[alsa-devel] [PATCH 2/2] ASoC: wm8782: add support for regulators

[Mark Brown]

On Wed, Oct 03, 2018 at 09:34:36PM +0200, Daniel Mack wrote:
> Lookup regulators for Vdd and Vdda during probe, and enable them when the

Copying in the Cirrus people...

As documented in SubmittingPatches please send patches to the 
maintainers for the code you would like to change.  The normal kernel
workflow is that people apply patches from their inboxes, if they aren't
copied they are likely to not see the patch at all and it is much more
difficult to apply patches.

> component is linked.
> 
> Signed-off-by: Daniel Mack <daniel at zonque.org>
> ---
>  sound/soc/codecs/wm8782.c | 63 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/sound/soc/codecs/wm8782.c b/sound/soc/codecs/wm8782.c
> index 317db9a149a7..cf2cdbece122 100644
> --- a/sound/soc/codecs/wm8782.c
> +++ b/sound/soc/codecs/wm8782.c
> @@ -20,6 +20,7 @@
>  #include <linux/module.h>
>  #include <linux/kernel.h>
>  #include <linux/device.h>
> +#include <linux/regulator/consumer.h>
>  #include <sound/core.h>
>  #include <sound/pcm.h>
>  #include <sound/ac97_codec.h>
> @@ -50,7 +51,51 @@ static struct snd_soc_dai_driver wm8782_dai = {
>  	},
>  };
>  
> +/* regulator power supply names */
> +static const char *supply_names[] = {
> +	"Vdda", /* analog supply, 2.7V - 3.6V */
> +	"Vdd",  /* digital supply, 2.7V - 5.5V */
> +};
> +
> +struct wm8782_priv {
> +	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
> +};
> +
> +static int wm8782_soc_probe(struct snd_soc_component *component)
> +{
> +	struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
> +	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
> +}
> +
> +static void wm8782_soc_remove(struct snd_soc_component *component)
> +{
> +	struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
> +	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
> +}
> +
> +#ifdef CONFIG_PM
> +static int wm8782_soc_suspend(struct snd_soc_component *component)
> +{
> +	struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
> +	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
> +	return 0;
> +}
> +
> +static int wm8782_soc_resume(struct snd_soc_component *component)
> +{
> +	struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
> +	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
> +}
> +#else
> +#define wm8782_soc_suspend      NULL
> +#define wm8782_soc_resume       NULL
> +#endif /* CONFIG_PM */
> +
>  static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
> +	.probe			= wm8782_soc_probe,
> +	.remove			= wm8782_soc_remove,
> +	.suspend		= wm8782_soc_suspend,
> +	.resume			= wm8782_soc_resume,
>  	.dapm_widgets		= wm8782_dapm_widgets,
>  	.num_dapm_widgets	= ARRAY_SIZE(wm8782_dapm_widgets),
>  	.dapm_routes		= wm8782_dapm_routes,
> @@ -63,6 +108,24 @@ static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
>  
>  static int wm8782_probe(struct platform_device *pdev)
>  {
> +	struct device *dev = &pdev->dev;
> +	struct wm8782_priv *priv;
> +	int ret, i;
> +
> +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	dev_set_drvdata(dev, priv);
> +
> +	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
> +		priv->supplies[i].supply = supply_names[i];
> +
> +	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
> +				      priv->supplies);
> +	if (ret < 0)
> +		return ret;
> +
>  	return devm_snd_soc_register_component(&pdev->dev,
>  			&soc_component_dev_wm8782, &wm8782_dai, 1);
>  }
> -- 
> 2.17.1
> 
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