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Fri, 06 Aug 2021 05:48:14 -0700 (PDT) Received: from [192.168.8.102] ([86.32.42.198]) by smtp.gmail.com with ESMTPSA id lw22sm2849189ejb.74.2021.08.06.05.48.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 Aug 2021 05:48:13 -0700 (PDT) Subject: Re: [PATCH 12/12] arm64: dts: exynos: Add Exynos850 SoC support From: Krzysztof Kozlowski To: Sam Protsenko , =?UTF-8?Q?Pawe=c5=82_Chmiel?= Cc: Sylwester Nawrocki , Chanwoo Choi , Linus Walleij , Tomasz Figa , Rob Herring , Stephen Boyd , Michael Turquette , Jiri Slaby , Greg Kroah-Hartman , Charles Keepax , Ryu Euiyoul , Tom Gall , Sumit Semwal , John Stultz , Amit Pundir , devicetree , linux-arm Mailing List , linux-clk , "open list:GPIO SUBSYSTEM" , Linux Kernel Mailing List , Linux Samsung SOC , "open list:SERIAL DRIVERS" References: <20210730144922.29111-1-semen.protsenko@linaro.org> <20210730144922.29111-13-semen.protsenko@linaro.org> <455cfb5e-dff7-a5c0-3875-49abe3e900f3@canonical.com> <68734f6c-fc76-595c-8d34-8924dbbbb845@canonical.com> Message-ID: Date: Fri, 6 Aug 2021 14:48:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On 06/08/2021 14:32, Krzysztof Kozlowski wrote: > On 06/08/2021 14:07, Sam Protsenko wrote: >> On Fri, 6 Aug 2021 at 10:49, Krzysztof Kozlowski >> wrote: >>> >>> On 06/08/2021 01:06, Sam Protsenko wrote: >>>> On Sat, 31 Jul 2021 at 12:03, Krzysztof Kozlowski >>>> wrote: >>>> >>>>>> >>>>>> This patch adds minimal SoC support. Particular board device tree files >>>>>> can include exynos850.dtsi file to get SoC related nodes, and then >>>>>> reference those nodes further as needed. >>>>>> >>>>>> Signed-off-by: Sam Protsenko >>>>>> --- >>>>>> .../boot/dts/exynos/exynos850-pinctrl.dtsi | 782 ++++++++++++++++++ >>>>>> arch/arm64/boot/dts/exynos/exynos850-usi.dtsi | 30 + >>>>>> arch/arm64/boot/dts/exynos/exynos850.dtsi | 245 ++++++ >>>>> >>>>> Not buildable. Missing Makefile, missing DTS. Please submit with initial >>>>> DTS, otherwise no one is able to verify it even compiles. >>>>> >>>> >>>> This device is not available for purchase yet. I'll send the patch for >>>> board dts once it's announced. I can do all the testing for now, if >>>> you have any specific requests. Would it be possible for us to review >>>> and apply only SoC support for now? Will send v2 soon... >>> >>> What you propose is equal to adding a driver (C source code) without >>> ability to compile it. What's the point of having it in the kernel? It's >>> unverifiable, unbuildable and unusable. >>> >> >> Yes, I understand. That's adding code with no users, and it's not a >> good practice. >> >>> We can review the DTSI however merging has to be with a DTS. Usually the >>> SoC vendor adds first an evalkit (e.g. SMDK board). Maybe you have one >>> for Exynos850? Otherwise if you cannot disclose the actual board, the >>> DTSI will have to wait. You can submit drivers, though. >>> >> >> Sure, let's go this way. I'll send v2 soon. Improving patches and >> having Reviewed-by tag for those would good enough for me at this >> point. I'll continue to prepare another Exynos850 related patches >> until the actual board is announced, like proper clock driver, reset, >> MMC, etc. Is it ok if I send those for a review too (so I can fix all >> issues ahead)? > > Sure, prepare all necessary drivers earlier. I suspect clocks will be a > real pain because of significant changes modeled in vendor kernel. I > remember Paweł Chmiel (+Cc) was doing something for these: > https://github.com/PabloPL/linux/tree/exynos7420 > > I mentioned before - you should also modify the chipid driver. Check > also other drivers in drivers/soc/samsung, although some are needed only > for suspend&resume. > You can also take a look at Exynos8895 efforts: https://github.com/ivoszbg/linux/commits/for-upstream/exynos8895 Since knowledge, datasheets and efforts are quite spread all over, I keep track of some work here: https://exynos.wiki.kernel.org/community Best regards, Krzysztof From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-23.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E1D8C43214 for ; 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Fri, 06 Aug 2021 05:48:13 -0700 (PDT) Subject: Re: [PATCH 12/12] arm64: dts: exynos: Add Exynos850 SoC support From: Krzysztof Kozlowski To: Sam Protsenko , =?UTF-8?Q?Pawe=c5=82_Chmiel?= Cc: Sylwester Nawrocki , Chanwoo Choi , Linus Walleij , Tomasz Figa , Rob Herring , Stephen Boyd , Michael Turquette , Jiri Slaby , Greg Kroah-Hartman , Charles Keepax , Ryu Euiyoul , Tom Gall , Sumit Semwal , John Stultz , Amit Pundir , devicetree , linux-arm Mailing List , linux-clk , "open list:GPIO SUBSYSTEM" , Linux Kernel Mailing List , Linux Samsung SOC , "open list:SERIAL DRIVERS" References: <20210730144922.29111-1-semen.protsenko@linaro.org> <20210730144922.29111-13-semen.protsenko@linaro.org> <455cfb5e-dff7-a5c0-3875-49abe3e900f3@canonical.com> <68734f6c-fc76-595c-8d34-8924dbbbb845@canonical.com> Message-ID: Date: Fri, 6 Aug 2021 14:48:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 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-20210806_054816_974003_7D221897 X-CRM114-Status: GOOD ( 24.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMDYvMDgvMjAyMSAxNDozMiwgS3J6eXN6dG9mIEtvemxvd3NraSB3cm90ZToKPiBPbiAwNi8w OC8yMDIxIDE0OjA3LCBTYW0gUHJvdHNlbmtvIHdyb3RlOgo+PiBPbiBGcmksIDYgQXVnIDIwMjEg YXQgMTA6NDksIEtyenlzenRvZiBLb3psb3dza2kKPj4gPGtyenlzenRvZi5rb3psb3dza2lAY2Fu b25pY2FsLmNvbT4gd3JvdGU6Cj4+Pgo+Pj4gT24gMDYvMDgvMjAyMSAwMTowNiwgU2FtIFByb3Rz ZW5rbyB3cm90ZToKPj4+PiBPbiBTYXQsIDMxIEp1bCAyMDIxIGF0IDEyOjAzLCBLcnp5c3p0b2Yg S296bG93c2tpCj4+Pj4gPGtyenlzenRvZi5rb3psb3dza2lAY2Fub25pY2FsLmNvbT4gd3JvdGU6 Cj4+Pj4KPj4+Pj4+Cj4+Pj4+PiBUaGlzIHBhdGNoIGFkZHMgbWluaW1hbCBTb0Mgc3VwcG9ydC4g UGFydGljdWxhciBib2FyZCBkZXZpY2UgdHJlZSBmaWxlcwo+Pj4+Pj4gY2FuIGluY2x1ZGUgZXh5 bm9zODUwLmR0c2kgZmlsZSB0byBnZXQgU29DIHJlbGF0ZWQgbm9kZXMsIGFuZCB0aGVuCj4+Pj4+ PiByZWZlcmVuY2UgdGhvc2Ugbm9kZXMgZnVydGhlciBhcyBuZWVkZWQuCj4+Pj4+Pgo+Pj4+Pj4g U2lnbmVkLW9mZi1ieTogU2FtIFByb3RzZW5rbyA8c2VtZW4ucHJvdHNlbmtvQGxpbmFyby5vcmc+ Cj4+Pj4+PiAtLS0KPj4+Pj4+ICAuLi4vYm9vdC9kdHMvZXh5bm9zL2V4eW5vczg1MC1waW5jdHJs LmR0c2kgICAgfCA3ODIgKysrKysrKysrKysrKysrKysrCj4+Pj4+PiAgYXJjaC9hcm02NC9ib290 L2R0cy9leHlub3MvZXh5bm9zODUwLXVzaS5kdHNpIHwgIDMwICsKPj4+Pj4+ICBhcmNoL2FybTY0 L2Jvb3QvZHRzL2V4eW5vcy9leHlub3M4NTAuZHRzaSAgICAgfCAyNDUgKysrKysrCj4+Pj4+Cj4+ Pj4+IE5vdCBidWlsZGFibGUuIE1pc3NpbmcgTWFrZWZpbGUsIG1pc3NpbmcgRFRTLiBQbGVhc2Ug c3VibWl0IHdpdGggaW5pdGlhbAo+Pj4+PiBEVFMsIG90aGVyd2lzZSBubyBvbmUgaXMgYWJsZSB0 byB2ZXJpZnkgaXQgZXZlbiBjb21waWxlcy4KPj4+Pj4KPj4+Pgo+Pj4+IFRoaXMgZGV2aWNlIGlz IG5vdCBhdmFpbGFibGUgZm9yIHB1cmNoYXNlIHlldC4gSSdsbCBzZW5kIHRoZSBwYXRjaCBmb3IK Pj4+PiBib2FyZCBkdHMgb25jZSBpdCdzIGFubm91bmNlZC4gSSBjYW4gZG8gYWxsIHRoZSB0ZXN0 aW5nIGZvciBub3csIGlmCj4+Pj4geW91IGhhdmUgYW55IHNwZWNpZmljIHJlcXVlc3RzLiBXb3Vs ZCBpdCBiZSBwb3NzaWJsZSBmb3IgdXMgdG8gcmV2aWV3Cj4+Pj4gYW5kIGFwcGx5IG9ubHkgU29D IHN1cHBvcnQgZm9yIG5vdz8gV2lsbCBzZW5kIHYyIHNvb24uLi4KPj4+Cj4+PiBXaGF0IHlvdSBw cm9wb3NlIGlzIGVxdWFsIHRvIGFkZGluZyBhIGRyaXZlciAoQyBzb3VyY2UgY29kZSkgd2l0aG91 dAo+Pj4gYWJpbGl0eSB0byBjb21waWxlIGl0LiBXaGF0J3MgdGhlIHBvaW50IG9mIGhhdmluZyBp dCBpbiB0aGUga2VybmVsPyBJdCdzCj4+PiB1bnZlcmlmaWFibGUsIHVuYnVpbGRhYmxlIGFuZCB1 bnVzYWJsZS4KPj4+Cj4+Cj4+IFllcywgSSB1bmRlcnN0YW5kLiBUaGF0J3MgYWRkaW5nIGNvZGUg d2l0aCBubyB1c2VycywgYW5kIGl0J3Mgbm90IGEKPj4gZ29vZCBwcmFjdGljZS4KPj4KPj4+IFdl IGNhbiByZXZpZXcgdGhlIERUU0kgaG93ZXZlciBtZXJnaW5nIGhhcyB0byBiZSB3aXRoIGEgRFRT LiBVc3VhbGx5IHRoZQo+Pj4gU29DIHZlbmRvciBhZGRzIGZpcnN0IGFuIGV2YWxraXQgKGUuZy4g U01ESyBib2FyZCkuIE1heWJlIHlvdSBoYXZlIG9uZQo+Pj4gZm9yIEV4eW5vczg1MD8gT3RoZXJ3 aXNlIGlmIHlvdSBjYW5ub3QgZGlzY2xvc2UgdGhlIGFjdHVhbCBib2FyZCwgdGhlCj4+PiBEVFNJ IHdpbGwgaGF2ZSB0byB3YWl0LiBZb3UgY2FuIHN1Ym1pdCBkcml2ZXJzLCB0aG91Z2guCj4+Pgo+ Pgo+PiBTdXJlLCBsZXQncyBnbyB0aGlzIHdheS4gSSdsbCBzZW5kIHYyIHNvb24uIEltcHJvdmlu ZyBwYXRjaGVzIGFuZAo+PiBoYXZpbmcgUmV2aWV3ZWQtYnkgdGFnIGZvciB0aG9zZSB3b3VsZCBn b29kIGVub3VnaCBmb3IgbWUgYXQgdGhpcwo+PiBwb2ludC4gSSdsbCBjb250aW51ZSB0byBwcmVw YXJlIGFub3RoZXIgRXh5bm9zODUwIHJlbGF0ZWQgcGF0Y2hlcwo+PiB1bnRpbCB0aGUgYWN0dWFs IGJvYXJkIGlzIGFubm91bmNlZCwgbGlrZSBwcm9wZXIgY2xvY2sgZHJpdmVyLCByZXNldCwKPj4g TU1DLCBldGMuIElzIGl0IG9rIGlmIEkgc2VuZCB0aG9zZSBmb3IgYSByZXZpZXcgdG9vIChzbyBJ IGNhbiBmaXggYWxsCj4+IGlzc3VlcyBhaGVhZCk/Cj4gCj4gU3VyZSwgcHJlcGFyZSBhbGwgbmVj ZXNzYXJ5IGRyaXZlcnMgZWFybGllci4gSSBzdXNwZWN0IGNsb2NrcyB3aWxsIGJlIGEKPiByZWFs IHBhaW4gYmVjYXVzZSBvZiBzaWduaWZpY2FudCBjaGFuZ2VzIG1vZGVsZWQgaW4gdmVuZG9yIGtl cm5lbC4gSQo+IHJlbWVtYmVyIFBhd2XFgiBDaG1pZWwgKCtDYykgd2FzIGRvaW5nIHNvbWV0aGlu ZyBmb3IgdGhlc2U6Cj4gaHR0cHM6Ly9naXRodWIuY29tL1BhYmxvUEwvbGludXgvdHJlZS9leHlu b3M3NDIwCj4gCj4gSSBtZW50aW9uZWQgYmVmb3JlIC0geW91IHNob3VsZCBhbHNvIG1vZGlmeSB0 aGUgY2hpcGlkIGRyaXZlci4gQ2hlY2sKPiBhbHNvIG90aGVyIGRyaXZlcnMgaW4gZHJpdmVycy9z b2Mvc2Ftc3VuZywgYWx0aG91Z2ggc29tZSBhcmUgbmVlZGVkIG9ubHkKPiBmb3Igc3VzcGVuZCZy ZXN1bWUuCj4gCgpZb3UgY2FuIGFsc28gdGFrZSBhIGxvb2sgYXQgRXh5bm9zODg5NSBlZmZvcnRz OgpodHRwczovL2dpdGh1Yi5jb20vaXZvc3piZy9saW51eC9jb21taXRzL2Zvci11cHN0cmVhbS9l eHlub3M4ODk1CgpTaW5jZSBrbm93bGVkZ2UsIGRhdGFzaGVldHMgYW5kIGVmZm9ydHMgYXJlIHF1 aXRlIHNwcmVhZCBhbGwgb3ZlciwgSQprZWVwIHRyYWNrIG9mIHNvbWUgd29yayBoZXJlOgpodHRw czovL2V4eW5vcy53aWtpLmtlcm5lbC5vcmcvY29tbXVuaXR5CgoKQmVzdCByZWdhcmRzLApLcnp5 c3p0b2YKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxp bnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFk ZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4 LWFybS1rZXJuZWwK