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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 49048C4167B for ; Thu, 3 Dec 2020 15:46:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E96DE207A0 for ; Thu, 3 Dec 2020 15:46:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730692AbgLCPqO (ORCPT ); Thu, 3 Dec 2020 10:46:14 -0500 Received: from foss.arm.com ([217.140.110.172]:43654 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726112AbgLCPqN (ORCPT ); Thu, 3 Dec 2020 10:46:13 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5B7951063; Thu, 3 Dec 2020 07:45:27 -0800 (PST) Received: from [192.168.2.22] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C1CA73F718; Thu, 3 Dec 2020 07:45:25 -0800 (PST) Subject: Re: [linux-sunxi] Re: [PATCH 7/8] arm64: dts: allwinner: Add Allwinner H616 .dtsi file To: Chen-Yu Tsai Cc: Samuel Holland , Maxime Ripard , Jernej Skrabec , devicetree , Linus Walleij , linux-kernel , linux-sunxi , Rob Herring , Icenowy Zheng , Yangtao Li , linux-arm-kernel References: <20201202135409.13683-1-andre.przywara@arm.com> <20201202135409.13683-8-andre.przywara@arm.com> <3b4f4bf6-2fba-5d35-bdf5-74b8ced10357@sholland.org> <34e5618e-4a3d-9a46-5077-179c82592fce@arm.com> From: =?UTF-8?Q?Andr=c3=a9_Przywara?= Autocrypt: addr=andre.przywara@arm.com; prefer-encrypt=mutual; keydata= xsFNBFNPCKMBEAC+6GVcuP9ri8r+gg2fHZDedOmFRZPtcrMMF2Cx6KrTUT0YEISsqPoJTKld tPfEG0KnRL9CWvftyHseWTnU2Gi7hKNwhRkC0oBL5Er2hhNpoi8x4VcsxQ6bHG5/dA7ctvL6 kYvKAZw4X2Y3GTbAZIOLf+leNPiF9175S8pvqMPi0qu67RWZD5H/uT/TfLpvmmOlRzNiXMBm kGvewkBpL3R2clHquv7pB6KLoY3uvjFhZfEedqSqTwBVu/JVZZO7tvYCJPfyY5JG9+BjPmr+ REe2gS6w/4DJ4D8oMWKoY3r6ZpHx3YS2hWZFUYiCYovPxfj5+bOr78sg3JleEd0OB0yYtzTT esiNlQpCo0oOevwHR+jUiaZevM4xCyt23L2G+euzdRsUZcK/M6qYf41Dy6Afqa+PxgMEiDto ITEH3Dv+zfzwdeqCuNU0VOGrQZs/vrKOUmU/QDlYL7G8OIg5Ekheq4N+Ay+3EYCROXkstQnf YYxRn5F1oeVeqoh1LgGH7YN9H9LeIajwBD8OgiZDVsmb67DdF6EQtklH0ycBcVodG1zTCfqM AavYMfhldNMBg4vaLh0cJ/3ZXZNIyDlV372GmxSJJiidxDm7E1PkgdfCnHk+pD8YeITmSNyb 7qeU08Hqqh4ui8SSeUp7+yie9zBhJB5vVBJoO5D0MikZAODIDwARAQABzS1BbmRyZSBQcnp5 d2FyYSAoQVJNKSA8YW5kcmUucHJ6eXdhcmFAYXJtLmNvbT7CwXsEEwECACUCGwMGCwkIBwMC BhUIAgkKCwQWAgMBAh4BAheABQJTWSV8AhkBAAoJEAL1yD+ydue63REP/1tPqTo/f6StS00g NTUpjgVqxgsPWYWwSLkgkaUZn2z9Edv86BLpqTY8OBQZ19EUwfNehcnvR+Olw+7wxNnatyxo D2FG0paTia1SjxaJ8Nx3e85jy6l7N2AQrTCFCtFN9lp8Pc0LVBpSbjmP+Peh5Mi7gtCBNkpz KShEaJE25a/+rnIrIXzJHrsbC2GwcssAF3bd03iU41J1gMTalB6HCtQUwgqSsbG8MsR/IwHW XruOnVp0GQRJwlw07e9T3PKTLj3LWsAPe0LHm5W1Q+euoCLsZfYwr7phQ19HAxSCu8hzp43u zSw0+sEQsO+9wz2nGDgQCGepCcJR1lygVn2zwRTQKbq7Hjs+IWZ0gN2nDajScuR1RsxTE4WR lj0+Ne6VrAmPiW6QqRhliDO+e82riI75ywSWrJb9TQw0+UkIQ2DlNr0u0TwCUTcQNN6aKnru ouVt3qoRlcD5MuRhLH+ttAcmNITMg7GQ6RQajWrSKuKFrt6iuDbjgO2cnaTrLbNBBKPTG4oF D6kX8Zea0KvVBagBsaC1CDTDQQMxYBPDBSlqYCb/b2x7KHTvTAHUBSsBRL6MKz8wwruDodTM 4E4ToV9URl4aE/msBZ4GLTtEmUHBh4/AYwk6ACYByYKyx5r3PDG0iHnJ8bV0OeyQ9ujfgBBP B2t4oASNnIOeGEEcQ2rjzsFNBFNPCKMBEACm7Xqafb1Dp1nDl06aw/3O9ixWsGMv1Uhfd2B6 it6wh1HDCn9HpekgouR2HLMvdd3Y//GG89irEasjzENZPsK82PS0bvkxxIHRFm0pikF4ljIb 6tca2sxFr/H7CCtWYZjZzPgnOPtnagN0qVVyEM7L5f7KjGb1/o5EDkVR2SVSSjrlmNdTL2Rd zaPqrBoxuR/y/n856deWqS1ZssOpqwKhxT1IVlF6S47CjFJ3+fiHNjkljLfxzDyQXwXCNoZn BKcW9PvAMf6W1DGASoXtsMg4HHzZ5fW+vnjzvWiC4pXrcP7Ivfxx5pB+nGiOfOY+/VSUlW/9 GdzPlOIc1bGyKc6tGREH5lErmeoJZ5k7E9cMJx+xzuDItvnZbf6RuH5fg3QsljQy8jLlr4S6 8YwxlObySJ5K+suPRzZOG2+kq77RJVqAgZXp3Zdvdaov4a5J3H8pxzjj0yZ2JZlndM4X7Msr P5tfxy1WvV4Km6QeFAsjcF5gM+wWl+mf2qrlp3dRwniG1vkLsnQugQ4oNUrx0ahwOSm9p6kM CIiTITo+W7O9KEE9XCb4vV0ejmLlgdDV8ASVUekeTJkmRIBnz0fa4pa1vbtZoi6/LlIdAEEt PY6p3hgkLLtr2GRodOW/Y3vPRd9+rJHq/tLIfwc58ZhQKmRcgrhtlnuTGTmyUqGSiMNfpwAR AQABwsFfBBgBAgAJBQJTTwijAhsMAAoJEAL1yD+ydue64BgP/33QKczgAvSdj9XTC14wZCGE U8ygZwkkyNf021iNMj+o0dpLU48PIhHIMTXlM2aiiZlPWgKVlDRjlYuc9EZqGgbOOuR/pNYA JX9vaqszyE34JzXBL9DBKUuAui8z8GcxRcz49/xtzzP0kH3OQbBIqZWuMRxKEpRptRT0wzBL O31ygf4FRxs68jvPCuZjTGKELIo656/Hmk17cmjoBAJK7JHfqdGkDXk5tneeHCkB411p9WJU vMO2EqsHjobjuFm89hI0pSxlUoiTL0Nuk9Edemjw70W4anGNyaQtBq+qu1RdjUPBvoJec7y/ EXJtoGxq9Y+tmm22xwApSiIOyMwUi9A1iLjQLmngLeUdsHyrEWTbEYHd2sAM2sqKoZRyBDSv ejRvZD6zwkY/9nRqXt02H1quVOP42xlkwOQU6gxm93o/bxd7S5tEA359Sli5gZRaucpNQkwd KLQdCvFdksD270r4jU/rwR2R/Ubi+txfy0dk2wGBjl1xpSf0Lbl/KMR5TQntELfLR4etizLq Xpd2byn96Ivi8C8u9zJruXTueHH8vt7gJ1oax3yKRGU5o2eipCRiKZ0s/T7fvkdq+8beg9ku fDO4SAgJMIl6H5awliCY2zQvLHysS/Wb8QuB09hmhLZ4AifdHyF1J5qeePEhgTA+BaUbiUZf i4aIXCH3Wv6K Organization: ARM Ltd. Message-ID: <3dc67c21-f649-cca5-ec54-c639c54ee56a@arm.com> Date: Thu, 3 Dec 2020 15:44:58 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/12/2020 15:02, Chen-Yu Tsai wrote: > On Thu, Dec 3, 2020 at 6:54 PM André Przywara wrote: >> >> On 03/12/2020 03:16, Samuel Holland wrote: >> >> Hi, >> >>> On 12/2/20 7:54 AM, Andre Przywara wrote: >>> ... >>>> + soc { >>>> + compatible = "simple-bus"; >>>> + #address-cells = <1>; >>>> + #size-cells = <1>; >>>> + ranges = <0x0 0x0 0x0 0x40000000>; >>>> + >>>> + syscon: syscon@3000000 { >>>> + compatible = "allwinner,sun50i-h616-system-control", >>>> + "allwinner,sun50i-a64-system-control"; >>>> + reg = <0x03000000 0x1000>; >>>> + #address-cells = <1>; >>>> + #size-cells = <1>; >>>> + ranges; >>>> + >>>> + sram_c: sram@28000 { >>>> + compatible = "mmio-sram"; >>>> + reg = <0x00028000 0x30000>; >>>> + #address-cells = <1>; >>>> + #size-cells = <1>; >>>> + ranges = <0 0x00028000 0x30000>; >>>> + }; >>>> + >>>> + sram_c1: sram@1a00000 { >>>> + compatible = "mmio-sram"; >>>> + reg = <0x01a00000 0x200000>; >>>> + #address-cells = <1>; >>>> + #size-cells = <1>; >>>> + ranges = <0 0x01a00000 0x200000>; >>>> + >>>> + ve_sram: sram-section@0 { >>>> + compatible = "allwinner,sun50i-h616-sram-c1", >>>> + "allwinner,sun4i-a10-sram-c1"; >>>> + reg = <0x000000 0x200000>; >>>> + }; >>>> + }; >>>> + }; >>> >>> You mentioned that you could not find a SRAM A2. How were these SRAM ranges >>> verified? If you can load eGON.BT0 larger than 32 KiB, then presumably NBROM >>> uses SRAM C, and it is in the manual, but I see no mention of SRAM C1. >> >> The manual says that SRAM C *can* be used by "the system", at boot time, >> as long as it's configured correctly. I couldn't find any details on how >> to switch clock sources for SRAM C, and the manual stanza on this is >> quite gibberish. I presume it's configured either by BROM or by reset >> default this way. I think the idea is that the later users (VE, DE) take >> ownership at some point (which means we can't run any firmware in there). >> The BSP boot0 is 48KB already, so reaching into SRAM C, and the code >> itself heavily uses SRAM C (found by hacking boot0 to drop to FEL and >> inspecting the memory afterwards). >> >> For C1: I copied this name from the H6 .dtsi, the manual calls this >> "VE-SRAM", in both manuals, and the description looks identical there >> for both SoCs. I think this will be later used by the video engine, so I >> kept it in. The large size made me suspicious, and from former >> experiments it looks like being aliased to (parts of) SRAM C. > > I would just call it sram_ve or ve_sram. SRAM C1 would make more sense if > it were part of SRAM C, not the other way around. But isn't that what we do? "sram_c1" is just the node name alias used for the parent node. That is actually never referenced anywhere (in any of the the H6 .dts), so we can actually remove it, I guess. The actual SRAM section is called ve_sram already. And I can't change the compatible name, for the fallback, at least. I can make the new compatible string read "allwinner,sun50i-h616-ve-sram", if that helps, but that would mean deviating from the H6 and other SoCs. Cheers, Andre > > Also the sram-section node would make more sense if it were in sram_c, as > that is the part that gets switched around, not the full region @ 1a00000. > > ChenYu > >> Maybe some guys with more VE knowledge can shine some light on this? >> >> Cheers, >> Andre >> 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=-6.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 E86F2C433FE for ; Thu, 3 Dec 2020 15:47:08 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7D284205CB for ; 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Message-ID: <3dc67c21-f649-cca5-ec54-c639c54ee56a@arm.com> Date: Thu, 3 Dec 2020 15:44:58 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201203_104530_530784_31205946 X-CRM114-Status: GOOD ( 24.05 ) 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: devicetree , Jernej Skrabec , Samuel Holland , Linus Walleij , linux-kernel , Maxime Ripard , linux-sunxi , Rob Herring , Icenowy Zheng , Yangtao Li , linux-arm-kernel 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 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