linux-kernel - [PATCH 6.4, 6.5] ASoC: cs35l56: Disable low-power hibernation mode

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Date:   Mon, 25 Sep 2023 16:14:43 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <stable@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>,
        <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 6.4, 6.5] ASoC: cs35l56: Disable low-power hibernation mode

commit 18789be8e0d9fbb78b2290dcf93f500726ed19f0 upstream.
Please apply to 6.4 and 6.5.

Do not allow the CS35L56 to be put into its lowest power
"hibernation" mode. This only affects I2C because "hibernation"
is already disabled on SPI and SoundWire.

Recent firmwares need a different wake-up sequence. Until
that sequence has been specified, the chip "hibernation" mode
must be disabled otherwise it can intermittently fail to wake.

Backport note: This is the same change as upstream commit, to delete
one line, but the upstream commit would not apply cleanly on older
branches because of minor differences to the surrounding code.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
Link: https://lore.kernel.org/r/20230912133841.3480466-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 sound/soc/codecs/cs35l56-i2c.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/sound/soc/codecs/cs35l56-i2c.c b/sound/soc/codecs/cs35l56-i2c.c
index c613a2554fa3..494adabd4f43 100644
--- a/sound/soc/codecs/cs35l56-i2c.c
+++ b/sound/soc/codecs/cs35l56-i2c.c
@@ -27,7 +27,6 @@ static int cs35l56_i2c_probe(struct i2c_client *client)
 		return -ENOMEM;

 	cs35l56->dev = dev;
-	cs35l56->can_hibernate = true;

 	i2c_set_clientdata(client, cs35l56);
 	cs35l56->regmap = devm_regmap_init_i2c(client, regmap_config);
-- 
2.30.2