On Tue, Aug 27, 2024 at 12:49:18PM +0300, Nikita Shubin via B4 Relay wrote: > From: Nikita Shubin <nikita.shubin@xxxxxxxxxxx> > > Convert the Cirrus Logic CS4271 audio CODEC bindings to DT schema. > > Add missing spi-cpha, spi-cpol, '#sound-dai-cells' and port, as they > are already being used in the DTS and the driver for this device. > > Based on Animesh Agarwal cs42xx8 conversion patch. > > Keep the original 'reset-gpio' used in bindings, > instead of 'reset-gpios' used in cs42xx8. > > Cc: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx> > Link: https://lore.kernel.org/all/20240715-ep93xx-v11-0-4e924efda795@xxxxxxxxxxx > Signed-off-by: Nikita Shubin <nikita.shubin@xxxxxxxxxxx> > --- > This is complementary patch to ep93xx DT conversion series. > > Based on "ASoC: dt-bindings: cirrus,cs4270: Convert to dtschema" patch. > > Krzysztof, thank you very much for quick review! > --- > Changes in v2: > Krzysztof Kozlowski: > - fix SoB above link > - replace 'driver' with 'device' > - mention properties not present in original bindings > - mention using 'gpio-reset' instead of 'gpios-reset' > - dropped unused label > - use defines for gpio bindings > - newline at end of file > - Link to v1: https://lore.kernel.org/r/20240826-cs4271-yaml-v1-1-dad3f0b041ef@xxxxxxxxxxx > --- > .../devicetree/bindings/sound/cirrus,cs4271.yaml | 101 +++++++++++++++++++++ > Documentation/devicetree/bindings/sound/cs4271.txt | 57 ------------ > 2 files changed, 101 insertions(+), 57 deletions(-) > > diff --git a/Documentation/devicetree/bindings/sound/cirrus,cs4271.yaml b/Documentation/devicetree/bindings/sound/cirrus,cs4271.yaml > new file mode 100644 > index 000000000000..cc5b48ceafa4 > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/cirrus,cs4271.yaml > @@ -0,0 +1,101 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/sound/cirrus,cs4271.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Cirrus Logic CS4271 audio CODEC > + > +maintainers: > + - Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx> > + - Nikita Shubin <nikita.shubin@xxxxxxxxxxx> > + > +description: > + The CS4271 is a stereo audio codec. This device supports both the I2C > + and the SPI bus. > + > +allOf: > + - $ref: dai-common.yaml# > + - $ref: /schemas/spi/spi-peripheral-props.yaml# > + > +properties: > + compatible: > + const: cirrus,cs4271 > + > + reg: > + maxItems: 1 > + > + spi-cpha: true > + > + spi-cpol: true > + > + '#sound-dai-cells': > + const: 0 > + > + reset-gpio: I wasn't clear... reset-gpios and mention that you switched to non-deprecated gpios suffix. > + description: > + This pin will be deasserted before communication to the codec starts. > + maxItems: 1 > + > + va-supply: > + description: Analog power supply. > + > + vd-supply: > + description: Digital power supply. > + > + vl-supply: > + description: Serial Control Port power supply. > + > + port: > + $ref: audio-graph-port.yaml# > + unevaluatedProperties: false > + > + cirrus,amuteb-eq-bmutec: > + description: > + When given, the Codec's AMUTEB=BMUTEC flag is enabled. > + type: boolean > + > + cirrus,enable-soft-reset: > + description: | > + The CS4271 requires its LRCLK and MCLK to be stable before its RESET > + line is de-asserted. That also means that clocks cannot be changed > + without putting the chip back into hardware reset, which also requires > + a complete re-initialization of all registers. > + > + One (undocumented) workaround is to assert and de-assert the PDN bit > + in the MODE2 register. This workaround can be enabled with this DT > + property. > + > + Note that this is not needed in case the clocks are stable > + throughout the entire runtime of the codec. > + type: boolean > + > +required: > + - compatible > + - reg > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + cs4271@0 { Node names should be generic. See also an explanation and list of examples (not exhaustive) in DT specification: https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation audio-codec or codec Best regards, Krzysztof
