This is a note to let you know that I've just added the patch titled

docs: iio: ad7380: fix supply for ad7380-4

to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 795114e849ddfd48150eb0135d04748a8c81cec5 Mon Sep 17 00:00:00 2001 From: Julien Stephan jstephan@baylibre.com Date: Tue, 22 Oct 2024 15:22:40 +0200 Subject: docs: iio: ad7380: fix supply for ad7380-4

ad7380-4 is the only device from ad738x family that doesn't have an internal reference. Moreover it's external reference is called REFIN in the datasheet while all other use REFIO as an optional external reference. Update documentation to highlight this.

Fixes: 3e82dfc82f38 ("docs: iio: new docs for ad7380 driver") Reviewed-by: David Lechner dlechner@baylibre.com Signed-off-by: Julien Stephan jstephan@baylibre.com Link: https://patch.msgid.link/20241022-ad7380-fix-supplies-v3-5-f0cefe1b7fa6@bayl... Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- Documentation/iio/ad7380.rst | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/Documentation/iio/ad7380.rst b/Documentation/iio/ad7380.rst index 9c784c1e652e..6f70b49b9ef2 100644 --- a/Documentation/iio/ad7380.rst +++ b/Documentation/iio/ad7380.rst @@ -41,13 +41,22 @@ supports only 1 SDO line. Reference voltage -----------------

-2 possible reference voltage sources are supported: +ad7380-4 +~~~~~~~~ + +ad7380-4 supports only an external reference voltage (2.5V to 3.3V). It must be +declared in the device tree as ``refin-supply``. + +All other devices from ad738x family +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +All other devices from ad738x support 2 possible reference voltage sources:

- Internal reference (2.5V) - External reference (2.5V to 3.3V)

The source is determined by the device tree. If ``refio-supply`` is present, -then the external reference is used, else the internal reference is used. +then it is used as external reference, else the internal reference is used.

Oversampling and resolution boost ---------------------------------