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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-02-10 18:09:42 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-02-11 23:11:21 +0000 |
| commit | d60d6c3b65fa2156ec95d96f73e34cdb0c586458 (patch) | |
| tree | 927fecb5b0947117929715993dfa3c2ef20287b9 | |
| parent | 5f2f38904019bbffb107767c55d9e781c94941ef (diff) | |
| download | blackbird-obmc-linux-d60d6c3b65fa2156ec95d96f73e34cdb0c586458.tar.gz blackbird-obmc-linux-d60d6c3b65fa2156ec95d96f73e34cdb0c586458.zip | |
ASoC: wm_hubs: Clamp inputs to VMID while we ramp
Reduces the amount of time taken to stabilise them.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| -rw-r--r-- | sound/soc/codecs/wm8993.h | 9 | ||||
| -rw-r--r-- | sound/soc/codecs/wm_hubs.c | 10 |
2 files changed, 19 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8993.h b/sound/soc/codecs/wm8993.h index 2184617b9611..4478b40c86e3 100644 --- a/sound/soc/codecs/wm8993.h +++ b/sound/soc/codecs/wm8993.h @@ -31,6 +31,7 @@ #define WM8993_GPIO_CTRL_1 0x12 #define WM8993_GPIO1 0x13 #define WM8993_IRQ_DEBOUNCE 0x14 +#define WM8993_INPUTS_CLAMP_REG 0x15 #define WM8993_GPIOCTRL_2 0x16 #define WM8993_GPIO_POL 0x17 #define WM8993_LEFT_LINE_INPUT_1_2_VOLUME 0x18 @@ -656,6 +657,14 @@ #define WM8993_GPIO1_DB_WIDTH 1 /* GPIO1_DB */ /* + * R21 (0x15) - Inputs Clamp + */ +#define WM8993_INPUTS_CLAMP 0x0040 /* INPUTS_CLAMP */ +#define WM8993_INPUTS_CLAMP_MASK 0x0040 /* INPUTS_CLAMP */ +#define WM8993_INPUTS_CLAMP_SHIFT 7 /* INPUTS_CLAMP */ +#define WM8993_INPUTS_CLAMP_WIDTH 1 /* INPUTS_CLAMP */ + +/* * R22 (0x16) - GPIOCTRL 2 */ #define WM8993_IM_JD2_EINT 0x2000 /* IM_JD2_EINT */ diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c index f7650c5cc5c2..9742c666cd0a 100644 --- a/sound/soc/codecs/wm_hubs.c +++ b/sound/soc/codecs/wm_hubs.c @@ -1040,6 +1040,12 @@ void wm_hubs_set_bias_level(struct snd_soc_codec *codec, int val; switch (level) { + case SND_SOC_BIAS_STANDBY: + /* Clamp the inputs to VMID while we ramp to charge caps */ + snd_soc_update_bits(codec, WM8993_INPUTS_CLAMP_REG, + WM8993_INPUTS_CLAMP, WM8993_INPUTS_CLAMP); + break; + case SND_SOC_BIAS_ON: /* Turn off any unneded single ended outputs */ val = 0; @@ -1067,6 +1073,10 @@ void wm_hubs_set_bias_level(struct snd_soc_codec *codec, !hubs->lineout2n_ena && !hubs->lineout2p_ena) snd_soc_update_bits(codec, WM8993_ANTIPOP1, WM8993_LINEOUT_VMID_BUF_ENA, 0); + + /* Remove the input clamps */ + snd_soc_update_bits(codec, WM8993_INPUTS_CLAMP_REG, + WM8993_INPUTS_CLAMP, 0); break; default: |
