[alsa-devel] [PATCH] ALSA: ASoc: Add regulator support to CS4270 codec driver

[Daniel Mack]

Was that one applied?

On Mon, Nov 30, 2009 at 05:56:11PM +0100, Daniel Mack wrote:
> Signed-off-by: Daniel Mack <daniel at caiaq.de>
> Cc: Mark Brown <broonie at opensource.wolfsonmicro.com>
> Cc: Timur Tabi <timur at freescale.com>
> Cc: Liam Girdwood <lrg at slimlogic.co.uk>
> ---
>  sound/soc/codecs/cs4270.c |   43 ++++++++++++++++++++++++++++++++++++++++---
>  1 files changed, 40 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c
> index ffe122d..8b54575 100644
> --- a/sound/soc/codecs/cs4270.c
> +++ b/sound/soc/codecs/cs4270.c
> @@ -28,6 +28,7 @@
>  #include <sound/initval.h>
>  #include <linux/i2c.h>
>  #include <linux/delay.h>
> +#include <linux/regulator/consumer.h>
>  
>  #include "cs4270.h"
>  
> @@ -106,6 +107,10 @@
>  #define CS4270_MUTE_DAC_A	0x01
>  #define CS4270_MUTE_DAC_B	0x02
>  
> +static const char *supply_names[] = {
> +	"va", "vd", "vlc"
> +};
> +
>  /* Private data for the CS4270 */
>  struct cs4270_private {
>  	struct snd_soc_codec codec;
> @@ -114,6 +119,9 @@ struct cs4270_private {
>  	unsigned int mode; /* The mode (I2S or left-justified) */
>  	unsigned int slave_mode;
>  	unsigned int manual_mute;
> +
> +	/* power domain regulators */
> +	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
>  };
>  
>  /**
> @@ -579,7 +587,8 @@ static int cs4270_probe(struct platform_device *pdev)
>  {
>  	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
>  	struct snd_soc_codec *codec = cs4270_codec;
> -	int ret;
> +	struct cs4270_private *cs4270 = codec->private_data;
> +	int i, ret;
>  
>  	/* Connect the codec to the socdev.  snd_soc_new_pcms() needs this. */
>  	socdev->card->codec = codec;
> @@ -599,6 +608,15 @@ static int cs4270_probe(struct platform_device *pdev)
>  		goto error_free_pcms;
>  	}
>  
> +	/* get the power supply regulators */
> +	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
> +		cs4270->supplies[i].supply = supply_names[i];
> +
> +	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(cs4270->supplies),
> +				 cs4270->supplies);
> +	if (ret < 0)
> +		goto error_free_pcms;
> +
>  	return 0;
>  
>  error_free_pcms:
> @@ -616,8 +634,11 @@ error_free_pcms:
>  static int cs4270_remove(struct platform_device *pdev)
>  {
>  	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
> +	struct snd_soc_codec *codec = cs4270_codec;
> +	struct cs4270_private *cs4270 = codec->private_data;
>  
>  	snd_soc_free_pcms(socdev);
> +	regulator_bulk_free(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);
>  
>  	return 0;
>  };
> @@ -799,17 +820,33 @@ MODULE_DEVICE_TABLE(i2c, cs4270_id);
>  static int cs4270_soc_suspend(struct platform_device *pdev, pm_message_t mesg)
>  {
>  	struct snd_soc_codec *codec = cs4270_codec;
> -	int reg = snd_soc_read(codec, CS4270_PWRCTL) | CS4270_PWRCTL_PDN_ALL;
> +	struct cs4270_private *cs4270 = codec->private_data;
> +	int reg, ret;
>  
> -	return snd_soc_write(codec, CS4270_PWRCTL, reg);
> +	reg = snd_soc_read(codec, CS4270_PWRCTL) | CS4270_PWRCTL_PDN_ALL;
> +	if (reg < 0)
> +		return reg;
> +
> +	ret = snd_soc_write(codec, CS4270_PWRCTL, reg);
> +	if (ret < 0)
> +		return ret;
> +
> +	regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies),
> +			       cs4270->supplies);
> +
> +	return 0;
>  }
>  
>  static int cs4270_soc_resume(struct platform_device *pdev)
>  {
>  	struct snd_soc_codec *codec = cs4270_codec;
> +	struct cs4270_private *cs4270 = codec->private_data;
>  	struct i2c_client *i2c_client = codec->control_data;
>  	int reg;
>  
> +	regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
> +			      cs4270->supplies);
> +
>  	/* In case the device was put to hard reset during sleep, we need to
>  	 * wait 500ns here before any I2C communication. */
>  	ndelay(500);
> -- 
> 1.6.5.2
>