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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/iio/magnetometer/hmc5843_core.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Device driver for the the HMC5843 multi-chip module designed
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  * for low field magnetic sensing.
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@@ -8,16 +9,6 @@
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  * Acknowledgment: Jonathan Cameron <jic23@kernel.org> for valuable inputs.
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  * Support for HMC5883 and HMC5883L by Peter Meerwald <pmeerw@pmeerw.net>.
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  * Split to multiple files by Josef Gajdusek <atx@atx.name> - 2014
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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13
 
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 #include <linux/module.h>
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@@ -237,6 +228,15 @@
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 	return hmc5843_set_meas_conf(data, meas_conf);
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 }
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+static const struct iio_mount_matrix *
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+hmc5843_get_mount_matrix(const struct iio_dev *indio_dev,
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+			  const struct iio_chan_spec *chan)
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+{
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+	struct hmc5843_data *data = iio_priv(indio_dev);
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+
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+	return &data->orientation;
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+}
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+
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 static const struct iio_enum hmc5843_meas_conf_enum = {
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 	.items = hmc5843_meas_conf_modes,
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 	.num_items = ARRAY_SIZE(hmc5843_meas_conf_modes),
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@@ -245,9 +245,10 @@
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 };
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 static const struct iio_chan_spec_ext_info hmc5843_ext_info[] = {
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-	IIO_ENUM("meas_conf", true, &hmc5843_meas_conf_enum),
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+	IIO_ENUM("meas_conf", IIO_SHARED_BY_TYPE, &hmc5843_meas_conf_enum),
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 	IIO_ENUM_AVAILABLE("meas_conf", &hmc5843_meas_conf_enum),
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-	{ },
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+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix),
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+	{ }
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 };
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 static const struct iio_enum hmc5983_meas_conf_enum = {
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@@ -258,9 +259,10 @@
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 };
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 static const struct iio_chan_spec_ext_info hmc5983_ext_info[] = {
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-	IIO_ENUM("meas_conf", true, &hmc5983_meas_conf_enum),
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+	IIO_ENUM("meas_conf", IIO_SHARED_BY_TYPE, &hmc5983_meas_conf_enum),
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 	IIO_ENUM_AVAILABLE("meas_conf", &hmc5983_meas_conf_enum),
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-	{ },
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+	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, hmc5843_get_mount_matrix),
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+	{ }
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 };
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 static
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@@ -444,13 +446,13 @@
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 	}
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 	ret = regmap_bulk_read(data->regmap, HMC5843_DATA_OUT_MSB_REGS,
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-			       data->buffer, 3 * sizeof(__be16));
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+			       data->scan.chans, sizeof(data->scan.chans));
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450
 
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 	mutex_unlock(&data->lock);
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 	if (ret < 0)
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 		goto done;
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-	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
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+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
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 					   iio_get_time_ns(indio_dev));
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 done:
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@@ -635,7 +637,11 @@
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 	data->variant = &hmc5843_chip_info_tbl[id];
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 	mutex_init(&data->lock);
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-	indio_dev->dev.parent = dev;
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+	ret = iio_read_mount_matrix(dev, "mount-matrix",
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+				&data->orientation);
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+	if (ret)
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+		return ret;
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+
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 	indio_dev->name = name;
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 	indio_dev->info = &hmc5843_info;
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 	indio_dev->modes = INDIO_DIRECT_MODE;