linux-kernel - Re: [PATCH] ARM: dts: da850: use gpio-ranges

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Message-ID: <be660007-cf4b-bf01-d811-a456af74bb49@ti.com>
Date:   Fri, 23 Feb 2018 17:14:56 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        David Lechner <david@...hnology.com>
CC:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Kevin Hilman <khilman@...nel.org>,
        Haojian Zhuang <haojian.zhuang@...aro.org>,
        Tony Lindgren <tony@...mide.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: da850: use gpio-ranges

On Thursday 22 February 2018 09:04 PM, Linus Walleij wrote:
> On Mon, Feb 19, 2018 at 11:29 PM, David Lechner <david@...hnology.com> wrote:
> 
>> This makes use of the gpio-ranges feature that connects GPIO
>> controllers and PINMUX controllers.
>>
>> In da850.dtsi, pinctrl-single,gpio-range is added to the pinmux node
>> and gpio-ranges is added to the GPIO node. Unfortunately, the way the
>> pinctrl-single driver enumerates the pins (starting with LSB) causes
>> them to be in reverse order compared to the way the gpios are assigned.
>> As a result, we have to declare the mapping for each GPIO individually.
>>
>> This also lets us remove all of the GPIO pinmuxes from
>> da850-lego-ev3.dts. (Other da850 boards do not currently have any
>> GPIO pinmuxes declared.)
>>
>> Signed-off-by: David Lechner <david@...hnology.com>
> 
> Nice,
> Acked-by: Linus Walleij <linus.wallei@...aro.org>

Looks good to me too. And quite painstakingly done!

I suppose this needs to wait a bit due to the dependencies? Let me know
once its okay to merge.

Thanks,
Sekhar