From patchwork Mon Jan 26 16:16:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 5710831 X-Patchwork-Delegate: geert@linux-m68k.org 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 D0ACE9F4DC for ; Mon, 26 Jan 2015 16:16:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4C35F201EC for ; Mon, 26 Jan 2015 16:16:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D7FC32013D for ; Mon, 26 Jan 2015 16:16:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756206AbbAZQQe (ORCPT ); Mon, 26 Jan 2015 11:16:34 -0500 Received: from laurent.telenet-ops.be ([195.130.137.89]:46239 "EHLO laurent.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756186AbbAZQQd (ORCPT ); Mon, 26 Jan 2015 11:16:33 -0500 Received: from ayla.of.borg ([84.193.93.87]) by laurent.telenet-ops.be with bizsmtp id kgGH1p00R1t5w8s01gGHSw; Mon, 26 Jan 2015 17:16:29 +0100 Received: from ramsan.of.borg ([192.168.97.29] helo=ramsan) by ayla.of.borg with esmtp (Exim 4.82) (envelope-from ) id 1YFmKm-0005YL-Ko; Mon, 26 Jan 2015 17:16:16 +0100 Received: from geert by ramsan with local (Exim 4.82) (envelope-from ) id 1YFmKp-0005J9-3Z; Mon, 26 Jan 2015 17:16:19 +0100 From: Geert Uytterhoeven To: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Grant Likely , Arnd Bergmann , Kevin Hilman , Ulf Hansson , "Rafael J. Wysocki" , Felipe Balbi Cc: Olof Johansson , Simon Horman , Magnus Damm , Greg Kroah-Hartman , devicetree@vger.kernel.org, linux-sh@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v4 3/5] drivers: bus: Add Simple Power-Managed Bus DT Bindings Date: Mon, 26 Jan 2015 17:16:15 +0100 Message-Id: <1422288977-20353-4-git-send-email-geert+renesas@glider.be> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1422288977-20353-1-git-send-email-geert+renesas@glider.be> References: <1422288977-20353-1-git-send-email-geert+renesas@glider.be> 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 Signed-off-by: Geert Uytterhoeven Tested-by: Ulrich Hecht --- v4: - Replace "simple-bus" by "simple-pm-bus", - Remove the "renesas,bsc" bindings. They will be specified in a separate document. v3: - Add Tested-by, - Document required properties inherited from "simple-bus", - Document required "reg" property for "renesas,bsc", - Move "ranges" before "reg" in the example, v2: - New. --- .../devicetree/bindings/bus/simple-pm-bus.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 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 0000000000000000..0415e93a816c5ac0 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/simple-pm-bus.txt @@ -0,0 +1,41 @@ +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. + +The bindings for the Simple Power-Managed Bus extend the bindings for +"simple-bus", as specified in ePAPR. + + +Required properties: + - compatible: Must contain at least "simple-pm-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. + + +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>; + };