From: Martin Povišer <povik+lin@cutebit.org>
Date: Thu, 30 Jun 2022 07:51:32 +0000 (+0200)
Subject: ASoC: tas2764: Add post reset delays
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7dc0ae04c04ef2562188d83c32a2c5c231751d33;p=linux.git

ASoC: tas2764: Add post reset delays

[ Upstream commit cd10bb89b0d57bca98eb75e0444854a1c129a14e ]

Make sure there is at least 1 ms delay from reset to first command as
is specified in the datasheet. This is a fix similar to commit
307f31452078 ("ASoC: tas2770: Insert post reset delay").

Fixes: 827ed8a0fa50 ("ASoC: tas2764: Add the driver for the TAS2764")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220630075135.2221-1-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index 9265af41c235d..edc66ff6dc49f 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -42,10 +42,12 @@ static void tas2764_reset(struct tas2764_priv *tas2764)
 		gpiod_set_value_cansleep(tas2764->reset_gpio, 0);
 		msleep(20);
 		gpiod_set_value_cansleep(tas2764->reset_gpio, 1);
+		usleep_range(1000, 2000);
 	}
 
 	snd_soc_component_write(tas2764->component, TAS2764_SW_RST,
 				TAS2764_RST);
+	usleep_range(1000, 2000);
 }
 
 static int tas2764_set_bias_level(struct snd_soc_component *component,
@@ -107,8 +109,10 @@ static int tas2764_codec_resume(struct snd_soc_component *component)
 	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
 	int ret;
 
-	if (tas2764->sdz_gpio)
+	if (tas2764->sdz_gpio) {
 		gpiod_set_value_cansleep(tas2764->sdz_gpio, 1);
+		usleep_range(1000, 2000);
+	}
 
 	ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
 					    TAS2764_PWR_CTRL_MASK,
@@ -501,8 +505,10 @@ static int tas2764_codec_probe(struct snd_soc_component *component)
 
 	tas2764->component = component;
 
-	if (tas2764->sdz_gpio)
+	if (tas2764->sdz_gpio) {
 		gpiod_set_value_cansleep(tas2764->sdz_gpio, 1);
+		usleep_range(1000, 2000);
+	}
 
 	tas2764_reset(tas2764);