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Mon, 22 Jun 2026 12:31:18 -0700 (PDT) From: Kurt Borja Date: Mon, 22 Jun 2026 14:30:46 -0500 Subject: [PATCH RFC v2 2/3] dt-bindings: iio: adc: Add excitation current sources properties 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: 7bit Message-Id: <20260622-new-channel-props-v2-2-aafd5369f253@gmail.com> References: <20260622-new-channel-props-v2-0-aafd5369f253@gmail.com> In-Reply-To: <20260622-new-channel-props-v2-0-aafd5369f253@gmail.com> To: Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Lechner Cc: =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Kurt Borja X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1676; i=kuurtb@gmail.com; h=from:subject:message-id; bh=dytCTAQzHC8hMl5sYZvCxtaRWqUzt7axoMBTmx/q3Sk=; b=owGbwMvMwCUmluBs8WX+lTTG02pJDFmWvQ27mZdsfOXoZCeqoNy7Ot3iU9Mb+aavk6at8rp9W eOHk35PRykLgxgXg6yYIkt7wqJvj6Ly3vodCL0PM4eVCWQIAxenAEzkRjPDX7Fny4oVY91b3vCe 1jv/ZtcrqZydlbef6Xzpyo+x399pKMfIcDFMo6ywJFfAeMp27unf702yd26frXjqidAWib4l937 +5AMA X-Developer-Key: i=kuurtb@gmail.com; a=openpgp; fpr=54D3BE170AEF777983C3C63B57E3B6585920A69A Some ADCs incorporate current sources that provide excitation current to resistive temperature devices (RTDs), thermistors, diodes and other resistive sensors that require constant current biasing. Signed-off-by: Kurt Borja --- Documentation/devicetree/bindings/iio/adc/adc.yaml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml index fdad6b8276c934c..160a8cfa9842a86 100644 --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml @@ -86,6 +86,25 @@ properties: source. If two values are provided, the first one corresponds to the positive source and the second to the negative source. + excitation-channels: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Excitation current sources provide current to resistive temperature + devices (RTDs), thermistors, diodes and other resistive sensors that + require constant current biasing. + + This array describes the mux configuration of the excitation current + sources. + + excitation-current-microamp: + description: + Excitation current sources provide current to resistive temperature + devices (RTDs), thermistors, diodes and other resistive sensors that + require constant current biasing. + + This array describes the current configuration of the excitation current + sources or the single matched current for all sources. + anyOf: - oneOf: - required: -- 2.54.0