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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Date:   Fri, 20 Sep 2019 17:55:30 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Discussions about the Letux Kernel <letux-kernel@...nphoenux.org>
Cc:     Andreas Kemnade <andreas@...nade.info>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Rob Herring <robh@...nel.org>,
        Tony Lindgren <tony@...mide.com>,
        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>,
        Linux-OMAP <linux-omap@...r.kernel.org>
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 17:50 schrieb H. Nikolaus Schaller <hns@...delico.com>:
> 
> 
>> 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.

Ok, here is a correction of this statement:

It applies fine to v5.2 and v5.3 already uses the spi-controller.yaml