c4f7f8ca4822a6776e838f522eacd597ac5f117a0fdf9c6c09ca4710.patch

From 42f8374197668b7c55bc0cb903147962555a1388 Mon Sep 17 00:00:00 2001
From: Akshu Agrawal <akshu.agrawal@amd.com>
Date: Mon, 6 Jul 2020 19:28:01 +0530
Subject: [PATCH] FROMLIST: ASoC: rt5682: Add fmw property to get name of mclk

Non-dts based systems can use ACPI DSDT to pass on the mclk.
Thus add fmw property mclk-name to get the name of the system clk
and link it to rt5682 mclk.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>

(am from https://patchwork.kernel.org/patch/11648137/)

BUG=b:158906189
TEST=rt5682 driver get the correct clk and tested audio playback

Change-Id: I547a5d438c3d22f16e51d193554182722cecbe63
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2282500
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
---
 include/sound/rt5682.h        | 1 +
 sound/soc/codecs/rt5682-i2c.c | 5 ++++-
 sound/soc/codecs/rt5682.c     | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/sound/rt5682.h b/include/sound/rt5682.h
--- a/include/sound/rt5682.h
+++ b/include/sound/rt5682.h
@@ -43,6 +43,7 @@ struct rt5682_platform_data {
 	bool dmic_clk_driving_high;
 
 	const char *dai_clk_names[RT5682_DAI_NUM_CLKS];
+	const char *mclk_name;
 };
 
 #endif
diff --git a/sound/soc/codecs/rt5682-i2c.c b/sound/soc/codecs/rt5682-i2c.c
--- a/sound/soc/codecs/rt5682-i2c.c
+++ b/sound/soc/codecs/rt5682-i2c.c
@@ -280,7 +280,10 @@ static int rt5682_i2c_probe(struct i2c_client *i2c,
 
 #ifdef CONFIG_COMMON_CLK
 	/* Check if MCLK provided */
-	rt5682->mclk = devm_clk_get_optional(&i2c->dev, "mclk");
+	if (rt5682->pdata.mclk_name)
+		rt5682->mclk = clk_get(NULL, rt5682->pdata.mclk_name);
+	if (!rt5682->mclk)
+		rt5682->mclk = devm_clk_get_optional(&i2c->dev, "mclk");
 	if (IS_ERR(rt5682->mclk))
 		return PTR_ERR(rt5682->mclk);
 
diff --git a/sound/soc/codecs/rt5682.c b/sound/soc/codecs/rt5682.c
--- a/sound/soc/codecs/rt5682.c
+++ b/sound/soc/codecs/rt5682.c
@@ -3073,6 +3073,7 @@ int rt5682_parse_dt(struct rt5682_priv *rt5682, struct device *dev)
 
 	rt5682->pdata.dmic_clk_driving_high = device_property_read_bool(dev,
 		"realtek,dmic-clk-driving-high");
+	device_property_read_string(dev, "realtek,mclk-name", &rt5682->pdata.mclk_name);
 
 	return 0;
 }
-- 
2.34.0.rc2.393.gf8c9666880-goog