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Tue, 12 May 2026 15:19:09 -0700 (PDT) From: Chris Morgan To: linux-iio@vger.kernel.org Cc: andy@kernel.org, nuno.sa@analog.com, dlechner@baylibre.com, jic23@kernel.org, jean-baptiste.maneyrol@tdk.com, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, andriy.shevchenko@intel.com, Chris Morgan Subject: [PATCH V6 07/11] iio: imu: inv_icm42607: Add Temp Support in icm42607 Date: Tue, 12 May 2026 17:16:28 -0500 Message-ID: <20260512221634.256747-8-macroalpha82@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260512221634.256747-1-macroalpha82@gmail.com> References: <20260512221634.256747-1-macroalpha82@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Chris Morgan Add functions for reading temperature sensor data. Signed-off-by: Chris Morgan --- drivers/iio/imu/inv_icm42607/Makefile | 1 + drivers/iio/imu/inv_icm42607/inv_icm42607.h | 3 + .../iio/imu/inv_icm42607/inv_icm42607_core.c | 18 +++++ .../iio/imu/inv_icm42607/inv_icm42607_temp.c | 80 +++++++++++++++++++ .../iio/imu/inv_icm42607/inv_icm42607_temp.h | 33 ++++++++ 5 files changed, 135 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/Makefile b/drivers/iio/imu/inv_icm42607/Makefile index 3c9d08509793..ccb8e007cdeb 100644 --- a/drivers/iio/imu/inv_icm42607/Makefile +++ b/drivers/iio/imu/inv_icm42607/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_INV_ICM42607) += inv-icm42607.o inv-icm42607-y += inv_icm42607_core.o inv-icm42607-y += inv_icm42607_buffer.o +inv-icm42607-y += inv_icm42607_temp.o obj-$(CONFIG_INV_ICM42607_I2C) += inv-icm42607-i2c.o inv-icm42607-i2c-y += inv_icm42607_i2c.o diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607.h b/drivers/iio/imu/inv_icm42607/inv_icm42607.h index b00ee6a4d451..4e053281dc55 100644 --- a/drivers/iio/imu/inv_icm42607/inv_icm42607.h +++ b/drivers/iio/imu/inv_icm42607/inv_icm42607.h @@ -379,6 +379,9 @@ 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_core_probe(struct regmap *regmap, const struct inv_icm42607_hw *hw, inv_icm42607_bus_setup bus_setup); diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c index 3b5d5722ae39..9b10722af3ae 100644 --- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c +++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c @@ -164,6 +164,24 @@ 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 = FIELD_PREP(INV_ICM42607_TEMP_CONFIG0_FILTER_MASK, + 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); +} + static int inv_icm42607_set_conf(struct inv_icm42607_state *st, const struct inv_icm42607_conf *conf) { 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..7e9cb072a011 --- /dev/null +++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2026 InvenSense, Inc. + */ + +#include +#include +#include +#include +#include + +#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 = &st->buffer[0]; + ret = regmap_bulk_read(st->map, INV_ICM42607_REG_TEMP_DATA1, raw, sizeof(*raw)); + if (ret) + return ret; + + *temp = be16_to_cpup(raw); + if (*temp == INV_ICM42607_DATA_INVALID) + return -EINVAL; + + return 0; +} + +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: 3200 + */ + case IIO_CHAN_INFO_SCALE: + *val = 7; + *val2 = 812500000; + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + *val = 3200; + 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..e03924e30866 --- /dev/null +++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_temp.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2026 InvenSense, Inc. + */ + +#ifndef INV_ICM42607_TEMP_H_ +#define INV_ICM42607_TEMP_H_ + +#include + +struct iio_dev; +struct iio_chan_spec; + +#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