linux-kernel - Re: [PATCH v2 4/7] dts: sun8i-h3: add UART1-3 to Orange Pi Plus

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Date:   Mon, 5 Sep 2016 21:31:11 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     wens@...e.org, Jorik Jonker <jorik@...pendief.biz>
Cc:     robh+dt@...nel.org, mark.rutland@....com, linux@...linux.org.uk,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/7] dts: sun8i-h3: add UART1-3 to Orange Pi Plus

Hi Jorik,

On Sat, Sep 03, 2016 at 02:09:32PM +0200, Jorik Jonker wrote:
> On Fri, Sep 02, 2016 at 09:04:25AM +0200, Maxime Ripard wrote:
> >Unfortunately, these pins can be used for other purposes as well, so
> >we cannot make force that decision down to our users.
> 
> Yes, but since the associated peripheral is disabled, the users are free to
> configure other functions/peripherals, right? I mean something like this in
> pseudo-DT:
> 
> /soc/pio: pinctrl@...20800/uart1_pins:
>   allwinner,pins = "PG6, PG7";
> /soc/pio: pinctrl@...20800/foo0_pins:
>   allwinner,pins = "PG6, PG7";
>   ..
> /soc/uart1: serial@...ial@...28400:
>   pinctrl-0 = <&uart1_pins>;
>   status = "disabled";
> /soc/bar:
>   pinctrl-0 = <&uart1_pins>;
>   status = "disabled";
> 
> Assuming Linux/DT allows this, this would force nothing, only offer choice
> and ease of use.

Hmm, sorry, I went over your patches too quickly...

That's a great compromise I think. Chen-Yu, any opinion on this?

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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