diff options
| author | Peter Seiderer <ps.report@gmx.net> | 2019-02-11 22:06:30 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-02-12 14:15:00 +0000 |
| commit | 674f9abd094552dc297a2afd0cb72d30aec539a3 (patch) | |
| tree | f2d6f61ad74c1b975a1763602c67c144b748c2fc /sound/soc/codecs | |
| parent | fc23af99e47612042964ace44121872158ae834d (diff) | |
tlv320aic32x4: delay i2c access by 1 ms after hardware reset
As stated in 'TLV320AIC3254 Application Reference Guide' ([1]):
3.2 Device Startup Lockout Times
After the TLV320AIC3254 initializes through hardware reset at power-up
or software reset, the internal registers initialize to default values.
This initialization takes place within 1ms after pulling the RESET
signal high. During this initialization phase, no register-read or
register-write operation should be performed on ADC or DAC coefficient
buffers. Also, no block within the codec should be powered up during
the initialization phase.
[1] http://www.ti.com/lit/an/slaa408a/slaa408a.pdf
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/tlv320aic32x4.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c index e1bfba62fc08..96f1526cb258 100644 --- a/sound/soc/codecs/tlv320aic32x4.c +++ b/sound/soc/codecs/tlv320aic32x4.c @@ -970,6 +970,7 @@ static int aic32x4_component_probe(struct snd_soc_component *component) if (gpio_is_valid(aic32x4->rstn_gpio)) { ndelay(10); gpio_set_value(aic32x4->rstn_gpio, 1); + mdelay(1); } snd_soc_component_write(component, AIC32X4_RESET, 0x01); |