From patchwork Tue Nov 12 11:03:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 1193430 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="C4hLLbX/"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47C4dC2BBHz9sPL for ; Tue, 12 Nov 2019 22:04:31 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726949AbfKLLE2 (ORCPT ); Tue, 12 Nov 2019 06:04:28 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:33984 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726977AbfKLLE1 (ORCPT ); Tue, 12 Nov 2019 06:04:27 -0500 Received: by mail-pf1-f195.google.com with SMTP id n13so13137104pff.1 for ; Tue, 12 Nov 2019 03:04:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=zggh2jIdOWGK04q5zcQjKWWP+qeKwx7CXLJQykZLqEg=; b=C4hLLbX/8ln78IEV85sMEapAxG54Rnnc+sX1ZMqomtBFvmkK4z/PdDvPh34Bj9ZCWw vwNQfFFrqHrZhJFbNs+tCYmAFnCHsTcUsEMZTSu9w/PGvmSssPw7dtOqk2m0X3hC1p7E JTNQDF8Q5wgMz85Fb6XusJoBsxtUFAmfDtPO0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=zggh2jIdOWGK04q5zcQjKWWP+qeKwx7CXLJQykZLqEg=; b=pJj3JFcjy3kwgGJVKQ+t1981Wvvcjjqt/2Ol5mPzLylGWMfqmTZsyA6LxoTutNEbWn SE1+LAJsCwfA3QZWN+7zAeVrY4jIi/y6fURkfBeR+E2ssm0a+wxq5ZBca/wKR7v4evvC utAeh4iUTDRyhHvFLWwfp/XZt24KzHAUGeztbSBXosJWr56n+hre8vajwWD+Ekd7lj2n qFQ9PULNYNxN2pvahLAjsrELr81CK+TAUD2X8p/Ui0QRsT1qgkwf4XcfyLfqsAmhY2zR BF0rTNpy3+X7Zny1eQ8hllnB0sQek4TLXjSa/CZ/0BmFzKqqZpa/QP+fMy0pWvgEHMYx WWiQ== X-Gm-Message-State: APjAAAWEe+aP71hrIbgw+XpFc9YZrlNZmWCox8yo14dAuR3eBhMUfxJA 4cjHLvrjwLY16qkzhryV4szB+Q== X-Google-Smtp-Source: APXvYqwvTJVVFt/l+jdExvZ1uM8jy11Q514CnpJFNu9ovRjCnL/ndqBbR2yS89+qOkiPWJEzMKqBhw== X-Received: by 2002:a62:174d:: with SMTP id 74mr35392234pfx.145.1573556667081; Tue, 12 Nov 2019 03:04:27 -0800 (PST) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id 6sm21528389pfy.43.2019.11.12.03.04.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Nov 2019 03:04:26 -0800 (PST) From: Pi-Hsun Shih Cc: Pi-Hsun Shih , Erin Lo , Rob Herring , Ohad Ben-Cohen , Bjorn Andersson , Rob Herring , Mark Rutland , Matthias Brugger , linux-remoteproc@vger.kernel.org (open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM), devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v21 1/4] dt-bindings: Add a binding for Mediatek SCP Date: Tue, 12 Nov 2019 19:03:24 +0800 Message-Id: <20191112110330.179649-2-pihsun@chromium.org> X-Mailer: git-send-email 2.24.0.rc1.363.gb1bccd3e3d-goog In-Reply-To: <20191112110330.179649-1-pihsun@chromium.org> References: <20191112110330.179649-1-pihsun@chromium.org> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Erin Lo Add a DT binding documentation of SCP for the MT8183 SoC from Mediatek. Signed-off-by: Erin Lo Signed-off-by: Pi-Hsun Shih Reviewed-by: Rob Herring --- Changes from v20 ... v6: - No change. Changes from v5: - Remove dependency on CONFIG_RPMSG_MTK_SCP. Changes from v4: - Add detail of more properties. - Document the usage of mtk,rpmsg-name in subnode from the new design. Changes from v3: - No change. Changes from v2: - No change. I realized that for this patch series, there's no need to add anything under the mt8183-scp node (neither the mt8183-rpmsg or the cros-ec-rpmsg) for them to work, since mt8183-rpmsg is added directly as a rproc_subdev by code, and cros-ec-rpmsg is dynamically created by SCP name service. Changes from v1: - No change. --- .../bindings/remoteproc/mtk,scp.txt | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt new file mode 100644 index 000000000000..3ba668bab14b --- /dev/null +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt @@ -0,0 +1,36 @@ +Mediatek SCP Bindings +---------------------------------------- + +This binding provides support for ARM Cortex M4 Co-processor found on some +Mediatek SoCs. + +Required properties: +- compatible Should be "mediatek,mt8183-scp" +- reg Should contain the address ranges for the two memory + regions, SRAM and CFG. +- reg-names Contains the corresponding names for the two memory + regions. These should be named "sram" & "cfg". +- clocks Clock for co-processor (See: ../clock/clock-bindings.txt) +- clock-names Contains the corresponding name for the clock. This + should be named "main". + +Subnodes +-------- + +Subnodes of the SCP represent rpmsg devices. The names of the devices are not +important. The properties of these nodes are defined by the individual bindings +for the rpmsg devices - but must contain the following property: + +- mtk,rpmsg-name Contains the name for the rpmsg device. Used to match + the subnode to rpmsg device announced by SCP. + +Example: + + scp: scp@10500000 { + compatible = "mediatek,mt8183-scp"; + reg = <0 0x10500000 0 0x80000>, + <0 0x105c0000 0 0x5000>; + reg-names = "sram", "cfg"; + clocks = <&infracfg CLK_INFRA_SCPSYS>; + clock-names = "main"; + };