|Kernel driver adm1025
| * Analog Devices ADM1025, ADM1025A
| Prefix: 'adm1025'
| Addresses scanned: I2C 0x2c - 0x2e
| Datasheet: Publicly available at the Analog Devices website
| * Philips NE1619
| Prefix: 'ne1619'
| Addresses scanned: I2C 0x2c - 0x2d
| Datasheet: Publicly available at the Philips website
|The NE1619 presents some differences with the original ADM1025:
| * Only two possible addresses (0x2c - 0x2d).
| * No temperature offset register, but we don't use it anyway.
| * No INT mode for pin 16. We don't play with it anyway.
| Chen-Yuan Wu <email@example.com>,
| Jean Delvare <firstname.lastname@example.org>
|(This is from Analog Devices.) The ADM1025 is a complete system hardware
|monitor for microprocessor-based systems, providing measurement and limit
|comparison of various system parameters. Five voltage measurement inputs
|are provided, for monitoring +2.5V, +3.3V, +5V and +12V power supplies and
|the processor core voltage. The ADM1025 can monitor a sixth power-supply
|voltage by measuring its own VCC. One input (two pins) is dedicated to a
|remote temperature-sensing diode and an on-chip temperature sensor allows
|ambient temperature to be monitored.
|One specificity of this chip is that the pin 11 can be hardwired in two
|different manners. It can act as the +12V power-supply voltage analog
|input, or as the a fifth digital entry for the VID reading (bit 4). It's
|kind of strange since both are useful, and the reason for designing the
|chip that way is obscure at least to me. The bit 5 of the configuration
|register can be used to define how the chip is hardwired. Please note that
|it is not a choice you have to make as the user. The choice was already
|made by your motherboard's maker. If the configuration bit isn't set
|properly, you'll have a wrong +12V reading or a wrong VID reading. The way
|the driver handles that is to preserve this bit through the initialization
|process, assuming that the BIOS set it up properly beforehand. If it turns
|out not to be true in some cases, we'll provide a module parameter to force
|This driver also supports the ADM1025A, which differs from the ADM1025
|only in that it has "open-drain VID inputs while the ADM1025 has on-chip
|100k pull-ups on the VID inputs". It doesn't make any difference for us.