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[78.94.0.51]) by smtp.gmail.com with ESMTPSA id un2-20020a170907cb8200b00a30cd599285sm993438ejc.223.2024.02.06.02.55.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Feb 2024 02:55:10 -0800 (PST) From: Naresh Solanki To: Peter Rosin , Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: mazziesaccount@gmail.com, Naresh Solanki , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4] dt-bindings: iio: afe: voltage-divider: Add io-channel-cells Date: Tue, 6 Feb 2024 16:25:01 +0530 Message-ID: <20240206105502.648255-1-naresh.solanki@9elements.com> X-Mailer: git-send-email 2.42.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790146746016880226 X-GMAIL-MSGID: 1790146746016880226 Enable the voltage divider to both receive and provide measurement services by adding #io-channel-cells. This is especially valuable in scenarios where an ADC has an analog frontend, like a voltage divider, and obtaining its raw value isn't interesting. It is desired to get the real voltage before the voltage divider. Signed-off-by: Naresh Solanki Reviewed-by: Conor Dooley --- .../devicetree/bindings/iio/afe/voltage-divider.yaml | 11 +++++++++++ 1 file changed, 11 insertions(+) base-commit: 99bd3cb0d12e85d5114425353552121ec8f93adc diff --git a/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml b/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml index dddf97b50549..fd3c511e1beb 100644 --- a/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml +++ b/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml @@ -39,6 +39,17 @@ properties: description: | Channel node of a voltage io-channel. + '#io-channel-cells': + description: + In addition to consuming the measurement services of a voltage + output channel, the voltage divider can act as a provider of + measurement services to other devices. This is particularly + useful in scenarios wherein an ADC has an analog frontend, + such as a voltage divider, and then consuming its raw value + isn't interesting. It is desired to get the real voltage + before the voltage divider. + const: 1 + output-ohms: description: Resistance Rout over which the output voltage is measured. See full-ohms.