[PATCH v5 0/2] iio: magnetometer: add support for Si7210

[PATCH v5 0/2] iio: magnetometer: add support for Si7210

[Antoni Pokusinski]

This patch series adds support for the Si7210 Hall effect I2C sensor.
The driver currently supports the basic functionalities (i.e. making
temperature and magnetic field measurements and changing the
measurements scale) but I plan to add support for some other features in
the future as well (e.g. the digital output interrupt).

---
Hi all,
In this version I add only some minor tweaks and comments (for the
temperature calculation) according to the latest review.
Everything else was left intact.

Kind regards,
Antoni


Changes since v4:
* Makefile: replace spaces/tabs mixture with tabs only
* si7210: includes: move asm/byteorder.h to the end
* si7210: read_raw: add comments for temperature calculation

Changes since v3:
* si7210: fetch_measurement/read_raw: fix issue with endianess
* si7210: replace `if (ret < 0)` with `if (ret)` wherever possible
* si7210: read_raw: use SI metric prefixes (MICRO, MILLI)
* si7210: si7210_data: swap i2c_client with regmap
* si7210: read_otpreg_val: remove unnecessary cast
* si7210: minor formatting updates
(add missing trailing commas, spaces etc)
* si7210: probe: use devm_mutex_init
* si7210: add missing includes

Changes since v2:
* Makefile: fix alignment
* si7210: fetch_measurement: use temporary variable to read the
measurement instead of reading directly to `buf`
* si7210: read_raw: change `tmp` to `temp`
* si7210: read_raw: adjust temperature computation to match the spec better
* si7210: device_wake: do not init `ret` to 0
* si7210: MODULE_LICENSE: change license type to GPL
* si7210: minor improvements in comments

Changes since v1:
* dt-binding: add `vdd-supply`
* si7210: reorder includes in alphabetic order
* si7210: add comment for `fetch_lock`
* si7210: remove `otp_lock`
* si7210: fetch_measurement: change result type to __be16
* si7210: use guard(mutex) instead of scoped_guard
* si7210: read_raw: use FIELD_GET to get raw temperature value
* si7210: read_raw: return temperature in milli-celsius
* si7210: use regulator for getting the voltage
* si7210: si7210_device_wake: remove unnecessary cast
* si7210: si7210_device_init: use fsleep instead of usleep_range
* si7210: si7210_probe: remove i2c_set_clientdata()
* si7210: minor alignment and formatting fixes

Antoni Pokusinski (2):
  dt-bindings: iio: magnetometer: add binding for Si7210
  iio: magnetometer: si7210: add driver for Si7210

 .../iio/magnetometer/silabs,si7210.yaml       |  48 ++
 drivers/iio/magnetometer/Kconfig              |  11 +
 drivers/iio/magnetometer/Makefile             |   2 +
 drivers/iio/magnetometer/si7210.c             | 446 ++++++++++++++++++
 4 files changed, 507 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/magnetometer/silabs,si7210.yaml
 create mode 100644 drivers/iio/magnetometer/si7210.c

-- 
2.25.1

[PATCH v5 1/2] dt-bindings: iio: magnetometer: add binding for Si7210

[Antoni Pokusinski]

Silicon Labs Si7210 is an I2C Hall effect magnetic position
and temperature sensor.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Antoni Pokusinski <apokusinski01@gmail.com>
---
 .../iio/magnetometer/silabs,si7210.yaml       | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/magnetometer/silabs,si7210.yaml

diff --git a/Documentation/devicetree/bindings/iio/magnetometer/silabs,si7210.yaml b/Documentation/devicetree/bindings/iio/magnetometer/silabs,si7210.yaml
new file mode 100644
index 000000000000..d4a3f7981c36
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/magnetometer/silabs,si7210.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/magnetometer/silabs,si7210.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Si7210 magnetic position and temperature sensor
+
+maintainers:
+  - Antoni Pokusinski <apokusinski01@gmail.com>
+
+description: |
+  Silabs Si7210 I2C Hall effect magnetic position and temperature sensor.
+  https://www.silabs.com/documents/public/data-sheets/si7210-datasheet.pdf
+
+properties:
+  compatible:
+    const: silabs,si7210
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that provides power to the sensor
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        magnetometer@30 {
+            compatible = "silabs,si7210";
+            reg = <0x30>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
+            vdd-supply = <&vdd_3v3_reg>;
+        };
+    };
-- 
2.25.1

[PATCH v5 2/2] iio: magnetometer: si7210: add driver for Si7210

[Antoni Pokusinski]

Silicon Labs Si7210 is an I2C Hall effect magnetic position and
temperature sensor. The driver supports the following functionalities:
* reading the temperature measurements
* reading the magnetic field measurements in a single-shot mode
* choosing the magnetic field measurement scale (20 or 200 mT)

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Antoni Pokusinski <apokusinski01@gmail.com>
---
 drivers/iio/magnetometer/Kconfig  |  11 +
 drivers/iio/magnetometer/Makefile |   2 +
 drivers/iio/magnetometer/si7210.c | 446 ++++++++++++++++++++++++++++++
 3 files changed, 459 insertions(+)
 create mode 100644 drivers/iio/magnetometer/si7210.c

diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
index 7177cd1d67cb..3debf1320ad1 100644
--- a/drivers/iio/magnetometer/Kconfig
+++ b/drivers/iio/magnetometer/Kconfig
@@ -235,6 +235,17 @@ config SENSORS_RM3100_SPI
 	  To compile this driver as a module, choose M here: the module
 	  will be called rm3100-spi.
 
+config SI7210
+	tristate "SI7210 Hall effect sensor"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say Y here to add support for the SI7210 Hall effect sensor.
+
+	  This driver can also be compiled as a module.
+	  To compile this driver as a module, choose M here: the module
+	  will be called si7210.
+
 config TI_TMAG5273
 	tristate "TI TMAG5273 Low-Power Linear 3D Hall-Effect Sensor"
 	depends on I2C
diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile
index 3e4c2ecd9adf..9297723a97d8 100644
--- a/drivers/iio/magnetometer/Makefile
+++ b/drivers/iio/magnetometer/Makefile
@@ -31,6 +31,8 @@ obj-$(CONFIG_SENSORS_RM3100)		+= rm3100-core.o
 obj-$(CONFIG_SENSORS_RM3100_I2C)	+= rm3100-i2c.o
 obj-$(CONFIG_SENSORS_RM3100_SPI)	+= rm3100-spi.o
 
+obj-$(CONFIG_SI7210)			+= si7210.o
+
 obj-$(CONFIG_TI_TMAG5273)		+= tmag5273.o
 
 obj-$(CONFIG_YAMAHA_YAS530)		+= yamaha-yas530.o
diff --git a/drivers/iio/magnetometer/si7210.c b/drivers/iio/magnetometer/si7210.c
new file mode 100644
index 000000000000..43b00d76505a
--- /dev/null
+++ b/drivers/iio/magnetometer/si7210.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Silicon Labs Si7210 Hall Effect sensor driver
+ *
+ * Copyright (c) 2024 Antoni Pokusinski <apokusinski01@gmail.com>
+ *
+ * Datasheet:
+ *  https://www.silabs.com/documents/public/data-sheets/si7210-datasheet.pdf
+ */
+
+#include <linux/array_size.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/cleanup.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/math64.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+#include <linux/units.h>
+#include <asm/byteorder.h>
+
+/* Registers offsets and masks */
+#define SI7210_REG_DSPSIGM	0xC1
+#define SI7210_REG_DSPSIGL	0xC2
+
+#define SI7210_MASK_DSPSIGSEL	GENMASK(2, 0)
+#define SI7210_REG_DSPSIGSEL	0xC3
+
+#define SI7210_MASK_STOP	BIT(1)
+#define SI7210_MASK_ONEBURST	BIT(2)
+#define SI7210_REG_POWER_CTRL	0xC4
+
+#define SI7210_MASK_ARAUTOINC	BIT(0)
+#define SI7210_REG_ARAUTOINC	0xC5
+
+#define SI7210_REG_A0		0xCA
+#define SI7210_REG_A1		0xCB
+#define SI7210_REG_A2		0xCC
+#define SI7210_REG_A3		0xCE
+#define SI7210_REG_A4		0xCF
+#define SI7210_REG_A5		0xD0
+
+#define SI7210_REG_OTP_ADDR	0xE1
+#define SI7210_REG_OTP_DATA	0xE2
+
+#define SI7210_MASK_OTP_READ_EN	BIT(1)
+#define SI7210_REG_OTP_CTRL	0xE3
+
+/* OTP data registers offsets */
+#define SI7210_OTPREG_TMP_OFF	0x1D
+#define SI7210_OTPREG_TMP_GAIN	0x1E
+
+#define SI7210_OTPREG_A0_20	0x21
+#define SI7210_OTPREG_A1_20	0x22
+#define SI7210_OTPREG_A2_20	0x23
+#define SI7210_OTPREG_A3_20	0x24
+#define SI7210_OTPREG_A4_20	0x25
+#define SI7210_OTPREG_A5_20	0x26
+
+#define SI7210_OTPREG_A0_200	0x27
+#define SI7210_OTPREG_A1_200	0x28
+#define SI7210_OTPREG_A2_200	0x29
+#define SI7210_OTPREG_A3_200	0x2A
+#define SI7210_OTPREG_A4_200	0x2B
+#define SI7210_OTPREG_A5_200	0x2C
+
+#define A_REGS_COUNT 6
+
+static const unsigned int a20_otp_regs[A_REGS_COUNT] = {
+	SI7210_OTPREG_A0_20, SI7210_OTPREG_A1_20, SI7210_OTPREG_A2_20,
+	SI7210_OTPREG_A3_20, SI7210_OTPREG_A4_20, SI7210_OTPREG_A5_20,
+};
+
+static const unsigned int a200_otp_regs[A_REGS_COUNT] = {
+	SI7210_OTPREG_A0_200, SI7210_OTPREG_A1_200, SI7210_OTPREG_A2_200,
+	SI7210_OTPREG_A3_200, SI7210_OTPREG_A4_200, SI7210_OTPREG_A5_200,
+};
+
+static const struct regmap_range si7210_read_reg_ranges[] = {
+	regmap_reg_range(SI7210_REG_DSPSIGM, SI7210_REG_ARAUTOINC),
+	regmap_reg_range(SI7210_REG_A0, SI7210_REG_A2),
+	regmap_reg_range(SI7210_REG_A3, SI7210_REG_A5),
+	regmap_reg_range(SI7210_REG_OTP_ADDR, SI7210_REG_OTP_CTRL),
+};
+
+static const struct regmap_access_table si7210_readable_regs = {
+	.yes_ranges = si7210_read_reg_ranges,
+	.n_yes_ranges = ARRAY_SIZE(si7210_read_reg_ranges),
+};
+
+static const struct regmap_range si7210_write_reg_ranges[] = {
+	regmap_reg_range(SI7210_REG_DSPSIGSEL, SI7210_REG_ARAUTOINC),
+	regmap_reg_range(SI7210_REG_A0, SI7210_REG_A2),
+	regmap_reg_range(SI7210_REG_A3, SI7210_REG_A5),
+	regmap_reg_range(SI7210_REG_OTP_ADDR, SI7210_REG_OTP_CTRL),
+};
+
+static const struct regmap_access_table si7210_writeable_regs = {
+	.yes_ranges = si7210_write_reg_ranges,
+	.n_yes_ranges = ARRAY_SIZE(si7210_write_reg_ranges),
+};
+
+static const struct regmap_range si7210_volatile_reg_ranges[] = {
+	regmap_reg_range(SI7210_REG_DSPSIGM, SI7210_REG_DSPSIGL),
+	regmap_reg_range(SI7210_REG_POWER_CTRL, SI7210_REG_POWER_CTRL),
+};
+
+static const struct regmap_access_table si7210_volatile_regs = {
+	.yes_ranges = si7210_volatile_reg_ranges,
+	.n_yes_ranges = ARRAY_SIZE(si7210_volatile_reg_ranges),
+};
+
+static const struct regmap_config si7210_regmap_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = SI7210_REG_OTP_CTRL,
+
+	.rd_table = &si7210_readable_regs,
+	.wr_table = &si7210_writeable_regs,
+	.volatile_table = &si7210_volatile_regs,
+};
+
+struct si7210_data {
+	struct regmap *regmap;
+	struct i2c_client *client;
+	struct regulator *vdd;
+	struct mutex fetch_lock; /* lock for a single measurement fetch */
+	s8 temp_offset;
+	s8 temp_gain;
+	s8 scale_20_a[A_REGS_COUNT];
+	s8 scale_200_a[A_REGS_COUNT];
+	u8 curr_scale;
+};
+
+static const struct iio_chan_spec si7210_channels[] = {
+	{
+		.type = IIO_MAGN,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+			BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),
+	}, {
+		.type = IIO_TEMP,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+	},
+};
+
+static int si7210_fetch_measurement(struct si7210_data *data,
+				    struct iio_chan_spec const *chan,
+				    u16 *buf)
+{
+	u8 dspsigsel = chan->type == IIO_MAGN ? 0 : 1;
+	int ret;
+	__be16 result;
+
+	guard(mutex)(&data->fetch_lock);
+
+	ret = regmap_update_bits(data->regmap, SI7210_REG_DSPSIGSEL,
+				 SI7210_MASK_DSPSIGSEL, dspsigsel);
+	if (ret)
+		return ret;
+
+	ret = regmap_update_bits(data->regmap, SI7210_REG_POWER_CTRL,
+				 SI7210_MASK_ONEBURST | SI7210_MASK_STOP,
+				 SI7210_MASK_ONEBURST & ~SI7210_MASK_STOP);
+	if (ret)
+		return ret;
+
+	/*
+	 * Read the contents of the
+	 * registers containing the result: DSPSIGM, DSPSIGL
+	 */
+	ret = regmap_bulk_read(data->regmap, SI7210_REG_DSPSIGM,
+			       &result, sizeof(result));
+	if (ret)
+		return ret;
+
+	*buf = be16_to_cpu(result);
+
+	return 0;
+}
+
+static int si7210_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val, int *val2, long mask)
+{
+	struct si7210_data *data = iio_priv(indio_dev);
+	long long temp;
+	u16 dspsig;
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = si7210_fetch_measurement(data, chan, &dspsig);
+		if (ret)
+			return ret;
+
+		*val = dspsig & GENMASK(14, 0);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		if (data->curr_scale == 20)
+			*val2 = 1250;
+		else /* data->curr_scale == 200 */
+			*val2 = 12500;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = -16384;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_PROCESSED:
+		ret = si7210_fetch_measurement(data, chan, &dspsig);
+		if (ret)
+			return ret;
+
+		/* temp = 32 * Dspsigm[6:0] + (Dspsigl[7:0] >> 3) */
+		temp = FIELD_GET(GENMASK(14, 3), dspsig);
+		temp = div_s64(-383 * temp * temp, 100) + 160940 * temp - 279800000;
+		temp *= (1 + (data->temp_gain / 2048));
+		temp += (int)(MICRO / 16) * data->temp_offset;
+
+		ret = regulator_get_voltage(data->vdd);
+		if (ret < 0)
+			return ret;
+
+		/* temp -= 0.222 * VDD */
+		temp -= 222 * div_s64(ret, MILLI);
+
+		*val = div_s64(temp, MILLI);
+
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int si7210_set_scale(struct si7210_data *data, unsigned int scale)
+{
+	s8 *a_otp_values;
+	int ret;
+
+	if (scale == 20)
+		a_otp_values = data->scale_20_a;
+	else if (scale == 200)
+		a_otp_values = data->scale_200_a;
+	else
+		return -EINVAL;
+
+	guard(mutex)(&data->fetch_lock);
+
+	/* Write the registers 0xCA - 0xCC */
+	ret = regmap_bulk_write(data->regmap, SI7210_REG_A0, a_otp_values, 3);
+	if (ret)
+		return ret;
+
+	/* Write the registers 0xCE - 0xD0 */
+	ret = regmap_bulk_write(data->regmap, SI7210_REG_A3, &a_otp_values[3], 3);
+	if (ret)
+		return ret;
+
+	data->curr_scale = scale;
+
+	return 0;
+}
+
+static int si7210_write_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int val, int val2, long mask)
+{
+	struct si7210_data *data = iio_priv(indio_dev);
+	unsigned int scale;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		if (val == 0 && val2 == 1250)
+			scale = 20;
+		else if (val == 0 && val2 == 12500)
+			scale = 200;
+		else
+			return -EINVAL;
+
+		return si7210_set_scale(data, scale);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int si7210_read_otpreg_val(struct si7210_data *data, unsigned int otpreg, u8 *val)
+{
+	int ret;
+	unsigned int otpdata;
+
+	ret = regmap_write(data->regmap, SI7210_REG_OTP_ADDR, otpreg);
+	if (ret)
+		return ret;
+
+	ret = regmap_update_bits(data->regmap, SI7210_REG_OTP_CTRL,
+				 SI7210_MASK_OTP_READ_EN, SI7210_MASK_OTP_READ_EN);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(data->regmap, SI7210_REG_OTP_DATA, &otpdata);
+	if (ret)
+		return ret;
+
+	*val = otpdata;
+
+	return 0;
+}
+
+/*
+ * According to the datasheet, the primary method to wake up a
+ * device is to send an empty write. However this is not feasible
+ * using the current API so we use the other method i.e. read a single
+ * byte. The device should respond with 0xFF.
+ */
+static int si7210_device_wake(struct si7210_data *data)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte(data->client);
+	if (ret < 0)
+		return ret;
+
+	if (ret != 0xFF)
+		return -EIO;
+
+	return 0;
+}
+
+static int si7210_device_init(struct si7210_data *data)
+{
+	int ret;
+	unsigned int i;
+
+	ret = si7210_device_wake(data);
+	if (ret)
+		return ret;
+
+	fsleep(1000);
+
+	ret = si7210_read_otpreg_val(data, SI7210_OTPREG_TMP_GAIN, &data->temp_gain);
+	if (ret)
+		return ret;
+
+	ret = si7210_read_otpreg_val(data, SI7210_OTPREG_TMP_OFF, &data->temp_offset);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < A_REGS_COUNT; i++) {
+		ret = si7210_read_otpreg_val(data, a20_otp_regs[i], &data->scale_20_a[i]);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < A_REGS_COUNT; i++) {
+		ret = si7210_read_otpreg_val(data, a200_otp_regs[i], &data->scale_200_a[i]);
+		if (ret)
+			return ret;
+	}
+
+	ret = regmap_update_bits(data->regmap, SI7210_REG_ARAUTOINC,
+				 SI7210_MASK_ARAUTOINC, SI7210_MASK_ARAUTOINC);
+	if (ret)
+		return ret;
+
+	return si7210_set_scale(data, 20);
+}
+
+static const struct iio_info si7210_info = {
+	.read_raw = si7210_read_raw,
+	.write_raw = si7210_write_raw,
+};
+
+static int si7210_probe(struct i2c_client *client)
+{
+	struct si7210_data *data;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+
+	ret = devm_mutex_init(&client->dev, &data->fetch_lock);
+	if (ret)
+		return ret;
+
+	data->regmap = devm_regmap_init_i2c(client, &si7210_regmap_conf);
+	if (IS_ERR(data->regmap))
+		return dev_err_probe(&client->dev, PTR_ERR(data->regmap),
+				     "failed to register regmap\n");
+
+	data->vdd = devm_regulator_get(&client->dev, "vdd");
+	if (IS_ERR(data->vdd))
+		return dev_err_probe(&client->dev, PTR_ERR(data->vdd),
+				     "failed to get VDD regulator\n");
+
+	ret = regulator_enable(data->vdd);
+	if (ret)
+		return ret;
+
+	indio_dev->name = dev_name(&client->dev);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &si7210_info;
+	indio_dev->channels = si7210_channels;
+	indio_dev->num_channels = ARRAY_SIZE(si7210_channels);
+
+	ret = si7210_device_init(data);
+	if (ret)
+		return dev_err_probe(&client->dev, ret,
+				     "device initialization failed\n");
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id si7210_id[] = {
+	{ "si7210" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, si7210_id);
+
+static const struct of_device_id si7210_dt_ids[] = {
+	{ .compatible = "silabs,si7210" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, si7210_dt_ids);
+
+static struct i2c_driver si7210_driver = {
+	.driver = {
+		.name = "si7210",
+		.of_match_table = si7210_dt_ids,
+	},
+	.probe = si7210_probe,
+	.id_table = si7210_id,
+};
+module_i2c_driver(si7210_driver);
+
+MODULE_AUTHOR("Antoni Pokusinski <apokusinski01@gmail.com>");
+MODULE_DESCRIPTION("Silicon Labs Si7210 Hall Effect sensor I2C driver");
+MODULE_LICENSE("GPL");
-- 
2.25.1

Re: [PATCH v5 0/2] iio: magnetometer: add support for Si7210

[Jonathan Cameron]

On Mon, 20 Jan 2025 22:56:18 +0100
Antoni Pokusinski <apokusinski01@gmail.com> wrote:

> This patch series adds support for the Si7210 Hall effect I2C sensor.
> The driver currently supports the basic functionalities (i.e. making
> temperature and magnetic field measurements and changing the
> measurements scale) but I plan to add support for some other features in
> the future as well (e.g. the digital output interrupt).
> 
> ---
> Hi all,
> In this version I add only some minor tweaks and comments (for the
> temperature calculation) according to the latest review.
> Everything else was left intact.

Applied to the togreg branch of iio.git but initially only pushed out
as testing because I'll rebase on rc1 once available in about a week.

Thanks,

Jonathan