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 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0E552C4332F for ; Sun, 10 Apr 2022 23:00:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) id E4A47C385A4; Sun, 10 Apr 2022 23:00:38 +0000 (UTC) Received: from hall.aurel32.net (hall.aurel32.net [195.154.113.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.kernel.org (Postfix) with ESMTPS id 8EF56C385AA; Sun, 10 Apr 2022 23:00:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.kernel.org 8EF56C385AA Authentication-Results: smtp.kernel.org; dmarc=none (p=none dis=none) header.from=aurel32.net Authentication-Results: smtp.kernel.org; spf=none smtp.mailfrom=aurel32.net 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=qWl2Mn2dgNw5/xL1kBPYx11jQuGzlGIXV7NZL9/oICM=; b=UL9lELEKVxByJLvZhjCsj39PtB yW1RyKZtT4AQBKso9lya4nFexHKr92ehuRDpdqU8pr87ZjhRE2Rbpn0+c2swJ9mPPOgvcwLEOTlvt EHqVgEfnwYXajyhWMoMJY0L9+nKIUXvq1vh5qNDgXsQc/MZZPXvkbo6C92l0vPm577Rc2nIr8tQoi X3WMFE3gEL+oxxvj306blQGjD+XVm0n+WDCcap0ahxG/J1m6Ik0Uj+ui8/fZcHRBIFyzOtxi3NK1W etsaEKvYRF3MfxO9KSQ5uKj4wG9QU4zGChZk3x0z8nHiuB/piK+rns+Vbr4O4mNm5ETt9C9CAmoLW TIwOLWTQ==; 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 1ndgXe-00BKdE-Pr; Mon, 11 Apr 2022 01:00:22 +0200 Received: from aurel32 by ohm.rr44.fr with local (Exim 4.95) (envelope-from ) id 1ndgXe-000ZMn-3l; Mon, 11 Apr 2022 01:00:22 +0200 From: Aurelien Jarno To: linux-kernel@vger.kernel.org List-Id: Cc: Aurelien Jarno , Arnd Bergmann , Krzysztof Kozlowski , Olof Johansson , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, soc@kernel.org Subject: [PATCH 2/2] arm: dts: Enable device-tree overlay support for RPi devices Date: Mon, 11 Apr 2022 00:59:40 +0200 Message-Id: <20220410225940.135744-3-aurelien@aurel32.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220410225940.135744-1-aurelien@aurel32.net> References: <20220410225940.135744-1-aurelien@aurel32.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 \ -- 2.34.1