From e395b1261a7ada3b1eb890e49e25f4517d718f56 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Povi=C5=A1er?= <povik+lin@protonmail.com>
Date: Fri, 28 Jan 2022 20:20:16 +0100
Subject: [PATCH] ASoC: tas2770: Insert post reset delay
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Per TAS2770 datasheet there must be a 1 ms delay from reset to first
command. So insert delays into the driver where appropriate.
Fixes: 1a476abc723e ("tas2770: add tas2770 smart PA kernel driver")
Signed-off-by: Martin PoviĊĦer <povik+lin@protonmail.com>
---
sound/soc/codecs/tas2770.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c
index b52c0861edc8..e11d04e31a67 100644
--- a/sound/soc/codecs/tas2770.c
+++ b/sound/soc/codecs/tas2770.c
@@ -38,10 +38,12 @@ static void tas2770_reset(struct tas2770_priv *tas2770)
gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
msleep(20);
gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
+ msleep(1);
}
snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
TAS2770_RST);
+ msleep(1);
}
static int tas2770_set_bias_level(struct snd_soc_component *component,
@@ -110,6 +112,7 @@ static int tas2770_codec_resume(struct snd_soc_component *component)
if (tas2770->sdz_gpio) {
gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
+ msleep(1);
} else {
ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
TAS2770_PWR_CTRL_MASK,
@@ -529,8 +532,10 @@ static int tas2770_codec_probe(struct snd_soc_component *component)
tas2770->component = component;
- if (tas2770->sdz_gpio)
+ if (tas2770->sdz_gpio) {
gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
+ msleep(1);
+ }
tas2770_reset(tas2770);
--
2.33.0