On Mon, 16 May 2016, Rob Herring wrote: > On Fri, May 13, 2016 at 04:02:53PM -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 | 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 > > + - 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. > > Can you just specify this is microvolts? Looks like an easy conversion. Yes, I can change that. > > > + > > + - 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. > OK. Thanks! > Either use time units or add vendor prefix. > > > + - 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). > > Can this be in microamps? > Yes. > Are these standard/typical properties for Class D amps? Not typical for class D amps in general, but some would be fairly common for boosted class D amps. For example boost current maximum should be fairly common. It is standard for all Cirrus class D boosted amps. > > > + > > + - hg-algo : Parameters for internal Class H/G algorithm that > > + controls the amplifier supplies. > > Each property in this node needs to be defined. OK. Will do. > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
