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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A276C6FA82 for ; Thu, 15 Sep 2022 00:32:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229759AbiIOAcn (ORCPT ); Wed, 14 Sep 2022 20:32:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230100AbiIOAcj (ORCPT ); Wed, 14 Sep 2022 20:32:39 -0400 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D7D589829 for ; Wed, 14 Sep 2022 17:32:34 -0700 (PDT) Received: by mail-pj1-x1033.google.com with SMTP id o70-20020a17090a0a4c00b00202f898fa86so6528279pjo.2 for ; Wed, 14 Sep 2022 17:32:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=wgA0pQDx3veU9g0AoVu5wc85WYVoT5GTHjt98pcKj9k=; b=mobLF2m/Bm7QflNMvTf+auy6gLr0+oTzSWRF5VlrT7aEbDZmRcWt9teXqQi2jq2qkY EEp2VqygMUUR9p8KdUkOcbIzGlaLM2bpGmJw3zft6RxbmRykjjJVdYeHoaQ6WbS2y0J/ JU/DOwPF8/xYnMuYalPu99y65ebSYiGGOFxdY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=wgA0pQDx3veU9g0AoVu5wc85WYVoT5GTHjt98pcKj9k=; b=Fuxxi4SHnK17OaZBZKZCebw3hLo8SRLVbITgtkRpXDrm9Ee92PBYi/dDxXI+UKLItc JkF6mZCWOeP5RiIlCwjS/oaTJKvypnazEnl828tEKbN5wwY12iwsf4a7sbX1LmiLVpiu If1YPh1R8+5KShqmPF651/j977KXTWdhnSoZkT3ZCTxUMNUq3yQZQUCPDQyQMDPi68pP Yr7grXkk/JP/sENzDxTh4CxnCOdMnSGBN7Asbq89/KbFr8pz4LPSbcckazBQUYQUag2b RvaA2UlCvDxud2RyNpV6Z6+9B2PxmiNgvPG2EdfNWAJ/nWg0v/Imk/Xkojzfqr/zUBaV DV9A== X-Gm-Message-State: ACrzQf09SPuDWN4XreOj0eSIXc3xqbknfPBkjJPNfrwGA9AjwopEQbH7 XTPcYN3wo7dS+EtxYkfnoPFsEQ== X-Google-Smtp-Source: AMsMyM4w69T/vqw4XP1OMabuKOrP+WlzN90PH8kVL60I39PX3eLtYbvrXFzq8OJAQLplRPaFbu7p6g== X-Received: by 2002:a17:902:a418:b0:174:6711:92c1 with SMTP id p24-20020a170902a41800b00174671192c1mr1609699plq.146.1663201953163; Wed, 14 Sep 2022 17:32:33 -0700 (PDT) Received: from jwerner-p920.mtv.corp.google.com ([2620:15c:202:201:347e:2a81:558b:d912]) by smtp.gmail.com with ESMTPSA id 199-20020a6214d0000000b0053e22c7f135sm10991202pfu.141.2022.09.14.17.32.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Sep 2022 17:32:32 -0700 (PDT) From: Julius Werner To: Krzysztof Kozlowski , Rob Herring Cc: Dmitry Osipenko , Doug Anderson , Jian-Jia Su , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Julius Werner Subject: [PATCH 2/4 v4] dt-bindings: memory: Add numeric LPDDR compatible string variant Date: Wed, 14 Sep 2022 17:32:20 -0700 Message-Id: <20220915003222.1296421-2-jwerner@chromium.org> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog In-Reply-To: <20220915003222.1296421-1-jwerner@chromium.org> References: <20220915003222.1296421-1-jwerner@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch allows a new kind of compatible string for LPDDR parts in the device tree bindings, in addition to the existing hardcoded , strings. The new format contains manufacturer and part (revision) information in numerical form, such as lpddr3-ff,0201 for an LPDDR3 part with manufacturer ID ff and revision ID 0201. This helps cases where LPDDR parts are probed at runtime by boot firmware and cannot be matched to hardcoded part numbers, such as the firmware on the qcom/sc7280-herobrine boards does (which supports 4 different memory configurations at the moment, and more are expected to be added later at a point where the boot firmware can no longer be updated to specifically accomodate them). Signed-off-by: Julius Werner --- .../memory-controllers/ddr/jedec,lpddr-props.yaml | 10 ++++++++++ .../memory-controllers/ddr/jedec,lpddr2.yaml | 8 +++++--- .../memory-controllers/ddr/jedec,lpddr3.yaml | 12 ++++++++---- 3 files changed, 23 insertions(+), 7 deletions(-) Changelog: - v2 - Updated commit message to describe intended use case as an example - v3 - no changes - v4 - no changes diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml index 02700ac3c387ec..4114cfa8de67f1 100644 --- a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml @@ -15,6 +15,16 @@ maintainers: - Krzysztof Kozlowski properties: + compatible: + description: + Compatible strings can be either explicit vendor names and part numbers + (e.g. elpida,ECB240ABACN), or generated strings of the form + lpddrX-YY,ZZZZ where X is the LPDDR version, YY is the manufacturer ID + (from MR5) and ZZZZ is the revision ID (from MR6 and MR7). Both IDs are + formatted in lower case hexadecimal representation with leading zeroes. + The latter form can be useful when LPDDR nodes are created at runtime by + boot firmware that doesn't have access to static part number information. + revision-id: $ref: /schemas/types.yaml#/definitions/uint32-array description: diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml index e5e15d288d89b2..a237bc259273bf 100644 --- a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml @@ -20,13 +20,15 @@ properties: - elpida,ECB240ABACN - elpida,B8132B2PB-6D-F - enum: - - jedec,lpddr2-s4 - - items: - - enum: + - jedec,lpddr2-nvm - jedec,lpddr2-s2 + - jedec,lpddr2-s4 - items: + - pattern: "^lpddr2-[0-9a-f]{2},[0-9a-f]{4}$" - enum: - jedec,lpddr2-nvm + - jedec,lpddr2-s2 + - jedec,lpddr2-s4 revision-id1: $ref: /schemas/types.yaml#/definitions/uint32 diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml index 0f7ab51842ae09..e328a1195ba646 100644 --- a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml @@ -14,10 +14,14 @@ allOf: properties: compatible: - items: - - enum: - - samsung,K3QF2F20DB - - const: jedec,lpddr3 + oneOf: + - items: + - enum: + - samsung,K3QF2F20DB + - const: jedec,lpddr3 + - items: + - pattern: "^lpddr3-[0-9a-f]{2},[0-9a-f]{4}$" + - const: jedec,lpddr3 '#address-cells': const: 1 -- 2.31.0