MFD: twl4030-codec: APLL_INFREQ handling in the MFD driver
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>
diff --git a/drivers/mfd/twl4030-codec.c b/drivers/mfd/twl4030-codec.c
index 9710307..77b9149 100644
--- a/drivers/mfd/twl4030-codec.c
+++ b/drivers/mfd/twl4030-codec.c
@@ -41,6 +41,7 @@
};
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 @@
}
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 @@
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;