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Fri, 19 Dec 2025 13:33:35 -0800 (PST) From: David Lechner Date: Fri, 19 Dec 2025 15:32:16 -0600 Subject: [PATCH v4 8/9] dt-bindings: iio: adc: adi,ad7380: add spi-rx-bus-width property Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251219-spi-add-multi-bus-support-v4-8-145dc5204cd8@baylibre.com> References: <20251219-spi-add-multi-bus-support-v4-0-145dc5204cd8@baylibre.com> In-Reply-To: <20251219-spi-add-multi-bus-support-v4-0-145dc5204cd8@baylibre.com> To: Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Marcelo Schmitt , Michael Hennerich , =?utf-8?q?Nuno_S=C3=A1?= , Jonathan Cameron , Andy Shevchenko Cc: Sean Anderson , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, David Lechner X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1994; i=dlechner@baylibre.com; h=from:subject:message-id; bh=VQOPaqQmoNwtfxLbCSXG6BhStJUeMtFzJ0prIuJB4JY=; b=owGbwMvMwMV46IwC43/G/gOMp9WSGDJdj8x4ylQ589TTfacs62zckqz2Ftiw2V77mJYWu/bgq w/+tYsyOhmNWRgYuRhkxRRZ3kjcnJfE13xtzo2MGTCDWJlApjBwcQrARJLt2f8nbY/dJ2r7o6ss aqLRboWsvRb9e99U77iS53ubY6mUBEOPqVcD02a3roS3N24zbC+ujhMqz5Jh/MkjxiJtcfnHlMk zTOdLLM6qrZzkWxf4b/7TiybBBQnTNrrILXS64F8a21++6a3oztkttS/P/PJa9mmt3ZJ7go9YGK QVH94TKUhMU21pEvn486BYRmiamG8kC/MrkZNrG34mu8/cmdIjn9nhFxlsvYL3yaz8pgk1N60zY ybYTUq7ZKXyVyug/ORLXquoxnCWU45HtvyU9NpcrtZutTmYpzHfwDhxwaWc/KrX8828t6Q+6d7x v+xx81Xus4eS252a1PkYrZYU7GRx23vIbk+pn92SNOXlAA== X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Add spi-rx-bus-width property to describe how many SDO lines are wired up on the ADC. These chips are simultaneous sampling ADCs and have one SDO line per channel, either 2 or 4 total depending on the part number. Signed-off-by: David Lechner Reviewed-by: Rob Herring (Arm) --- v4 changes: * Change to use spi-rx-bus-width property instead of spi-lanes. v3 changes: * Renamed "buses" to "lanes" to reflect devicetree property name change. --- .../devicetree/bindings/iio/adc/adi,ad7380.yaml | 23 ++++++++++++++++++= ++++ 1 file changed, 23 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml b/Do= cumentation/devicetree/bindings/iio/adc/adi,ad7380.yaml index b91bfb16ed6b..396e1a1aa805 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml @@ -62,6 +62,11 @@ properties: spi-cpol: true spi-cpha: true =20 + spi-rx-bus-width: + maxItems: 4 + items: + maximum: 1 + vcc-supply: description: A 3V to 3.6V supply that powers the chip. =20 @@ -160,6 +165,23 @@ patternProperties: unevaluatedProperties: false =20 allOf: + # 2-channel chips only have two SDO lines + - if: + properties: + compatible: + enum: + - adi,ad7380 + - adi,ad7381 + - adi,ad7383 + - adi,ad7384 + - adi,ad7386 + - adi,ad7387 + - adi,ad7388 + then: + properties: + spi-rx-bus-width: + maxItems: 2 + # pseudo-differential chips require common mode voltage supplies, # true differential chips don't use them - if: @@ -284,6 +306,7 @@ examples: spi-cpol; spi-cpha; spi-max-frequency =3D <80000000>; + spi-rx-bus-width =3D <1>, <1>, <1>, <1>; =20 interrupts =3D <27 IRQ_TYPE_EDGE_FALLING>; interrupt-parent =3D <&gpio0>; --=20 2.43.0