iio: amplifiers: ad8366: make ad8366_info const

Add const qualifier to struct ad8366_info ad8366_infos[]. This
is read-only data so it can be made const.

Signed-off-by: David Lechner <dlechner@bayl

iio: amplifiers: ad8366: make ad8366_info const

Add const qualifier to struct ad8366_info ad8366_infos[]. This
is read-only data so it can be made const.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250628-iio-const-data-12-v1-1-88029e48a26b@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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iio: amplifiers: ada4250: use dev_err_probe()

Use dev_err_probe() when returning an error in the probe function.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <a

iio: amplifiers: ada4250: use dev_err_probe()

Use dev_err_probe() when returning an error in the probe function.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-amplifiers-ada4250-simplify-data-buffer-in-init-v3-5-bf85ddea79f2@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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iio: amplifiers: ada4250: move offset_uv in struct

Move offset_uv in struct ada4250_state. This keeps things logically
grouped and reduces holes in the struct.

Signed-off-by: David Lechner <dlechne

iio: amplifiers: ada4250: move offset_uv in struct

Move offset_uv in struct ada4250_state. This keeps things logically
grouped and reduces holes in the struct.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-amplifiers-ada4250-simplify-data-buffer-in-init-v3-4-bf85ddea79f2@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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iio: amplifiers: ada4250: use devm_regulator_get_enable_read_voltage()

Use devm_regulator_get_enable_read_voltage() to simplify the code.

Replace 1000000 with MICRO while we are touching this for b

iio: amplifiers: ada4250: use devm_regulator_get_enable_read_voltage()

Use devm_regulator_get_enable_read_voltage() to simplify the code.

Replace 1000000 with MICRO while we are touching this for better
readability.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-amplifiers-ada4250-simplify-data-buffer-in-init-v3-3-bf85ddea79f2@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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iio: amplifiers: ada4250: don't fail on bad chip ID

Only print an information message instead of error message and failing
to probe the device if the chip ID is not recognized. Experience shows
that

iio: amplifiers: ada4250: don't fail on bad chip ID

Only print an information message instead of error message and failing
to probe the device if the chip ID is not recognized. Experience shows
that this can be fragile and some devices may not return the expected
chip ID even though the driver is still able to work with them.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Closes: https://lore.kernel.org/linux-iio/20250421122409.79f5580c@jic23-huawei/
Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-amplifiers-ada4250-simplify-data-buffer-in-init-v3-2-bf85ddea79f2@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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iio: amplifiers: ada4250: used dev local variable

Replace local spi variable with dev in ada4250_init() since spi is not
used directly.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed

iio: amplifiers: ada4250: used dev local variable

Replace local spi variable with dev in ada4250_init() since spi is not
used directly.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-amplifiers-ada4250-simplify-data-buffer-in-init-v3-1-bf85ddea79f2@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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iio: amplifiers: ada4250: use DMA-safe memory for regmap_bulk_read()

Use DMA-safe memory instead of stack-allocated memory for the call to
regmap_bulk_read() in the ada4250_init() function as this c

iio: amplifiers: ada4250: use DMA-safe memory for regmap_bulk_read()

Use DMA-safe memory instead of stack-allocated memory for the call to
regmap_bulk_read() in the ada4250_init() function as this could be used
directly by a SPI controller.

Also remove unnecessary use of get_unaligned_le16() and explicitly
include linux/types.h e.g. for __le16 while we are fixing this up.

Note this is DMA issue does not appear to be an actual bug due to
internals of the regmap SPI implementation. However, for IIO we are
following guidance that we should not make that assumption.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250418-iio-amplifiers-ada4250-simplify-data-buffer-in-init-v1-1-7e7bd6dad423@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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