ASoC: rt5640: Add devicetree-bindings for dmic, jack-detect

Add devicetree-bindings for the dmic, jack-detect source and overcurrent-
detect threshold settings.

The dmic bindings mirror the existing bindings for the rt5645.
The jd-src and ovcd bindings mirror the existing bindings for the rt5651.

Cc devicetree@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rt5640.txt

@@ -22,6 +22,41 @@ Optional properties:
 
 - realtek,ldo1-en-gpios : The GPIO that controls the CODEC's LDO1_EN pin.
 
+- realtek,dmic1-data-pin
+  0: dmic1 is not used
+  1: using IN1P pin as dmic1 data pin
+  2: using GPIO3 pin as dmic1 data pin
+
+- realtek,dmic2-data-pin
+  0: dmic2 is not used
+  1: using IN1N pin as dmic2 data pin
+  2: using GPIO4 pin as dmic2 data pin
+
+- realtek,jack-detect-source
+  u32. Valid values:
+  0: jack-detect is not used
+  1: Use GPIO1 for jack-detect
+  2: Use JD1_IN4P for jack-detect
+  3: Use JD2_IN4N for jack-detect
+  4: Use GPIO2 for jack-detect
+  5: Use GPIO3 for jack-detect
+  6: Use GPIO4 for jack-detect
+
+- realtek,jack-detect-not-inverted
+  bool. Normal jack-detect switches give an inverted signal, set this bool
+  in the rare case you've a jack-detect switch which is not inverted.
+
+- realtek,over-current-threshold-microamp
+  u32, micbias over-current detection threshold in µA, valid values are
+  600, 1500 and 2000µA.
+
+- realtek,over-current-scale-factor
+  u32, micbias over-current detection scale-factor, valid values are:
+  0: Scale current by 0.5
+  1: Scale current by 0.75
+  2: Scale current by 1.0
+  3: Scale current by 1.5
+
 Pins on the device (for linking into audio routes) for RT5639/RT5640:
 
   * DMIC1

include/dt-bindings/sound/rt5640.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __DT_RT5640_H
+#define __DT_RT5640_H
+
+#define RT5640_DMIC1_DATA_PIN_NONE	0
+#define RT5640_DMIC1_DATA_PIN_IN1P	1
+#define RT5640_DMIC1_DATA_PIN_GPIO3	2
+
+#define RT5640_DMIC2_DATA_PIN_NONE	0
+#define RT5640_DMIC2_DATA_PIN_IN1N	1
+#define RT5640_DMIC2_DATA_PIN_GPIO4	2
+
+#define RT5640_JD_SRC_GPIO1		1
+#define RT5640_JD_SRC_JD1_IN4P		2
+#define RT5640_JD_SRC_JD2_IN4N		3
+#define RT5640_JD_SRC_GPIO2		4
+#define RT5640_JD_SRC_GPIO3		5
+#define RT5640_JD_SRC_GPIO4		6
+
+#define RT5640_OVCD_SF_0P5		0
+#define RT5640_OVCD_SF_0P75		1
+#define RT5640_OVCD_SF_1P0		2
+#define RT5640_OVCD_SF_1P5		3
+
+#endif /* __DT_RT5640_H */