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<3f9af46e-2e1a-771f-57f2-86a53caaf94a@suse.com> <09f82f88-a13a-b441-b723-7bb061a2f1e3@gmail.com> <2c3e1ef3-0dba-9f79-52e2-314b6b500e14@gmx.net> <4a6f965b-c988-5839-169f-9f24a0e7a567@suse.com> <48a6b72d-d554-b563-5ed6-9a79db5fb4ab@gmx.net> <2fcc5ad6-fa90-6565-e75c-d20b46965733@suse.com> <3163f80b-72e5-5da8-0909-a8950d3669f7@gmx.net> From: Matthias Brugger Openpgp: preference=signencrypt Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa OhLZuSKB1F5JcvLbETRjNzNU7B3TdS2+zkgQQdEyt7Ij2HXGLJ2w+yG2GuR9/iyCJRf10Okq gTh//XESJZ8S6KlOWbLXRE+yfkKDXQx2Jr1XuVvM3zPqH5FMg8reRVFsQ+vI0b+OlyekT/Xe 0Hwvqkev95GG6x7yseJwI+2ydDH6M5O7fPKFW5mzAdDE2g/K9B4e2tYK6/rA7Fq4cqiAw1+u EgO44+eFgv082xtBez5WNkGn18vtw0LW3ESmKh19u6kEGoi0WZwslCNaGFrS4M7OH+aOJeqK fx5dIv2CEbxc6xnHY7dwkcHikTA4QdbdFeUSuj4YhIZ+0QlDVtS1QEXyvZbZky7ur9rHkZvP 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Cic58CYMD1rSonCnbfUeyZYNNhNHZosl4dl7f+am87Q2x3pK0DLSoJRxWb7vZB0uo9CzCSm3 I++aYozF25xQoT+7zCx2cQi33jwvnJAK1o4VlNx36RfrxzBqc1uZGzJBCQu48UjmUSsTwWC3 HpE/D9sM+xACs803lFUIZC5H62G059cCPAXKgsFpNMKmBAWweBkVJAisoQeX50OP+/11ArV0 cv+fOTfJj0/KwFXJaaYh3LUQNILLBNxkSrhCLl8dUg53IbHx4NfIAgqxLWGfXM8DY1aFdU79 pac005PuhxCWkKTJz3gCmznnoat4GCnL5gy/m0Qk45l4PFqwWXVLo9AQg2Kp3mlIFZ6fsEKI AN5hxlbNvNb9V2Zo5bFZjPWPFTxOteM0omUAS+QopwU0yPLLGJVf2iCmItHcUXI+r2JwH1CJ jrHWeQEI2ucSKsNa8FllDmG/fQ== Message-ID: <197ebc29-2e4d-fa2c-7ad4-1a83ce3f3eb4@gmail.com> Date: Tue, 17 Sep 2019 11:04:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190917_020506_663668_89FDF5E8 X-CRM114-Status: GOOD ( 26.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: f.fainelli@gmail.com, phil@raspberrypi.org, linux-rpi-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 16/09/2019 21:19, Stefan Wahren wrote: > Hi Matthias, > > [drop uninvolved receiver] > > Am 13.09.19 um 12:39 schrieb Matthias Brugger: >> >>>>>> If you talk about the >>>>>> downstream kernel, I suppose you mean we should change this in the FW DT blob >>>>>> and in the downstream kernel. That would work for me. >>>>>> >>>>>> Did I understand you correctly? >>>>> Yes >>>>> >>>>> So i suggest to add the upstream compatibles into the repo mentioned above. >>>>> >>>>> Sorry, but in case you decided as a U-Boot developer to be compatible >>>>> with a unreviewed DT, we also need to make U-Boot compatible with >>>>> upstream and downstream DT blobs. >>>>> >>>> Well RPi3 is working with the DT blob provided by the FW, as I mentioned earlier >>>> if we can use this DTB we can work towards one binary that can boot both RPi3 >>>> and RPi4. On the other hand we can rely on the FW to detect the amount of memory >>>> our RPi4 has. >>>> >>>> That said, I agree that we should make sure that U-Boot can boot with both DTBs, >>>> the upstream one and the downstream. Now the question is how to get to this. I'm >>>> a bit puzzled that by talking about "unreviewed DT" you insinuate that bcm2711 >>>> compatible is already reviewed and can't be changed. From what I can see none of >>>> these compatibles got merged for now, so we are still at time to change them. >>> Stephen Boyd was okay with clk changes except of a small nit. So i fixed >>> this is as he suggested in a separate series. Unfortunately this hasn't >>> be applied yet [1]. >>> >>> The i2c, pinctrl and the sdhci changes has been applied yet. >>> >>> In my opinion it isn't the job of the mainline kernel to adapt to a >>> vendor device tree. It's the vendor device tree which needs to be fixed. >>> >> I agree with that. But if we can make this easier by choosing a compatible which >> fits downstream without violating upstream and it makes sense with the naming >> scheme of the RPi, I think that's a good argument. > > i spend a lot of my spare time to prepare these patch series in order to > get a clean solution. > > Either mixing bcm2711/bcm2838 or changing everything to bcm2838 in the > upstream tree has the following drawbacks: > > - additional review time and delay of the Raspberry Pi 4 support > - harder to understand for developer/reviewer without RPi knowledge On the other hand it get's confusing that the SoC for RPi4 is called bcm2711 while all the others are named bcm283x. Anyway if the majority prefers bcm2711 so shall it be and let's get forward instead :) > > Btw currently u-boot only uses bcm2711, so it would be nice to keep that. > Yes that's true. We already identified the compatible we'll need to add to U-Boot to also boot with the upstream DTS. I'll send a patch to the U-Boot mailinglist. > So my suggestion is to add bcm2711 compatibles in the downstream tree. > Ok, can you take care of it, or shall I send a pull request/open a bug? Regards, Matthias > Best regards > Stefan > >> >>> Sorry, but this is my holiday. I will back after the weekend. >>> >> Sure, enjoy. I'll be on travel for the next two weeks but will try to keep up >> with emails. >> >> Regards, >> Matthias >> >>> Best regards >>> Stefan >>> >>> [1] - https://www.spinics.net/lists/linux-clk/msg40534.html >>> >>>> Apart from the point Florian made, to stay consistent with the RPi SoC naming, >>>> it will save us work, both in the kernel and in U-Boot, as we would need to add >>>> both compatibles to the code-base. >>>> >>>> Regards, >>>> Matthias >>>> >>>>>>>> Regards, >>>>>>>> Matthias >>>>>>>> >>>>>>>>> Regards, >>>>>>>>> Matthias >>>>>>>>> >>>>>>>>>> Are there any config.txt tweaks necessary? >>>>>>>>>> >>>>>>>>>> >>>>>>>>> _______________________________________________ >>>>>>>>> linux-arm-kernel mailing list >>>>>>>>> linux-arm-kernel@lists.infradead.org >>>>>>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >>>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> linux-arm-kernel mailing list >>>>>>>> linux-arm-kernel@lists.infradead.org >>>>>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel