Re: [PATCH] ARM: BCM5301X: Enable UART0 for SmartRG SR-400AC

["Rafał Miłecki" <zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 24 June 2015 at 01:51, Florian Fainelli <f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Enable the use of UART0 by overriding its default status property.
>
> Signed-off-by: Florian Fainelli <f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts b/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts
> index d6a033b97c70..64a5e8ab65e0 100644
> --- a/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts
> +++ b/arch/arm/boot/dts/bcm4708-smartrg-sr400ac.dts
> @@ -118,3 +118,7 @@
>                 };
>         };
>  };
> +
> +&uart0 {
> +       status = "okay";
> +};

We have many more changes like this in OpenWrt, I just didn't upstream
them because of current chipcommonA state.

It was added before we got "brcm,bus-axi" and I believe Hauke wanted
move it to the "correct" place at some point. Since UART is part of
ChipCommon device and ChipCommon is part of "brcm,bus-axi",.I guess we
should add UARTs as a ChipCommon device subnodes. We already have
chipcommon: chipcommon@0 {
        reg = <0x00000000 0x1000>;

        gpio-controller;
        #gpio-cells = <2>;
};
, is it possible to move UARTs there?

I'm not sure if this UART cleanup should block your change. I guess it
depends on the way it'll finally look like.

I'm also wondering: is there any preference between overwriting status
with something like
&uart0 { };
and
chipcommonA {
    uart0: serial@0300 { };
};
? I don't know DT that well, just asking.

-- 
Rafał
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