Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / sound / ti,tas5086.txt

diff --git a/kernel/Documentation/devicetree/bindings/sound/ti,tas5086.txt b/kernel/Documentation/devicetree/bindings/sound/ti,tas5086.txt
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+Texas Instruments TAS5086 6-channel PWM Processor
+
+Required properties:
+
+ - compatible:         Should contain "ti,tas5086".
+ - reg:                        The i2c address. Should contain <0x1b>.
+
+Optional properties:
+
+ - reset-gpio:                 A GPIO spec to define which pin is connected to the
+                       chip's !RESET pin. If specified, the driver will
+                       assert a hardware reset at probe time.
+
+ - ti,charge-period:   This property should contain the time in microseconds
+                       that closely matches the external single-ended
+                       split-capacitor charge period. The hardware chip
+                       waits for this period of time before starting the
+                       PWM signals. This helps reduce pops and clicks.
+
+                       When not specified, the hardware default of 1300ms
+                       is retained.
+
+ - ti,mid-z-channel-X: Boolean properties, X being a number from 1 to 6.
+                       If given, channel X will start with the Mid-Z start
+                       sequence, otherwise the default Low-Z scheme is used.
+
+                       The correct configuration depends on how the power
+                       stages connected to the PWM output pins work. Not all
+                       power stages are compatible to Mid-Z - please refer
+                       to the datasheets for more details.
+
+                       Most systems should not set any of these properties.
+
+ - avdd-supply:         Power supply for AVDD, providing 3.3V
+ - dvdd-supply:         Power supply for DVDD, providing 3.3V
+
+Examples:
+
+       i2c_bus {
+               tas5086@1b {
+                       compatible = "ti,tas5086";
+                       reg = <0x1b>;
+                       reset-gpio = <&gpio 23 0>;
+                       ti,charge-period = <156000>;
+                       avdd-supply = <&vdd_3v3_reg>;
+                       dvdd-supply = <&vdd_3v3_reg>;
+               };
+       };