linux-kernel - [PATCH 08/16] ASoC: cs42l42: Reset and power-down on driver remove()

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Message-ID: <20211015133619.4698-9-rf@opensource.cirrus.com>
Date:   Fri, 15 Oct 2021 14:36:11 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH 08/16] ASoC: cs42l42: Reset and power-down on driver remove()

Driver remove() should assert RESET and disable the supplies.
Previously this assumed that calling pm_runtime_suspend() would result
in a call to cs42l42_runtime_suspend() to power-down. This isn't
guaranteed - pm_runtime can be disabled.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
Fixes: 2b869e0ea598 ("ASoC: cs42l42: Remove power if the driver is being removed")
---
 sound/soc/codecs/cs42l42.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 420e16563c45..cf1f68474d21 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -2131,6 +2131,9 @@ static int cs42l42_i2c_remove(struct i2c_client *i2c_client)
 	pm_runtime_suspend(&i2c_client->dev);
 	pm_runtime_disable(&i2c_client->dev);
 
+	gpiod_set_value_cansleep(cs42l42->reset_gpio, 0);
+	regulator_bulk_disable(ARRAY_SIZE(cs42l42->supplies), cs42l42->supplies);
+
 	return 0;
 }
 
-- 
2.11.0