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ASoC: Implement new DC servo readback mode for late WM8994 revisions

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Later WM8994 devices implement a new DC servo readback mode with the
register used to access the offset moved to register 0x59. Implement
support for this and enable it on the appropriate devices.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
This commit is contained in:
Mark Brown
2011-08-01 13:02:17 +09:00
parent 25032c119e
commit 79ef0abcd8
3 changed files with 18 additions and 5 deletions
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3
sound/soc/codecs/wm8994.c
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@@ -107,6 +107,7 @@ static int wm8994_volatile(struct snd_soc_codec *codec, unsigned int reg)
case WM8994_LDO_2:
case WM8958_DSP2_EXECCONTROL:
case WM8958_MIC_DETECT_3:
case WM8994_DC_SERVO_4E:
return 1;
default:
return 0;
@@ -2978,7 +2979,7 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
wm8994->hubs.series_startup = 1;
break;
default:
wm8994->hubs.dcs_readback_mode = 1;
wm8994->hubs.dcs_readback_mode = 2;
break;
}