From: Chris Morgan <macroalpha82@gmail.com>
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 <macromorgan@hotmail.com>
Subject: [PATCH V3 5/9] iio: imu: inv_icm42607: Add Temperature Support in icm42607
Date: Mon, 30 Mar 2026 14:58:49 -0500 [thread overview]
Message-ID: <20260330195853.392877-6-macroalpha82@gmail.com> (raw)
In-Reply-To: <20260330195853.392877-1-macroalpha82@gmail.com>
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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next prev parent reply other threads:[~2026-03-30 20:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
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 ` [PATCH V3 3/9] iio: imu: inv_icm42607: Add I2C and SPI For icm42607 Chris Morgan
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 [this message]
2026-03-30 19:58 ` [PATCH V3 6/9] iio: imu: inv_icm42607: Add Accelerometer for icm42607 Chris Morgan
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 ` [PATCH V3 8/9] iio: imu: inv_icm42607: Add Gyroscope to icm42607 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
2026-03-31 15:15 ` Chris Morgan
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