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Fri, 25 Apr 2025 14:54:18 -0700 (PDT) Received: from localhost ([2409:40c0:2025:2c31:c6a3:5653:2e03:8d7a]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-309f7749938sm2211580a91.11.2025.04.25.14.54.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Apr 2025 14:54:18 -0700 (PDT) From: surajsonawane0215@gmail.com To: jic23@kernel.org Cc: surajsonawane0215@gmail.com, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: iio: chemical: Add sharp,gp2y1010au0f Date: Sat, 26 Apr 2025 03:21:49 +0530 Message-Id: <20250425215149.49068-1-surajsonawane0215@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=y Content-Transfer-Encoding: 8bit From: Suraj Sonawane Add Device Tree bindings for Sharp GP2Y1010AU0F optical dust sensor. The sensor measures particulate matter concentration via infrared scattering and requires: 1. GPIO for LED pulse control (280μs pulses with 40μs delay) 2. ADC channel for analog output measurement 3. Power regulator (vdd-supply) Datasheet: https://global.sharp/products/device/lineup/data/pdf/datasheet/gp2y1010au_appl_e.pdf Signed-off-by: Suraj Sonawane --- .../iio/chemical/sharp,gp2y1010au0f.yaml | 67 +++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml diff --git a/Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml b/Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml new file mode 100644 index 000000000..358c2b2f7 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml @@ -0,0 +1,67 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/chemical/sharp,gp2y1010au0f.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sharp GP2Y1010AU0F Optical Dust Sensor + +maintainers: + - Suraj Sonawane + +description: | + Optical dust sensor measuring particulate matter concentration via infrared scattering. + Requires ADC for analog output and GPIO for pulsed LED control with strict timing. + Datasheet: https://global.sharp/products/device/lineup/data/pdf/datasheet/gp2y1010au_appl_e.pdf + +properties: + compatible: + const: sharp,gp2y1010au0f + + vdd-supply: + description: Phandle to the regulator that provides power to the sensor + + led-gpios: + description: GPIO connected to the sensor's LED control pin (V-LED) + maxItems: 1 + + io-channels: + description: ADC channel connected to the sensor's analog output (Vo) + maxItems: 1 + + io-channel-names: + const: dust + + sharp,led-on-delay-us: + description: Time in microseconds to wait after turning LED on before ADC read + default: 40 + minimum: 0 + maximum: 100 + + sharp,measurement-window-us: + description: Measurement window in microseconds after LED turn-on + default: 200 + minimum: 0 + maximum: 280 + +required: + - compatible + - led-gpios + - io-channels + - io-channel-names + +additionalProperties: false + +examples: + - | + #include + + dust_sensor { + compatible = "sharp,gp2y1010au0f"; + vdd-supply = <&vcc>; + led-gpios = <&gpio 44 GPIO_ACTIVE_HIGH>; + io-channels = <&adc 0>; + io-channel-names = "dust"; + sharp,led-on-delay-us = <40>; + sharp,measurement-window-us = <200>; + }; -- 2.34.1