From patchwork Tue Dec 15 15:56:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 11975083 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=-16.8 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,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 8B88CC4361B for ; Tue, 15 Dec 2020 15:58:18 +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 3B9AC224F4 for ; Tue, 15 Dec 2020 15:58:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3B9AC224F4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=FvUhq6Zxn9VibAJAGpaadoSqDPe9A+gNeFMn3bWAeJc=; b=WxeJPxavn1cLv7CmFh7ZHlb74 Dx/FNG+ckNtbSw8Xa8SKeERvx0eGEmU/irZv0RuwVmxgur5Aha9QUwBGkQfAiR6xJrf58USmo+nfL rjD2H8UoY68W99MDK6PduJT/FZwh/V4ydfCARRf+1dO/B7lcvpqoe1aQbCdEstDxQdkAtu4Yn/hr5 nZjC1/8fPmkwxWosYVP5v4b0WNG+GbMmcv9KnpDOHufcnhJ/SSGv8GiKLx5m/Ke4wc3EiJDHSTVdX mIlcTwBT93kW7K8RggV9QY+J9Cbmy5GlNrIO6SZ6vCckrbFAmxtwLNEhKpt1pf0u+GKntf3stk+qE a7HlahqpQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kpChG-0004dh-8S; Tue, 15 Dec 2020 15:57:06 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kpCgu-0004Wo-7D; Tue, 15 Dec 2020 15:56:45 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 2EB33AD43; Tue, 15 Dec 2020 15:56:43 +0000 (UTC) From: Nicolas Saenz Julienne To: srinivas.kandagatla@linaro.org, Saenz Julienne , devicetree@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Rob Herring Subject: [PATCH 3/6] ARM: dts: bcm2711: Add reserved memory template to hold firmware configuration Date: Tue, 15 Dec 2020 16:56:23 +0100 Message-Id: <20201215155627.2513-4-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201215155627.2513-1-nsaenzjulienne@suse.de> References: <20201215155627.2513-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201215_105644_433938_48077F66 X-CRM114-Status: GOOD ( 14.31 ) 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: tim.gover@raspberrypi.com, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux@armlinux.org.uk, will@kernel.org, phil@raspberrypi.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org RPi4's co-processor will copy the board's bootloader configuration into memory for the OS to consume. Introduce a reserved-memory area template for the co-processor to edit before booting the system so as for Linux not to overwrite that memory. Signed-off-by: Nicolas Saenz Julienne --- arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts index 403bacf986eb..c58e58e8ce39 100644 --- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts +++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts @@ -25,6 +25,7 @@ aliases { emmc2bus = &emmc2bus; ethernet0 = &genet; pcie0 = &pcie0; + eeprom = &eeprom; }; leds { @@ -218,6 +219,19 @@ &pwm1 { status = "okay"; }; +&rmem { + /* + * RPi4's co-processor will copy the board's bootloader configuration + * into memory for the OS to consume. It'll also update this node with + * its placement information. + */ + eeprom: eeprom@0 { + reg = <0x0 0x0 0x0>; + no-map; + status = "disabled"; + }; +}; + /* SDHCI is used to control the SDIO for wireless */ &sdhci { #address-cells = <1>;