From patchwork Tue Mar 24 22:30:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 6086471 Return-Path: X-Original-To: patchwork-linux-arm-msm@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 967BE9F6E8 for ; Tue, 24 Mar 2015 22:30:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AE48F202EB for ; Tue, 24 Mar 2015 22:30:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A5D91202F8 for ; Tue, 24 Mar 2015 22:30:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753470AbbCXWam (ORCPT ); Tue, 24 Mar 2015 18:30:42 -0400 Received: from mail-wg0-f52.google.com ([74.125.82.52]:36786 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753442AbbCXWai (ORCPT ); Tue, 24 Mar 2015 18:30:38 -0400 Received: by wgra20 with SMTP id a20so6414993wgr.3 for ; Tue, 24 Mar 2015 15:30:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Nnzq55zdtbxsZs1jCIuegltUZAwHQRkTWWpPXJsPfsM=; b=I57du4ELrBdRSybh+QABsVCchDVt2rCYmNOTApBK1HBwry9nZyJi4VxLlXpETpvCKt F0qQL55vm+sHDWMhWnhqovql2+NGC5SpQUpslEooBb42rjmB10u/Iz6Ebs8Yom93+RMn /VGAjisgog01ZRtSS46MAHhqQF7fGAmV6Pi/kom82BLNiMefaTkTVrjFNbwJFuimx6sa 2xcRUSb8w6kAfOlR2NvHojrTBnrmnVrDqfWDz72agiIubbIksPaWAc2yC9srAdh7ockz 6gK5zjpBsRmNY0w/uLJ+/4dv7VRthQkw0QYCT9GvUWNSqkDldNaNEp9DULGVAnnUVx+q nBYQ== X-Gm-Message-State: ALoCoQkSBV6iuKB7E67b4j2Zg2bfFZZMFfCCxYdrl51BLxYA7ZVPBbCYRoeyRqHS7xMI2apABXG1 X-Received: by 10.194.76.146 with SMTP id k18mr12111680wjw.115.1427236236603; Tue, 24 Mar 2015 15:30:36 -0700 (PDT) Received: from srini-ThinkPad-X1-Carbon-2nd.dlink.com (host-2-99-228-8.as13285.net. [2.99.228.8]) by mx.google.com with ESMTPSA id kr5sm894580wjc.1.2015.03.24.15.30.33 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 24 Mar 2015 15:30:35 -0700 (PDT) From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org Cc: Maxime Ripard , Rob Herring , Kumar Gala , Mark Brown , Greg Kroah-Hartman , 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, Srinivas Kandagatla Subject: [PATCH v3 5/9] eeprom: Add bindings for simple eeprom framework Date: Tue, 24 Mar 2015 22:30:30 +0000 Message-Id: <1427236230-18751-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1427236116-18531-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1427236116-18531-1-git-send-email-srinivas.kandagatla@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 This patch adds bindings for simple eeprom framework which allows eeprom consumers to talk to eeprom providers to get access to eeprom cell data. Signed-off-by: Maxime Ripard [Maxime Ripard: intial version of eeprom framework] Signed-off-by: Srinivas Kandagatla --- .../devicetree/bindings/eeprom/eeprom.txt | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 Documentation/devicetree/bindings/eeprom/eeprom.txt diff --git a/Documentation/devicetree/bindings/eeprom/eeprom.txt b/Documentation/devicetree/bindings/eeprom/eeprom.txt new file mode 100644 index 0000000..8348d18 --- /dev/null +++ b/Documentation/devicetree/bindings/eeprom/eeprom.txt @@ -0,0 +1,70 @@ += EEPROM Data Device Tree Bindings = + +This binding is intended to represent the location of hardware +configuration data stored in EEPROMs. + +On a significant proportion of boards, the manufacturer has stored +some data on an EEPROM-like device, 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 +to this node. + += Data cells = +These are the child nodes of the provider which contain data cell +information like offset and size in eeprom provider. + +Required properties: +reg: specifies the offset in byte within that storage device, and the length + in bytes of the data we care about. + There could be more then one offset-length pairs in this property. + +Optional properties: +As required by specific data parsers/interpreters. + +For example: + + /* Provider */ + qfprom: qfprom@00700000 { + compatible = "qcom,qfprom"; + reg = <0x00700000 0x1000>; + ... + + /* Data cells */ + tsens_calibration: calib@404 { + reg = <0x404 0x10>; + }; + + serial_number: sn { + reg = <0x104 0x4>, <0x204 0x4>, <0x30c 0x4>; + + }; + ... + }; + += Data consumers = +Are device nodes which consume eeprom data cells. + +Required properties: + +eeproms: List of phandle and data cell the device might be interested in. + +Optional properties: + +eeprom-names: List of data cell name strings sorted in the same order + as the eeproms property. Consumers drivers will use + eeprom-names to differentiate between multiple cells, + and hence being able to know what these cells are for. + +For example: + + tsens { + ... + eeproms = <&tsens_calibration>; + eeprom-names = "calibration"; + };