ASoC: Provide microphone bias configuration for WM8962

Add the widget for MICBIAS power control and allow configuration of the
microphone bias setup via the platform data for the WM8962. When
microphone status signals are brought out to GPIO this should be
sufficient to enable microphone detection.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 12 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 4fa5de873c8b..be34146a775b 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -630,6 +630,8 @@ SND_SOC_DAPM_INPUT("IN4L"),
 SND_SOC_DAPM_INPUT("IN4R"),
 SND_SOC_DAPM_INPUT("Beep"),
 
+SND_SOC_DAPM_MICBIAS("MICBIAS", WM8962_PWR_MGMT_1, 1, 0),
+
 SND_SOC_DAPM_SUPPLY("Class G", WM8962_CHARGE_PUMP_B, 0, 1, NULL, 0),
 SND_SOC_DAPM_SUPPLY("SYSCLK", WM8962_CLOCKING2, 5, 0, sysclk_event,
                     SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
@@ -1755,6 +1757,16 @@ static int wm8962_probe(struct snd_soc_codec *codec)
                 if (pdata->spk_mono)
                         wm8962->reg_cache[WM8962_CLASS_D_CONTROL_2]
                                 |= WM8962_SPK_MONO;
+
+                /* Micbias setup, detection enable and detection
+                 * threasholds. */
+                if (pdata->mic_cfg)
+                        snd_soc_update_bits(codec, WM8962_ADDITIONAL_CONTROL_4,
+                                            WM8962_MICDET_ENA |
+                                            WM8962_MICDET_THR_MASK |
+                                            WM8962_MICSHORT_THR_MASK |
+                                            WM8962_MICBIAS_LVL,
+                                            pdata->mic_cfg);
         }
 
         /* Latch volume update bits */