@@ -25,6 +25,7 @@
#include <linux/spi/spi.h>
#include <linux/of_device.h>
#include <linux/mutex.h>
+#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -45,6 +46,7 @@ static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
/* codec private data */
struct wm8731_priv {
struct regmap *regmap;
+ struct clk *mclk;
struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
const struct snd_pcm_hw_constraint_list *constraints;
unsigned int sysclk;
@@ -390,6 +392,8 @@ static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
switch (clk_id) {
case WM8731_SYSCLK_XTAL:
case WM8731_SYSCLK_MCLK:
+ if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
+ return -EINVAL;
wm8731->sysclk_type = clk_id;
break;
default:
@@ -491,6 +495,8 @@ static int wm8731_set_bias_level(struct snd_soc_codec *codec,
switch (level) {
case SND_SOC_BIAS_ON:
+ if (wm8731->mclk)
+ clk_prepare_enable(wm8731->mclk);
break;
case SND_SOC_BIAS_PREPARE:
break;
@@ -509,6 +515,8 @@ static int wm8731_set_bias_level(struct snd_soc_codec *codec,
snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
break;
case SND_SOC_BIAS_OFF:
+ if (wm8731->mclk)
+ clk_disable_unprepare(wm8731->mclk);
snd_soc_write(codec, WM8731_PWR, 0xffff);
regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
wm8731->supplies);
@@ -667,6 +675,19 @@ static int wm8731_spi_probe(struct spi_device *spi)
if (wm8731 == NULL)
return -ENOMEM;
+ wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
+ if (IS_ERR(wm8731->mclk)) {
+ ret = PTR_ERR(wm8731->mclk);
+ if (ret == -ENOENT) {
+ wm8731->mclk = NULL;
+ dev_warn(&spi->dev, "Assuming static MCLK\n");
+ } else {
+ dev_err(&spi->dev, "Failed to get MCLK: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
mutex_init(&wm8731->lock);
wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
@@ -718,6 +739,19 @@ static int wm8731_i2c_probe(struct i2c_client *i2c,
if (wm8731 == NULL)
return -ENOMEM;
+ wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
+ if (IS_ERR(wm8731->mclk)) {
+ ret = PTR_ERR(wm8731->mclk);
+ if (ret == -ENOENT) {
+ wm8731->mclk = NULL;
+ dev_warn(&i2c->dev, "Assuming static MCLK\n");
+ } else {
+ dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
mutex_init(&wm8731->lock);
wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
Enable WM8731 to support common clock framework. Signed-off-by: Songjun Wu <songjun.wu@atmel.com> --- sound/soc/codecs/wm8731.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)