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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-03-18 15:19:10 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-03-18 18:31:53 +0000 |
| commit | e3598f6e4218d1aad3369c97217266b2375e6aca (patch) | |
| tree | c2a34a3c806ffb7001aac6a9ce52525a7da6ed15 /sound/soc | |
| parent | da88b48b84e1a504b6a19aff9d5b8236a59e228a (diff) | |
| download | linux-3.10-e3598f6e4218d1aad3369c97217266b2375e6aca.tar.gz linux-3.10-e3598f6e4218d1aad3369c97217266b2375e6aca.tar.bz2 linux-3.10-e3598f6e4218d1aad3369c97217266b2375e6aca.zip | |
ASoC: Further optimise WM8400 bias configuration sequence
The active discharge does not bring sufficient benefit to justify the
lengthy times involved so don't do that.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/codecs/wm8400.c | 27 |
1 files changed, 2 insertions, 25 deletions
diff --git a/sound/soc/codecs/wm8400.c b/sound/soc/codecs/wm8400.c index 744e0dc73be..462f8b0d9ac 100644 --- a/sound/soc/codecs/wm8400.c +++ b/sound/soc/codecs/wm8400.c @@ -1096,45 +1096,22 @@ static int wm8400_set_bias_level(struct snd_soc_codec *codec, wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, WM8400_CODEC_ENA | WM8400_SYSCLK_ENA); - /* Enable all output discharge bits */ - wm8400_write(codec, WM8400_ANTIPOP1, WM8400_DIS_LLINE | - WM8400_DIS_RLINE | WM8400_DIS_OUT3 | - WM8400_DIS_OUT4 | WM8400_DIS_LOUT | - WM8400_DIS_ROUT); - /* Enable POBCTRL, SOFT_ST, VMIDTOG and BUFDCOPEN */ wm8400_write(codec, WM8400_ANTIPOP2, WM8400_SOFTST | WM8400_BUFDCOPEN | WM8400_POBCTRL); - msleep(500); - - /* Enable outputs */ - val = wm8400_read(codec, WM8400_POWER_MANAGEMENT_1); - val |= WM8400_SPK_ENA | WM8400_OUT3_ENA | - WM8400_OUT4_ENA | WM8400_LOUT_ENA | - WM8400_ROUT_ENA; - wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, val); - - /* disable all output discharge bits */ - wm8400_write(codec, WM8400_ANTIPOP1, 0); + msleep(50); /* Enable VREF & VMID at 2x50k */ + val = wm8400_read(codec, WM8400_POWER_MANAGEMENT_1); val |= 0x2 | WM8400_VREF_ENA; wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, val); - msleep(600); - /* Enable BUFIOEN */ wm8400_write(codec, WM8400_ANTIPOP2, WM8400_SOFTST | WM8400_BUFDCOPEN | WM8400_POBCTRL | WM8400_BUFIOEN); - /* Disable outputs */ - val &= ~(WM8400_SPK_ENA | WM8400_OUT3_ENA | - WM8400_OUT4_ENA | WM8400_LOUT_ENA | - WM8400_ROUT_ENA); - wm8400_write(codec, WM8400_POWER_MANAGEMENT_1, val); - /* disable POBCTRL, SOFT_ST and BUFDCOPEN */ wm8400_write(codec, WM8400_ANTIPOP2, WM8400_BUFIOEN); } |