ASoC: sun50i-codec-analog: Internal bias support

Merge series from Samuel Holland <samuel@sholland.org>:

This series adds support for enabling the codec's internal microphone
bias, which is needed on at least some versions of the PinePhone.

Changes in v2:
 - Move register update from component probe to device probe

Arnaud Ferraris (2):
  ASoC: dt-bindings: sun50i-codec: Add binding for internal bias
  ASoC: sun50i-codec-analog: Add support for internal bias

Samuel Holland (1):
  arm64: dts: allwinner: pinephone: Enable internal HMIC bias

 .../bindings/sound/allwinner,sun50i-a64-codec-analog.yaml | 5 +++++
 .../arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts | 4 ++++
 .../arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts | 4 ++++
 sound/soc/sunxi/sun50i-codec-analog.c                     | 8 ++++++++
 4 files changed, 21 insertions(+)

--
2.35.1

Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml

@@ -21,6 +21,11 @@ properties:
     description:
       Regulator for the headphone amplifier
 
+  allwinner,internal-bias-resistor:
+    description:
+      Enable the internal 2.2K bias resistor between HBIAS and MICDET pins
+    type: boolean
+
 required:
   - compatible
   - reg

sound/soc/sunxi/sun50i-codec-analog.c

@@ -117,6 +117,7 @@
 #define SUN50I_ADDA_HS_MBIAS_CTRL_MMICBIASEN	7
 
 #define SUN50I_ADDA_JACK_MIC_CTRL	0x1d
+#define SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN	6
 #define SUN50I_ADDA_JACK_MIC_CTRL_HMICBIASEN	5
 
 /* mixer controls */
@@ -507,6 +508,7 @@ static int sun50i_codec_analog_probe(struct platform_device *pdev)
 {
 	struct regmap *regmap;
 	void __iomem *base;
+	bool enable;
 
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base)) {
@@ -520,6 +522,12 @@ static int sun50i_codec_analog_probe(struct platform_device *pdev)
 		return PTR_ERR(regmap);
 	}
 
+	enable = device_property_read_bool(&pdev->dev,
+					   "allwinner,internal-bias-resistor");
+	regmap_update_bits(regmap, SUN50I_ADDA_JACK_MIC_CTRL,
+			   BIT(SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN),
+			   enable << SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN);
+
 	return devm_snd_soc_register_component(&pdev->dev,
 					       &sun50i_codec_analog_cmpnt_drv,
 					       NULL, 0);