Hi Mark,

On Monday 01 of July 2013 22:36:37 Mark Brown wrote:
> From: Mark Brown <[email protected]>
> 
> Fixed voltage regulators (and other similar free standing things) are
> supposed to go on a simple-bus for DT correctness reasons.
> 
> Signed-off-by: Mark Brown <[email protected]>
> ---
>  arch/arm/boot/dts/exynos5250-arndale.dts | 28
> +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11
> deletions(-)
> 
> diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts
> b/arch/arm/boot/dts/exynos5250-arndale.dts index abc7272..68a13a6
> 100644
> --- a/arch/arm/boot/dts/exynos5250-arndale.dts
> +++ b/arch/arm/boot/dts/exynos5250-arndale.dts
> @@ -429,18 +429,24 @@
>               vdd-supply = <&ldo8_reg>;
>       };
> 
> -     mmc_reg: voltage-regulator {
> -             compatible = "regulator-fixed";
> -             regulator-name = "VDD_33ON_2.8V";
> -             regulator-min-microvolt = <2800000>;
> -             regulator-max-microvolt = <2800000>;
> -             gpio = <&gpx1 1 1>;
> -             enable-active-high;
> -     };
> +     regulators {
> +             compatible = "simple-bus";
> +             #address-cells = <1>;
> +             #size-cells = <0>;

Are the two #properties above really necessary? The regulators that will 
be placed here probably don't need any kind of addressing, so it should be 
possible to omit them.

> +
> +             mmc_reg: voltage-regulator {

I'd suggest suffixing name of this node with an index, like voltage-
regulator-0 to be more future proof, in case of further fixed regulators 
being added.

> +                     compatible = "regulator-fixed";
> +                     regulator-name = "VDD_33ON_2.8V";
> +                     regulator-min-microvolt = <2800000>;
> +                     regulator-max-microvolt = <2800000>;
> +                     gpio = <&gpx1 1 1>;
> +                     enable-active-high;
> +             };
> 
> -     reg_hdmi_en: fixedregulator@0 {
> -             compatible = "regulator-fixed";
> -             regulator-name = "hdmi-en";
> +             reg_hdmi_en: fixedregulator@0 {

And here I'd use the same convention of suffixes, renaming the node to 
voltage-regulator-1 for the sake of consistency.

Best regards,
Tomasz

> +                     compatible = "regulator-fixed";
> +                     regulator-name = "hdmi-en";
> +             };
>       };
> 
>       fixed-rate-clocks {
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