Move the APLL_CTL register configuration to the twl4030-codec MFD driver. Provide also a function for childs to query the audio_mclk frequency.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com --- drivers/mfd/twl4030-codec.c | 40 +++++++++++++++++++++++++++++++++++++ include/linux/mfd/twl4030-codec.h | 1 + 2 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/twl4030-codec.c b/drivers/mfd/twl4030-codec.c index 9710307..6e77f57 100644 --- a/drivers/mfd/twl4030-codec.c +++ b/drivers/mfd/twl4030-codec.c @@ -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 +146,32 @@ 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; + } + if (!(pdata->audio_mclk == 19200000 || + pdata->audio_mclk == 26000000 || + pdata->audio_mclk == 38400000)) { + dev_err(&pdev->dev, "Invalid audio_mclk\n"); + return -EINVAL; + }
codec = kzalloc(sizeof(struct twl4030_codec), GFP_KERNEL); if (!codec) @@ -160,6 +181,25 @@ static int __devinit twl4030_codec_probe(struct platform_device *pdev)
twl4030_codec_dev = pdev; mutex_init(&codec->mutex); + codec->audio_mclk = pdata->audio_mclk; + + /* Configure APLL_INFREQ */ + twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val, + TWL4030_REG_APLL_CTL); + val &= ~TWL4030_APLL_INFREQ; + switch (codec->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; + } + twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, + val, TWL4030_REG_APLL_CTL);
/* Codec power */ codec->resource[TWL4030_CODEC_RES_POWER].reg = TWL4030_REG_CODEC_MODE; diff --git a/include/linux/mfd/twl4030-codec.h b/include/linux/mfd/twl4030-codec.h index ef0a304..2ec317c 100644 --- a/include/linux/mfd/twl4030-codec.h +++ b/include/linux/mfd/twl4030-codec.h @@ -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__ */