From patchwork Fri Dec 18 15:43:18 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: 11982527 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 EB51DC4361B for ; Fri, 18 Dec 2020 17:04:19 +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 6BF6723B2F for ; Fri, 18 Dec 2020 17:04:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6BF6723B2F 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=Btwj/KIp/AdN7m1KLUahhbeUH7/l1/3Yh+CJnVwTh+Q=; b=bl4RWJNjo4U9sjdIQezwlB5n2 Tfan9Fveuype05HKZARzfkXBb4NVMIctgqsRL4Qkb49ACuIsPLO/d/YI2bWToRk512kVKVXiaOkOG 0Kba7SPIWDMi6CaXo4wKMXwOQYSMYZBNrRNfTS6AJQft/F49KL7pCdKzajrA2nc7XhWC6+I/RWM45 Qn6w2wPsoS7fv7YTXCIRwXWOH0mTsEDQB7d5Ipa9c3ADddBkhOzLYwarYH0YINYlJXtfKFI0bGh+m kdMyEsfjDM/nWIlNQiVZ0SgY4dgDY4y2GtOLQEyoqH9HpD4qChafEfDmvwhRRGiLll5a//7S8xcj+ ZIDXGgx5g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kqJ3C-0000tN-59; Fri, 18 Dec 2020 16:56:27 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kqIz7-0000Kp-H5; Fri, 18 Dec 2020 16:52:15 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=wTZluy6HRRChWkin6/iTDF98JX8hAUk6FEoUShNC1mg=; b=MHgjWf2llqOR+3FLPzkm6kAlUv rEDD/fFkRuVX+JL/AffdynjP68MWi1UjfNsg0MtPFEPjZOXlgR1by++LUoLnSPVRlJ1geBG2Zi+1k DcZfWuNNO4N1OyKQ/biicHc8dndGmWkrRm0zz4KFSry7YJggOZFmEs3QdPStjRyG2JcLOqPM7HcMS UmrF60dMztd9BvfP1HbeNYVwkXOcySaObceCUoujNRue8Vj6u0jOtDWNy2wCslV12Et/Otp563zeW ByegtdbggzFqbUiAETmvFBzSVNYtw/D/dv/s+6ONKqGfMT7/hTTzsMGgwSBinPSlQXsLVEcbBqsPU iVKa+0jQ==; Received: from mx2.suse.de ([195.135.220.15]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kqHut-00024G-OG; Fri, 18 Dec 2020 15:43:45 +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 4C86AADE1; Fri, 18 Dec 2020 15:43:38 +0000 (UTC) From: Nicolas Saenz Julienne To: srinivas.kandagatla@linaro.org, linux-kernel@vger.kernel.org, Rob Herring , Nicolas Saenz Julienne Subject: [PATCH v2 3/5] ARM: dts: bcm2711: Add reserved memory template to hold firmware configuration Date: Fri, 18 Dec 2020 16:43:18 +0100 Message-Id: <20201218154320.28368-4-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201218154320.28368-1-nsaenzjulienne@suse.de> References: <20201218154320.28368-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201218_154339_958057_5F9B2115 X-CRM114-Status: GOOD ( 10.83 ) 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@vger.kernel.org, tim.gover@raspberrypi.com, catalin.marinas@arm.com, linux@armlinux.org.uk, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, will@kernel.org, phil@raspberrypi.com, linux-arm-kernel@lists.infradead.org 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[1] configuration into memory for the OS to consume. Specifically, for the bootloader configuration and upgrade user-space routines to query it through nvmem's sysfs interface. 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 and to expose it as an nvmem device. Signed-off-by: Nicolas Saenz Julienne [1] https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md --- Changes since v1: - Introduce compatible string - Change alias name to something more explicit arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 17 +++++++++++++++++ 1 file changed, 17 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..3b4ab947492a 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; + blconfig = &blconfig; }; leds { @@ -218,6 +219,22 @@ &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. + */ + blconfig: nvram@0 { + compatible = "raspberrypi,bootloader-config", "nvmem-rmem"; + #address-cells = <1>; + #size-cells = <1>; + reg = <0x0 0x0 0x0>; + no-map; + status = "disabled"; + }; +}; + /* SDHCI is used to control the SDIO for wireless */ &sdhci { #address-cells = <1>;