[PATCH 1/2] bindings: sound: pcm3168a: Document optional RST gpio

From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: <broonie@kernel.org>, <lgirdwood@gmail.com>
Cc: <alsa-devel@alsa-project.org>, <kuninori.morimoto.gx@renesas.com>,
	<linus.walleij@linaro.org>, <robh+dt@kernel.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/2] bindings: sound: pcm3168a: Document optional RST gpio
Date: Wed, 13 Nov 2019 14:47:33 +0200	[thread overview]
Message-ID: <20191113124734.27984-2-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <20191113124734.27984-1-peter.ujfalusi@ti.com>

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
+
 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

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

