On Tue, Dec 14, 2021 at 05:56:08PM +0100, Nuno Sá wrote: > Document the LTC2688 devicetree properties. > > Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx> > --- > .../bindings/iio/dac/adi,ltc2688.yaml | 146 ++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 147 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml > > diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml > new file mode 100644 > index 000000000000..7919cd8ec7c9 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml > @@ -0,0 +1,146 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/dac/adi,ltc2688.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Analog Devices LTC2688 DAC > + > +maintainers: > + - Nuno Sá <nuno.sa@xxxxxxxxxx> > + > +description: | > + Analog Devices LTC2688 16 channel, 16 bit, +-15V DAC > + https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2688.pdf > + > +properties: > + compatible: > + enum: > + - adi,ltc2688 > + > + reg: > + maxItems: 1 > + > + vcc-supply: > + description: Analog Supply Voltage Input. > + > + iovcc-supply: > + description: Digital Input/Output Supply Voltage. > + > + vref-supply: > + description: > + Reference Input/Output. The voltage at the REF pin sets the full-scale > + range of all channels. By default, the internal reference is routed to > + this pin. > + > + reset-gpios: > + description: > + If specified, it will be asserted during driver probe. As the line is > + active low, it should be marked GPIO_ACTIVE_LOW. > + maxItems: 1 > + > + clocks: > + minItems: 1 > + maxItems: 3 > + > + clock-names: > + minItems: 1 > + maxItems: 3 > + items: > + enum: [TGP1, TGP2, TGP3] pattern: '^TGP[1-3]$' > + > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > +patternProperties: > + "^channel@([0-9]|1[0-5])$": > + type: object > + > + properties: > + reg: > + description: The channel number representing the DAC output channel. > + maximum: 15 > + > + adi,toggle-mode: > + description: > + Set the channel as a toggle enabled channel. Toggle operation enables > + fast switching of a DAC output between two different DAC codes without > + any SPI transaction. It will result in a different ABI for the > + channel. > + type: boolean > + > + adi,output-range-millivolt: Not one of the defined units. Use '-microvolt' > + description: > + Specify the channel output full scale range. Allowed values are > + <0 5000> > + <0 10000> > + <-5000 5000> > + <-10000 10000> > + <-15000 15000> Looks like constraints. items: - enum: [ -15000, -10000, -5000, 0 ] - enum: [ 5000, 10000, 15000 ] though that will need to all be x1000. > + $ref: /schemas/types.yaml#/definitions/int32-array And drop the type. > + > + adi,overrange: > + description: Enable 5% overrange over the selected full scale range. > + type: boolean > + > + adi,toggle-dither-input: > + description: > + Selects the TGPx pin to be associated with this channel. This setting > + only makes sense for toggle or dither enabled channels. If > + @adi,toggle-mode is not set and this property is given, the channel is > + assumed to be a dither capable channel. Note that multiple channels > + can be mapped to the same pin. If this setting is given, the > + respective @clock must also be provided. Mappings between this and > + clocks > + 0 - TGP1 > + 1 - TGP2 > + 2 - TGP3 > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1, 2] > + > + required: > + - reg > + > +required: > + - compatible > + - reg > + > +additionalProperties: false > + > +examples: > + - | > + > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + ltc2688: ltc2688@0 { > + compatible = "adi,ltc2688"; > + reg = <0>; > + > + vcc-supply = <&vcc>; > + iovcc-supply = <&vcc>; > + vref-supply = <&vref>; > + > + clocks = <&clock_tgp2>; > + clock-names = "TGP2"; > + > + #address-cells = <1>; > + #size-cells = <0>; > + channel@0 { > + reg = <0>; > + adi,toggle-mode; > + adi,overrange; > + }; > + > + channel@1 { > + reg = <1>; > + adi,output-range-millivolt = <(-10000) 10000>; > + adi,toggle-dither-input = <2>; > + }; > + }; > + }; > + > +... > diff --git a/MAINTAINERS b/MAINTAINERS > index 61b1eaad4611..4ee2a1b6bf62 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -11168,6 +11168,7 @@ L: linux-iio@xxxxxxxxxxxxxxx > S: Supported > W: http://ez.analog.com/community/linux-device-drivers > F: Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 > +F: Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml > F: drivers/iio/dac/ltc2688.c > > LTC2947 HARDWARE MONITOR DRIVER > -- > 2.17.1 > >
