| Message ID | 20210105110839.5436-3-tomislav.denis@avl.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for ADS131E0x ADC family | expand |
On Tue, 5 Jan 2021 12:08:39 +0100 <tomislav.denis@avl.com> wrote: > From: Tomislav Denis <tomislav.denis@avl.com> > > Add a device tree binding documentation for Texas Instruments > ADS131E0x ADC family driver. > > Signed-off-by: Tomislav Denis <tomislav.denis@avl.com> One trivial thing inline. If that is all that comes up I can fix whilst applying. Thanks, Jonathan > --- > .../devicetree/bindings/iio/adc/ti,ads131e08.yaml | 181 +++++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 182 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml > > diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml > new file mode 100644 > index 0000000..c84eadd2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml > @@ -0,0 +1,181 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/adc/ti,ads131e08.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Texas Instruments ADS131E0x 4-, 6- and 8-Channel ADCs > + > +maintainers: > + - Tomislav Denis <tomislav.denis@avl.com> > + > +description: | > + The ADS131E0x are a family of multichannel, simultaneous sampling, > + 24-bit, delta-sigma, analog-to-digital converters (ADCs) with a > + built-in programmable gain amplifier (PGA), internal reference > + and an onboard oscillator. > + The communication with ADC chip is via the SPI bus (mode 1). > + > + https://www.ti.com/lit/ds/symlink/ads131e08.pdf > + > +properties: > + compatible: > + enum: > + - ti,ads131e04 > + - ti,ads131e06 > + - ti,ads131e08 > + > + reg: > + maxItems: 1 > + > + spi-max-frequency: true > + > + spi-cpha: true > + > + clocks: > + description: | > + Device tree identifier to the clock source (2.048 MHz). > + Note: clock source is selected using CLKSEL pin. > + maxItems: 1 > + > + clock-names: > + items: > + - const: adc-clk > + > + interrupts: > + description: | > + IRQ line for the ADC data ready. > + maxItems: 1 > + > + vref-supply: > + description: | > + Optional external voltage reference. If not supplied, internal voltage > + reference is used. > + > + ti,vref-internal: > + description: | > + Select the internal voltage reference value. > + 0: 2.4V > + 1: 4.0V > + If this field is left empty, 2.4V is selected. > + Note: internal voltage reference is used only if vref-supply is not supplied. > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1] > + default: 0 > + > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > +required: > + - compatible > + - reg > + - spi-cpha > + - clocks > + - clock-names > + - interrupts > + > +patternProperties: > + "^channel@([0-7])$": > + $ref: "adc.yaml" > + type: object > + description: | > + Represents the external channels which are connected to the ADC. > + > + properties: > + reg: > + description: | > + The channel number. > + Up to 4 channels, numbered from 0 to 3 for ti,ads131e04. > + Up to 6 channels, numbered from 0 to 5 for ti,ads131e06. > + Up to 8 channels, numbered from 0 to 7 for ti,ads131e08. > + items: > + minimum: 0 > + maximum: 8 7? > + > + ti,gain: > + description: | > + The PGA gain value for the channel. > + If this field is left empty, PGA gain 1 is used. > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [1, 2, 4, 8, 12] > + default: 1 > + > + ti,mux: > + description: | > + Channel input selection(muliplexer). > + 0: Normal input. > + 1: Input shorted to (VREFP + VREFN) / 2 (for offset or noise measurements). > + 3: MVDD (for supply measurement) > + 4: Temperature sensor > + If this field is left empty, normal input is selected. > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1, 3, 4] > + default: 0 > + > + required: > + - reg > + > + additionalProperties: false > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + > + adc@0 { > + compatible = "ti,ads131e08"; > + reg = <0>; > + spi-max-frequency = <1000000>; > + spi-cpha; > + clocks = <&clk2048k>; > + clock-names = "adc-clk"; > + interrupt-parent = <&gpio5>; > + interrupts = <28 IRQ_TYPE_EDGE_FALLING>; > + vref-supply = <&adc_vref>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + > + channel@0 { > + reg = <0>; > + }; > + > + channel@1 { > + reg = <1>; > + }; > + > + channel@2 { > + reg = <2>; > + ti,gain = <2>; > + }; > + > + channel@3 { > + reg = <3>; > + }; > + > + channel@4 { > + reg = <4>; > + }; > + > + channel@5 { > + reg = <5>; > + }; > + > + channel@6 { > + reg = <6>; > + }; > + > + channel@7 { > + reg = <7>; > + ti,mux = <4>; > + }; > + }; > + }; > diff --git a/MAINTAINERS b/MAINTAINERS > index 167aabf..f6c5e47 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -17371,6 +17371,7 @@ TI ADS131E0X ADC SERIES DRIVER > M: Tomislav Denis <tomislav.denis@avl.com> > L: linux-iio@vger.kernel.org > S: Maintained > +F: Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml > F: drivers/iio/adc/ti-ads131e08.c > > TI AM437X VPFE DRIVER
On Tue, Jan 5, 2021 at 5:26 AM <tomislav.denis@avl.com> wrote: > > From: Tomislav Denis <tomislav.denis@avl.com> > > Add a device tree binding documentation for Texas Instruments > ADS131E0x ADC family driver. > > Signed-off-by: Tomislav Denis <tomislav.denis@avl.com> > --- > .../devicetree/bindings/iio/adc/ti,ads131e08.yaml | 181 +++++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 182 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml new file mode 100644 index 0000000..c84eadd2 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml @@ -0,0 +1,181 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/ti,ads131e08.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments ADS131E0x 4-, 6- and 8-Channel ADCs + +maintainers: + - Tomislav Denis <tomislav.denis@avl.com> + +description: | + The ADS131E0x are a family of multichannel, simultaneous sampling, + 24-bit, delta-sigma, analog-to-digital converters (ADCs) with a + built-in programmable gain amplifier (PGA), internal reference + and an onboard oscillator. + The communication with ADC chip is via the SPI bus (mode 1). + + https://www.ti.com/lit/ds/symlink/ads131e08.pdf + +properties: + compatible: + enum: + - ti,ads131e04 + - ti,ads131e06 + - ti,ads131e08 + + reg: + maxItems: 1 + + spi-max-frequency: true + + spi-cpha: true + + clocks: + description: | + Device tree identifier to the clock source (2.048 MHz). + Note: clock source is selected using CLKSEL pin. + maxItems: 1 + + clock-names: + items: + - const: adc-clk + + interrupts: + description: | + IRQ line for the ADC data ready. + maxItems: 1 + + vref-supply: + description: | + Optional external voltage reference. If not supplied, internal voltage + reference is used. + + ti,vref-internal: + description: | + Select the internal voltage reference value. + 0: 2.4V + 1: 4.0V + If this field is left empty, 2.4V is selected. + Note: internal voltage reference is used only if vref-supply is not supplied. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + default: 0 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +required: + - compatible + - reg + - spi-cpha + - clocks + - clock-names + - interrupts + +patternProperties: + "^channel@([0-7])$": + $ref: "adc.yaml" + type: object + description: | + Represents the external channels which are connected to the ADC. + + properties: + reg: + description: | + The channel number. + Up to 4 channels, numbered from 0 to 3 for ti,ads131e04. + Up to 6 channels, numbered from 0 to 5 for ti,ads131e06. + Up to 8 channels, numbered from 0 to 7 for ti,ads131e08. + items: + minimum: 0 + maximum: 8 + + ti,gain: + description: | + The PGA gain value for the channel. + If this field is left empty, PGA gain 1 is used. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 2, 4, 8, 12] + default: 1 + + ti,mux: + description: | + Channel input selection(muliplexer). + 0: Normal input. + 1: Input shorted to (VREFP + VREFN) / 2 (for offset or noise measurements). + 3: MVDD (for supply measurement) + 4: Temperature sensor + If this field is left empty, normal input is selected. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 3, 4] + default: 0 + + required: + - reg + + additionalProperties: false + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "ti,ads131e08"; + reg = <0>; + spi-max-frequency = <1000000>; + spi-cpha; + clocks = <&clk2048k>; + clock-names = "adc-clk"; + interrupt-parent = <&gpio5>; + interrupts = <28 IRQ_TYPE_EDGE_FALLING>; + vref-supply = <&adc_vref>; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { + reg = <0>; + }; + + channel@1 { + reg = <1>; + }; + + channel@2 { + reg = <2>; + ti,gain = <2>; + }; + + channel@3 { + reg = <3>; + }; + + channel@4 { + reg = <4>; + }; + + channel@5 { + reg = <5>; + }; + + channel@6 { + reg = <6>; + }; + + channel@7 { + reg = <7>; + ti,mux = <4>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 167aabf..f6c5e47 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17371,6 +17371,7 @@ TI ADS131E0X ADC SERIES DRIVER M: Tomislav Denis <tomislav.denis@avl.com> L: linux-iio@vger.kernel.org S: Maintained +F: Documentation/devicetree/bindings/iio/adc/ti,ads131e08.yaml F: drivers/iio/adc/ti-ads131e08.c TI AM437X VPFE DRIVER