[{"id":1764317,"web_url":"http://patchwork.ozlabs.org/comment/1764317/","msgid":"<01b3b552-7249-4d76-0c44-906ed1afd829@denx.de>","list_archive_url":null,"date":"2017-09-06T19:10:53","subject":"Re: [U-Boot] [PATCH v3 10/14] doc: overlays: Tweak documentation\n\tregarding overlays","submitter":{"id":70701,"url":"http://patchwork.ozlabs.org/api/people/70701/","name":"Lukasz Majewski","email":"lukma@denx.de"},"content":"On 09/04/2017 10:12 PM, Pantelis Antoniou wrote:\n> From: Franklin S Cooper Jr \n> \n> Pull some information regarding overlays from commit messages and\n> put them directly within the documentation. Also add some information\n> regarding required dtc version to properly use overlays.\n> \n> Signed-off-by: Franklin S Cooper Jr \n> ---\n> doc/README.fdt-overlays | 85 +++++++++++++++++++++++++++++++++++--\n> doc/uImage.FIT/overlay-fdt-boot.txt | 8 +++-\n> 2 files changed, 87 insertions(+), 6 deletions(-)\n> \n> diff --git a/doc/README.fdt-overlays b/doc/README.fdt-overlays\n> index ee868ec..39139cb 100644\n> --- a/doc/README.fdt-overlays\n> +++ b/doc/README.fdt-overlays\n> @@ -1,9 +1,76 @@\n> -U-Boot FDT Overlay usage (without FIT images)\n> +U-Boot FDT Overlay usage\n> =============================================\n> \n> -FDT overlays are now available for use even without FIT images.\n> -It is not as automagic as with FIT images though and require a few\n> -manual steps.\n> +Overlays Syntax\n> +---------------\n> +\n> +Overlays require slightly different syntax compared to traditional overlays.\n> +Please refer to dt-object-internal.txt in the dtc sources for information\n> +regarding the internal format of overlays:\n> +https://git.kernel.org/pub/scm/utils/dtc/dtc.git/tree/Documentation/dt-object-internal.txt\n> +\n> +Building Overlays\n> +-----------------\n> +\n> +In a nutshell overlays provides a means to manipulate a symbol a previous dtb\n> +or overlay has defined. It requires both the base and all the overlays\n> +to be compiled with the -@ command line switch so that symbol information is\n> +included.\n> +\n> +Note support for -@ option can only be found in dtc version 1.4.4 or newer.\n> +Only version 4.14 or higher of the Linux kernel includes a built in version\n> +of dtc that meets this requirement.\n> +\n> +Building an overlay follows the same process as building a traditional dtb.\n> +\n> +For example:\n> +\n> +base.dts\n> +--------\n> +\n> +\t/dts-v1/;\n> +\t/ {\n> +\t\tfoo: foonode {\n> +\t\t\tfoo-property;\n> +\t\t};\n> +\t};\n> +\n> +\t$ dtc -@ -I dts -O dtb -o base.dtb base.dts\n> +\n> +bar.dts\n> +-------\n> +\n> +\t/dts-v1/;\n> +\t/plugin/;\n> +\t/ {\n> +\t\tfragment@1 {\n> +\t\t\ttarget = <&foo>;\n> +\t\t\t__overlay__ {\n> +\t\t\t\toverlay-1-property;\n> +\t\t\t\tbar: barnode {\n> +\t\t\t\t\tbar-property;\n> +\t\t\t\t};\n> +\t\t\t};\n> +\t\t};\n> +\t};\n> +\n> +\t$ dtc -@ -I dts -O dtb -o bar.dtb bar.dts\n> +\n> +Ways to Utilize Overlays in U-boot\n> +----------------------------------\n> +\n> +There are two ways to apply overlays in U-boot.\n> +1. Include and define overlays within a FIT image and have overlays\n> + automatically applied.\n> +\n> +2. Manually load and apply overlays\n> +\n> +The remainder of this document will discuss using overlays via the manual\n> +approach. For information on using overlays as part of a FIT image please see:\n> +doc/uImage.FIT/overlay-fdt-boot.txt\n> +\n> +Manually Loading and Applying Overlays\n> +--------------------------------------\n> \n> 1. Figure out where to place both the base device tree blob and the\n> overlay. Make sure you have enough space to grow the base tree without\n> @@ -29,6 +96,16 @@ overlapping anything.\n> \n> => fdt apply $fdtovaddr\n> \n> +6. Boot system like you would do with a traditional dtb.\n> +\n> +For bootm:\n> +\n> +=> bootm ${kerneladdr} - ${fdtaddr}\n> +\n> +For bootz:\n> +\n> +=> bootz ${kerneladdr} - ${fdtaddr}\n> +\n> Please note that in case of an error, both the base and overlays are going\n> to be invalidated, so keep copies to avoid reloading.\n> \n> diff --git a/doc/uImage.FIT/overlay-fdt-boot.txt b/doc/uImage.FIT/overlay-fdt-boot.txt\n> index dbdf2a1..63e47da 100644\n> --- a/doc/uImage.FIT/overlay-fdt-boot.txt\n> +++ b/doc/uImage.FIT/overlay-fdt-boot.txt\n> @@ -1,5 +1,5 @@\n> -U-Boot FDT Overlay usage\n> -========================\n> +U-Boot FDT Overlay FIT usage\n> +============================\n> \n> Introduction\n> ------------\n> @@ -8,6 +8,10 @@ of similar boards and their expansion options. The same kernel on DT enabled\n> platforms can support this easily enough by providing a DT blob upon boot\n> that matches the desired configuration.\n> \n> +This document focuses on specifically using overlays as part of a FIT image.\n> +General information regarding overlays including its syntax and building it\n> +can be found in doc/README.fdt-overlays\n> +\n> Configuration without overlays\n> ------------------------------\n> \n> \n\nReviwed-by: Łukasz Majewski","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; helo=lists.denx.de;\n\tenvelope-from=u-boot-bounces@lists.denx.de;\n\treceiver=)","Received":["from lists.denx.de (dione.denx.de [81.169.180.215])\n\tby ozlabs.org (Postfix) with ESMTP id 3xnY8X68Lqz9t2c\n\tfor ;\n\tThu, 7 Sep 2017 05:11:07 +1000 (AEST)","by lists.denx.de (Postfix, from userid 105)\n\tid 3E988C21FA1; Wed, 6 Sep 2017 19:11:01 +0000 (UTC)","from lists.denx.de (localhost [IPv6:::1])\n\tby lists.denx.de (Postfix) with ESMTP id C03E3C21E3B;\n\tWed, 6 Sep 2017 19:10:58 +0000 (UTC)","by lists.denx.de (Postfix, from userid 105)\n\tid 67B0CC21E3B; Wed, 6 Sep 2017 19:10:57 +0000 (UTC)","from mail-out.m-online.net (mail-out.m-online.net [212.18.0.10])\n\tby lists.denx.de (Postfix) with ESMTPS id DE775C21DB5\n\tfor ; Wed, 6 Sep 2017 19:10:56 +0000 (UTC)","from frontend01.mail.m-online.net (unknown [192.168.8.182])\n\tby mail-out.m-online.net (Postfix) with ESMTP id 3xnY8J4ryRz1qsWD;\n\tWed, 6 Sep 2017 21:10:56 +0200 (CEST)","from localhost (dynscan1.mnet-online.de [192.168.6.70])\n\tby mail.m-online.net (Postfix) with ESMTP id 3xnY8J2SVrz3hj6D;\n\tWed, 6 Sep 2017 21:10:56 +0200 (CEST)","from mail.mnet-online.de ([192.168.8.182])\n\tby localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new,\n\tport 10024)\n\twith ESMTP id Reqbm6ZHMQEf; Wed, 6 Sep 2017 21:10:54 +0200 (CEST)","from [192.168.2.222] (89-64-27-66.dynamic.chello.pl [89.64.27.66])\n\t(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mail.mnet-online.de (Postfix) with ESMTPSA;\n\tWed, 6 Sep 2017 21:10:54 +0200 (CEST)"],"X-Spam-Checker-Version":"SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de","X-Spam-Level":"","X-Spam-Status":"No, score=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,\n\tRCVD_IN_MSPIKE_H3,\n\tRCVD_IN_MSPIKE_WL autolearn=unavailable autolearn_force=no\n\tversion=3.4.0","X-Virus-Scanned":"amavisd-new at mnet-online.de","X-Auth-Info":"z+DInfIod9Ws6xxUzaH8u/jqKZIm9nTyKJd6uTeWrVk=","To":"Pantelis Antoniou ,\n\tTom Rini ","References":"<1504555943-12893-1-git-send-email-pantelis.antoniou@konsulko.com>\n\t<1504555943-12893-11-git-send-email-pantelis.antoniou@konsulko.com>","From":"=?utf-8?q?=C5=81ukasz_Majewski?= ","Organization":"DENX","Message-ID":"<01b3b552-7249-4d76-0c44-906ed1afd829@denx.de>","Date":"Wed, 6 Sep 2017 21:10:53 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.2.1","MIME-Version":"1.0","In-Reply-To":"<1504555943-12893-11-git-send-email-pantelis.antoniou@konsulko.com>","Content-Language":"en-US","Cc":"Marek Vasut , Tero Kristo ,\n\tu-boot@lists.denx.de, Alan Ott ,\n\tMaxime Ripard ,\n\tStefan Roese , Franklin S Cooper Jr ","Subject":"Re: [U-Boot] [PATCH v3 10/14] doc: overlays: Tweak documentation\n\tregarding overlays","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.18","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Transfer-Encoding":"base64","Content-Type":"text/plain; charset=\"utf-8\"; Format=\"flowed\"","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "}},{"id":1765715,"web_url":"http://patchwork.ozlabs.org/comment/1765715/","msgid":"","list_archive_url":null,"date":"2017-09-09T04:54:11","subject":"Re: [U-Boot] [PATCH v3 10/14] doc: overlays: Tweak documentation\n\tregarding overlays","submitter":{"id":6170,"url":"http://patchwork.ozlabs.org/api/people/6170/","name":"Simon Glass","email":"sjg@chromium.org"},"content":"On 4 September 2017 at 14:12, Pantelis Antoniou\n wrote:\n> From: Franklin S Cooper Jr \n>\n> Pull some information regarding overlays from commit messages and\n> put them directly within the documentation. Also add some information\n> regarding required dtc version to properly use overlays.\n>\n> Signed-off-by: Franklin S Cooper Jr \n> ---\n> doc/README.fdt-overlays | 85 +++++++++++++++++++++++++++++++++++--\n> doc/uImage.FIT/overlay-fdt-boot.txt | 8 +++-\n> 2 files changed, 87 insertions(+), 6 deletions(-)\n\nAcked-by: Simon Glass ","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; helo=lists.denx.de;\n\tenvelope-from=u-boot-bounces@lists.denx.de;\n\treceiver=)","ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=google.com header.i=@google.com\n\theader.b=\"fiNzLk9H\"; \n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=chromium.org header.i=@chromium.org\n\theader.b=\"bK9PatQz\"; dkim-atps=neutral"],"Received":["from lists.denx.de (dione.denx.de [81.169.180.215])\n\tby ozlabs.org (Postfix) with ESMTP id 3xq28Z1tK8z9sBZ\n\tfor ;\n\tSat, 9 Sep 2017 15:01:18 +1000 (AEST)","by lists.denx.de (Postfix, from userid 105)\n\tid E052AC21F07; 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\n\tFri, 08 Sep 2017 21:54:32 -0700 (PDT)","MIME-Version":"1.0","In-Reply-To":"<1504555943-12893-11-git-send-email-pantelis.antoniou@konsulko.com>","References":"<1504555943-12893-1-git-send-email-pantelis.antoniou@konsulko.com>\n\t<1504555943-12893-11-git-send-email-pantelis.antoniou@konsulko.com>","From":"Simon Glass ","Date":"Fri, 8 Sep 2017 22:54:11 -0600","X-Google-Sender-Auth":"weqhKbpFGt37tzhFMK7T0UVtvf8","Message-ID":"","To":"Pantelis Antoniou ","Cc":"Marek Vasut , Tom Rini ,\n\tTero Kristo ,\n\tU-Boot Mailing List , \n\tFranklin S Cooper Jr ,\n\tMaxime Ripard ,\n\tStefan Roese , Alan Ott ","Subject":"Re: [U-Boot] [PATCH v3 10/14] doc: overlays: Tweak documentation\n\tregarding overlays","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.18","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "}},{"id":1769381,"web_url":"http://patchwork.ozlabs.org/comment/1769381/","msgid":"","list_archive_url":null,"date":"2017-09-15T19:19:39","subject":"Re: [U-Boot] [PATCH v3 10/14] doc: overlays: Tweak documentation\n\tregarding overlays","submitter":{"id":12501,"url":"http://patchwork.ozlabs.org/api/people/12501/","name":"Simon Glass","email":"sjg@google.com"},"content":"On 4 September 2017 at 14:12, Pantelis Antoniou\n wrote:\n> From: Franklin S Cooper Jr \n>\n> Pull some information regarding overlays from commit messages and\n> put them directly within the documentation. Also add some information\n> regarding required dtc version to properly use overlays.\n>\n> Signed-off-by: Franklin S Cooper Jr \n> ---\n> doc/README.fdt-overlays | 85 +++++++++++++++++++++++++++++++++++--\n> doc/uImage.FIT/overlay-fdt-boot.txt | 8 +++-\n> 2 files changed, 87 insertions(+), 6 deletions(-)\n\nAcked-by: Simon Glass \n\nApplied to u-boot-fdt thanks!","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; helo=lists.denx.de;\n\tenvelope-from=u-boot-bounces@lists.denx.de;\n\treceiver=)","ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=google.com header.i=@google.com\n\theader.b=\"s8OwBZ0h\"; dkim-atps=neutral"],"Received":["from lists.denx.de (dione.denx.de [81.169.180.215])\n\tby ozlabs.org (Postfix) with ESMTP id 3xv5385Cq7z9s7g\n\tfor ;\n\tSat, 16 Sep 2017 05:25:40 +1000 (AEST)","by lists.denx.de (Postfix, from userid 105)\n\tid 32134C21FFA; Fri, 15 Sep 2017 19:21:02 +0000 (UTC)","from lists.denx.de (localhost [IPv6:::1])\n\tby lists.denx.de (Postfix) with ESMTP id 5FF2AC21F21;\n\tFri, 15 Sep 2017 19:20:12 +0000 (UTC)","by lists.denx.de (Postfix, from userid 105)\n\tid 278A1C21EF7; Fri, 15 Sep 2017 19:19:48 +0000 (UTC)","from mail-qk0-f177.google.com (mail-qk0-f177.google.com\n\t[209.85.220.177])\n\tby lists.denx.de (Postfix) with ESMTPS id 3912DC21F4B\n\tfor ; Fri, 15 Sep 2017 19:19:44 +0000 (UTC)","by mail-qk0-f177.google.com with SMTP id u67so2949876qkg.6\n\tfor ; Fri, 15 Sep 2017 12:19:44 -0700 (PDT)","from 480794996271 named unknown by gmailapi.google.com with\n\tHTTPREST; Fri, 15 Sep 2017 21:19:39 +0200"],"X-Spam-Checker-Version":"SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de","X-Spam-Level":"","X-Spam-Status":"No, score=-0.0 required=5.0 tests=RCVD_IN_DNSWL_NONE,\n\tRCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, T_DKIM_INVALID,\n\tUNPARSEABLE_RELAY\n\tautolearn=unavailable autolearn_force=no version=3.4.0","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com;\n\ts=20161025; \n\th=mime-version:sender:from:in-reply-to:references:date:message-id\n\t:subject:to:cc;\n\tbh=EsHyjd4o1RW/RVDPJZ5iPQv6NxU18iyLEnzU5iqiZOI=;\n\tb=s8OwBZ0hcfz3ue1Q8BuwQ+VS/c/FhVSwWTNSW1KhU+C8Scc7IE9cfFC/TaOcT+06w6\n\tOvE1G4m8RcrBbW3aFd2wK7lqvnixraZtq7RGrCqBTsRK/sSQYqXJ/xodYIcEfLaApnho\n\txMRgcOSTa+S9GHfBQl+KiS8Fg2rHweUYGSCHrvIxXnFMI4eSUXh4jdWpSbribCiaNMJE\n\tJM6D9eHAYAQmPF7kFLQpkPOhYwPTEnM9Z4Ed04U4VmnW0qQwss7rb3bQuDinhvPzIlyN\n\t/IAJuqxXmNCtm3I/sLJIv06/aKI3qus32q85J3ValfUFcyxL7rEj8oZZ/Nucdy7wNRGB\n\tuWow==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:mime-version:sender:from:in-reply-to:references\n\t:date:message-id:subject:to:cc;\n\tbh=EsHyjd4o1RW/RVDPJZ5iPQv6NxU18iyLEnzU5iqiZOI=;\n\tb=PvewJllufx2NFqbvl6F60C6cpP/IApJCNV5O0jVm6o0YzslSAC648hyKRCaTwt1vRf\n\tlri/Pw7rE3kLMmvLkbPt9ClRx5yOjckev7j7iQ6Nbi+xbznsLltWf4CW8lC2Zr1TzbIG\n\tjFUv2+DLt+9Tfmg0vaWBUZjP3ndZTGCryLONRNR0PT9KdFSQ5AgkL7z7DgtsdusCBrOp\n\tsusc35wGUCXM689uMcr4HCopc+7eHIePdYrtC13XvPV0af7kD00zj/iLIBRT9+FBK8ii\n\tZ15E/Dvav2ybxsb4O5xgVoo/NcO8LlCNGmB4e+N9+RX+baxS2GC4wGWw68l7AlVtz4+r\n\t0eBQ==","X-Gm-Message-State":"AHPjjUiCjsIOuKDZFkuHKOonhh7N9eVlQBdgsphylbS2I3N5Ka6vmL4A\n\t4cS2f2Go67h8Ivev/LgKzX3aEsybh3bnu35DH2QS+w==","X-Google-Smtp-Source":"AOwi7QCCgFlI7OGjHOkq6sd9uYRcIPn6xA9eRKvvVtWl+/1VvK5dj1IIvOpsusKn7yx9j2H5SiBPOvf5RekawVh6YBo=","X-Received":"by 10.55.81.215 with SMTP id f206mr9177661qkb.188.1505503182933; \n\tFri, 15 Sep 2017 12:19:42 -0700 (PDT)","MIME-Version":"1.0","From":"sjg@google.com","In-Reply-To":"","References":"\n\t<1504555943-12893-1-git-send-email-pantelis.antoniou@konsulko.com>\n\t<1504555943-12893-11-git-send-email-pantelis.antoniou@konsulko.com>","Date":"Fri, 15 Sep 2017 21:19:39 +0200","X-Google-Sender-Auth":"mMtZX80gJw_oOam3Ifat6OfNGxs","Message-ID":"","To":"Simon Glass ","Cc":"Marek Vasut , Tom Rini ,\n\tPantelis Antoniou ,\n\tTero Kristo ,\n\tU-Boot Mailing List , \n\tFranklin S Cooper Jr ,\n\tMaxime Ripard ,\n\tStefan Roese , Alan Ott ","Subject":"Re: [U-Boot] [PATCH v3 10/14] doc: overlays: Tweak documentation\n\tregarding overlays","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.18","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "}}]