From owner-freebsd-arm@freebsd.org Mon Aug 20 15:11:54 2018 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B51521071989 for ; Mon, 20 Aug 2018 15:11:54 +0000 (UTC) (envelope-from manu@bidouilliste.com) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 3B6E471FEA for ; Mon, 20 Aug 2018 15:11:54 +0000 (UTC) (envelope-from manu@bidouilliste.com) Received: by mailman.ysv.freebsd.org (Postfix) id 00F691071985; Mon, 20 Aug 2018 15:11:54 +0000 (UTC) Delivered-To: arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D354F1071984 for ; Mon, 20 Aug 2018 15:11:53 +0000 (UTC) (envelope-from manu@bidouilliste.com) Received: from mail.blih.net (mail.blih.net [212.83.177.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.blih.net", Issuer "mail.blih.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 3D44171FC0 for ; Mon, 20 Aug 2018 15:11:52 +0000 (UTC) (envelope-from manu@bidouilliste.com) Received: from mail.blih.net (mail.blih.net [212.83.177.182]) by mail.blih.net (OpenSMTPD) with ESMTP id e81094bf for ; Mon, 20 Aug 2018 17:11:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=bidouilliste.com; h=date :from:to:subject:message-id:mime-version:content-type :content-transfer-encoding; s=mail; bh=UfS0/8D1K7Oy2zKkSvuH+9XpS Cc=; b=bGk0gX952nC/aaxEafLlkJTj381qIB4sO0DSEl4vzA4+smK/ms7sWiTw3 CfrssgNW2ww2MpFXgWst4uGBIfH0UXSWtkNTW5MEBnxbVugajItM9xk5DUcdp0RY lYlLufZmtKDR5bMeIs0hKRNNPZS1GgGM5kfUhNtCiSWObrWlTk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=bidouilliste.com; h=date :from:to:subject:message-id:mime-version:content-type :content-transfer-encoding; q=dns; s=mail; b=hwVW9klgTmAq5pUY6+k gDA2RvS4gw6s8xrJCzkWwM5MrV2UX2kYiVxkROFyBvvVlU+3WMFQykNR0EMo2Dy2 j5CGX7Q/x/q0LbZsmjBOoaxd5GRF9VabpGnPClcrXqU7BL78+FsbA/l11xj4udfZ 7v/+OUDhAwH2MZTCWZMz7GE8= Received: from skull.home.blih.net (ip-9.net-89-3-105.rev.numericable.fr [89.3.105.9]) by mail.blih.net (OpenSMTPD) with ESMTPSA id 95f01c3e TLS version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO for ; Mon, 20 Aug 2018 17:11:51 +0200 (CEST) Date: Mon, 20 Aug 2018 17:11:50 +0200 From: Emmanuel Vadot To: "freebsd-arm@freebsd.org" Subject: Importing DTS for arm64 Message-Id: <20180820171150.cc8e08114a1d9553da6056f9@bidouilliste.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; amd64-portbld-freebsd12.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Aug 2018 15:11:54 -0000 Hello arm@ I would like to import the DTS for arm64 in the tree and use them like we do for the arm ones. We currently rely on the bootloader/firmware to give us a DTB to work with, this works nicely until it doesn't. Here is why I want to import the DTS : - Most of the boards are using U-Boot, u-boot embed a DTB that isn't compiled with -@ (overlay ready) so we cannot use overlays. We want overlays, overlays are nice. - The DTS life is going to linux, then sometimes it's imported in U-Boot but it depend on the SoC family, U-Boot doesn't batch import every DTS like we do. So sometimes to U-Boot DTS are very old. Or when an interesting patch in commited upstream it is in Linux X+2 (roughly 4 months from now), we then have to wait for U-Boot to catch up, that give us between 4 and 6 months to have an update. - Some boards like the Marvell ones have 3 DTS, the one in the vendor U-Boot made by Marvell themselves, the one in u-boot mainline and the one in Linux. I found that the DTS in the Marvell U-Boot have some problem with FreeBSD (especially the macchiatobin that declare node with the same address but not the same size, that is not something that the rman code can handle, it could be modified, I don't know the code well enough). Also some compatible are used when they shouldn't, for example they declare the gpio being orion-gpio while this binding requires interrupts supports, which the node doesn't have. - The above situation is mostly the same with RockChip SoCs (possibly others, those are the only SoCs I work on that have this problem). Note that importing the DTS doesn't mean that every board will use them, I don't intend to copy the DTB to the GENERIC memstick image for the Overdrive 1000/3000 for example, the ones provided by the firmware works fine. RPI3 will still stay an exception as we use the DTB provided by the rpi-firmware package, so they come from the rpi foundation linux fork. I would love to do that for 12 even if we are approching code freeze, this will allow FreeBSD 12 to be more than awesome on arm64. Cheers, -- Emmanuel Vadot