From patchwork Fri Mar 24 05:43:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Moritz Fischer X-Patchwork-Id: 9642291 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7848660327 for ; Fri, 24 Mar 2017 05:43:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5E94A2845C for ; Fri, 24 Mar 2017 05:43:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 526E128474; Fri, 24 Mar 2017 05:43:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D85DF2845C for ; Fri, 24 Mar 2017 05:43:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752264AbdCXFn6 (ORCPT ); Fri, 24 Mar 2017 01:43:58 -0400 Received: from mail.kernel.org ([198.145.29.136]:46732 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751477AbdCXFn5 (ORCPT ); Fri, 24 Mar 2017 01:43:57 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 56F302028D; Fri, 24 Mar 2017 05:43:55 +0000 (UTC) Received: from tyrael.amer.corp.natinst.com (207-114-172-147.static.twtelecom.net [207.114.172.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2B25B20279; Fri, 24 Mar 2017 05:43:54 +0000 (UTC) From: Moritz Fischer To: linux-fpga@vger.kernel.org Cc: robh+dt@kernel.org, mark.rutland@arm.com, gregkh@linuxfoundation.org, atull@kernel.org, Moritz Fischer , Michal Simek , =?UTF-8?q?S=C3=B6ren=20Brinkmann?= , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v4 1/2] doc: Add bindings document for Xilinx LogiCore PR Decoupler Date: Thu, 23 Mar 2017 22:43:35 -0700 Message-Id: <1490334216-31068-1-git-send-email-mdf@kernel.org> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds the binding documentation for the Xilinx LogiCORE PR Decoupler soft core. Signed-off-by: Moritz Fischer Signed-off-by: Michal Simek Acked-by: Alan Tull Cc: Sören Brinkmann Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org --- Changes from v3: - Addressed Michal's comments - Addressed Alan's Comments - Added Alan's Acked-by Changes from v2: - Added refence to generic fpga-region bindings - Fixed up reg property in example - Added fallback to "xlnx,pr-decoupler" without version Changes from v1: - Added clock names & clock to example - Merged some of the description from Michal's version --- .../bindings/fpga/xilinx-pr-decoupler.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt diff --git a/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt new file mode 100644 index 0000000..2c527ac --- /dev/null +++ b/Documentation/devicetree/bindings/fpga/xilinx-pr-decoupler.txt @@ -0,0 +1,35 @@ +Xilinx LogiCORE Partial Reconfig Decoupler Softcore + +The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more +decouplers / fpga bridges. +The controller can decouple/disable the bridges which prevents signal +changes from passing through the bridge. The controller can also +couple / enable the bridges which allows traffic to pass through the +bridge normally. + +The Driver supports only MMIO handling. A PR region can have multiple +PR Decouplers which can be handled independently or chained via decouple/ +decouple_status signals. + +Required properties: +- compatible : Should contain "xlnx,pr-decoupler-1.00" or "xlnx,pr-decoupler" +- regs : base address and size for decoupler module +- clocks : input clock to IP +- clock-names : should contain "aclk" + +Optional properties: +- bridge-enable : 0 if driver should disable bridge at startup + 1 if driver should enable bridge at startup + Default is to leave bridge in current state. + +See Documentation/devicetree/bindings/fpga/fpga-region.txt for generic bindings. + +Example: + fpga-bridge@100000450 { + compatible = "xlnx,pr-decoupler-1.00", + "xlnx-pr-decoupler"; + regs = <0x10000045 0x10>; + clocks = <&clkc 15>; + clock-names = "aclk"; + bridge-enable = <0>; + };