On Mon, Jun 20, 2016 at 11:45:19AM -0500, Paul.Handrigan@cirrus.com wrote:
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 | 118 +++++++++++++++++++++ 1 file changed, 118 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..bea6de7 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/cs35l33.txt @@ -0,0 +1,118 @@ +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)
- cirrus,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 3300mV with
- a value of 1 and will increase at a step size of 100mV until a maximum of
- 8000mV.
- cirrus,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.
- cirrus,boost-ipk : The maximum current allowed for the boost converter.
- The range starts at 1850000uA and goes to a maximum of 3600000uA
- with a step size of 15625uA. The default is 2500000uA.
- cirrus,imon-adc-scale : Configures the scaling of data bits from the IMON
- ADC data word. This property can be set as a value of 0 for bits 15 down
- to 0, 6 for 21 down to 6, 7, for 22 down to 7, 8 for 23 down to 8.
- cirrus,hg-algo : Parameters for internal Class H/G algorithm that
- controls the amplifier supplies.
It is not clear that this is a node not a property, and everything below is part of the sub-node. The example is not the binding documentation. I should be able to write the example or validate the binding based on the documentation.
- cirrus,mem-depth : Memory depth for the Class H/G algorithm measured in
- LRCLK cycles. If this property is set to 0, 1, 2, or 3 then the memory
- depths will be 1, 4, 8, 16 LRCLK cycles. The default is 16 LRCLK cycles.