From patchwork Sun Jun 14 05:13:36 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Caesar Wang X-Patchwork-Id: 483924 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 19BC81401B5 for ; Sun, 14 Jun 2015 15:14:35 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751570AbbFNFO3 (ORCPT ); Sun, 14 Jun 2015 01:14:29 -0400 Received: from mail-pd0-f177.google.com ([209.85.192.177]:35052 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751524AbbFNFOY (ORCPT ); Sun, 14 Jun 2015 01:14:24 -0400 Received: by pdbnf5 with SMTP id nf5so49694396pdb.2; Sat, 13 Jun 2015 22:14:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tpAZ3NbVXd+y5R8unpt6MJlATEcVl0d/ukFP/jFw1Dk=; b=KZ8YwR6WDj+SG+95fD0IFU5aKfgtDmDWZoKpbKWzlLlu2NKxNXKsobPwckBWDRPD4f BPkry42tOtLlM1U3dxJtbzm2LoyYR1Wqe+xgPqEK9rFECKMvIbJf0XH5IuQAJxq/CkEb vOSTOKOZh5I24ZMl8dQTTeZTuHN/MNGIwm/k6XAllGSG8x1A8u5OH9HelWOY0SXbhn5C 25DtywaNPL0OxZhD/RDTbg6QG+Ze5T6OA/WsuClqbkGLjMHlpe52zTj+f2e+vjS4pOJa 6w/faNJjD43hMevoG1oNc26d6drq6Qn04SwmuVyCjrCMTIxjcM5Jzh3nngvuSX12Pva7 xY+A== X-Received: by 10.68.219.42 with SMTP id pl10mr37220734pbc.154.1434258864470; Sat, 13 Jun 2015 22:14:24 -0700 (PDT) Received: from localhost.localdomain ([103.47.144.47]) by mx.google.com with ESMTPSA id pe3sm8184849pdb.55.2015.06.13.22.14.13 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 13 Jun 2015 22:14:23 -0700 (PDT) From: Caesar Wang To: heiko@sntech.de, khilman@linaro.org Cc: tomasz.figa@gmail.com, ulf.hansson@linaro.org, dmitry.torokhov@gmail.com, dianders@chromium.org, linux-rockchip@lists.infradead.org, Caesar Wang , "jinkun.hong" , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v15 1/4] dt-bindings: add document of Rockchip power domain Date: Sun, 14 Jun 2015 13:13:36 +0800 Message-Id: <1434258820-26779-2-git-send-email-wxt@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1434258820-26779-1-git-send-email-wxt@rock-chips.com> References: <1434258820-26779-1-git-send-email-wxt@rock-chips.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This add the necessary binding documentation for the power domain found on Rockchip Socs. Signed-off-by: jinkun.hong Signed-off-by: Caesar Wang --- Changes in v15: None Changes in v9: - add document decription. Series-changes:8 - document go back to v2. Series-changes:3 - DT structure has changed. Series-changes:2 - move clocks to "optional". .../bindings/soc/rockchip/power_domain.txt | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/rockchip/power_domain.txt diff --git a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt new file mode 100644 index 0000000..3e74e6d --- /dev/null +++ b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt @@ -0,0 +1,48 @@ +* Rockchip Power Domains + +Rockchip processors include support for multiple power domains which can be +powered up/down by software based on different application scenes to save power. + +Required properties for power domain controller: +- compatible: should be one of the following. + * rockchip,rk3288-power-controller - for rk3288 type power domain. +- #power-domain-cells: Number of cells in a power-domain specifier. + should be 1. +- rockchip,pmu: phandle referencing a syscon providing the pmu registers +- #address-cells: should be 1. +- #size-cells: should be 0. + +Required properties for power domain sub nodes: +- reg: index of the power domain, should use macros in: + * include/dt-bindings/power-domain/rk3288.h - for rk3288 type power domain. +- clocks (optional): phandles to clocks which need to be enabled while power domain + switches state. + +Example: + + power: power-controller { + compatible = "rockchip,rk3288-power-controller"; + #power-domain-cells = <1>; + rockchip,pmu = <&pmu>; + #address-cells = <1>; + #size-cells = <0>; + + pd_gpu { + reg = ; + clocks = <&cru ACLK_GPU>; + }; + }; + +Node of a device using power domains must have a power-domains property, +containing a phandle to the power device node and an index specifying which +power domain to use. +The index should use macros in: + * include/dt-bindings/power-domain/rk3288.h - for rk3288 type power domain. + +Example of the node using power domain: + + node { + /* ... */ + power-domains = <&power RK3288_PD_GPU>; + /* ... */ + };