linux-kernel - Re: [PATCH 3/3] ARM: dts: da850: Add node for pullup/pulldown pinconf

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Message-ID: <263cdd6d-ed04-647e-a4e9-4e3e094e54d9@ti.com>
Date:   Thu, 24 Nov 2016 11:24:47 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     David Lechner <david@...hnology.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...nel.org>
CC:     <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Axel Haslam <ahaslam@...libre.com>,
        Alexandre Bailon <abailon@...libre.com>,
        Bartosz Gołaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 3/3] ARM: dts: da850: Add node for pullup/pulldown pinconf

On Wednesday 23 November 2016 09:54 PM, David Lechner wrote:
> On 11/23/2016 05:12 AM, Sekhar Nori wrote:
>> On Wednesday 23 November 2016 08:59 AM, David Lechner wrote:
>>> This SoC has a separate pin controller for configuring pullup/pulldown
>>> bias on groups of pins.
>>>
>>> Signed-off-by: David Lechner <david@...hnology.com>
>>> ---
>>>  arch/arm/boot/dts/da850.dtsi | 5 +++++
>>>  1 file changed, 5 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>>> index 8945815..1c0224c 100644
>>> --- a/arch/arm/boot/dts/da850.dtsi
>>> +++ b/arch/arm/boot/dts/da850.dtsi
>>> @@ -210,6 +210,11 @@
>>>              };
>>>
>>>          };
>>> +        pinconf: pin-controller@...00c {
>>> +            compatible = "ti,da850-pupd";
>>> +            reg = <0x22c00c 0x8>;
>>> +            status = "disabled";
>>> +        };
>>
>> Can you please place this below the i2c1 node. I am trying to keep the
>> nodes sorted by unit address. I know thats broken in many places today,
>> but lets add the new ones where they should eventually end up.
> 
> I can do this, but it seems that the predominant sorting pattern here is
> to keep subsystems together (e.g. all i2c are together, all uart are
> together, etc.)

Yeah, but that quickly gives away as there are many singleton devices
and everyone tries to add theirs at the end of the list resulting in
merge conflicts.

> Would a separate patch to sort everything by unit address to get this
> cleaned up be acceptable?

Agree with Kevin that it would be churn. If done, it should be last
thing that gets done in a merge window. I would not attempt it in
relatively busy merge windows like this one.

Thanks,
Sekhar