODR_NB] = {
@@ -164,6 +173,52 @@ static int inv_icm42607_set_pwr_mgmt0(struct inv_icm42607_state *st,
return 0;
}
+int inv_icm42607_set_accel_conf(struct inv_icm42607_state *st,
+ struct inv_icm42607_sensor_conf *conf,
+ unsigned int *sleep_ms)
+{
+ struct inv_icm42607_sensor_conf *oldconf = &st->conf.accel;
+ unsigned int val;
+ int ret;
+
+ if (conf->mode < 0)
+ conf->mode = oldconf->mode;
+ if (conf->fs < 0)
+ conf->fs = oldconf->fs;
+ if (conf->odr < 0)
+ conf->odr = oldconf->odr;
+ if (conf->filter < 0)
+ conf->filter = oldconf->filter;
+
+ if (conf->fs != oldconf->fs || conf->odr != oldconf->odr) {
+ val = INV_ICM42607_ACCEL_CONFIG0_FS_SEL(conf->fs) |
+ INV_ICM42607_ACCEL_CONFIG0_ODR(conf->odr);
+ ret = regmap_write(st->map, INV_ICM42607_REG_ACCEL_CONFIG0, val);
+ if (ret)
+ return ret;
+ oldconf->fs = conf->fs;
+ oldconf->odr = conf->odr;
+ }
+
+ if (conf->filter != oldconf->filter) {
+ if (conf->mode == INV_ICM42607_SENSOR_MODE_LOW_POWER) {
+ val = INV_ICM42607_ACCEL_CONFIG1_AVG(conf->filter);
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_ACCEL_CONFIG1,
+ INV_ICM42607_ACCEL_CONFIG1_AVG_MASK, val);
+ } else {
+ val = INV_ICM42607_ACCEL_CONFIG1_FILTER(conf->filter);
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_ACCEL_CONFIG1,
+ INV_ICM42607_ACCEL_CONFIG1_FILTER_MASK, val);
+ }
+ if (ret)
+ return ret;
+ oldconf->filter = conf->filter;
+ }
+
+ return inv_icm42607_set_pwr_mgmt0(st, st->conf.gyro.mode, conf->mode,
+ st->conf.temp_en, sleep_ms);
+}
+
int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
unsigned int *sleep_ms)
{
@@ -396,6 +451,11 @@ int inv_icm42607_core_probe(struct regmap *regmap, int chip,
if (ret)
return ret;
+ /* Initialize IIO device for Accel */
+ st->indio_accel = inv_icm42607_accel_init(st);
+ if (IS_ERR(st->indio_accel))
+ return PTR_ERR(st->indio_accel);
+
/* Setup runtime power management */
ret = devm_pm_runtime_set_active_enabled(dev);
if (ret)
--
2.43.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 7/9] iio: imu: inv_icm42607: Add Interrupt and Wake on Movement for icm42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (5 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 6/9] iio: imu: inv_icm42607: Add Accelerometer for icm42607 Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 8/9] iio: imu: inv_icm42607: Add Gyroscope to icm42607 Chris Morgan
` (2 subsequent siblings)
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add support for wake on movement for the icm42607 driver.
At this point the driver is usable as an accelerometer/temperature
driver, so add the necessary Makefile and Kconfig changes as well.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/Kconfig | 1 +
drivers/iio/imu/Makefile | 1 +
drivers/iio/imu/inv_icm42607/Kconfig | 30 ++
drivers/iio/imu/inv_icm42607/Makefile | 13 +
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 7 +
.../iio/imu/inv_icm42607/inv_icm42607_accel.c | 303 ++++++++++++++++++
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 155 +++++++++
7 files changed, 510 insertions(+)
create mode 100644 drivers/iio/imu/inv_icm42607/Kconfig
create mode 100644 drivers/iio/imu/inv_icm42607/Makefile
diff --git a/drivers/iio/imu/Kconfig b/drivers/iio/imu/Kconfig
index 7e0181c27bb6..8bab4616be20 100644
--- a/drivers/iio/imu/Kconfig
+++ b/drivers/iio/imu/Kconfig
@@ -109,6 +109,7 @@ config KMX61
be called kmx61.
source "drivers/iio/imu/inv_icm42600/Kconfig"
+source "drivers/iio/imu/inv_icm42607/Kconfig"
source "drivers/iio/imu/inv_icm45600/Kconfig"
source "drivers/iio/imu/inv_mpu6050/Kconfig"
diff --git a/drivers/iio/imu/Makefile b/drivers/iio/imu/Makefile
index 13fb7846e9c9..3268dc2371ae 100644
--- a/drivers/iio/imu/Makefile
+++ b/drivers/iio/imu/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_FXOS8700_I2C) += fxos8700_i2c.o
obj-$(CONFIG_FXOS8700_SPI) += fxos8700_spi.o
obj-y += inv_icm42600/
+obj-y += inv_icm42607/
obj-y += inv_icm45600/
obj-y += inv_mpu6050/
diff --git a/drivers/iio/imu/inv_icm42607/Kconfig b/drivers/iio/imu/inv_icm42607/Kconfig
new file mode 100644
index 000000000000..b7c533d1a6be
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/Kconfig
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+config INV_ICM42607
+ tristate
+ select IIO_BUFFER
+ select IIO_INV_SENSORS_TIMESTAMP
+
+config INV_ICM42607_I2C
+ tristate "InvenSense ICM-42607X I2C driver"
+ depends on I2C
+ select INV_ICM42607
+ select REGMAP_I2C
+ help
+ This driver supports the InvenSense ICM-42607 motion tracking
+ device over I2C.
+
+ This driver can be built as a module. The module will be called
+ inv-icm42607-i2c.
+
+config INV_ICM42607_SPI
+ tristate "InvenSense ICM-42607X SPI driver"
+ depends on SPI_MASTER
+ select INV_ICM42607
+ select REGMAP_SPI
+ help
+ This driver supports the InvenSense ICM-42607 motion tracking
+ device over SPI.
+
+ This driver can be built as a module. The module will be called
+ inv-icm42607-spi.
diff --git a/drivers/iio/imu/inv_icm42607/Makefile b/drivers/iio/imu/inv_icm42607/Makefile
new file mode 100644
index 000000000000..e908d77c4219
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+obj-$(CONFIG_INV_ICM42607) += inv-icm42607.o
+inv-icm42607-y += inv_icm42607_core.o
+inv-icm42607-y += inv_icm42607_accel.o
+inv-icm42607-y += inv_icm42607_buffer.o
+inv-icm42607-y += inv_icm42607_temp.o
+
+obj-$(CONFIG_INV_ICM42607_I2C) += inv-icm42607-i2c.o
+inv-icm42607-i2c-y += inv_icm42607_i2c.o
+
+obj-$(CONFIG_INV_ICM42607_SPI) += inv-icm42607-spi.o
+inv-icm42607-spi-y += inv_icm42607_spi.o
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
index 56bb09e2c304..f5f1b5fea183 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -444,6 +444,9 @@ int inv_icm42607_set_accel_conf(struct inv_icm42607_state *st,
int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
unsigned int *sleep_ms);
+int inv_icm42607_enable_wom(struct inv_icm42607_state *st);
+int inv_icm42607_disable_wom(struct inv_icm42607_state *st);
+
int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
unsigned int writeval, unsigned int *readval);
@@ -454,4 +457,8 @@ struct iio_dev *inv_icm42607_accel_init(struct inv_icm42607_state *st);
int inv_icm42607_accel_parse_fifo(struct iio_dev *indio_dev);
+void inv_icm42607_accel_handle_events(struct iio_dev *indio_dev,
+ unsigned int status2, unsigned int status3,
+ s64 timestamp);
+
#endif
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c
index 58754af31100..2f62e7b1cff5 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_accel.c
@@ -174,6 +174,16 @@ static const struct iio_chan_spec_ext_info inv_icm42607_accel_ext_infos[] = {
{ },
};
+/* WoM event: rising ROC */
+static const struct iio_event_spec inv_icm42607_wom_events[] = {
+ {
+ .type = IIO_EV_TYPE_ROC,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_VALUE),
+ },
+};
+
static const struct iio_chan_spec inv_icm42607_accel_channels[] = {
INV_ICM42607_ACCEL_CHAN(IIO_MOD_X, INV_ICM42607_ACCEL_SCAN_X,
inv_icm42607_accel_ext_infos),
@@ -183,6 +193,8 @@ static const struct iio_chan_spec inv_icm42607_accel_channels[] = {
inv_icm42607_accel_ext_infos),
INV_ICM42607_TEMP_CHAN(INV_ICM42607_ACCEL_SCAN_TEMP),
IIO_CHAN_SOFT_TIMESTAMP(INV_ICM42607_ACCEL_SCAN_TIMESTAMP),
+ INV_ICM42607_ACCEL_EVENT_CHAN(IIO_MOD_X_OR_Y_OR_Z, inv_icm42607_wom_events,
+ ARRAY_SIZE(inv_icm42607_wom_events)),
};
static const struct iio_event_spec inv_icm42607_motion_events[] = {
@@ -316,6 +328,180 @@ static int inv_icm42607_accel_read_sensor(struct iio_dev *indio_dev,
return ret;
}
+static unsigned int inv_icm42607_accel_convert_roc_to_wom(u64 roc,
+ int accel_hz, int accel_uhz)
+{
+ /* 1000/256mg per LSB converted in µm/s² */
+ const unsigned int convert = (9807U * (MICRO / MILLI)) / 256U;
+ u64 value;
+ u64 freq_uhz;
+
+ /* return 0 only if roc is 0 */
+ if (roc == 0)
+ return 0;
+
+ freq_uhz = (u64)accel_hz * MICRO + (u64)accel_uhz;
+ value = div64_u64(roc * MICRO, freq_uhz * (u64)convert);
+
+ /* limit value to 8 bits and prevent 0 */
+ return clamp(value, 1, 255);
+}
+
+static u64 inv_icm42607_accel_convert_wom_to_roc(unsigned int threshold,
+ int accel_hz, int accel_uhz)
+{
+ /* 1000/256mg per LSB converted in µm/s² */
+ const unsigned int convert = (9807U * (MICRO / MILLI)) / 256U;
+ u64 value;
+ u64 freq_uhz;
+
+ value = threshold * convert;
+ freq_uhz = (u64)accel_hz * MICRO + (u64)accel_uhz;
+
+ /* compute the differential by multiplying by the frequency */
+ return div_u64(value * freq_uhz, MICRO);
+}
+
+static int inv_icm42607_accel_set_wom_threshold(struct inv_icm42607_state *st,
+ u64 value,
+ int accel_hz, int accel_uhz)
+{
+ unsigned int threshold;
+ int ret;
+
+ /* convert roc to wom threshold and convert back to handle clipping */
+ threshold = inv_icm42607_accel_convert_roc_to_wom(value, accel_hz, accel_uhz);
+ value = inv_icm42607_accel_convert_wom_to_roc(threshold, accel_hz, accel_uhz);
+
+ dev_dbg(regmap_get_device(st->map), "wom_threshold: 0x%x\n", threshold);
+
+ /* set accel WoM threshold for the 3 axes */
+ st->buffer[0] = threshold;
+ st->buffer[1] = threshold;
+ st->buffer[2] = threshold;
+ ret = regmap_bulk_write(st->map, INV_ICM42607_REG_ACCEL_WOM_X_THR, st->buffer, 3);
+ if (ret)
+ return ret;
+
+ st->apex.wom.value = value;
+
+ return 0;
+}
+
+static int _inv_icm42607_accel_enable_wom(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *accel_st = iio_priv(indio_dev);
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ unsigned int sleep_ms = 0;
+ int ret;
+
+ scoped_guard(mutex, &st->lock) {
+ /* turn on accel sensor */
+ conf.mode = accel_st->power_mode;
+ conf.filter = accel_st->filter;
+ ret = inv_icm42607_set_accel_conf(st, &conf, &sleep_ms);
+ if (ret)
+ return ret;
+ }
+
+ if (sleep_ms)
+ msleep(sleep_ms);
+
+ scoped_guard(mutex, &st->lock) {
+ ret = inv_icm42607_enable_wom(st);
+ if (ret)
+ return ret;
+ st->apex.on++;
+ st->apex.wom.enable = true;
+ }
+
+ return 0;
+}
+
+static int inv_icm42607_accel_enable_wom(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct device *pdev = regmap_get_device(st->map);
+ int ret;
+
+ ret = pm_runtime_resume_and_get(pdev);
+ if (ret)
+ return ret;
+
+ ret = _inv_icm42607_accel_enable_wom(indio_dev);
+ if (ret) {
+ pm_runtime_mark_last_busy(pdev);
+ pm_runtime_put_autosuspend(pdev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int _inv_icm42607_accel_disable_wom(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ unsigned int sleep_ms = 0;
+ int ret;
+
+ scoped_guard(mutex, &st->lock) {
+ /*
+ * Consider that turning off WoM is always working to avoid
+ * blocking the chip in on mode and prevent going back to sleep.
+ * If there is an error, the chip will anyway go back to sleep
+ * and the feature will not work anymore.
+ */
+ st->apex.wom.enable = false;
+ st->apex.on--;
+ ret = inv_icm42607_disable_wom(st);
+ if (ret)
+ return ret;
+ /* turn off accel sensor if not used */
+ if (!st->apex.on && !iio_buffer_enabled(indio_dev)) {
+ conf.mode = INV_ICM42607_SENSOR_MODE_OFF;
+ ret = inv_icm42607_set_accel_conf(st, &conf, &sleep_ms);
+ if (ret)
+ return ret;
+ }
+ }
+
+ if (sleep_ms)
+ msleep(sleep_ms);
+
+ return 0;
+}
+
+static int inv_icm42607_accel_disable_wom(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct device *pdev = regmap_get_device(st->map);
+ int ret;
+
+ ret = _inv_icm42607_accel_disable_wom(indio_dev);
+
+ pm_runtime_mark_last_busy(pdev);
+ pm_runtime_put_autosuspend(pdev);
+
+ return ret;
+}
+
+void inv_icm42607_accel_handle_events(struct iio_dev *indio_dev,
+ unsigned int status2, unsigned int status3,
+ s64 timestamp)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ u64 ev_code;
+
+ /* handle WoM event */
+ if (st->apex.wom.enable && (status2 & INV_ICM42607_INT_STATUS2_WOM_INT)) {
+ ev_code = IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
+ IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING);
+ iio_push_event(indio_dev, ev_code, timestamp);
+ }
+}
+
/* IIO format int + nano */
static const int inv_icm42607_accel_scale[] = {
/* +/- 16G => 0.004788403 m/s-2 */
@@ -471,6 +657,9 @@ static int inv_icm42607_accel_write_odr(struct iio_dev *indio_dev,
return ret;
ret = inv_icm42607_set_accel_conf(st, &conf, NULL);
+ if (ret)
+ return ret;
+ ret = inv_icm42607_accel_set_wom_threshold(st, st->apex.wom.value, val, val2);
if (ret)
return ret;
@@ -616,6 +805,116 @@ static int inv_icm42607_accel_hwfifo_flush(struct iio_dev *indio_dev,
return st->fifo.nb.accel;
}
+static int inv_icm42607_accel_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+
+ /* handle only WoM (roc rising) event */
+ if (type != IIO_EV_TYPE_ROC || dir != IIO_EV_DIR_RISING)
+ return -EINVAL;
+
+ guard(mutex)(&st->lock);
+
+ return st->apex.wom.enable ? 1 : 0;
+}
+
+static int inv_icm42607_accel_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ bool state)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+
+ /* handle only WoM (roc rising) event */
+ if (type != IIO_EV_TYPE_ROC || dir != IIO_EV_DIR_RISING)
+ return -EINVAL;
+
+ scoped_guard(mutex, &st->lock) {
+ if (st->apex.wom.enable == state)
+ return 0;
+ }
+
+ if (state)
+ return inv_icm42607_accel_enable_wom(indio_dev);
+
+ return inv_icm42607_accel_disable_wom(indio_dev);
+}
+
+static int inv_icm42607_accel_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ u32 rem;
+
+ /* handle only WoM (roc rising) event value */
+ if (type != IIO_EV_TYPE_ROC || dir != IIO_EV_DIR_RISING)
+ return -EINVAL;
+
+ guard(mutex)(&st->lock);
+
+ /* return value in micro */
+ *val = div_u64_rem(st->apex.wom.value, MICRO, &rem);
+ *val2 = rem;
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int _inv_icm42607_accel_wom_value(struct inv_icm42607_state *st,
+ int val, int val2)
+{
+ u64 value;
+ unsigned int accel_hz, accel_uhz;
+ int ret;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_accel_read_odr(st, &accel_hz, &accel_uhz);
+ if (ret < 0)
+ return ret;
+
+ value = (u64)val * MICRO + (u64)val2;
+
+ return inv_icm42607_accel_set_wom_threshold(st, value,
+ accel_hz, accel_uhz);
+}
+
+static int inv_icm42607_accel_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct device *dev = regmap_get_device(st->map);
+ int ret;
+
+ /* handle only WoM (roc rising) event value */
+ if (type != IIO_EV_TYPE_ROC || dir != IIO_EV_DIR_RISING)
+ return -EINVAL;
+
+ if (val < 0 || val2 < 0)
+ return -EINVAL;
+
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ return ret;
+
+ ret = _inv_icm42607_accel_wom_value(st, val, val2);
+
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+
static const struct iio_info inv_icm42607_accel_info = {
.read_raw = inv_icm42607_accel_read_raw,
.write_raw = inv_icm42607_accel_write_raw,
@@ -624,6 +923,10 @@ static const struct iio_info inv_icm42607_accel_info = {
.update_scan_mode = inv_icm42607_accel_update_scan_mode,
.hwfifo_set_watermark = inv_icm42607_accel_hwfifo_set_watermark,
.hwfifo_flush_to_buffer = inv_icm42607_accel_hwfifo_flush,
+ .read_event_config = inv_icm42607_accel_read_event_config,
+ .write_event_config = inv_icm42607_accel_write_event_config,
+ .read_event_value = inv_icm42607_accel_read_event_value,
+ .write_event_value = inv_icm42607_accel_write_event_value,
};
struct iio_dev *inv_icm42607_accel_init(struct inv_icm42607_state *st)
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
index 62a1371b0c4a..4ac3af52c1b8 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -236,6 +236,39 @@ int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
sleep_ms);
}
+int inv_icm42607_enable_wom(struct inv_icm42607_state *st)
+{
+ int ret;
+
+ /* enable WoM hardware */
+ ret = regmap_write(st->map, INV_ICM42607_REG_WOM_CONFIG,
+ INV_ICM42607_WOM_CONFIG_INT_DUR(1) |
+ INV_ICM42607_WOM_CONFIG_MODE |
+ INV_ICM42607_WOM_CONFIG_EN);
+ if (ret)
+ return ret;
+
+ /* enable WoM interrupt */
+ return regmap_set_bits(st->map, INV_ICM42607_REG_INT_SOURCE1,
+ INV_ICM42607_INT_SOURCE1_WOM_INT1_EN);
+}
+
+int inv_icm42607_disable_wom(struct inv_icm42607_state *st)
+{
+ int ret;
+
+ /* disable WoM interrupt */
+ ret = regmap_clear_bits(st->map, INV_ICM42607_REG_INT_SOURCE1,
+ INV_ICM42607_INT_SOURCE1_WOM_INT1_EN);
+ if (ret)
+ return ret;
+
+ /* disable WoM hardware */
+ return regmap_clear_bits(st->map, INV_ICM42607_REG_WOM_CONFIG,
+ INV_ICM42607_WOM_CONFIG_EN);
+}
+
+
int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
unsigned int writeval, unsigned int *readval)
{
@@ -353,6 +386,110 @@ static int inv_icm42607_setup(struct inv_icm42607_state *st,
return inv_icm42607_set_conf(st, hw->conf);
}
+static irqreturn_t inv_icm42607_irq_timestamp(int irq, void *_data)
+{
+ struct inv_icm42607_state *st = _data;
+
+ st->timestamp.gyro = iio_get_time_ns(st->indio_gyro);
+ st->timestamp.accel = iio_get_time_ns(st->indio_accel);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t inv_icm42607_irq_handler(int irq, void *_data)
+{
+ struct inv_icm42607_state *st = _data;
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int status;
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ if (st->apex.on) {
+ unsigned int status2, status3;
+
+ /* read INT_STATUS2 and INT_STATUS3 in 1 operation */
+ ret = regmap_bulk_read(st->map, INV_ICM42607_REG_INT_STATUS2, st->buffer, 2);
+ if (ret)
+ goto out_unlock;
+ status2 = st->buffer[0];
+ status3 = st->buffer[1];
+ inv_icm42607_accel_handle_events(st->indio_accel, status2, status3,
+ st->timestamp.accel);
+ }
+
+ ret = regmap_read(st->map, INV_ICM42607_REG_INT_STATUS, &status);
+ if (ret)
+ goto out_unlock;
+
+ if (status & INV_ICM42607_INT_STATUS_FIFO_FULL)
+ dev_warn(dev, "FIFO full data lost!\n");
+
+ if (status & INV_ICM42607_INT_STATUS_FIFO_THS) {
+ ret = inv_icm42607_buffer_fifo_read(st, 0);
+ if (ret) {
+ dev_err(dev, "FIFO read error %d\n", ret);
+ goto out_unlock;
+ }
+ ret = inv_icm42607_buffer_fifo_parse(st);
+ if (ret)
+ dev_err(dev, "FIFO parsing error %d\n", ret);
+ }
+
+out_unlock:
+ mutex_unlock(&st->lock);
+ return IRQ_HANDLED;
+}
+
+/**
+ * inv_icm42607_irq_init() - initialize int pin and interrupt handler
+ * @st: driver internal state
+ * @irq: irq number
+ * @irq_type: irq trigger type
+ * @open_drain: true if irq is open drain, false for push-pull
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ */
+static int inv_icm42607_irq_init(struct inv_icm42607_state *st, int irq,
+ int irq_type, bool open_drain)
+{
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int val = 0;
+ int ret;
+
+ switch (irq_type) {
+ case IRQF_TRIGGER_RISING:
+ case IRQF_TRIGGER_HIGH:
+ val = INV_ICM42607_INT_CONFIG_INT1_ACTIVE_HIGH;
+ break;
+ default:
+ val = INV_ICM42607_INT_CONFIG_INT1_ACTIVE_LOW;
+ break;
+ }
+
+ switch (irq_type) {
+ case IRQF_TRIGGER_LOW:
+ case IRQF_TRIGGER_HIGH:
+ val |= INV_ICM42607_INT_CONFIG_INT1_LATCHED;
+ break;
+ default:
+ break;
+ }
+
+ if (!open_drain)
+ val |= INV_ICM42607_INT_CONFIG_INT1_PUSH_PULL;
+
+ ret = regmap_write(st->map, INV_ICM42607_REG_INT_CONFIG, val);
+ if (ret)
+ return ret;
+
+ irq_type |= IRQF_ONESHOT;
+ return devm_request_threaded_irq(dev, irq, inv_icm42607_irq_timestamp,
+ inv_icm42607_irq_handler, irq_type,
+ st->name, st);
+}
+
+
static int inv_icm42607_enable_vddio_reg(struct inv_icm42607_state *st)
{
int ret;
@@ -456,6 +593,11 @@ int inv_icm42607_core_probe(struct regmap *regmap, int chip,
if (IS_ERR(st->indio_accel))
return PTR_ERR(st->indio_accel);
+ /* Initialize interrupt handling */
+ ret = inv_icm42607_irq_init(st, irq, irq_type, open_drain);
+ if (ret)
+ return ret;
+
/* Setup runtime power management */
ret = devm_pm_runtime_set_active_enabled(dev);
if (ret)
@@ -504,6 +646,12 @@ static int inv_icm42607_suspend(struct device *dev)
enable_irq_wake(st->irq);
disable_irq(st->irq);
} else {
+ /* disable APEX features and accel if wakeup disabled */
+ if (st->apex.wom.enable) {
+ ret = inv_icm42607_disable_wom(st);
+ if (ret)
+ return ret;
+ }
accel_conf = INV_ICM42607_SENSOR_MODE_OFF;
}
@@ -557,6 +705,13 @@ static int inv_icm42607_resume(struct device *dev)
if (ret)
return ret;
+ /* restore APEX features if disabled */
+ if (!wakeup && st->apex.wom.enable) {
+ ret = inv_icm42607_enable_wom(st);
+ if (ret)
+ return ret;
+ }
+
if (st->fifo.on) {
inv_sensors_timestamp_reset(&gyro_st->ts);
inv_sensors_timestamp_reset(&accel_st->ts);
--
2.43.0
_______________________________________________
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Linux-rockchip@lists.infradead.org
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 8/9] iio: imu: inv_icm42607: Add Gyroscope to icm42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (6 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 7/9] iio: imu: inv_icm42607: Add Interrupt and Wake on Movement " Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-30 19:58 ` [PATCH V3 9/9] arm64: dts: rockchip: Add icm42607p IMU for RG-DS Chris Morgan
2026-03-31 11:25 ` [PATCH V3 0/9] Add Invensense ICM42607 Andy Shevchenko
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add gyroscope functions to the icm42607 driver.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/iio/imu/inv_icm42607/Makefile | 1 +
drivers/iio/imu/inv_icm42607/inv_icm42607.h | 8 +
.../imu/inv_icm42607/inv_icm42607_buffer.c | 25 +-
.../iio/imu/inv_icm42607/inv_icm42607_core.c | 45 ++
.../iio/imu/inv_icm42607/inv_icm42607_gyro.c | 579 ++++++++++++++++++
5 files changed, 657 insertions(+), 1 deletion(-)
create mode 100644 drivers/iio/imu/inv_icm42607/inv_icm42607_gyro.c
diff --git a/drivers/iio/imu/inv_icm42607/Makefile b/drivers/iio/imu/inv_icm42607/Makefile
index e908d77c4219..fc66e580fe99 100644
--- a/drivers/iio/imu/inv_icm42607/Makefile
+++ b/drivers/iio/imu/inv_icm42607/Makefile
@@ -2,6 +2,7 @@
obj-$(CONFIG_INV_ICM42607) += inv-icm42607.o
inv-icm42607-y += inv_icm42607_core.o
+inv-icm42607-y += inv_icm42607_gyro.o
inv-icm42607-y += inv_icm42607_accel.o
inv-icm42607-y += inv_icm42607_buffer.o
inv-icm42607-y += inv_icm42607_temp.o
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
index f5f1b5fea183..76388ffb88e3 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h
@@ -441,6 +441,10 @@ int inv_icm42607_set_accel_conf(struct inv_icm42607_state *st,
struct inv_icm42607_sensor_conf *conf,
unsigned int *sleep_ms);
+int inv_icm42607_set_gyro_conf(struct inv_icm42607_state *st,
+ struct inv_icm42607_sensor_conf *conf,
+ unsigned int *sleep_ms);
+
int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
unsigned int *sleep_ms);
@@ -453,6 +457,10 @@ int inv_icm42607_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
int inv_icm42607_core_probe(struct regmap *regmap, int chip,
inv_icm42607_bus_setup bus_setup);
+struct iio_dev *inv_icm42607_gyro_init(struct inv_icm42607_state *st);
+
+int inv_icm42607_gyro_parse_fifo(struct iio_dev *indio_dev);
+
struct iio_dev *inv_icm42607_accel_init(struct inv_icm42607_state *st);
int inv_icm42607_accel_parse_fifo(struct iio_dev *indio_dev);
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
index b086068e56ce..92cf7ffe5077 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_buffer.c
@@ -384,7 +384,10 @@ static int inv_icm42607_buffer_postdisable(struct iio_dev *indio_dev)
goto out_unlock;
conf.mode = INV_ICM42607_SENSOR_MODE_OFF;
- ret = inv_icm42607_set_accel_conf(st, &conf, &sleep_sensor);
+ if (sensor == INV_ICM42607_SENSOR_GYRO)
+ ret = inv_icm42607_set_gyro_conf(st, &conf, &sleep_sensor);
+ else
+ ret = inv_icm42607_set_accel_conf(st, &conf, &sleep_sensor);
if (ret)
goto out_unlock;
@@ -473,6 +476,7 @@ int inv_icm42607_buffer_fifo_read(struct inv_icm42607_state *st,
int inv_icm42607_buffer_fifo_parse(struct inv_icm42607_state *st)
{
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(st->indio_gyro);
struct inv_icm42607_sensor_state *accel_st = iio_priv(st->indio_accel);
struct inv_sensors_timestamp *ts;
int ret;
@@ -480,6 +484,16 @@ int inv_icm42607_buffer_fifo_parse(struct inv_icm42607_state *st)
if (st->fifo.nb.total == 0)
return 0;
+ /* handle gyroscope timestamp and FIFO data parsing */
+ if (st->fifo.nb.gyro > 0) {
+ ts = &gyro_st->ts;
+ inv_sensors_timestamp_interrupt(ts, st->fifo.watermark.eff_gyro,
+ st->timestamp.gyro);
+ ret = inv_icm42607_gyro_parse_fifo(st->indio_gyro);
+ if (ret)
+ return ret;
+ }
+
/* handle accelerometer timestamp and FIFO data parsing */
if (st->fifo.nb.accel > 0) {
ts = &accel_st->ts;
@@ -496,6 +510,7 @@ int inv_icm42607_buffer_fifo_parse(struct inv_icm42607_state *st)
int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
unsigned int count)
{
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(st->indio_gyro);
struct inv_icm42607_sensor_state *accel_st = iio_priv(st->indio_accel);
struct inv_sensors_timestamp *ts;
s64 gyro_ts, accel_ts;
@@ -511,6 +526,14 @@ int inv_icm42607_buffer_hwfifo_flush(struct inv_icm42607_state *st,
if (st->fifo.nb.total == 0)
return 0;
+ if (st->fifo.nb.gyro > 0) {
+ ts = &gyro_st->ts;
+ inv_sensors_timestamp_interrupt(ts, st->fifo.nb.gyro, gyro_ts);
+ ret = inv_icm42607_gyro_parse_fifo(st->indio_gyro);
+ if (ret)
+ return ret;
+ }
+
if (st->fifo.nb.accel > 0) {
ts = &accel_st->ts;
inv_sensors_timestamp_interrupt(ts, st->fifo.nb.accel, accel_ts);
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
index 4ac3af52c1b8..6d95ffb675f3 100644
--- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c
@@ -219,6 +219,46 @@ int inv_icm42607_set_accel_conf(struct inv_icm42607_state *st,
st->conf.temp_en, sleep_ms);
}
+int inv_icm42607_set_gyro_conf(struct inv_icm42607_state *st,
+ struct inv_icm42607_sensor_conf *conf,
+ unsigned int *sleep_ms)
+{
+ struct inv_icm42607_sensor_conf *oldconf = &st->conf.gyro;
+ unsigned int val;
+ int ret;
+
+ if (conf->mode < 0)
+ conf->mode = oldconf->mode;
+ if (conf->fs < 0)
+ conf->fs = oldconf->fs;
+ if (conf->odr < 0)
+ conf->odr = oldconf->odr;
+ if (conf->filter < 0)
+ conf->filter = oldconf->filter;
+
+ if (conf->fs != oldconf->fs || conf->odr != oldconf->odr) {
+ val = INV_ICM42607_GYRO_CONFIG0_FS_SEL(conf->fs) |
+ INV_ICM42607_GYRO_CONFIG0_ODR(conf->odr);
+ ret = regmap_write(st->map, INV_ICM42607_REG_GYRO_CONFIG0, val);
+ if (ret)
+ return ret;
+ oldconf->fs = conf->fs;
+ oldconf->odr = conf->odr;
+ }
+
+ if (conf->filter != oldconf->filter) {
+ val = INV_ICM42607_GYRO_CONFIG1_FILTER(conf->filter);
+ ret = regmap_update_bits(st->map, INV_ICM42607_REG_GYRO_CONFIG1,
+ INV_ICM42607_GYRO_CONFIG1_FILTER_MASK, val);
+ if (ret)
+ return ret;
+ oldconf->filter = conf->filter;
+ }
+
+ return inv_icm42607_set_pwr_mgmt0(st, conf->mode, st->conf.accel.mode,
+ st->conf.temp_en, sleep_ms);
+}
+
int inv_icm42607_set_temp_conf(struct inv_icm42607_state *st, bool enable,
unsigned int *sleep_ms)
{
@@ -588,6 +628,11 @@ int inv_icm42607_core_probe(struct regmap *regmap, int chip,
if (ret)
return ret;
+ /* Initialize IIO device for Gyro */
+ st->indio_gyro = inv_icm42607_gyro_init(st);
+ if (IS_ERR(st->indio_gyro))
+ return PTR_ERR(st->indio_gyro);
+
/* Initialize IIO device for Accel */
st->indio_accel = inv_icm42607_accel_init(st);
if (IS_ERR(st->indio_accel))
diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_gyro.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_gyro.c
new file mode 100644
index 000000000000..80473c07c6a4
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_gyro.c
@@ -0,0 +1,579 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/math64.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/common/inv_sensors_timestamp.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+
+#include "inv_icm42607.h"
+#include "inv_icm42607_temp.h"
+#include "inv_icm42607_buffer.h"
+
+#define INV_ICM42607_GYRO_CHAN(_modifier, _index, _ext_info) \
+{ \
+ .type = IIO_ANGL_VEL, \
+ .modified = 1, \
+ .channel2 = _modifier, \
+ .info_mask_separate = \
+ BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = _index, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_BE, \
+ }, \
+ .ext_info = _ext_info, \
+}
+
+enum inv_icm42607_gyro_scan {
+ INV_ICM42607_GYRO_SCAN_X,
+ INV_ICM42607_GYRO_SCAN_Y,
+ INV_ICM42607_GYRO_SCAN_Z,
+ INV_ICM42607_GYRO_SCAN_TEMP,
+ INV_ICM42607_GYRO_SCAN_TIMESTAMP,
+};
+
+static const struct iio_chan_spec_ext_info inv_icm42607_gyro_ext_infos[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, inv_icm42607_get_mount_matrix),
+ {},
+};
+
+static const struct iio_chan_spec inv_icm42607_gyro_channels[] = {
+ INV_ICM42607_GYRO_CHAN(IIO_MOD_X, INV_ICM42607_GYRO_SCAN_X,
+ inv_icm42607_gyro_ext_infos),
+ INV_ICM42607_GYRO_CHAN(IIO_MOD_Y, INV_ICM42607_GYRO_SCAN_Y,
+ inv_icm42607_gyro_ext_infos),
+ INV_ICM42607_GYRO_CHAN(IIO_MOD_Z, INV_ICM42607_GYRO_SCAN_Z,
+ inv_icm42607_gyro_ext_infos),
+ INV_ICM42607_TEMP_CHAN(INV_ICM42607_GYRO_SCAN_TEMP),
+ IIO_CHAN_SOFT_TIMESTAMP(INV_ICM42607_GYRO_SCAN_TIMESTAMP),
+};
+
+/*
+ * IIO buffer data: size must be a power of 2 and timestamp aligned
+ * 16 bytes: 6 bytes angular velocity, 2 bytes temperature, 8 bytes timestamp
+ */
+struct inv_icm42607_gyro_buffer {
+ struct inv_icm42607_fifo_sensor_data gyro;
+ s16 temp;
+ aligned_s64 timestamp;
+};
+
+#define INV_ICM42607_SCAN_MASK_GYRO_3AXIS \
+ (BIT(INV_ICM42607_GYRO_SCAN_X) | \
+ BIT(INV_ICM42607_GYRO_SCAN_Y) | \
+ BIT(INV_ICM42607_GYRO_SCAN_Z))
+
+#define INV_ICM42607_SCAN_MASK_TEMP BIT(INV_ICM42607_GYRO_SCAN_TEMP)
+
+static const unsigned long inv_icm42607_gyro_scan_masks[] = {
+ /* 3-axis gyro + temperature */
+ INV_ICM42607_SCAN_MASK_GYRO_3AXIS | INV_ICM42607_SCAN_MASK_TEMP,
+ 0,
+};
+
+/* enable gyroscope sensor and FIFO write */
+static int inv_icm42607_gyro_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ unsigned int fifo_en = 0;
+ unsigned int sleep_gyro = 0;
+ unsigned int sleep_temp = 0;
+ unsigned int sleep;
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ if (*scan_mask & INV_ICM42607_SCAN_MASK_TEMP) {
+ /* enable temp sensor */
+ ret = inv_icm42607_set_temp_conf(st, true, &sleep_temp);
+ if (ret)
+ goto out_unlock;
+ fifo_en |= INV_ICM42607_SENSOR_TEMP;
+ }
+
+ if (*scan_mask & INV_ICM42607_SCAN_MASK_GYRO_3AXIS) {
+ /* enable gyro sensor */
+ conf.mode = INV_ICM42607_SENSOR_MODE_LOW_NOISE;
+ ret = inv_icm42607_set_gyro_conf(st, &conf, &sleep_gyro);
+ if (ret)
+ goto out_unlock;
+ fifo_en |= INV_ICM42607_SENSOR_GYRO;
+ }
+
+ /* update data FIFO write */
+ ret = inv_icm42607_buffer_set_fifo_en(st, fifo_en | st->fifo.en);
+ if (ret)
+ goto out_unlock;
+
+out_unlock:
+ mutex_unlock(&st->lock);
+ /* sleep maximum required time */
+ sleep = max(sleep_gyro, sleep_temp);
+ if (sleep)
+ msleep(sleep);
+ return ret;
+}
+
+static int inv_icm42607_gyro_read_sensor(struct inv_icm42607_state *st,
+ struct iio_chan_spec const *chan,
+ s16 *val)
+{
+ struct device *dev = regmap_get_device(st->map);
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ unsigned int reg;
+ __be16 *data;
+ int ret;
+
+ if (chan->type != IIO_ANGL_VEL)
+ return -EINVAL;
+
+ switch (chan->channel2) {
+ case IIO_MOD_X:
+ reg = INV_ICM42607_REG_GYRO_DATA_X1;
+ break;
+ case IIO_MOD_Y:
+ reg = INV_ICM42607_REG_GYRO_DATA_Y1;
+ break;
+ case IIO_MOD_Z:
+ reg = INV_ICM42607_REG_GYRO_DATA_Z1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ /* enable gyro sensor */
+ conf.mode = INV_ICM42607_SENSOR_MODE_LOW_NOISE;
+ ret = inv_icm42607_set_gyro_conf(st, &conf, NULL);
+ if (ret)
+ return ret;
+
+ /* read gyro register data */
+ data = (__be16 *)&st->buffer[0];
+ ret = regmap_bulk_read(st->map, reg, data, sizeof(*data));
+ if (ret)
+ return ret;
+
+ *val = (s16)be16_to_cpup(data);
+ if (*val == INV_ICM42607_DATA_INVALID)
+ ret = -EINVAL;
+
+ return ret;
+}
+
+/* IIO format int + nano */
+static const int inv_icm42607_gyro_scale[] = {
+ /* +/- 2000dps => 0.001065264 rad/s */
+ [2 * INV_ICM42607_GYRO_FS_2000DPS] = 0,
+ [2 * INV_ICM42607_GYRO_FS_2000DPS + 1] = 1065264,
+ /* +/- 1000dps => 0.000532632 rad/s */
+ [2 * INV_ICM42607_GYRO_FS_1000DPS] = 0,
+ [2 * INV_ICM42607_GYRO_FS_1000DPS + 1] = 532632,
+ /* +/- 500dps => 0.000266316 rad/s */
+ [2 * INV_ICM42607_GYRO_FS_500DPS] = 0,
+ [2 * INV_ICM42607_GYRO_FS_500DPS + 1] = 266316,
+ /* +/- 250dps => 0.000133158 rad/s */
+ [2 * INV_ICM42607_GYRO_FS_250DPS] = 0,
+ [2 * INV_ICM42607_GYRO_FS_250DPS + 1] = 133158,
+};
+
+static int inv_icm42607_gyro_read_scale(struct iio_dev *indio_dev,
+ int *val, int *val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(indio_dev);
+ unsigned int idx;
+
+ idx = st->conf.gyro.fs;
+
+ *val = gyro_st->scales[2 * idx];
+ *val2 = gyro_st->scales[2 * idx + 1];
+ return IIO_VAL_INT_PLUS_NANO;
+}
+
+static int inv_icm42607_gyro_write_scale(struct iio_dev *indio_dev,
+ int val, int val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(indio_dev);
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int idx;
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ int ret;
+
+ for (idx = 0; idx < gyro_st->scales_len; idx += 2) {
+ if (val == gyro_st->scales[idx] &&
+ val2 == gyro_st->scales[idx + 1])
+ break;
+ }
+ if (idx >= gyro_st->scales_len)
+ return -EINVAL;
+
+ conf.fs = idx / 2;
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_set_gyro_conf(st, &conf, NULL);
+
+ return ret;
+}
+
+/* IIO format int + micro */
+static const int inv_icm42607_gyro_odr[] = {
+ /* 12.5Hz */
+ 12, 500000,
+ /* 25Hz */
+ 25, 0,
+ /* 50Hz */
+ 50, 0,
+ /* 100Hz */
+ 100, 0,
+ /* 200Hz */
+ 200, 0,
+ /* 400Hz */
+ 400, 0,
+ /* 800Hz */
+ 800, 0,
+ /* 1600Hz */
+ 1600, 0,
+};
+
+static const int inv_icm42607_gyro_odr_conv[] = {
+ INV_ICM42607_ODR_12_5HZ,
+ INV_ICM42607_ODR_25HZ,
+ INV_ICM42607_ODR_50HZ,
+ INV_ICM42607_ODR_100HZ,
+ INV_ICM42607_ODR_200HZ,
+ INV_ICM42607_ODR_400HZ,
+ INV_ICM42607_ODR_800HZ,
+ INV_ICM42607_ODR_1600HZ,
+};
+
+static int inv_icm42607_gyro_read_odr(struct inv_icm42607_state *st,
+ int *val, int *val2)
+{
+ unsigned int odr;
+ unsigned int i;
+
+ odr = st->conf.gyro.odr;
+
+ for (i = 0; i < ARRAY_SIZE(inv_icm42607_gyro_odr_conv); ++i) {
+ if (inv_icm42607_gyro_odr_conv[i] == odr)
+ break;
+ }
+ if (i >= ARRAY_SIZE(inv_icm42607_gyro_odr_conv))
+ return -EINVAL;
+
+ *val = inv_icm42607_gyro_odr[2 * i];
+ *val2 = inv_icm42607_gyro_odr[2 * i + 1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int inv_icm42607_gyro_write_odr(struct iio_dev *indio_dev,
+ int val, int val2)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(indio_dev);
+ struct inv_sensors_timestamp *ts = &gyro_st->ts;
+ struct device *dev = regmap_get_device(st->map);
+ unsigned int idx;
+ struct inv_icm42607_sensor_conf conf = INV_ICM42607_SENSOR_CONF_INIT;
+ int ret;
+
+ for (idx = 0; idx < ARRAY_SIZE(inv_icm42607_gyro_odr); idx += 2) {
+ if (val == inv_icm42607_gyro_odr[idx] &&
+ val2 == inv_icm42607_gyro_odr[idx + 1])
+ break;
+ }
+ if (idx >= ARRAY_SIZE(inv_icm42607_gyro_odr))
+ return -EINVAL;
+
+ conf.odr = inv_icm42607_gyro_odr_conv[idx / 2];
+
+ PM_RUNTIME_ACQUIRE_AUTOSUSPEND(dev, pm);
+ if (PM_RUNTIME_ACQUIRE_ERR(&pm))
+ return -ENXIO;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_sensors_timestamp_update_odr(ts, inv_icm42607_odr_to_period(conf.odr),
+ iio_buffer_enabled(indio_dev));
+ if (ret)
+ return ret;
+
+ ret = inv_icm42607_set_gyro_conf(st, &conf, NULL);
+ if (ret)
+ return ret;
+ inv_icm42607_buffer_update_fifo_period(st);
+ inv_icm42607_buffer_update_watermark(st);
+
+ return ret;
+}
+
+/*
+ * Calibration bias values, IIO range format int + nano.
+ * Value is limited to +/-64dps coded on 12 bits signed. Step is 1/32 dps.
+ */
+static int inv_icm42607_gyro_write_calibbias(struct inv_icm42607_state *st,
+ struct iio_chan_spec const *chan,
+ int val, int val2)
+{
+ /* Not actually supported in the ICM-42607P registers */
+ return -EOPNOTSUPP;
+}
+
+static int inv_icm42607_gyro_read_calibbias(struct inv_icm42607_state *st,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2)
+{
+ /* Not actually supported in the ICM-42607P registers */
+ return -EOPNOTSUPP;
+}
+
+static int inv_icm42607_gyro_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ s16 data;
+ int ret;
+
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ break;
+ case IIO_TEMP:
+ return inv_icm42607_temp_read_raw(indio_dev, chan, val, val2, mask);
+ default:
+ return -EINVAL;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_gyro_read_sensor(st, chan, &data);
+ iio_device_release_direct(indio_dev);
+ if (ret)
+ return ret;
+ *val = data;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ return inv_icm42607_gyro_read_scale(indio_dev, val, val2);
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return inv_icm42607_gyro_read_odr(st, val, val2);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return inv_icm42607_gyro_read_calibbias(st, chan, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_icm42607_gyro_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ if (chan->type != IIO_ANGL_VEL)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_gyro_write_scale(indio_dev, val, val2);
+ iio_device_release_direct(indio_dev);
+ return ret;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return inv_icm42607_gyro_write_odr(indio_dev, val, val2);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (!iio_device_claim_direct(indio_dev))
+ return -EBUSY;
+ ret = inv_icm42607_gyro_write_calibbias(st, chan, val, val2);
+ iio_device_release_direct(indio_dev);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_icm42607_gyro_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long mask)
+{
+ if (chan->type != IIO_ANGL_VEL)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ return IIO_VAL_INT_PLUS_NANO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int inv_icm42607_gyro_hwfifo_set_watermark(struct iio_dev *indio_dev,
+ unsigned int val)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+
+ guard(mutex)(&st->lock);
+
+ st->fifo.watermark.gyro = val;
+ return inv_icm42607_buffer_update_watermark(st);
+}
+
+static int inv_icm42607_gyro_hwfifo_flush(struct iio_dev *indio_dev,
+ unsigned int count)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ int ret;
+
+ if (count == 0)
+ return 0;
+
+ guard(mutex)(&st->lock);
+
+ ret = inv_icm42607_buffer_hwfifo_flush(st, count);
+ if (ret)
+ return ret;
+
+ return st->fifo.nb.gyro;
+}
+
+static const struct iio_info inv_icm42607_gyro_info = {
+ .read_raw = inv_icm42607_gyro_read_raw,
+ .write_raw = inv_icm42607_gyro_write_raw,
+ .write_raw_get_fmt = inv_icm42607_gyro_write_raw_get_fmt,
+ .debugfs_reg_access = inv_icm42607_debugfs_reg,
+ .update_scan_mode = inv_icm42607_gyro_update_scan_mode,
+ .hwfifo_set_watermark = inv_icm42607_gyro_hwfifo_set_watermark,
+ .hwfifo_flush_to_buffer = inv_icm42607_gyro_hwfifo_flush,
+};
+
+struct iio_dev *inv_icm42607_gyro_init(struct inv_icm42607_state *st)
+{
+ struct device *dev = regmap_get_device(st->map);
+ const char *name;
+ struct inv_icm42607_sensor_state *gyro_st;
+ struct inv_sensors_timestamp_chip ts_chip;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ name = devm_kasprintf(dev, GFP_KERNEL, "%s-gyro", st->name);
+ if (!name)
+ return ERR_PTR(-ENOMEM);
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*gyro_st));
+ if (!indio_dev)
+ return ERR_PTR(-ENOMEM);
+ gyro_st = iio_priv(indio_dev);
+
+ gyro_st->scales = inv_icm42607_gyro_scale;
+ gyro_st->scales_len = ARRAY_SIZE(inv_icm42607_gyro_scale);
+
+ /*
+ * clock period is 32kHz (31250ns)
+ * jitter is +/- 2% (20 per mille)
+ */
+ ts_chip.clock_period = 31250;
+ ts_chip.jitter = 20;
+ ts_chip.init_period = inv_icm42607_odr_to_period(st->conf.accel.odr);
+ inv_sensors_timestamp_init(&gyro_st->ts, &ts_chip);
+
+ iio_device_set_drvdata(indio_dev, st);
+ indio_dev->name = name;
+ indio_dev->info = &inv_icm42607_gyro_info;
+ indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+ indio_dev->channels = inv_icm42607_gyro_channels;
+ indio_dev->num_channels = ARRAY_SIZE(inv_icm42607_gyro_channels);
+ indio_dev->available_scan_masks = inv_icm42607_gyro_scan_masks;
+ indio_dev->setup_ops = &inv_icm42607_buffer_ops;
+
+ ret = devm_iio_kfifo_buffer_setup(dev, indio_dev,
+ &inv_icm42607_buffer_ops);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = devm_iio_device_register(dev, indio_dev);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return indio_dev;
+}
+
+int inv_icm42607_gyro_parse_fifo(struct iio_dev *indio_dev)
+{
+ struct inv_icm42607_state *st = iio_device_get_drvdata(indio_dev);
+ struct inv_icm42607_sensor_state *gyro_st = iio_priv(indio_dev);
+ struct inv_sensors_timestamp *ts = &gyro_st->ts;
+ ssize_t i, size;
+ unsigned int no;
+ const void *accel, *gyro, *timestamp;
+ const s8 *temp;
+ unsigned int odr;
+ s64 ts_val;
+ struct inv_icm42607_gyro_buffer buffer = { };
+
+ /* parse all fifo packets */
+ for (i = 0, no = 0; i < st->fifo.count; i += size, ++no) {
+ size = inv_icm42607_fifo_decode_packet(&st->fifo.data[i],
+ &accel, &gyro, &temp, ×tamp, &odr);
+ /* quit if error or FIFO is empty */
+ if (size <= 0)
+ return size;
+
+ /* skip packet if no gyro data or data is invalid */
+ if (gyro == NULL || !inv_icm42607_fifo_is_data_valid(gyro))
+ continue;
+
+ /* update odr */
+ if (odr & INV_ICM42607_SENSOR_GYRO) {
+ inv_sensors_timestamp_apply_odr(ts, st->fifo.period,
+ st->fifo.nb.total, no);
+ }
+
+ memcpy(&buffer.gyro, gyro, sizeof(buffer.gyro));
+ /* convert 8 bits FIFO temperature in high resolution format */
+ buffer.temp = temp ? (*temp * 64) : 0;
+ ts_val = inv_sensors_timestamp_pop(ts);
+ iio_push_to_buffers_with_timestamp(indio_dev, &buffer, ts_val);
+ }
+
+ return 0;
+}
--
2.43.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 9/9] arm64: dts: rockchip: Add icm42607p IMU for RG-DS
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (7 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 8/9] iio: imu: inv_icm42607: Add Gyroscope to icm42607 Chris Morgan
@ 2026-03-30 19:58 ` Chris Morgan
2026-03-31 11:25 ` [PATCH V3 0/9] Add Invensense ICM42607 Andy Shevchenko
9 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-30 19:58 UTC (permalink / raw)
To: linux-iio
Cc: andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
andriy.shevchenko, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add the Invensense ICM42607P IMU for the Anbernic RG-DS. Mount-matrix
was tested with iio-sensor-proxy and reports correct orientation.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
.../dts/rockchip/rk3568-anbernic-rg-ds.dts | 20 ++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3568-anbernic-rg-ds.dts b/arch/arm64/boot/dts/rockchip/rk3568-anbernic-rg-ds.dts
index 44de35bcd001..834d2c940810 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-anbernic-rg-ds.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-anbernic-rg-ds.dts
@@ -872,7 +872,18 @@ aw87391_pa_r: audio-codec@5b {
sound-name-prefix = "Right Amp";
};
- /* invensense,icm42607p at 0x68 */
+ icm42607p: imu@68 {
+ compatible = "invensense,icm42607p";
+ reg = <0x68>;
+ interrupt-names = "INT1";
+ interrupt-parent = <&gpio0>;
+ interrupts = <RK_PD6 IRQ_TYPE_EDGE_FALLING>;
+ mount-matrix = "-1", "0", "0",
+ "0", "1", "0",
+ "0", "0", "-1";
+ pinctrl-0 = <&accel_irq>;
+ pinctrl-names = "default";
+ };
};
&i2c3 {
@@ -933,6 +944,13 @@ &i2s1_8ch {
};
&pinctrl {
+ accel {
+ accel_irq: accel-irq {
+ rockchip,pins =
+ <0 RK_PD6 RK_FUNC_GPIO &pcfg_pull_up>;
+ };
+ };
+
gpio-keys {
vol_keys_l: vol-keys_l {
rockchip,pins =
--
2.43.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH V3 0/9] Add Invensense ICM42607
2026-03-30 19:58 [PATCH V3 0/9] Add Invensense ICM42607 Chris Morgan
` (8 preceding siblings ...)
2026-03-30 19:58 ` [PATCH V3 9/9] arm64: dts: rockchip: Add icm42607p IMU for RG-DS Chris Morgan
@ 2026-03-31 11:25 ` Andy Shevchenko
2026-03-31 15:15 ` Chris Morgan
9 siblings, 1 reply; 12+ messages in thread
From: Andy Shevchenko @ 2026-03-31 11:25 UTC (permalink / raw)
To: Chris Morgan
Cc: linux-iio, andy, nuno.sa, dlechner, jic23, jean-baptiste.maneyrol,
linux-rockchip, devicetree, heiko, conor+dt, krzk+dt, robh,
Chris Morgan
On Mon, Mar 30, 2026 at 02:58:44PM -0500, Chris Morgan wrote:
> Add support for the ICM42607 IMU. This sensor shares the same
> functionality but a different register layout with the existing
> ICM42600.
>
> This driver should work with the ICM42607 and ICM42607P over both I2C
> and SPI, however only the ICM42607P over I2C could be tested.
>
> Changes Since V1:
> - Instead of creating a new driver, merged with the existing inv_icm42600
> driver. This necessitated adding some code to the existing driver to
> permit using a different register layout for the same functionality.
> - Split changes up a bit more to decrease the size of the individual
> patches. Note that patch 0004 is still pretty hefty; if I need to split
> further I may need to create some temporary stub functions.
> - Used guard() and PM_RUNTIME_ACQUIRE_AUTOSUSPEND() on the new functions
> per Jonathan's recommendations.
>
> Changes Since V2:
> - Went back to using a new driver on advice from Invensense engineer.
Okay, but this should be elaborated in the cover letter. If I followed
previous discussion correctly, the problem is the indirect subset of
registers that are absent on the 42600 series. But would be nice to have
the summary of what vendor engineers told you.
> - Further split changes up into smaller chunks of functionality. Note
> still that the largest patch is approximately 900 lines, and that while
> the driver compiles cleanly at each commit it is not able to drive the
> hardware until the commit that adds the Interrupt (as it also adds the
> Makefile).
> - Change the error to a warning when the devicetree binding does not match
> the hardware ID.
> - Dropped the ack on the devicetree bindings, as I am creating a new file
> (for a new driver) instead of modifying the existing one.
--
With Best Regards,
Andy Shevchenko
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^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [PATCH V3 0/9] Add Invensense ICM42607
2026-03-31 11:25 ` [PATCH V3 0/9] Add Invensense ICM42607 Andy Shevchenko
@ 2026-03-31 15:15 ` Chris Morgan
0 siblings, 0 replies; 12+ messages in thread
From: Chris Morgan @ 2026-03-31 15:15 UTC (permalink / raw)
To: Andy Shevchenko
Cc: Chris Morgan, linux-iio, andy, nuno.sa, dlechner, jic23,
jean-baptiste.maneyrol, linux-rockchip, devicetree, heiko,
conor+dt, krzk+dt, robh
On Tue, Mar 31, 2026 at 02:25:54PM +0300, Andy Shevchenko wrote:
> On Mon, Mar 30, 2026 at 02:58:44PM -0500, Chris Morgan wrote:
>
> > Add support for the ICM42607 IMU. This sensor shares the same
> > functionality but a different register layout with the existing
> > ICM42600.
> >
> > This driver should work with the ICM42607 and ICM42607P over both I2C
> > and SPI, however only the ICM42607P over I2C could be tested.
> >
> > Changes Since V1:
> > - Instead of creating a new driver, merged with the existing inv_icm42600
> > driver. This necessitated adding some code to the existing driver to
> > permit using a different register layout for the same functionality.
> > - Split changes up a bit more to decrease the size of the individual
> > patches. Note that patch 0004 is still pretty hefty; if I need to split
> > further I may need to create some temporary stub functions.
> > - Used guard() and PM_RUNTIME_ACQUIRE_AUTOSUSPEND() on the new functions
> > per Jonathan's recommendations.
> >
> > Changes Since V2:
> > - Went back to using a new driver on advice from Invensense engineer.
>
> Okay, but this should be elaborated in the cover letter. If I followed
> previous discussion correctly, the problem is the indirect subset of
> registers that are absent on the 42600 series. But would be nice to have
> the summary of what vendor engineers told you.
Sorry, I should have elaborated you are correct. The information the
engineer said was that the 42607 chips use an indirect register access
method using IREG specific registers. As a result it did not make sense
to have the 42600 and 42607 drivers combined.
That said, the driver in question here does not use any of those specific
IREG registers (but it's possible other future 42607 devices could).
Specifically, I only have the 42607P (via I2C) to test with, which does
not have those registers only ones that can be directly accessed.
I hope this clears that up, I'll try to include that information in the
next patch. I also want to make sure with this revision that I'm "in the
ballpark" for breaking this down into digestable chunks.
Thank you,
Chris
>
> > - Further split changes up into smaller chunks of functionality. Note
> > still that the largest patch is approximately 900 lines, and that while
> > the driver compiles cleanly at each commit it is not able to drive the
> > hardware until the commit that adds the Interrupt (as it also adds the
> > Makefile).
> > - Change the error to a warning when the devicetree binding does not match
> > the hardware ID.
> > - Dropped the ack on the devicetree bindings, as I am creating a new file
> > (for a new driver) instead of modifying the existing one.
>
> --
> With Best Regards,
> Andy Shevchenko
>
>
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^ permalink raw reply [flat|nested] 12+ messages in thread