linux-kernel - Re: [PATCH v2] arm64: dts: meson: Fix mmc cd-gpio polarity

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Date:   Thu, 10 Jan 2019 13:58:35 +0100
From:   Loys Ollivier <lollivier@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Loys Ollivier <lollivier@...libre.com>,
        "open list\:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Kevin Hilman <khilman@...libre.com>,
        "open list\:ARM\/Amlogic Meson..." 
        <linux-amlogic@...ts.infradead.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        Jerome Brunet <jbrunet@...libre.com>
Subject: Re: [PATCH v2] arm64: dts: meson: Fix mmc cd-gpio polarity

Hi,

On Wed 09 Jan 2019 at 22:14, Martin Blumenstingl wrote:

> Hi,
>
> On Wed, Jan 9, 2019 at 7:31 PM Linus Walleij <linus.walleij@...aro.org> 
> wrote:
>>
>> Hi Ollivier!
>>
>> On Wed, Jan 9, 2019 at 2:56 PM Loys Ollivier <lollivier@...libre.com> 
>> wrote:
>>
>> > Commit 89a5e15bcba8 ("gpio/mmc/of: Respect polarity in the device tree")
>> > changed the behavior of "cd-inverted" to follow the device tree bindings
>> > specification.
>> > Lines specifying "cd-inverted" are now "acitve high".
> there's a typo in the description - it should be "active"
>
Thanks I'll fix it.
>> >
>> > Fix the SD card for meson by setting the cd-gpio as "active low" 
>> > according
>> > to the boards specifications.
>> >
>> > Fixes: 89a5e15bcba8 ("gpio/mmc/of: Respect polarity in the device tree")
>> > Signed-off-by: Loys Ollivier <lollivier@...libre.com>
>> >
>> > v2: fix more occurences, also in other meson boards.
>>
>> This is a good change in itself since it gets rid of some occasions
>> of the dreaded "cd-inverted" property. I think Martin Blumenstingl
>> already sent patches like these though (I might be confused).
> I sent patches for the 32-bit Amlogic SoCs
> my TODO-list is now a bit longer, I'll test this series on my Khadas
> VIM, VIM2 and Libretech CC during the weekend
>
I have seen Martin's patch for the arm boards.
This adresses arm64 boards.
Tested on libretech-cc.

>> But we should keep the old device trees working as well.
>> Can you test if Martins patch:
>> https://marc.info/?l=linux-mmc&m=154637189021211&w=2
>>
>> Also makes your boards work?
> feedback on that patch is appreciated
>
Answered to the patch mail directly. Tested on libretech-cc, it works.
Fixing the meson boards DT for future release would still be valid imho.

>
> Regards
> Martin

Best,
Loys
-- 
-L