Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756842AbbEUQoZ (ORCPT ); Thu, 21 May 2015 12:44:25 -0400 Received: from mail-wg0-f54.google.com ([74.125.82.54]:33948 "EHLO mail-wg0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756734AbbEUQoU (ORCPT ); Thu, 21 May 2015 12:44:20 -0400 From: Srinivas Kandagatla To: linux-arm-kernel@lists.infradead.org Cc: Maxime Ripard , Rob Herring , Kumar Gala , Mark Brown , s.hauer@pengutronix.de, 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 , pantelis.antoniou@konsulko.com, mporter@konsulko.com Subject: [PATCH v5 06/11] nvmem: Add bindings for simple nvmem framework Date: Thu, 21 May 2015 17:44:12 +0100 Message-Id: <1432226652-8947-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1432226535-8640-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1432226535-8640-1-git-send-email-srinivas.kandagatla@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3180 Lines: 109 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 | 84 +++++++++++++++++++++++ 1 file changed, 84 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..ecea654 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nvmem.txt @@ -0,0 +1,84 @@ += NVMEM Data Device Tree Bindings = + +This binding is intended to represent the location of hardware +configuration data stored in NVMEMs. + +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 +to 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 then 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 + +Optional-properties: +nvmem : list of phandles to nvmem providers. +nvmem-names: names for the each nvmem provider. + +For example: + + tsens { + ... + nvmem-cell = <&tsens_calibration>; + nvmem-cell-names = "calibration"; + }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/