Re: [alsa-devel] [PATCH 1/2] bindings: sound: pcm3168a: Document optional RST gpio

On Wed, Nov 13, 2019 at 02:47:33PM +0200, Peter Ujfalusi wrote:

On boards where the RST line is not pulled up, but it is connected to a GPIO line this property must present in order to be able to enable the codec.

Signed-off-by: Peter Ujfalusi peter.ujfalusi@ti.com

Documentation/devicetree/bindings/sound/ti,pcm3168a.txt | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/ti,pcm3168a.txt b/Documentation/devicetree/bindings/sound/ti,pcm3168a.txt index 5d9cb84c661d..f30aebc7603a 100644 --- a/Documentation/devicetree/bindings/sound/ti,pcm3168a.txt +++ b/Documentation/devicetree/bindings/sound/ti,pcm3168a.txt @@ -25,6 +25,12 @@ Required properties:

For required properties on SPI/I2C, consult SPI/I2C device tree documentation

+Optional properties:

• • rst-gpios : Optional RST gpio line for the codec

• RST = low: device power-down
  

• RST = high: device is enabled
  

'reset-gpios' is the standard naming for reset lines.

Examples:

i2c0: i2c0@0 { @@ -34,6 +40,7 @@ i2c0: i2c0@0 { pcm3168a: audio-codec@44 { compatible = "ti,pcm3168a"; reg = <0x44>;

• rst-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
  

  clocks = <&clk_core CLK_AUDIO>; clock-names = "scki"; VDD1-supply = <&supply3v3>;

-- Peter

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