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-Kernel driver w1_ds2438
-=======================
-
-Supported chips:
-  * Maxim DS2438 Smart Battery Monitor
-
-supported family codes:
-        W1_FAMILY_DS2438        0x26
-
-Author: Mariusz Bialonczyk <manio@skyboo.net>
-
-Description
------------
-
-The DS2438 chip provides several functions that are desirable to carry in
-a battery pack. It also has a 40 bytes of nonvolatile EEPROM.
-Because the ability of temperature, current and voltage measurement, the chip
-is also often used in weather stations and applications such as: rain gauge,
-wind speed/direction measuring, humidity sensing, etc.
-
-Current support is provided through the following sysfs files (all files
-except "iad" are readonly):
-
-"iad"
------
-This file controls the 'Current A/D Control Bit' (IAD) in the
-Status/Configuration Register.
-Writing a zero value will clear the IAD bit and disables the current
-measurements.
-Writing value "1" is setting the IAD bit (enables the measurements).
-The IAD bit is enabled by default in the DS2438.
-
-When writing to sysfs file bits 2-7 are ignored, so it's safe to write ASCII.
-An I/O error is returned when there is a problem setting the new value.
-
-"page0"
--------
-This file provides full 8 bytes of the chip Page 0 (00h).
-This page contains the most frequently accessed information of the DS2438.
-Internally when this file is read, the additional CRC byte is also obtained
-from the slave device. If it is correct, the 8 bytes page data are passed
-to userspace, otherwise an I/O error is returned.
-
-"temperature"
--------------
-Opening and reading this file initiates the CONVERT_T (temperature conversion)
-command of the chip, afterwards the temperature is read from the device
-registers and provided as an ASCII decimal value.
-
-Important: The returned value has to be divided by 256 to get a real
-temperature in degrees Celsius.
-
-"vad", "vdd"
-------------
-Opening and reading this file initiates the CONVERT_V (voltage conversion)
-command of the chip.
-
-Depending on a sysfs filename a different input for the A/D will be selected:
-vad: general purpose A/D input (VAD)
-vdd: battery input (VDD)
-
-After the voltage conversion the value is returned as decimal ASCII.
-Note: To get a volts the value has to be divided by 100.