From mboxrd@z Thu Jan 1 00:00:00 1970 From: srinivas.kandagatla@linaro.org (Srinivas Kandagatla) Date: Mon, 30 Mar 2015 22:57:59 +0100 Subject: [PATCH v4 05/10] eeprom: Add bindings for simple eeprom framework In-Reply-To: <1427752492-17039-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1427752492-17039-1-git-send-email-srinivas.kandagatla@linaro.org> Message-ID: <1427752679-17261-1-git-send-email-srinivas.kandagatla@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 | 58 ++++++++++++++++++++++ 1 file changed, 58 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..fb71d46 --- /dev/null +++ b/Documentation/devicetree/bindings/eeprom/eeprom.txt @@ -0,0 +1,58 @@ += 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 at 00700000 { + compatible = "qcom,qfprom"; + reg = <0x00700000 0x8000>; + ... + + /* Data cells */ + tsens_calibration: calib at 4404 { + reg = <0x4404 0x10>; + }; + + serial_number: sn { + reg = <0x104 0x4>, <0x204 0x4>, <0x30c 0x4>; + + }; + ... + }; + += Data consumers = +Are device nodes which consume eeprom data cells. + +For example: + + tsens { + ... + calibration = <&tsens_calibration>; + }; -- 1.9.1