On Mon, Jun 20, 2016 at 11:45:19AM -0500, Paul.Handrigan@xxxxxxxxxx wrote: > From: Paul Handrigan <Paul.Handrigan@xxxxxxxxxx> > > Add device tree bindings file for the cs35l33 8V boosted > class D amplifier. > > Signed-off-by: Paul Handrigan <Paul.Handrigan@xxxxxxxxxx> > --- > .../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. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
