From: Paul Handrigan Paul.Handrigan@cirrus.com
Add device tree bindings file for the cs35l33 8V boosted class D amplifier.
Signed-off-by: Paul Handrigan Paul.Handrigan@cirrus.com --- .../devicetree/bindings/sound/cs35l33.txt | 73 ++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/cs35l33.txt
diff --git a/Documentation/devicetree/bindings/sound/cs35l33.txt b/Documentation/devicetree/bindings/sound/cs35l33.txt new file mode 100644 index 0000000..273d73a --- /dev/null +++ b/Documentation/devicetree/bindings/sound/cs35l33.txt @@ -0,0 +1,73 @@ +CS35L33 Speaker Amplifier + +Required properties: + + - compatible : "cirrus,cs35l33" + + - reg : the I2C address of the device for I2C + + - VA-supply, VP-supply : power supplies for the device, + as covered in + Documentation/devicetree/bindings/regulator/regulator.txt. + +Optional properties: + + - reset-gpios : gpio used to reset the amplifier + + - interrupt-parent : Specifies the phandle of the interrupt controller to + which the IRQs from CS35L33 are delivered to. + - interrupts : IRQ line info CS35L33. + (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt + for further information relating to interrupt properties) + + - boost-ctl : Booster voltage use to supply the amp. If the value is + 0, then VBST = VP. If greater than 0, the boost voltage will be 3.3V with + a value of 1 and will increase at a step size of 0.1V until a maximum of + 8.0V. + + - ramp-rate : On power up, it affects the time from when the power + up sequence begins to the time the audio reaches a full-scale output. + On power down, it affects the time from when the power-down sequence + begins to when the amplifier disables the PWM outputs. If this property + is not set then soft ramping will be disabled and ramp time would be + 20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms, + 60ms,100ms,175ms respectively for 48KHz sample rate. + + - boost-ipk : The maximum current allowed for the boost converter. + The range starts at 1.85A (0xF0) and goes to a maximum of 3.60A (0xE0) + with a step size of 0.015625A. The default is 2.50A (0x90). + + - hg-algo : Parameters for internal Class H/G algorithm that + controls the amplifier supplies. + +Example: + +cs35l33: cs35l33@40 { + compatible = "cirrus,cs35l33"; + reg = <0x40>; + + VA-supply = <&ldo5_reg>; + VP-supply = <&ldo5_reg>; + + interrupt-parent = <&gpio8>; + interrupts = <3 IRQ_TYPE_LEVEL_LOW>; + + reset-gpios = <&cs47l91 34 0>; + + ramp-rate = <0x0>; + boost-ctl = <0x30>; /* VBST = 8.0V */ + boost-ipk = <0xE0>; /* 3.60A */ + + hg-algo { + mem-depth = <0x3>; + release-rate = <0x3>; + hd-rm = <0xA>; + ldo-thld = <0x1>; + ldo-path-disable = <0x0>; + ldo-entry-delay=<0x4>; + vp-hg-auto; + vp-hg=<0xF>; + vp-hg-rate=<0x2>; + vp-hg-va=<0x0>; + }; +};