On Wed, Jun 19, 2024 at 02:49:02PM +0800, Kim Seer Paller wrote: > Add documentation for ltc2664. > > Co-developed-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > Signed-off-by: Kim Seer Paller <kimseer.paller@xxxxxxxxxx> > --- > .../bindings/iio/dac/adi,ltc2664.yaml | 167 ++++++++++++++++++ > MAINTAINERS | 8 + > 2 files changed, 175 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml > > diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml > new file mode 100644 > index 000000000000..be37700e3b1f > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml > @@ -0,0 +1,167 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/dac/adi,ltc2664.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Analog Devices LTC2664 DAC > + > +maintainers: > + - Michael Hennerich <michael.hennerich@xxxxxxxxxx> > + - Kim Seer Paller <kimseer.paller@xxxxxxxxxx> > + > +description: | > + Analog Devices LTC2664 4 channel, 12-/16-Bit, +-10V DAC > + https://www.analog.com/media/en/technical-documentation/data-sheets/2664fa.pdf > + > +properties: > + compatible: > + enum: > + - adi,ltc2664 > + > + reg: > + maxItems: 1 > + > + spi-max-frequency: > + maximum: 50000000 > + > + vcc-supply: > + description: Analog Supply Voltage Input. > + > + v-pos-supply: > + description: Positive Supply Voltage Input. > + > + v-neg-supply: > + description: Negative Supply Voltage Input. > + > + iovcc-supply: > + description: Digital Input/Output Supply Voltage. > + > + ref-supply: > + description: > + Reference Input/Output. The voltage at the REF pin sets the full-scale > + range of all channels. If not provided the internal reference is used and > + also provided on the VREF pin. > + > + reset-gpios: > + description: > + Active-low Asynchronous Clear Input. A logic low at this level-triggered > + input clears the part to the reset code and range determined by the > + hardwired option chosen using the MSPAN pins. The control registers are > + cleared to zero. > + maxItems: 1 > + > + adi,manual-span-operation-config: > + description: > + This property must mimic the MSPAN pin configurations. By tying the MSPAN > + pins (MSP2, MSP1 and MSP0) to GND and/or VCC, any output range can be > + hardware-configured with different mid-scale or zero-scale reset options. > + The hardware configuration is latched during power on reset for proper > + operation. > + 0 - MPS2=GND, MPS1=GND, MSP0=GND (+-10V, reset to 0V) > + 1 - MPS2=GND, MPS1=GND, MSP0=VCC (+-5V, reset to 0V) > + 2 - MPS2=GND, MPS1=VCC, MSP0=GND (+-2.5V, reset to 0V) > + 3 - MPS2=GND, MPS1=VCC, MSP0=VCC (0V to 10, reset to 0V) > + 4 - MPS2=VCC, MPS1=GND, MSP0=GND (0V to 10V, reset to 5V) > + 5 - MPS2=VCC, MPS1=GND, MSP0=VCC (0V to 5V, reset to 0V) > + 6 - MPS2=VCC, MPS1=VCC, MSP0=GND (0V to 5V, reset to 2.5V) > + 7 - MPS2=VCC, MPS1=VCC, MSP0=VCC (0V to 5V, reset to 0V, enables SoftSpan) > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1, 2, 3, 4, 5, 6, 7] Can you explain why this property is required, when below there's one that sets the ranges in microvolts? Isn't the only new information that this provides the reset values (in a few cases that it is not 0). What am I missing? > + default: 7 > + > + io-channels: > + description: > + ADC channel to monitor voltages and temperature at the MUXOUT pin. > + maxItems: 1 > + > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > +patternProperties: > + "^channel@[0-3]$": > + type: object > + additionalProperties: false > + > + properties: > + reg: > + description: The channel number representing the DAC output channel. > + maximum: 3 > + > + 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. > + type: boolean > + > + adi,output-range-microvolt: > + description: Specify the channel output full scale range. > + oneOf: > + - items: > + - const: 0 > + - enum: [5000000, 10000000] > + - items: > + - const: -5000000 > + - const: 5000000 > + - items: > + - const: -10000000 > + - const: 10000000 > + - items: > + - const: -2500000 > + - const: 2500000 > + > + required: > + - reg > + - adi,output-range-microvolt > + > +required: > + - compatible > + - reg > + - spi-max-frequency > + - vcc-supply > + - iovcc-supply > + - v-pos-supply > + - v-neg-supply > + > +allOf: > + - $ref: /schemas/spi/spi-peripheral-props.yaml# > + > +additionalProperties: false > + > +examples: > + - | > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + dac@0 { > + compatible = "adi,ltc2664"; > + reg = <0>; > + spi-max-frequency = <10000000>; > + > + vcc-supply = <&vcc>; > + iovcc-supply = <&vcc>; > + ref-supply = <&vref>; > + v-pos-supply = <&vpos>; > + v-neg-supply = <&vneg>; > + > + io-channels = <&adc 0>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + channel@0 { > + reg = <0>; > + adi,toggle-mode; > + adi,output-range-microvolt = <(-10000000) 10000000>; > + }; > + > + channel@1 { > + reg = <1>; > + adi,output-range-microvolt = <0 10000000>; > + }; > + }; > + }; > +... > diff --git a/MAINTAINERS b/MAINTAINERS > index be590c462d91..849800d9cbf7 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -13074,6 +13074,14 @@ S: Maintained > F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml > F: drivers/iio/dac/ltc1660.c > > +LTC2664 IIO DAC DRIVER > +M: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > +M: Kim Seer Paller <kimseer.paller@xxxxxxxxxx> > +L: linux-iio@xxxxxxxxxxxxxxx > +S: Supported > +W: https://ez.analog.com/linux-software-drivers > +F: Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml > + > LTC2688 IIO DAC DRIVER > M: Nuno Sá <nuno.sa@xxxxxxxxxx> > L: linux-iio@xxxxxxxxxxxxxxx > -- > 2.34.1 >
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