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ASoC: da7213: Add support to handle mclk data provided to driver 

Driver now can make use of mclk data, if provided, to set, enable
and disable the clock source. As part of this, the choice to
enable clock squaring is dealt with as part of dai_sysclk() call
rather than as platform data.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Adam Thomson 2015-10-07 14:27:11 +01:00 committed by Mark Brown
parent e90996a3ea
commit 6e7c444318
3 changed files with 62 additions and 16 deletions
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3
include/sound/da7213.h
View File

@ -44,9 +44,6 @@ struct da7213_platform_data {
enum da7213_dmic_data_sel dmic_data_sel;
enum da7213_dmic_samplephase dmic_samplephase;
enum da7213_dmic_clk_rate dmic_clk_rate;
/* MCLK squaring config */
bool mclk_squaring;
};
#endif /* _DA7213_PDATA_H */

67
sound/soc/codecs/da7213.c
View File

@ -12,6 +12,7 @@
* option) any later version.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
@ -1222,23 +1223,44 @@ static int da7213_set_dai_sysclk(struct snd_soc_dai *codec_dai,
{
struct snd_soc_codec *codec = codec_dai->codec;
struct da7213_priv *da7213 = snd_soc_codec_get_drvdata(codec);
int ret = 0;
if ((da7213->clk_src == clk_id) && (da7213->mclk_rate == freq))
return 0;
if (((freq < 5000000) && (freq != 32768)) || (freq > 54000000)) {
dev_err(codec_dai->dev, "Unsupported MCLK value %d\n",
freq);
return -EINVAL;
}
switch (clk_id) {
case DA7213_CLKSRC_MCLK:
if ((freq == 32768) ||
((freq >= 5000000) && (freq <= 54000000))) {
da7213->mclk_rate = freq;
return 0;
} else {
dev_err(codec_dai->dev, "Unsupported MCLK value %d\n",
freq);
return -EINVAL;
}
da7213->mclk_squarer_en = false;
break;
case DA7213_CLKSRC_MCLK_SQR:
da7213->mclk_squarer_en = true;
break;
default:
dev_err(codec_dai->dev, "Unknown clock source %d\n", clk_id);
return -EINVAL;
}
da7213->clk_src = clk_id;
if (da7213->mclk) {
freq = clk_round_rate(da7213->mclk, freq);
ret = clk_set_rate(da7213->mclk, freq);
if (ret) {
dev_err(codec_dai->dev, "Failed to set clock rate %d\n",
freq);
return ret;
}
}
da7213->mclk_rate = freq;
return 0;
}
/* Supported PLL input frequencies are 5MHz - 54MHz. */
@ -1366,12 +1388,25 @@ static struct snd_soc_dai_driver da7213_dai = {
static int da7213_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct da7213_priv *da7213 = snd_soc_codec_get_drvdata(codec);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
/* MCLK */
if (da7213->mclk) {
ret = clk_prepare_enable(da7213->mclk);
if (ret) {
dev_err(codec->dev,
"Failed to enable mclk\n");
return ret;
}
}
/* Enable VMID reference & master bias */
snd_soc_update_bits(codec, DA7213_REFERENCES,
DA7213_VMID_EN | DA7213_BIAS_EN,
@ -1382,6 +1417,10 @@ static int da7213_set_bias_level(struct snd_soc_codec *codec,
/* Disable VMID reference & master bias */
snd_soc_update_bits(codec, DA7213_REFERENCES,
DA7213_VMID_EN | DA7213_BIAS_EN, 0);
/* MCLK */
if (da7213->mclk)
clk_disable_unprepare(da7213->mclk);
break;
}
return 0;
@ -1618,9 +1657,15 @@ static int da7213_probe(struct snd_soc_codec *codec)
DA7213_DMIC_DATA_SEL_MASK |
DA7213_DMIC_SAMPLEPHASE_MASK |
DA7213_DMIC_CLK_RATE_MASK, dmic_cfg);
}
/* Set MCLK squaring */
da7213->mclk_squarer_en = pdata->mclk_squaring;
/* Check if MCLK provided */
da7213->mclk = devm_clk_get(codec->dev, "mclk");
if (IS_ERR(da7213->mclk)) {
if (PTR_ERR(da7213->mclk) != -ENOENT)
return PTR_ERR(da7213->mclk);
else
da7213->mclk = NULL;
}
return 0;

8
sound/soc/codecs/da7213.h
View File

@ -13,6 +13,7 @@
#ifndef _DA7213_H
#define _DA7213_H
#include <linux/clk.h>
#include <linux/regmap.h>
#include <sound/da7213.h>
@ -504,14 +505,17 @@
#define DA7213_PLL_INDIV_20_40_MHZ_VAL 8
#define DA7213_PLL_INDIV_40_54_MHZ_VAL 16
enum clk_src {
DA7213_CLKSRC_MCLK
enum da7213_clk_src {
DA7213_CLKSRC_MCLK = 0,
DA7213_CLKSRC_MCLK_SQR,
};
/* Codec private data */
struct da7213_priv {
struct regmap *regmap;
struct clk *mclk;
unsigned int mclk_rate;
int clk_src;
bool master;
bool mclk_squarer_en;
bool srm_en;