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+RT5640/RT5639 audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+- compatible : One of "realtek,rt5640" or "realtek,rt5639".
+
+- reg : The I2C address of the device.
+
+- interrupts : The CODEC's interrupt output.
+
+Optional properties:
+
+- clocks: The phandle of the master clock to the CODEC
+- clock-names: Should be "mclk"
+
+- realtek,in1-differential
+- realtek,in2-differential
+- realtek,in3-differential
+ Boolean. Indicate MIC1/2/3 input are differential, rather than single-ended.
+
+- realtek,lout-differential
+ Boolean. Indicate LOUT output is differential, rather than stereo.
+
+- 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
+ * DMIC2
+ * MICBIAS1
+ * IN1P
+ * IN1N
+ * IN2P
+ * IN2N
+ * IN3P
+ * IN3N
+ * HPOL
+ * HPOR
+ * LOUTL
+ * LOUTR
+ * SPOLP
+ * SPOLN
+ * SPORP
+ * SPORN
+
+Additional pins on the device for RT5640:
+
+ * MONOP
+ * MONON
+
+Example:
+
+rt5640 {
+ compatible = "realtek,rt5640";
+ reg = <0x1c>;
+ interrupt-parent = <&gpio>;
+ interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_HIGH>;
+ realtek,ldo1-en-gpios =
+ <&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_HIGH>;
+};