On Mon, Dec 15, 2014 at 01:02:48PM +0000, Mark Rutland wrote:
> On Mon, Dec 15, 2014 at 11:39:56AM +0000, Nikolaus Schulz wrote:
> > Signed-off-by: Nikolaus Schulz <nikolaus.schulz@xxxxxxxxxxxxxxxxx>
> > ---
> > .../devicetree/bindings/iio/dac/ti-dac8554.txt | 22 ++++++++++++++++++++++
> > 1 file changed, 22 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/iio/dac/ti-dac8554.txt
> >
> > diff --git a/Documentation/devicetree/bindings/iio/dac/ti-dac8554.txt b/Documentation/devicetree/bindings/iio/dac/ti-dac8554.txt
> > new file mode 100644
> > index 0000000..32e96859
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/dac/ti-dac8554.txt
> > @@ -0,0 +1,22 @@
> > +TI DAC8554 Digital to Analog Converter
> > +
> > +This driver supports the SPI bus.
>
> The binding need not refer to the driver, this sentence can go. It might
> be worth adding "(SPI)" to the first line.
OK
> > +
> > +Required properties:
> > + - compatible: must be "ti,dac8554"
> > + - vref-supply: the vref power supply
> > + - ti,address: the additional 2-bit chip address
> > +
> > +For required properties on SPI, please consult
> > +Documentation/devicetree/bindings/spi/spi-bus.txt
> > +
> > +Example:
> > +
> > + dac8554@0 {
> > + compatible = "ti,dac8554";
> > + reg = <0>;
> > + spi-max-frequency = <50000000>;
> > +
> > + vref-supply = <&vdd_vref>;
> > + ti,address = <0>;
>
> What's this property used for?
The DAC8554 has its own addressing scheme, where each chip is assigned a
two-bit address, defined by the state of two pins. So up to 4 DAC8554
can be operated independently on the same SPI bus.
> > + };
>
> Otherwise this looks sane to me.
>
> Mark.
--
Avionic Design GmbH
Nikolaus Schulz
Wragekamp 10
D-22397 Hamburg
Germany
Tel.: +49 40 88187-163
Fax: +49 40 88187-150
Email: nikolaus.schulz@xxxxxxxxxxxxxxxxx
Avionic Design GmbH
Amtsgericht Hamburg HRB 82598
Geschäftsführung: Cornelis Broers
Ust.-Ident-Nr.: DE813378254
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