From 448b06ba107d925d59d02781acdd2e4ad12dda0b Mon Sep 17 00:00:00 2001
From: Benjamin Bara <benjamin.bara@skidata.com>
Date: Fri, 3 Mar 2023 11:04:03 +0100
Subject: [PATCH] ASoC: maxim,max9867: add "mclk" support
Add basic support for the codecs' mclk.
Enable it on SND_SOC_BIAS_ON, disable it on SND_SOC_BIAS_OFF.
Signed-off-by: Benjamin Bara <benjamin.bara@skidata.com>
Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Link: https://lore.kernel.org/r/20230302-max9867-v2-3-fd2036d5e825@skidata.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
sound/soc/codecs/max9867.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c
index e161ab037bf7c..ae552d72beecb 100644
--- a/sound/soc/codecs/max9867.c
+++ b/sound/soc/codecs/max9867.c
@@ -6,6 +6,7 @@
// Copyright 2018 Ladislav Michl <ladis@linux-mips.org>
//
+#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
@@ -16,6 +17,7 @@
#include "max9867.h"
struct max9867_priv {
+ struct clk *mclk;
struct regmap *regmap;
const struct snd_pcm_hw_constraint_list *constraints;
unsigned int sysclk, pclk;
@@ -577,6 +579,11 @@ static int max9867_set_bias_level(struct snd_soc_component *component,
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
switch (level) {
+ case SND_SOC_BIAS_ON:
+ err = clk_prepare_enable(max9867->mclk);
+ if (err)
+ return err;
+ break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
err = regcache_sync(max9867->regmap);
@@ -595,6 +602,7 @@ static int max9867_set_bias_level(struct snd_soc_component *component,
return err;
regcache_mark_dirty(max9867->regmap);
+ clk_disable_unprepare(max9867->mclk);
break;
default:
break;
@@ -663,9 +671,16 @@ static int max9867_i2c_probe(struct i2c_client *i2c)
dev_info(&i2c->dev, "device revision: %x\n", reg);
ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
max9867_dai, ARRAY_SIZE(max9867_dai));
- if (ret < 0)
+ if (ret < 0) {
dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
- return ret;
+ return ret;
+ }
+
+ max9867->mclk = devm_clk_get(&i2c->dev, NULL);
+ if (IS_ERR(max9867->mclk))
+ return PTR_ERR(max9867->mclk);
+
+ return 0;
}
static const struct i2c_device_id max9867_i2c_id[] = {
--
2.30.2