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ASoC: simple-amplifier: Make gpio property optional 

Some amplifier may not have a GPIO to control the power, but instead simply
rely on the regulator to power up and down the amplifier.

In order to support those setups, let's make the GPIO optional.

Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mylène Josserand 2019-03-18 11:39:38 +01:00 committed by Mark Brown
parent c4bce31c49
commit 2944d29d7c
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 3 additions and 2 deletions
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2
Documentation/devicetree/bindings/sound/simple-amplifier.txt
View File

@ -2,9 +2,9 @@ Simple Amplifier Audio Driver
Required properties:
- compatible : "dioo,dio2125" or "simple-audio-amplifier"
- enable-gpios : the gpio connected to the enable pin of the simple amplifier
Optional properties:
- enable-gpios : the gpio connected to the enable pin of the simple amplifier
- VCC-supply : power supply for the device, as covered
in Documentation/devicetree/bindings/regulator/regulator.txt

3
sound/soc/codecs/simple-amplifier.c
View File

@ -89,7 +89,8 @@ static int simple_amp_probe(struct platform_device *pdev)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
priv->gpiod_enable = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
priv->gpiod_enable = devm_gpiod_get_optional(dev, "enable",
GPIOD_OUT_LOW);
if (IS_ERR(priv->gpiod_enable)) {
err = PTR_ERR(priv->gpiod_enable);
if (err != -EPROBE_DEFER)