If master clock is provided through device tree, then update
the master clock frequency during set_sysclk.
Documentation has been updated to reflect the change.
Signed-off-by: Tushar Behera <tushar.behera@xxxxxxxxxx>
---
.../devicetree/bindings/sound/max98095.txt | 6 ++++++
sound/soc/codecs/max98095.c | 14 ++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/max98095.txt b/Documentation/devicetree/bindings/sound/max98095.txt
index bacbeaa..318a4c8 100644
--- a/Documentation/devicetree/bindings/sound/max98095.txt
+++ b/Documentation/devicetree/bindings/sound/max98095.txt
@@ -8,6 +8,12 @@ Required properties:
- reg : The I2C address of the device.
+Optional properties:
+
+- clocks: The phandle of the master clock to the CODEC
+
+- clock-names: Should be "mclk"
+
Example:
max98095: codec@11 {
diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c
index d6c1e4c..4d66b95 100644
--- a/sound/soc/codecs/max98095.c
+++ b/sound/soc/codecs/max98095.c
@@ -15,6 +15,7 @@
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
+#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -42,6 +43,7 @@ struct max98095_priv {
struct regmap *regmap;
enum max98095_type devtype;
struct max98095_pdata *pdata;
+ struct clk *mclk;
unsigned int sysclk;
struct max98095_cdata dai[3];
const char **eq_texts;
@@ -1395,6 +1397,11 @@ static int max98095_dai_set_sysclk(struct snd_soc_dai *dai,
if (freq == max98095->sysclk)
return 0;
+ if (!IS_ERR(max98095->mclk)) {
+ freq = clk_round_rate(max98095->mclk, freq);
+ clk_set_rate(max98095->mclk, freq);
+ }
+
/* Setup clocks for slave mode, and using the PLL
* PSCLK = 0x01 (when master clk is 10MHz to 20MHz)
* 0x02 (when master clk is 20MHz to 40MHz)..
@@ -2238,6 +2245,10 @@ static int max98095_probe(struct snd_soc_codec *codec)
struct i2c_client *client;
int ret = 0;
+ max98095->mclk = devm_clk_get(codec->dev, "mclk");
+ if (!IS_ERR(max98095->mclk))
+ clk_prepare_enable(max98095->mclk);
+
/* reset the codec, the DSP core, and disable all interrupts */
max98095_reset(codec);
@@ -2340,6 +2351,9 @@ static int max98095_remove(struct snd_soc_codec *codec)
if (max98095->headphone_jack || max98095->mic_jack)
max98095_jack_detect_disable(codec);
+ if (!IS_ERR(max98095->mclk))
+ clk_disable_unprepare(max98095->mclk);
+
if (client->irq)
free_irq(client->irq, codec);
--
1.7.9.5
--
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