From: Alejandro <atafalla@dnyon.com>
To: Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Alejandro Tafalla <atafalla@dnyon.com>,
Rob Herring <robh+dt@kernel.org>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
alsa-devel@alsa-project.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 1/2] ASoC: max98927: Handle reset gpio when probing i2c
Date: Fri, 3 Sep 2021 03:49:50 +0200 [thread overview]
Message-ID: <04a18f4115539752429da55fb857834cea0944e5.1630632805.git.atafalla@dnyon.com> (raw)
In-Reply-To: <cover.1630632805.git.atafalla@dnyon.com>
From: Alejandro Tafalla <atafalla@dnyon.com>
Drive the reset gpio if defined in the DTS node.
Signed-off-by: Alejandro Tafalla <atafalla@dnyon.com>
---
sound/soc/codecs/max98927.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c
index 8b206ee77709..daf06b503433 100644
--- a/sound/soc/codecs/max98927.c
+++ b/sound/soc/codecs/max98927.c
@@ -868,6 +868,7 @@ static int max98927_i2c_probe(struct i2c_client *i2c,
int ret = 0, value;
int reg = 0;
struct max98927_priv *max98927 = NULL;
+ struct gpio_desc *reset_gpio;
max98927 = devm_kzalloc(&i2c->dev,
sizeof(*max98927), GFP_KERNEL);
@@ -898,6 +899,19 @@ static int max98927_i2c_probe(struct i2c_client *i2c,
return ret;
}
+ reset_gpio
+ = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(reset_gpio)) {
+ ret = PTR_ERR(reset_gpio);
+ return dev_err_probe(&i2c->dev, ret, "failed to request GPIO reset pin");
+ }
+
+ if (reset_gpio) {
+ usleep_range(8000, 10000);
+ gpiod_set_value_cansleep(reset_gpio, 1);
+ usleep_range(1000, 5000);
+ }
+
/* Check Revision ID */
ret = regmap_read(max98927->regmap,
MAX98927_R01FF_REV_ID, ®);
--
2.33.0
next prev parent reply other threads:[~2021-09-03 1:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-03 1:49 [PATCH v3 0/2] Add reset-gpios handling for max98927 Alejandro
2021-09-03 1:49 ` Alejandro [this message]
2021-09-03 8:18 ` [PATCH v3 1/2] ASoC: max98927: Handle reset gpio when probing i2c Andy Shevchenko
2021-09-03 15:52 ` Alejandro Tafalla
2021-09-03 9:20 ` Péter Ujfalusi
2021-09-03 23:22 ` Alejandro Tafalla
2021-09-03 1:49 ` [PATCH v3 2/2] dt-bindings: sound: max98927: Add reset-gpios optional property Alejandro
2021-09-03 17:41 ` Rob Herring
2021-09-03 17:58 ` Alejandro Tafalla
2021-09-03 8:16 ` [PATCH v3 0/2] Add reset-gpios handling for max98927 Andy Shevchenko
2021-09-03 16:02 ` Alejandro Tafalla
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