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Subject[PATCH 5/5] ASoC: TWL4030: Do not modify the APLL_CTL register
Date
APLL_CTL register is configured by the twl4030-codec MFD
driver.
Remove code, which makes changes in the APLL_CTL register,
and replace those with checks against the configured
audio_mclk configuration done in the MFD driver.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
---
sound/soc/codecs/twl4030.c | 69 ++++++++++++++++---------------------------
1 files changed, 26 insertions(+), 43 deletions(-)
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index c0b47df..67cde72 100644
--- a/sound/soc/codecs/twl4030.c
+++ b/sound/soc/codecs/twl4030.c
@@ -214,7 +214,8 @@ static void twl4030_init_chip(struct snd_soc_codec *codec)

/* set all audio section registers to reasonable defaults */
for (i = TWL4030_REG_OPTION; i <= TWL4030_REG_MISC_SET_2; i++)
- twl4030_write(codec, i, cache[i]);
+ if (i != TWL4030_REG_APLL_CTL)
+ twl4030_write(codec, i, cache[i]);

}

@@ -1753,30 +1754,23 @@ static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai,
{
struct snd_soc_codec *codec = codec_dai->codec;
struct twl4030_priv *twl4030 = codec->private_data;
- u8 apll_ctrl;

- apll_ctrl = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL);
- apll_ctrl &= ~TWL4030_APLL_INFREQ;
switch (freq) {
case 19200000:
- apll_ctrl |= TWL4030_APLL_INFREQ_19200KHZ;
- twl4030->sysclk = 19200;
- break;
case 26000000:
- apll_ctrl |= TWL4030_APLL_INFREQ_26000KHZ;
- twl4030->sysclk = 26000;
- break;
case 38400000:
- apll_ctrl |= TWL4030_APLL_INFREQ_38400KHZ;
- twl4030->sysclk = 38400;
break;
default:
- printk(KERN_ERR "TWL4030 set sysclk: unknown rate %d\n",
- freq);
+ dev_err(codec->dev, "Unsupported frequency %u\n", freq);
return -EINVAL;
}

- twl4030_write(codec, TWL4030_REG_APLL_CTL, apll_ctrl);
+ if ((freq / 1000) != twl4030->sysclk) {
+ dev_err(codec->dev,
+ "Mismatch in APLL infrequency %u (configred: %u)\n",
+ freq, twl4030->sysclk * 1000);
+ return -EINVAL;
+ }

return 0;
}
@@ -1874,16 +1868,13 @@ static int twl4030_voice_startup(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
- u8 infreq;
+ struct twl4030_priv *twl4030 = codec->private_data;
u8 mode;

/* If the system master clock is not 26MHz, the voice PCM interface is
* not avilable.
*/
- infreq = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL)
- & TWL4030_APLL_INFREQ;
-
- if (infreq != TWL4030_APLL_INFREQ_26000KHZ) {
+ if (twl4030->sysclk != 26000) {
printk(KERN_ERR "TWL4030 voice startup: "
"MCLK is not 26MHz, call set_sysclk() on init\n");
return -EINVAL;
@@ -1958,22 +1949,18 @@ static int twl4030_voice_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
- u8 apll_ctrl;
+ struct twl4030_priv *twl4030 = codec->private_data;

- apll_ctrl = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL);
- apll_ctrl &= ~TWL4030_APLL_INFREQ;
- switch (freq) {
- case 26000000:
- apll_ctrl |= TWL4030_APLL_INFREQ_26000KHZ;
- break;
- default:
- printk(KERN_ERR "TWL4030 voice set sysclk: unknown rate %d\n",
- freq);
+ if (freq != 26000000) {
+ dev_err(codec->dev, "Unsupported frequency %u\n", freq);
+ return -EINVAL;
+ }
+ if ((freq / 1000) != twl4030->sysclk) {
+ dev_err(codec->dev,
+ "Mismatch in APLL infrequency %u (configred: %u)\n",
+ freq, twl4030->sysclk * 1000);
return -EINVAL;
}
-
- twl4030_write(codec, TWL4030_REG_APLL_CTL, apll_ctrl);
-
return 0;
}

@@ -2131,17 +2118,14 @@ static int twl4030_soc_probe(struct platform_device *pdev)
if (setup) {
unsigned char hs_pop;

- if (setup->sysclk)
- twl4030->sysclk = setup->sysclk;
- else
- twl4030->sysclk = 26000;
+ if (setup->sysclk != twl4030->sysclk)
+ dev_warn(&pdev->dev, "sysclk mismatch (%u vs %u)\n",
+ twl4030->sysclk, setup->sysclk);

hs_pop = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
hs_pop &= ~TWL4030_RAMP_DELAY;
hs_pop |= (setup->ramp_delay_value << 2);
twl4030_write_reg_cache(codec, TWL4030_REG_HS_POPN_SET, hs_pop);
- } else {
- twl4030->sysclk = 26000;
}

/* register pcms */
@@ -2191,10 +2175,8 @@ static int __devinit twl4030_codec_probe(struct platform_device *pdev)
struct twl4030_priv *twl4030;
int ret;

- if (!pdata || !(pdata->audio_mclk == 19200000 ||
- pdata->audio_mclk == 26000000 ||
- pdata->audio_mclk == 38400000)) {
- dev_err(&pdev->dev, "Invalid platform_data\n");
+ if (!pdata) {
+ dev_err(&pdev->dev, "platform_data is missing\n");
return -EINVAL;
}

@@ -2233,6 +2215,7 @@ static int __devinit twl4030_codec_probe(struct platform_device *pdev)
twl4030_codec = codec;

/* Set the defaults, and power up the codec */
+ twl4030->sysclk = twl4030_codec_get_mclk() / 1000;
twl4030_init_chip(codec);
codec->bias_level = SND_SOC_BIAS_OFF;
twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
--
1.6.5.2


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