From patchwork Fri Feb 26 15:48:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Hunter X-Patchwork-Id: 8439021 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 22A68C0553 for ; Fri, 26 Feb 2016 15:49:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1CBAE203C1 for ; Fri, 26 Feb 2016 15:49:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 19CC4203B1 for ; Fri, 26 Feb 2016 15:49:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933418AbcBZPtR (ORCPT ); Fri, 26 Feb 2016 10:49:17 -0500 Received: from hqemgate14.nvidia.com ([216.228.121.143]:15624 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753896AbcBZPtP (ORCPT ); Fri, 26 Feb 2016 10:49:15 -0500 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com id ; Fri, 26 Feb 2016 07:48:39 -0800 Received: from hqemhub03.nvidia.com ([172.20.150.15]) by hqnvupgp07.nvidia.com (PGP Universal service); Fri, 26 Feb 2016 07:48:08 -0800 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Fri, 26 Feb 2016 07:48:08 -0800 Received: from jonathanh-lm.nvidia.com (172.20.144.16) by hqemhub03.nvidia.com (172.20.150.15) with Microsoft SMTP Server (TLS) id 8.3.406.0; Fri, 26 Feb 2016 07:49:10 -0800 From: Jon Hunter To: Stephen Warren , Thierry Reding , Alexandre Courbot , "Rafael J. Wysocki" , Kevin Hilman , Ulf Hansson CC: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, Jon Hunter Subject: [PATCH V6 05/10] Documentation: DT: bindings: Add power domain info for NVIDIA PMC Date: Fri, 26 Feb 2016 15:48:39 +0000 Message-ID: <1456501724-28477-6-git-send-email-jonathanh@nvidia.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1456501724-28477-1-git-send-email-jonathanh@nvidia.com> References: <1456501724-28477-1-git-send-email-jonathanh@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add power-domain binding documentation for the NVIDIA PMC driver in order to support generic power-domains. Signed-off-by: Jon Hunter Acked-by: Rob Herring --- .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 61 ++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt index 53aa5496c5cf..0c383a9e720e 100644 --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt @@ -1,5 +1,7 @@ NVIDIA Tegra Power Management Controller (PMC) +== Power Management Controller Node == + The PMC block interacts with an external Power Management Unit. The PMC mostly controls the entry and exit of the system from different sleep modes. It provides power-gating controllers for SoC and CPU power-islands. @@ -70,6 +72,11 @@ Optional properties for hardware-triggered thermal reset (inside 'i2c-thermtrip' Defaults to 0. Valid values are described in section 12.5.2 "Pinmux Support" of the Tegra4 Technical Reference Manual. +Optional nodes: +- powergates : This node contains a hierarchy of power domain nodes, which + should match the powergates on the Tegra SoC. See "Powergate + Nodes" below. + Example: / SoC dts including file @@ -115,3 +122,57 @@ pmc@7000f400 { }; ... }; + + +== Powergate Nodes == + +Each of the powergate nodes represents a power-domain on the Tegra SoC +that can be power-gated by the PMC and should be named appropriately. + +Required properties: + - reg: Contains an integer value that identifies the PMC power-gate. + Please refer to the Tegra TRM for more details. The parent node + must contain the following two properties: + - #address-cells: Must be 1, + - #size-cells: Must be 0. + - clocks: Must contain an entry for each clock required by the PMC for + controlling a power-gate. See ../clocks/clock-bindings.txt for details. + - resets: Must contain an entry for each reset required by the PMC for + controlling a power-gate. See ../reset/reset.txt for details. + - #power-domain-cells: Must be 0. + +Example: + + pmc: pmc@0,7000e400 { + compatible = "nvidia,tegra210-pmc"; + reg = <0x0 0x7000e400 0x0 0x400>; + clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>; + clock-names = "pclk", "clk32k_in"; + + powergates { + #address-cells = <1>; + #size-cells = <0>; + + pd_audio: aud { + reg = ; + clocks = <&tegra_car TEGRA210_CLK_APE>, + <&tegra_car TEGRA210_CLK_APB2APE>; + resets = <&tegra_car 198>; + #power-domain-cells = <0>; + }; + }; + }; + + +== Powergate Clients == + +Hardware blocks belonging to a power domain should contain a "power-domains" +property that is a phandle pointing to the corresponding powergate node. + +Example: + + adma: adma@702e2000 { + ... + power-domains = <&pd_audio>; + ... + };