From patchwork Wed Apr 27 23:36:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 566859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD3F7C433F5 for ; Wed, 27 Apr 2022 23:36:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229447AbiD0Xjc (ORCPT ); Wed, 27 Apr 2022 19:39:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33390 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbiD0Xjc (ORCPT ); Wed, 27 Apr 2022 19:39:32 -0400 Received: from hall.aurel32.net (hall.aurel32.net [IPv6:2001:bc8:30d7:100::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C31A13FD8B for ; Wed, 27 Apr 2022 16:36:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=aurel32.net ; s=202004.hall; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Content-Type:From:Reply-To: Subject:Content-ID:Content-Description:X-Debbugs-Cc; bh=rtzKHvK52/YyI9iOUl+5leZ5LnRvydEZvetZFryYg2U=; b=Zx+O39PPyuUBhiteC14mio57+7 nOMjcMHAFS1hEvfY4kGaYQfrIuPkToHKgWsn6Fo0Ikhw4PZTSvElgHFaIQX9nMxMV/08cIcKmTuDR GZzs/KI8QJ+fAZKglFnhC4sKvlkvN9hQZmyGkpT/ifbwtX8mlk5AHuR2LdE6Ln+pIeWxhJfnSTxyr CH+1H+q+nEwsR/2tC6juNIwL4NeV6KVRoS8f9122iVQhDokWs/o+BQWEQ5sbAMMG1DBbfqI6jGzp7 O4bY6I904nUiaCgfKffuyCt+gUF+T0hmCUmn0korLJscXd0vSsyRFnfW8KEfJ6743551GgIxWiRZF eM9W1CaA==; Received: from [2a01:e34:ec5d:a741:8a4c:7c4e:dc4c:1787] (helo=ohm.rr44.fr) by hall.aurel32.net with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1njrCe-006YNU-Ea; Thu, 28 Apr 2022 01:36:12 +0200 Received: from aurel32 by ohm.rr44.fr with local (Exim 4.95) (envelope-from ) id 1njrCd-0058nI-4A; Thu, 28 Apr 2022 01:36:11 +0200 From: Aurelien Jarno To: Arnd Bergmann , Krzysztof Kozlowski , Olof Johansson , Rob Herring , bcm-kernel-feedback-list@broadcom.com Cc: Stefan Wahren , Nicolas Saenz Julienne , Linus Walleij , devicetree@vger.kernel.org, Phil Elwell , linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, soc@kernel.org, Aurelien Jarno Subject: [PATCH RESEND 2/2] arm: dts: Enable device-tree overlay support for RPi devices Date: Thu, 28 Apr 2022 01:36:07 +0200 Message-Id: <20220427233607.1225419-3-aurelien@aurel32.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220427233607.1225419-1-aurelien@aurel32.net> References: <20220427233607.1225419-1-aurelien@aurel32.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add the '-@' DTC option for the Raspberry Pi devices. This option populates the '__symbols__' node that contains all the necessary symbols for supporting device-tree overlays (for instance from the firmware or the bootloader) on these devices. The Rasbperry Pi devices are well known for their GPIO header, that allow various "HATs" or other modules do be connected and this enables users to create out-of-tree device-tree overlays for these modules. Please note that this change does increase the size of the resulting DTB by ~40%. For example, with v5.17 increase in size is as follows: bcm2711-rpi-400.dtb 26481 -> 36830 bytes bcm2711-rpi-4-b.dtb 26537 -> 36886 bytes bcm2711-rpi-cm4-io.dtb 26426 -> 36945 bytes bcm2835-rpi-a.dtb 12641 -> 17852 bytes bcm2835-rpi-a-plus.dtb 12765 -> 17976 bytes bcm2835-rpi-b.dtb 12763 -> 17998 bytes bcm2835-rpi-b-plus.dtb 12979 -> 18263 bytes bcm2835-rpi-b-rev2.dtb 12847 -> 18131 bytes bcm2835-rpi-cm1-io1.dtb 12839 -> 18113 bytes bcm2835-rpi-zero.dtb 12681 -> 17924 bytes bcm2835-rpi-zero-w.dtb 13135 -> 18430 bytes bcm2836-rpi-2-b.dtb 13687 -> 19255 bytes bcm2837-rpi-3-a-plus.dtb 14133 -> 19740 bytes bcm2837-rpi-3-b.dtb 14310 -> 20006 bytes bcm2837-rpi-3-b-plus.dtb 14670 -> 20474 bytes bcm2837-rpi-cm3-io3.dtb 13680 -> 19266 bytes Signed-off-by: Aurelien Jarno --- arch/arm/boot/dts/Makefile | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index 7c16f8a2b738..85644149de44 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -81,6 +81,24 @@ dtb-$(CONFIG_SOC_SAMA7G5) += \ at91-sama7g5ek.dtb dtb-$(CONFIG_ARCH_AXXIA) += \ axm5516-amarillo.dtb +# Enables support for device-tree overlays +DTC_FLAGS_bcm2835-rpi-b := -@ +DTC_FLAGS_bcm2835-rpi-a := -@ +DTC_FLAGS_bcm2835-rpi-b-rev2 := -@ +DTC_FLAGS_bcm2835-rpi-b-plus := -@ +DTC_FLAGS_bcm2835-rpi-a-plus := -@ +DTC_FLAGS_bcm2835-rpi-cm1-io1 := -@ +DTC_FLAGS_bcm2836-rpi-2-b := -@ +DTC_FLAGS_bcm2837-rpi-3-a-plus := -@ +DTC_FLAGS_bcm2837-rpi-3-b := -@ +DTC_FLAGS_bcm2837-rpi-3-b-plus := -@ +DTC_FLAGS_bcm2837-rpi-cm3-io3 := -@ +DTC_FLAGS_bcm2837-rpi-zero-2-w := -@ +DTC_FLAGS_bcm2711-rpi-400 := -@ +DTC_FLAGS_bcm2711-rpi-4-b := -@ +DTC_FLAGS_bcm2711-rpi-cm4-io := -@ +DTC_FLAGS_bcm2835-rpi-zero := -@ +DTC_FLAGS_bcm2835-rpi-zero-w := -@ dtb-$(CONFIG_ARCH_BCM2835) += \ bcm2835-rpi-b.dtb \ bcm2835-rpi-a.dtb \