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Fri, 12 Jun 2026 15:47:02 -0700 (PDT) From: Kurt Borja Date: Fri, 12 Jun 2026 17:46:19 -0500 Subject: [PATCH 1/5] dt-bindings: iio: adc: Add TI ADS126x ADC family 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: 8bit Message-Id: <20260612-ads126x-v1-1-894c788d03ed@gmail.com> References: <20260612-ads126x-v1-0-894c788d03ed@gmail.com> In-Reply-To: <20260612-ads126x-v1-0-894c788d03ed@gmail.com> To: Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski Cc: David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Kurt Borja , Jonathan Cameron X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=10990; i=kuurtb@gmail.com; h=from:subject:message-id; bh=wPe+MCGV7y8p2VWX5tNsJUlFInLquvWFNJQafrXkt8k=; b=owGbwMvMwCUmluBs8WX+lTTG02pJDFk6PUnTRJR7nf5drStyczgZVCfYKLl+gtOnH7YvhOSTs 67W35raUcrCIMbFICumyNKesOjbo6i8t34HQu/DzGFlAhnCwMUpABNZ0s/wT3F91lqm2v0qbpeX VEi+jvm5/NKn3Ml8TysePRDzDJqrnczwP+qDGE9UT9fO21ejZ7oUayxmv32UUdlvS863Vtm3Mzm VGAE= X-Developer-Key: i=kuurtb@gmail.com; a=openpgp; fpr=54D3BE170AEF777983C3C63B57E3B6585920A69A Add TI ADS1262 and TI ADS1263 ADC2 devicetree bindings documentation. Signed-off-by: Kurt Borja --- .../devicetree/bindings/iio/adc/ti,ads1262.yaml | 308 +++++++++++++++++++++ .../bindings/iio/adc/ti,ads1263-adc2.yaml | 49 ++++ MAINTAINERS | 7 + 3 files changed, 364 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1262.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads1262.yaml new file mode 100644 index 000000000000..1c4fde94f6c7 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1262.yaml @@ -0,0 +1,308 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/ti,ads1262.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI ADS1262/ADS1263 analog to digital converter + +maintainers: + - Kurt Borja + +description: | + The ADS1262 and ADS1263 are 38.4-kSPS, delta-sigma (ΔΣ) ADCs with an + integrated PGA, reference, and internal fault monitors. The ADS1263 integrates + an auxiliary, 24-bit, ΔΣ ADC intended for background measurements. + + Datasheets: + - ADS126x: https://www.ti.com/lit/ds/symlink/ads1262.pdf + +properties: + compatible: + enum: + - ti,ads1262 + - ti,ads1263 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + spi-max-frequency: + maximum: 8000000 + + spi-cpha: true + + interrupts: + description: Data ready (DRDY) interrupt line. + maxItems: 1 + + start-gpios: + description: Start conversion control. + maxItems: 1 + + reset-gpios: + maxItems: 1 + + dvdd-supply: + description: Digital power supply. + + avdd-supply: + description: Analog power supply. + + vref-supply: + description: Optional external voltage reference. + + ti,pos-refmux: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the positive voltage reference input: + 0: Internal 2.5 V reference + 1: AIN0 pin + 2: AIN2 pin + 3: AIN4 pin + 4: AVDD pin + minimum: 0 + maximum: 4 + default: 0 + + ti,neg-refmux: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the negative voltage reference input: + 0: Internal 2.5 V reference + 1: AIN1 pin + 2: AIN3 pin + 3: AIN5 pin + 4: AVSS pin + minimum: 0 + maximum: 4 + default: 0 + + ti,vbias: + $ref: /schemas/types.yaml#/definitions/flag + description: Enables the level-shift voltage on the AINCOM pin. + default: false + + ti,idac1-pin: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the analog input pin to connect IDAC1: + 0: AIN0 + 1: AIN1 + 2: AIN2 + 3: AIN3 + 4: AIN4 + 5: AIN5 + 6: AIN6 + 7: AIN7 + 8: AIN8 + 9: AIN9 + 10: AINCOM + 11: No Connection + minimum: 0 + maximum: 11 + default: 11 + + ti,idac1-microamp: + description: Selects the current values of IDAC1. + enum: [0, 50, 100, 250, 500, 750, 1000, 1500, 2000, 2500, 3000] + default: 0 + + ti,idac2-pin: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the analog input pin to connect IDAC2: + 0: AIN0 + 1: AIN1 + 2: AIN2 + 3: AIN3 + 4: AIN4 + 5: AIN5 + 6: AIN6 + 7: AIN7 + 8: AIN8 + 9: AIN9 + 10: AINCOM + 11: No Connection + minimum: 0 + maximum: 11 + default: 11 + + ti,idac2-microamp: + description: Selects the current values of IDAC2. + enum: [0, 50, 100, 250, 500, 750, 1000, 1500, 2000, 2500, 3000] + default: 0 + + clocks: + maxItems: 1 + + '#io-channel-cells': + const: 1 + + '#gpio-cells': + const: 2 + + gpio-controller: true + + adc: + $ref: /schemas/iio/adc/ti,ads1263-adc2.yaml# + +required: + - compatible + - reg + - avdd-supply + - dvdd-supply + - '#address-cells' + - '#size-cells' + +unevaluatedProperties: false + +patternProperties: + "^channel@[0-9]+$": + $ref: /schemas/iio/adc/adc.yaml# + additionalProperties: false + + properties: + reg: + maxItems: 1 + + diff-channels: + description: | + Selects the analog input configuration for this channel. The first + value is the positive input and the second is the negative input. + The following values are available: + 0: AIN0 pin + 1: AIN1 pin + 2: AIN2 pin + 3: AIN3 pin + 4: AIN4 pin + 5: AIN5 pin + 6: AIN6 pin + 7: AIN7 pin + 8: AIN8 pin + 9: AIN9 pin + 10: AINCOM pin + 11: Temperature sensor monitor + 12: Analog power supply monitor + 13: Digital power supply monitor + 14: TDAC test signal + 15: Float (open connection) + items: + minimum: 0 + maximum: 15 + + ti,chop-mode: + $ref: /schemas/types.yaml#/definitions/flag + description: + When enabled, the ADC performs two internal conversions to cancel the + input offset voltage. The first conversion is taken with normal input + polarity. The ADC reverses the internal input polarity for the second + conversion. The difference of the two conversions is computed to yield + the final corrected result with the offset voltage removed. + default: false + + ti,idac-rotation-mode: + $ref: /schemas/types.yaml#/definitions/flag + description: + The rotation mode automatically swaps the IDAC1 and IDAC2 connections + of alternate conversions. The ADC averages the alternate conversions + to eliminate IDAC mismatch. + default: false + + ti,pga-bypass: + $ref: /schemas/types.yaml#/definitions/flag + description: Bypass the Programmable Gain Amplifier (PGA). + default: false + + ti,rev-vref-pol: + $ref: /schemas/types.yaml#/definitions/flag + description: + The reference polarity can be negative, but the ADC requires a + positive voltage reference. In this case, the reference + polarity-reversal switch changes the reference polarity from negative + to positive. + default: false + + ti,sbias-connection: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the sensor bias current source connection: + 0: Sensor bias connected to ADC1 mux out + 1: Sensor bias connected to ADC2 mux out + minimum: 0 + maximum: 1 + default: 0 + + ti,sbias-polarity: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the sensor bias current source polarity: + 0: Sensor bias pull-up + 1: Sensor bias pull-down + minimum: 0 + maximum: 1 + default: 0 + + ti,sbias-magnitude: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the sensor bias magnitude: + 0: No sensor bias current or resistor + 1: 0.5-uA sensor bias current + 2: 2-uA sensor bias current + 3: 10-uA sensor bias current + 4: 50-uA sensor bias current + 5: 200-uA sensor bias current + 6: 10-Mohm resistor + minimum: 0 + maximum: 6 + default: 0 + + required: + - reg + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +examples: + - | + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "ti,ads1263"; + reg = <0>; + spi-max-frequency = <8000000>; + spi-cpha; + avdd-supply = <&avdd>; + dvdd-supply = <&dvdd>; + #address-cells = <1>; + #size-cells = <0>; + + reset-gpios = <&gpio 18 GPIO_ACTIVE_LOW>; + + /* AINP: 0 - AINN: AINCOM */ + channel@0 { + reg = <0>; + diff-channels = <0x0 0xA>; + }; + + /* Temperature sensor monitor */ + channel@1 { + reg = <1>; + diff-channels = <0xB 0xB>; + }; + + adc { + compatible = "ti,ads1263-adc2"; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1263-adc2.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads1263-adc2.yaml new file mode 100644 index 000000000000..9dd5577589b1 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1263-adc2.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/ti,ads1263-adc2.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI ADS1263 ADC2 analog-to-digital converter + +maintainers: + - Kurt Borja + +description: + The ADS1263 includes an auxiliary, 24-bit, delta-sigma ADC (ADC2). ADC2 + operation is independent of ADC1, with independent selections of input + channel, reference voltage, sample rate, and channel gain. + +properties: + compatible: + enum: + - ti,ads1263-adc2 + vref-supply: + description: Optional external voltage reference. + + ti,refmux: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Selects the positive voltage reference input: + 0: Internal 2.5 V reference + 1: AIN0-AIN1 pins + 2: AIN2-AIN3 pins + 3: AIN4-AIN5 pins + 4: AVDD-AVSS pins + minimum: 0 + maximum: 4 + default: 0 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + '#io-channel-cells': + const: 1 + +required: + - compatible + +additionalProperties: false diff --git a/MAINTAINERS b/MAINTAINERS index 396d4e76dccc..9379699d99c6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -26668,6 +26668,13 @@ S: Maintained F: Documentation/devicetree/bindings/iio/adc/ti,ads1018.yaml F: drivers/iio/adc/ti-ads1018.c +TI ADS1262 ADC DRIVER +M: Kurt Borja +L: linux-iio@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/iio/adc/ti,ads1262.yaml +F: Documentation/devicetree/bindings/iio/adc/ti,ads1263-adc2.yaml + TI ADS7924 ADC DRIVER M: Hugo Villeneuve L: linux-iio@vger.kernel.org -- 2.54.0