From patchwork Mon Jun 22 23:08:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 50189 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-la0-f70.google.com (mail-la0-f70.google.com [209.85.215.70]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 8F9E021575 for ; Mon, 22 Jun 2015 23:09:34 +0000 (UTC) Received: by laka10 with SMTP id a10sf48924505lak.2 for ; Mon, 22 Jun 2015 16:09:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:sender:precedence:list-id :x-original-sender:x-original-authentication-results:mailing-list :list-post:list-help:list-archive:list-unsubscribe; bh=jnLhjxG4ATuH7mhtszrYn9j593J1A72pImGQ6TY7Ne0=; b=blbzaBcCpDdR9hYbE5/UWe8/CBfzY1iJ7ceyXPujvzkHsTEff6lOxLAyBPX7kMoLPj ojfyb/9QUvl8uWDR9tFBgHoUtuGO11RI/Yrw5pXKo1tIMn5HNvsa+9OL1rFXpQPZ+93t wXstiqzLC670IRUE0QA3WYGRGiEFoFtBI/BYFMAUxCN06hpRZSl0vGtEPq6Of9nj3tbb oiUuSswkPDlzYmlBjrAl3zdHuhm0X/eSgUfKJMKzJpgdHTy8Co/0faEkUukpKTRfKwTN K0PTPBcDj55DpNu1CbqruAh6Qt3cQ9mYea6q/8z7Dwq1Ak4p69HdDM/jQ1a8fB6pwcW6 4Zmw== X-Gm-Message-State: ALoCoQk+dLZXCvm41B2EkmssTPlfT5pURClapyXOKTzuUn19dDiGMY+JnZ+1cRHezUOLVPzglH00 X-Received: by 10.180.90.106 with SMTP id bv10mr17693221wib.6.1435014572976; Mon, 22 Jun 2015 16:09:32 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.152.6.73 with SMTP id y9ls830360lay.18.gmail; Mon, 22 Jun 2015 16:09:32 -0700 (PDT) X-Received: by 10.152.37.102 with SMTP id x6mr31964418laj.69.1435014572783; Mon, 22 Jun 2015 16:09:32 -0700 (PDT) Received: from mail-la0-f46.google.com (mail-la0-f46.google.com. [209.85.215.46]) by mx.google.com with ESMTPS id pt2si17761752lbb.46.2015.06.22.16.09.32 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Jun 2015 16:09:32 -0700 (PDT) Received-SPF: pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.215.46 as permitted sender) client-ip=209.85.215.46; Received: by laka10 with SMTP id a10so119176283lak.0 for ; Mon, 22 Jun 2015 16:09:32 -0700 (PDT) X-Received: by 10.112.220.7 with SMTP id ps7mr31902289lbc.72.1435014572676; Mon, 22 Jun 2015 16:09:32 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patch@linaro.org Received: by 10.112.108.230 with SMTP id hn6csp2688778lbb; Mon, 22 Jun 2015 16:09:31 -0700 (PDT) X-Received: by 10.68.198.101 with SMTP id jb5mr64158514pbc.84.1435014570843; Mon, 22 Jun 2015 16:09:30 -0700 (PDT) Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id ok4si31617926pab.221.2015.06.22.16.09.29; Mon, 22 Jun 2015 16:09:30 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932256AbbFVXJU (ORCPT + 30 others); Mon, 22 Jun 2015 19:09:20 -0400 Received: from mail-wi0-f172.google.com ([209.85.212.172]:38878 "EHLO mail-wi0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754316AbbFVXJE (ORCPT ); Mon, 22 Jun 2015 19:09:04 -0400 Received: by wibdq8 with SMTP id dq8so498581wib.1 for ; Mon, 22 Jun 2015 16:09:02 -0700 (PDT) X-Received: by 10.180.87.38 with SMTP id u6mr36335365wiz.43.1435014542872; Mon, 22 Jun 2015 16:09:02 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-2-98-208-65.as13285.net. [2.98.208.65]) by mx.google.com with ESMTPSA id q4sm32727186wja.24.2015.06.22.16.09.00 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 22 Jun 2015 16:09:02 -0700 (PDT) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman Cc: Maxime Ripard , Rob Herring , Kumar Gala , Mark Brown , s.hauer@pengutronix.de, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, arnd@arndb.de, sboyd@codeaurora.org, pantelis.antoniou@konsulko.com, mporter@konsulko.com, stefan.wahren@i2se.com, wxt@rock-chips.com, Srinivas Kandagatla Subject: [PATCH v6 4/9] nvmem: Add bindings for simple nvmem framework Date: Tue, 23 Jun 2015 00:08:58 +0100 Message-Id: <1435014538-26308-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1435014459-26138-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1435014459-26138-1-git-send-email-srinivas.kandagatla@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: srinivas.kandagatla@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.215.46 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , This patch adds bindings for simple nvmem framework which allows nvmem consumers to talk to nvmem providers to get access to nvmem cell data. Signed-off-by: Maxime Ripard [Maxime Ripard: intial version of eeprom framework] Signed-off-by: Srinivas Kandagatla --- Documentation/devicetree/bindings/nvmem/nvmem.txt | 85 +++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/nvmem.txt diff --git a/Documentation/devicetree/bindings/nvmem/nvmem.txt b/Documentation/devicetree/bindings/nvmem/nvmem.txt new file mode 100644 index 0000000..d1a37e7 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nvmem.txt @@ -0,0 +1,85 @@ += NVMEM(Non Volatile Memory) Data Device Tree Bindings = + +This binding is intended to represent the location of hardware +configuration data stored in NVMEMs like eeprom, efuses and so on. + +On a significant proportion of boards, the manufacturer has stored +some data on NVMEM, for the OS to be able to retrieve these information +and act upon it. Obviously, the OS has to know about where to retrieve +these data from, and where they are stored on the storage device. + +This document is here to document this. + += Data providers = +Contains bindings specific to provider drivers and data cells as children +of this node. + +Optional properties: + read-only: Mark the provider as read only. + += Data cells = +These are the child nodes of the provider which contain data cell +information like offset and size in nvmem provider. + +Required properties: +reg: specifies the offset in byte within that storage device, start bit + in the byte and the length in bits of the data we care about. + There could be more than one offset-length pairs in this property. + +Optional properties: + +bit-offset: specifies the offset in bit within the address range specified + by reg property. Can take values from 0-7. +nbits: specifies number of bits this cell occupies starting from bit-offset. + +For example: + + /* Provider */ + qfprom: qfprom@00700000 { + ... + + /* Data cells */ + tsens_calibration: calib@404 { + reg = <0x404 0x10>; + }; + + tsens_calibration_bckp: calib_bckp@504 { + reg = <0x504 0x11>; + bit-offset = 6; + nbits = 128; + }; + + pvs_version: pvs-version@6 { + reg = <0x6 0x2> + bit-offset = 7; + nbits = 2; + }; + + speed_bin: speed-bin@c{ + reg = <0xc 0x1>; + bit-offset = 2; + nbits = 3; + + }; + ... + }; + += Data consumers = +Are device nodes which consume nvmem data cells/providers. + +Required-properties: +nvmem-cell: list of phandle to the nvmem data cells. +nvmem-cell-names: names for the each nvmem-cell specified. Required if + nvmem-cell is used. + +Optional-properties: +nvmem : list of phandles to nvmem providers. +nvmem-names: names for the each nvmem provider. required if nvmem is used. + +For example: + + tsens { + ... + nvmem-cell = <&tsens_calibration>; + nvmem-cell-names = "calibration"; + };