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MFD: twl4030-codec: APLL_INFREQ handling in the MFD driver

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Configure the APLL_INFREQ field in the APLL_CTL register
based on the platform data.
Provide also a function for childs to query the audio_mclk
frequency.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Peter Ujfalusi 2009-11-04 09:58:19 +02:00 committed by Tony Lindgren
parent 6df74efbb8
commit cfaf6d2c1c
2 changed files with 36 additions and 0 deletions
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35
drivers/mfd/twl4030-codec.c
View file

@ -41,6 +41,7 @@ struct twl4030_codec_resource {
};
struct twl4030_codec {
unsigned int audio_mclk;
struct mutex mutex;
struct twl4030_codec_resource resource[TWL4030_CODEC_RES_MAX];
struct mfd_cell cells[TWL4030_CODEC_CELLS];
@ -145,12 +146,45 @@ int twl4030_codec_disable_resource(unsigned id)
}
EXPORT_SYMBOL_GPL(twl4030_codec_disable_resource);
unsigned int twl4030_codec_get_mclk(void)
{
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
return codec->audio_mclk;
}
EXPORT_SYMBOL_GPL(twl4030_codec_get_mclk);
static int __devinit twl4030_codec_probe(struct platform_device *pdev)
{
struct twl4030_codec *codec;
struct twl4030_codec_data *pdata = pdev->dev.platform_data;
struct mfd_cell *cell = NULL;
int ret, childs = 0;
u8 val;
if (!pdata) {
dev_err(&pdev->dev, "Platform data is missing\n");
return -EINVAL;
}
/* Configure APLL_INFREQ and disable APLL if enabled */
val = 0;
switch (pdata->audio_mclk) {
case 19200000:
val |= TWL4030_APLL_INFREQ_19200KHZ;
break;
case 26000000:
val |= TWL4030_APLL_INFREQ_26000KHZ;
break;
case 38400000:
val |= TWL4030_APLL_INFREQ_38400KHZ;
break;
default:
dev_err(&pdev->dev, "Invalid audio_mclk\n");
return -EINVAL;
}
twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
val, TWL4030_REG_APLL_CTL);
codec = kzalloc(sizeof(struct twl4030_codec), GFP_KERNEL);
if (!codec)
@ -160,6 +194,7 @@ static int __devinit twl4030_codec_probe(struct platform_device *pdev)
twl4030_codec_dev = pdev;
mutex_init(&codec->mutex);
codec->audio_mclk = pdata->audio_mclk;
/* Codec power */
codec->resource[TWL4030_CODEC_RES_POWER].reg = TWL4030_REG_CODEC_MODE;

1
include/linux/mfd/twl4030-codec.h
View file

@ -267,5 +267,6 @@ enum twl4030_codec_res {
int twl4030_codec_disable_resource(enum twl4030_codec_res id);
int twl4030_codec_enable_resource(enum twl4030_codec_res id);
unsigned int twl4030_codec_get_mclk(void);
#endif /* End of __TWL4030_CODEC_H__ */