linux-kernel - Re: [Letux-kernel] [PATCH 2/2] DTS: ARM: gta04: introduce legacy spi-cs-high to make display work again

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Message-Id: <96E62EC2-2A3E-4722-A9DE-3F320B0A98B0@goldelico.com>
Date:   Fri, 20 Sep 2019 17:50:06 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     Discussions about the Letux Kernel <letux-kernel@...nphoenux.org>,
        Tony Lindgren <tony@...mide.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh@...nel.org>,
        Linux-OMAP <linux-omap@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>,
        Benoît Cousson <bcousson@...libre.com>
Subject: Re: [Letux-kernel] [PATCH 2/2] DTS: ARM: gta04: introduce legacy spi-cs-high to make display work again


> Am 20.09.2019 um 17:29 schrieb Andreas Kemnade <andreas@...nade.info>:
> 
> On Fri, 20 Sep 2019 16:54:18 +0200
> "H. Nikolaus Schaller" <hns@...delico.com> wrote:
> 
>>> Am 20.09.2019 um 16:20 schrieb Tony Lindgren <tony@...mide.com>:
>>> 
>>> * H. Nikolaus Schaller <hns@...delico.com> [190920 09:19]:  
>>>>> Am 20.09.2019 um 10:55 schrieb Linus Walleij <linus.walleij@...aro.org>:
>>>>> I suggest to go both way:
>>>>> apply this oneliner and tag for stable so that GTA04 works
>>>>> again.
>>>>> 
>>>>> Then for the next kernel think about a possible more abitious
>>>>> whitelist solution and after adding that remove *all* "spi-cs-high"
>>>>> flags from all device trees in the kernel after fixing them
>>>>> all up.  
>>>> 
>>>> Ok, that looks like a viable path.  
>>> 
>>> Please repost the oneline so people can ack easily. At least
>>> I've already lost track of this thread.  
>> 
>> It is all here:
>> 
>> https://patchwork.kernel.org/patch/11035253/
>> 
> It is the full one (incl. documentation), not the oneline and does not
> apply.

Looks as if it was sitting too long in the queue and linux-next has changed
the basis in the meantime, while v5.3 has not yet.

Documentation/devicetree/bindings/spi/spi-bus.txt -> spi-controller.yaml

So it should still apply for v5.3.1 and earlier and we need both versions.
One for stable and one for linux-next. I don't know how to handle such cases.

BR,
Nikolaus