From patchwork Thu Feb 26 06:22:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 5887931 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2274C9F39E for ; Thu, 26 Feb 2015 06:22:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3EC1720375 for ; Thu, 26 Feb 2015 06:22:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E75BA20386 for ; Thu, 26 Feb 2015 06:22:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753479AbbBZGWs (ORCPT ); Thu, 26 Feb 2015 01:22:48 -0500 Received: from kirsty.vergenet.net ([202.4.237.240]:46531 "EHLO kirsty.vergenet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753426AbbBZGWr (ORCPT ); Thu, 26 Feb 2015 01:22:47 -0500 Received: from ayumi.isobedori.kobe.vergenet.net (p8130-ipbfp1005kobeminato.hyogo.ocn.ne.jp [118.10.149.130]) by kirsty.vergenet.net (Postfix) with ESMTP id 56F8A2671CE; Thu, 26 Feb 2015 17:22:27 +1100 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id D2E56EDEC37; Thu, 26 Feb 2015 15:22:25 +0900 (JST) From: Simon Horman To: linux-sh@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Magnus Damm , Geert Uytterhoeven , Simon Horman Subject: [PATCH 3/5] drivers: bus: Add Simple Power-Managed Bus DT Bindings Date: Thu, 26 Feb 2015 15:22:22 +0900 Message-Id: <7e7c17f10484d3bad38ea4dddc98485a8a40e4aa.1424931637.git.horms+renesas@verge.net.au> X-Mailer: git-send-email 2.1.4 In-Reply-To: References: Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 From: Geert Uytterhoeven Signed-off-by: Geert Uytterhoeven Tested-by: Ulrich Hecht Reviewed-by: Kevin Hilman Signed-off-by: Simon Horman --- .../devicetree/bindings/bus/simple-pm-bus.txt | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/simple-pm-bus.txt diff --git a/Documentation/devicetree/bindings/bus/simple-pm-bus.txt b/Documentation/devicetree/bindings/bus/simple-pm-bus.txt new file mode 100644 index 0000000..d032237 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/simple-pm-bus.txt @@ -0,0 +1,44 @@ +Simple Power-Managed Bus +======================== + +A Simple Power-Managed Bus is a transparent bus that doesn't need a real +driver, as it's typically initialized by the boot loader. + +However, its bus controller is part of a PM domain, or under the control of a +functional clock. Hence, the bus controller's PM domain and/or clock must be +enabled for child devices connected to the bus (either on-SoC or externally) +to function. + +While "simple-pm-bus" follows the "simple-bus" set of properties, as specified +in ePAPR, it is not an extension of "simple-bus". + + +Required properties: + - compatible: Must contain at least "simple-pm-bus". + Must not contain "simple-bus". + It's recommended to let this be preceded by one or more + vendor-specific compatible values. + - #address-cells, #size-cells, ranges: Must describe the mapping between + parent address and child address spaces. + +Optional platform-specific properties for clock or PM domain control (at least +one of them is required): + - clocks: Must contain a reference to the functional clock(s), + - power-domains: Must contain a reference to the PM domain. +Please refer to the binding documentation for the clock and/or PM domain +providers for more details. + + +Example: + + bsc: bus@fec10000 { + compatible = "renesas,bsc-sh73a0", "renesas,bsc", + "simple-pm-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0 0x20000000>; + reg = <0xfec10000 0x400>; + interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&zb_clk>; + power-domains = <&pd_a4s>; + };