On Mon, Mar 16, 2015 at 04:17:55PM +0100, Stefan Agner wrote:
> Forgot to add i.MX/Vybrid maintainers Shawn and Sascha.
>
> On 2015-03-16 16:10, Stefan Agner wrote:
> > The ADC clock frequency is limited depending on modes used. Add
> > device tree property which allow to set the mode used and the
> > maximum frequency ratings for the instance. These allows to
> > set the ADC clock to a frequency which is within specification
> > according to the actual mode used.
> >
> > Acked-by: Fugang Duan <B38611@xxxxxxxxxxxxx>
> > Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
> > ---
> > Documentation/devicetree/bindings/iio/adc/vf610-adc.txt | 9 +++++++++
Bindings doc shouldn't be part of dts change, and needs to be approved
by DT maintainers.
Shawn
> > arch/arm/boot/dts/vfxxx.dtsi | 4 ++++
> > 2 files changed, 13 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
> > b/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
> > index 1a4a43d..3eb40e2 100644
> > --- a/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
> > +++ b/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
> > @@ -11,6 +11,13 @@ Required properties:
> > - clock-names: Must contain "adc", matching entry in the clocks property.
> > - vref-supply: The regulator supply ADC reference voltage.
> >
> > +Recommended properties:
> > +- fsl,adck-max-frequency: Maximum frequencies according to datasheets operating
> > + requirements. Three values are required, depending on conversion mode:
> > + - Frequency in normal mode (ADLPC=0, ADHSC=0)
> > + - Frequency in high-speed mode (ADLPC=0, ADHSC=1)
> > + - Frequency in low-power mode (ADLPC=1, ADHSC=0)
> > +
> > Example:
> > adc0: adc@4003b000 {
> > compatible = "fsl,vf610-adc";
> > @@ -18,5 +25,7 @@ adc0: adc@4003b000 {
> > interrupts = <0 53 0x04>;
> > clocks = <&clks VF610_CLK_ADC0>;
> > clock-names = "adc";
> > + fsl,adck-max-frequency = <30000000>, <40000000>,
> > + <20000000>;
> > vref-supply = <®_vcc_3v3_mcu>;
> > };
> > diff --git a/arch/arm/boot/dts/vfxxx.dtsi b/arch/arm/boot/dts/vfxxx.dtsi
> > index a29c7ce..c6609bd 100644
> > --- a/arch/arm/boot/dts/vfxxx.dtsi
> > +++ b/arch/arm/boot/dts/vfxxx.dtsi
> > @@ -189,6 +189,8 @@
> > clocks = <&clks VF610_CLK_ADC0>;
> > clock-names = "adc";
> > status = "disabled";
> > + fsl,adck-max-frequency = <30000000>, <40000000>,
> > + <20000000>;
> > };
> >
> > wdoga5: wdog@4003e000 {
> > @@ -387,6 +389,8 @@
> > clocks = <&clks VF610_CLK_ADC1>;
> > clock-names = "adc";
> > status = "disabled";
> > + fsl,adck-max-frequency = <30000000>, <40000000>,
> > + <20000000>;
> > };
> >
> > esdhc1: esdhc@400b2000 {
>
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