From patchwork Sat Jun 13 18:40:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Shtylyov X-Patchwork-Id: 199099 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=-5.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 2DD7AC433DF for ; Sat, 13 Jun 2020 18:40:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0FF93207DD for ; Sat, 13 Jun 2020 18:40:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cogentembedded-com.20150623.gappssmtp.com header.i=@cogentembedded-com.20150623.gappssmtp.com header.b="AiRqStl6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726258AbgFMSky (ORCPT ); Sat, 13 Jun 2020 14:40:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726517AbgFMSky (ORCPT ); Sat, 13 Jun 2020 14:40:54 -0400 Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66F99C08C5C2 for ; Sat, 13 Jun 2020 11:40:52 -0700 (PDT) Received: by mail-lf1-x129.google.com with SMTP id 82so7274554lfh.2 for ; Sat, 13 Jun 2020 11:40:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cogentembedded-com.20150623.gappssmtp.com; s=20150623; h=subject:from:to:cc:references:organization:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=2ioFOqkA4a9a6fr9aGiz3zoxmx46SUsrv5GXgVDo4ss=; b=AiRqStl64KJspJSsGdLeJ+CRipTU5MqMyxGmA7ZYRDsduWAhyz+K4Mp12yzYrW3h2Z kQrrSw8F36967ah7xyOErSO7C0FOe86MFfKr60ZjRX6s5EGEWBlZXQ79EY7fmj49DZ8b sFuWyeA+ajOyXWhp+dnjgLWr1Jwd4XFfk7VcTnfJt4yvSpMVXhNMdc7vzElaNQcHuFfF Yt0Jku2WBGZhPCOBWTmn7IgzLEWLn0VHKHj63Kmm0EhNDv+aFR9wyuPPBweXP5d2Riuv Oh1caPbdYCe5vJ1SQuUfzgGCTeC89Lr+0VZdhFc+KKf5sgqNsZZTK/V3alHABWFs5HZ/ k/5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:references:organization :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=2ioFOqkA4a9a6fr9aGiz3zoxmx46SUsrv5GXgVDo4ss=; b=di4wUmDeMgcAk1wJyTFyqpX0z/QjzvUyrJjfGRlnOLiKbx87BdBvkuuS10I0hiuwka aZIUrA28xgRyNjvNlgFqteBzRr411sPA95n14bu99bqbjq3Yv7PCyyHGD9d6WG5VOScT l7yIWt69atr1CBWBVhsdTqk50Z4l9O++LRz4/NPUNSr9/gd+7x9RNqRszSJjVzKMFfgp QBLVWVStOVSgVS4QemwXyM2/346sPipsbEYC1pNeE7rmUFkWEVK85dWmjGosrl62uMs8 7SI7bT3S7zi+5YE56nwSvo0q0ATlezh4cII9pcegD1h3kLadVTLzpSynIrfLnrUx+YwJ km0Q== X-Gm-Message-State: AOAM531dNWnMTNchBQtaN+IhtpvNq3UlX2m1obmoFOdjARtWywWPo2oZ KiJa9CsDwuE1e27COvaS+UaGUg== X-Google-Smtp-Source: ABdhPJyrG3RYdz2pYb8REdSpMtdT/bq1MHQ9n1xyhXYwIOLmAlDW70L8HixuJJw72laZSgiJcU939g== X-Received: by 2002:ac2:511d:: with SMTP id q29mr9755341lfb.24.1592073650300; Sat, 13 Jun 2020 11:40:50 -0700 (PDT) Received: from wasted.cogentembedded.com ([2a00:1fa0:2e2:84d1:c335:1451:e577:e115]) by smtp.gmail.com with ESMTPSA id v23sm2763684ljg.122.2020.06.13.11.40.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 13 Jun 2020 11:40:49 -0700 (PDT) Subject: [PATCH v4 1/2] dt-bindings: memory: document Renesas RPC-IF bindings From: Sergei Shtylyov To: Rob Herring , devicetree@vger.kernel.org Cc: Mason Yang , linux-spi@vger.kernel.org, Chris Brandt , linux-mtd@lists.infradead.org, linux-renesas-soc@vger.kernel.org References: <721e5306-6dc5-4a3a-2bbb-459be6261357@cogentembedded.com> Organization: Cogent Embedded Message-ID: <4becbd3b-c9b9-070a-5771-48cade6651e5@cogentembedded.com> Date: Sat, 13 Jun 2020 21:40:48 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <721e5306-6dc5-4a3a-2bbb-459be6261357@cogentembedded.com> Content-Language: en-MW Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Renesas Reduced Pin Count Interface (RPC-IF) allows a SPI flash or HyperFlash connected to the SoC to be accessed via the external address space read mode or the manual mode. Document the device tree bindings for the Renesas RPC-IF found in the R-Car gen3 SoCs. Based on the original patch by Mason Yang . Signed-off-by: Sergei Shtylyov --- Changes in version 4: - added the SoC name comments to the RPC-IF's "compatible" prop description; - removed a hyphen before 'enum' in the subnode description; - removed leading 0s in the "reg" prop in the example. Changes in version 3: - fixed up the whitespace and added hyphens in the "compatible" prop text, also removed the comments; - specified the subnode name as "flash", and used "enum" in the subnode text; - fixed up the SPDX-License-Identifier: tag. Changes in version 2: - rewrote the bindings in YAML. Documentation/devicetree/bindings/memory-controllers/renesas,rpc-if.yaml | 87 ++++++++++ 1 file changed, 87 insertions(+) Index: linux/Documentation/devicetree/bindings/memory-controllers/renesas,rpc-if.yaml =================================================================== --- /dev/null +++ linux/Documentation/devicetree/bindings/memory-controllers/renesas,rpc-if.yaml @@ -0,0 +1,87 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/memory-controllers/renesas,rpc-if.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas Reduced Pin Count Interface (RPC-IF) + +maintainers: + - Sergei Shtylyov + +description: | + Renesas RPC-IF allows a SPI flash or HyperFlash connected to the SoC to + be accessed via the external address space read mode or the manual mode. + + The flash chip itself should be represented by a subnode of the RPC-IF node. + The flash interface is selected based on the "compatible" property of this + subnode: + - if it contains "jedec,spi-nor", then SPI is used; + - if it contains "cfi-flash", then HyperFlash is used. + +allOf: + - $ref: "/schemas/spi/spi-controller.yaml#" + +properties: + compatible: + items: + - enum: + - renesas,r8a77980-rpc-if # R-Car V3H + - renesas,r8a77995-rpc-if # R-Car D3 + - const: renesas,rcar-gen3-rpc-if # a generic R-Car gen3 device + + reg: + items: + - description: RPC-IF registers + - description: direct mapping read mode area + - description: write buffer area + + reg-names: + items: + - const: regs + - const: dirmap + - const: wbuf + + clocks: + maxItems: 1 + + power-domains: + maxItems: 1 + + resets: + maxItems: 1 + +patternProperties: + "flash@[0-9a-f]+$": + type: object + properties: + compatible: + enum: + - cfi-flash + - jedec,spi-nor + +examples: + - | + #include + #include + + spi@ee200000 { + compatible = "renesas,r8a77995-rpc-if", "renesas,rcar-gen3-rpc-if"; + reg = <0xee200000 0x200>, + <0x08000000 0x4000000>, + <0xee208000 0x100>; + reg-names = "regs", "dirmap", "wbuf"; + clocks = <&cpg CPG_MOD 917>; + power-domains = <&sysc R8A77995_PD_ALWAYS_ON>; + resets = <&cpg 917>; + #address-cells = <1>; + #size-cells = <0>; + + flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + spi-max-frequency = <40000000>; + spi-tx-bus-width = <1>; + spi-rx-bus-width = <1>; + }; + };