From patchwork Mon Sep 22 15:42:43 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 392033 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 EE80514012C for ; Tue, 23 Sep 2014 01:43:43 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754093AbaIVPnc (ORCPT ); Mon, 22 Sep 2014 11:43:32 -0400 Received: from top.free-electrons.com ([176.31.233.9]:49818 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754340AbaIVPm4 (ORCPT ); Mon, 22 Sep 2014 11:42:56 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 08AA82DD6; Mon, 22 Sep 2014 17:42:56 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (col31-4-88-188-83-94.fbx.proxad.net [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id 1B83575E; Mon, 22 Sep 2014 17:42:55 +0200 (CEST) From: Boris BREZILLON To: Nicolas Ferre , Jean-Christophe Plagniol-Villard , Alexandre Belloni , Andrew Victor , Alessandro Zummo , rtc-linux@googlegroups.com, Samuel Ortiz , Lee Jones , Johan Hovold Cc: 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, Boris BREZILLON Subject: [PATCH v6 9/9] mfd: syscon: add Atmel GPBR DT bindings documention Date: Mon, 22 Sep 2014 17:42:43 +0200 Message-Id: <1411400563-570-10-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1411400563-570-1-git-send-email-boris.brezillon@free-electrons.com> References: <1411400563-570-1-git-send-email-boris.brezillon@free-electrons.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The GPBR block provides a set of battery-backed registers that can be used to save data which need to be kept when the system is powered down and VDD-core is maintained by an external battery. A typical usage is the RTT block (when used as an RTC) which needs one of those registers to save the current time. Signed-off-by: Boris BREZILLON Acked-by: Nicolas Ferre --- Documentation/devicetree/bindings/mfd/atmel,gpbr.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/atmel,gpbr.txt diff --git a/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt b/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt new file mode 100644 index 0000000..a285695 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt @@ -0,0 +1,15 @@ +* Device tree bindings for Atmel GPBR (General Purpose Backup Registers) + +The GPBR are a set of battery-backed registers. + +Required properties: +- compatible: "atmel,at91sam9260-gpbr", "syscon" +- reg: contains offset/length value of the GPBR memory + region. + +Example: + +gpbr: gpbr@fffffd50 { + compatible = "atmel,at91sam9260-gpbr", "syscon"; + reg = <0xfffffd50 0x10>; +};