From patchwork Fri Apr 16 09:32:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Po-Kai Chi X-Patchwork-Id: 422811 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, 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 99C2FC43460 for ; Fri, 16 Apr 2021 09:32:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 697496113B for ; Fri, 16 Apr 2021 09:32:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241824AbhDPJcy (ORCPT ); Fri, 16 Apr 2021 05:32:54 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:39475 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S241822AbhDPJcx (ORCPT ); Fri, 16 Apr 2021 05:32:53 -0400 X-UUID: 56d9d2d805df476ebd285e5fa8ebc74b-20210416 X-UUID: 56d9d2d805df476ebd285e5fa8ebc74b-20210416 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 190938495; Fri, 16 Apr 2021 17:32:23 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 16 Apr 2021 17:32:22 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 16 Apr 2021 17:32:22 +0800 From: Po-Kai Chi To: Matthias Brugger CC: , , , , CC Hwang , Po-Kai Chi Subject: [PATCH v2 1/4] dt-bindings: memory: Add binding for MediaTek DRAM Controller Date: Fri, 16 Apr 2021 17:32:15 +0800 Message-ID: <1618565538-6972-2-git-send-email-pk.chi@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1618565538-6972-1-git-send-email-pk.chi@mediatek.com> References: <1618565538-6972-1-git-send-email-pk.chi@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch adds the documentation of the device-tree binding for MediaTek DRAM Controller. Signed-off-by: Po-Kai Chi --- .../memory-controllers/mediatek,dramc.yaml | 162 ++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,dramc.yaml diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,dramc.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,dramc.yaml new file mode 100644 index 0000000..18f77c2 --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,dramc.yaml @@ -0,0 +1,162 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (c) 2021 MediaTek Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/memory-controllers/mediatek,dramc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek DRAM Controller + +maintainers: + - Po-Kai Chi + +description: | + MediaTek DRAM controller (DRAMC) provides an interface to query information + about DRAM which collected from bootloader and device tree. + This is mainly used by MediaTek Extended Memory Interface (EMI) and DVFS Resource + Control (DVFSRC). + +properties: + compatible: + items: + - enum: + - mediatek,mt6779-dramc + + reg: + description: + Base address of MediaTek DRAM related hardware modules, each channel has + its own base address in order of + DRAMC_AO_{CH}, DRAMC_NAO_{CH}, DDRPHY_AO_{CH}. + minItems: 3 # 3 * N channels + maxItems: 6 + + mediatek,dram-type: + description: + The DRAM type of current DRAM chip. + This property is filled in by bootloader according to the board hardware + configuration. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 7 + + mediatek,support-channel-cnt: + description: + The maximum DRAM channel count supported by SoC. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 4 + + mediatek,channel-cnt: + description: + The DRAM channel count of current DRAM chip. + This property is filled in by bootloader according to the board hardware + configuration. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 4 + + mediatek,rank-cnt: + description: + The DRAM rank count of current DRAM chip. + This property is filled in by bootloader according to the board hardware + configuration. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 2 + + mediatek,rank-size: + description: + An array of 64-bits unsigned integer that describes the size of each + DRAM rank. + This property is filled in by bootloader according to the board hardware + configuration. + $ref: /schemas/types.yaml#/definitions/uint64-array + minItems: 1 + maxItems: 2 + items: + minimum: 0x0 + maximum: 0x100000000 # support up to 4GB in single rank + + mediatek,mr-cnt: + description: + Specifies how many sets of DRAM mode register information to provide. + This property is filled in by bootloader according to the board hardware + configuration. + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 40 # total 40 MRs for JEDEC LPDDR4X + + mediatek,mr: + description: + Pair of DRAM mode register information. + This property is filled in by bootloader according to the board hardware + configuration. + $ref: /schemas/types.yaml#/definitions/uint32-matrix + maxItems: 40 # align with mediatek,mr-cnt + items: + items: + - description: + Mode register index + - description: + Mode register value + + mediatek,freq-cnt: + description: + Specifies how many sets of DRAM data clock rate supported by SoC. + $ref: /schemas/types.yaml#/definitions/uint32 + + mediatek,freq-step: + description: + The DRAM data clock rate may be slightly different from those defined + by the specification due to errors in multiples of the base frequency. + This describe the mapping from real data clock rate measured by + frequency meter to JEDEC data clock rate. + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + items: + - description: + Real data rate + - description: + Spec data rate + +required: + - compatible + - reg + - mediatek,dram-type + - mediatek,support-channel-cnt + - mediatek,channel-cnt + - mediatek,rank-cnt + - mediatek,mr-cnt + - mediatek,freq-cnt + +additionalProperties: false + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + dramc@10230000 { + compatible = "mediatek,mt6779-dramc"; + reg = <0 0x10230000 0 0x2000>, /* DRAMC AO CHA */ + <0 0x10240000 0 0x2000>, /* DRAMC AO CHB */ + <0 0x10234000 0 0x1000>, /* DRAMC NAO CHA */ + <0 0x10244000 0 0x1000>, /* DRAMC NAO CHB */ + <0 0x10238000 0 0x2000>, /* DDRPHY AO CHA */ + <0 0x10248000 0 0x2000>; /* DDRPHY AO CHB */ + mediatek,dram-type = <0>; + mediatek,support-channel-cnt = <2>; + mediatek,channel-cnt = <2>; + mediatek,rank-cnt = <2>; + mediatek,rank-size = <0x40000000 0x40000000>; + mediatek,mr-cnt = <1>; + mediatek,mr = <0x5 0xff>; + mediatek,freq-cnt = <6>; + mediatek,freq-step = <3718 3733>, + <3094 3200>, + <2392 2400>, + <1534 1600>, + <1196 1200>, + <754 800>; + }; + };