Commit 6049af00 authored by Sugar Zhang's avatar Sugar Zhang Committed by Mark Brown
Browse files

ASoC: rt5640: add master clock handling for rt5640 



enable/disable master clock when codec is active or not.

Signed-off-by: default avatarSugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 92e963f5

Documentation/devicetree/bindings/sound/rt5640.txt

+3 −0
Original line number Diff line number Diff line
@@ -12,6 +12,9 @@ Required properties: 


Optional properties:



- clocks: The phandle of the master clock to the CODEC

- clock-names: Should be "mclk"



- realtek,in1-differential

- realtek,in2-differential

- realtek,in3-differential

sound/soc/codecs/rt5640.c

+31 −0
Original line number Diff line number Diff line
@@ -1949,7 +1949,33 @@ static int rt5640_set_dai_pll(struct snd_soc_dai *dai, int pll_id, int source, 
static int rt5640_set_bias_level(struct snd_soc_codec *codec,

			enum snd_soc_bias_level level)

{

	struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec);

	int ret;



	switch (level) {

	case SND_SOC_BIAS_ON:

		break;



	case SND_SOC_BIAS_PREPARE:

		/*

		 * SND_SOC_BIAS_PREPARE is called while preparing for a

		 * transition to ON or away from ON. If current bias_level

		 * is SND_SOC_BIAS_ON, then it is preparing for a transition

		 * away from ON. Disable the clock in that case, otherwise

		 * enable it.

		 */

		if (IS_ERR(rt5640->mclk))

			break;



		if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_ON) {

			clk_disable_unprepare(rt5640->mclk);

		} else {

			ret = clk_prepare_enable(rt5640->mclk);

			if (ret)

				return ret;

		}

		break;



	case SND_SOC_BIAS_STANDBY:

		if (SND_SOC_BIAS_OFF == snd_soc_codec_get_bias_level(codec)) {

			snd_soc_update_bits(codec, RT5640_PWR_ANLG1,
@@ -2088,6 +2114,11 @@ static int rt5640_probe(struct snd_soc_codec *codec) 
	struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);

	struct rt5640_priv *rt5640 = snd_soc_codec_get_drvdata(codec);



	/* Check if MCLK provided */

	rt5640->mclk = devm_clk_get(codec->dev, "mclk");

	if (PTR_ERR(rt5640->mclk) == -EPROBE_DEFER)

		return -EPROBE_DEFER;



	rt5640->codec = codec;



	snd_soc_codec_force_bias_level(codec, SND_SOC_BIAS_OFF);

sound/soc/codecs/rt5640.h

+2 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#ifndef _RT5640_H

#define _RT5640_H



#include <linux/clk.h>

#include <sound/rt5640.h>



/* Info */
@@ -2097,6 +2098,7 @@ struct rt5640_priv { 
	struct snd_soc_codec *codec;

	struct rt5640_platform_data pdata;

	struct regmap *regmap;

	struct clk *mclk;



	int sysclk;

	int sysclk_src;