linux-kernel - [PATCH 06/16] ASoC: cs42l42: Reset GPIO is mandatory

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Date:   Fri, 15 Oct 2021 14:36:09 +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 06/16] ASoC: cs42l42: Reset GPIO is mandatory

The hard RESET must be used to correctly power-up the cs42l42, as
described in the datasheet.

The code was getting the GPIO with devm_gpiod_get_optional(). Change
this to devm_gpiod_get().

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 sound/soc/codecs/cs42l42.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 0ecf2129ea45..629a0783e693 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -2034,17 +2034,14 @@ static int cs42l42_i2c_probe(struct i2c_client *i2c_client,
 	}
 
 	/* Reset the Device */
-	cs42l42->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
-		"reset", GPIOD_OUT_LOW);
+	cs42l42->reset_gpio = devm_gpiod_get(&i2c_client->dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(cs42l42->reset_gpio)) {
 		ret = PTR_ERR(cs42l42->reset_gpio);
+		dev_err(&i2c_client->dev, "Failed to request reset gpio: %d\n", ret);
 		goto err_disable;
 	}
 
-	if (cs42l42->reset_gpio) {
-		dev_dbg(&i2c_client->dev, "Found reset GPIO\n");
-		gpiod_set_value_cansleep(cs42l42->reset_gpio, 1);
-	}
+	gpiod_set_value_cansleep(cs42l42->reset_gpio, 1);
 	usleep_range(CS42L42_BOOT_TIME_US, CS42L42_BOOT_TIME_US * 2);
 
 	/* Request IRQ */
-- 
2.11.0