Re: [PATCH] ARM: dts: exynos5420: Add maudio power domain

Javier Martinez Canillas
2015-02-09T12:58:20Z

Hello Krzysztof,

On 02/09/2015 01:41 PM, Krzysztof Kozlowski wrote:
> Add maudio power domain to Exynos 5420 DTSI file so its state could be
> tracked. This actually won't power down this domain because the pl330
> dmaengine driver (for adma channel) uses IRQ safe runtime PM. Thus the
> patch should not introduce any functional change except of visibility of
> this domain to the system.
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> ---

Your patch looks good to me, I just have two small comments below. With
those changes, feel free to add:

Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>

> arch/arm/boot/dts/exynos5420.dtsi | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
> index 6d38f8bfd0e6..2e99a39f7250 100644
> --- a/arch/arm/boot/dts/exynos5420.dtsi
> +++ b/arch/arm/boot/dts/exynos5420.dtsi
> @@ -270,6 +270,11 @@
> reg = <0x10044120 0x20>;
> };
>
> + mau_pd: power-domain@100440E0 {
> + compatible = "samsung,exynos4210-pd";
> + reg = <0x100440E0 0x20>;

You also need to add #power-domain-cells = <0> here since "power-domain-cells"
is a required property now that the Exynos PD code has been converted to use
the generic power domains lookup.

> + };
> +
> pinctrl_0: pinctrl@13400000 {
> compatible = "samsung,exynos5420-pinctrl";
> reg = <0x13400000 0x1000>;
> @@ -328,6 +333,7 @@
> #dma-cells = <1>;
> #dma-channels = <6>;
> #dma-requests = <16>;
> + samsung,power-domain = <&mau_pd>;

Same here. Even though "samsung,power-domain" is kept as backward compatible,
"power-domains" should be used instead. In fact Marek sent a patch [0] to get
rid of all the current "samsung,power-domain" properties so it would be good
if you can base on top of that one.

Best regards,
Javier

[0]: http://www.spinics.net/lists/linux-samsung-soc/msg40584.html