cvs commit: src/sys/dev/pcf pcf_ebus.c

[Marius Strobl]

marius      2004-06-10 21:56:53 UTC

  FreeBSD src repository

  Added files:
    sys/dev/pcf          pcf_ebus.c 
  Log:
  Add a first version of a pcf(4) front-end for the Sun i2c devices ("i2c"
  is the actual name here) on EBus and which are PCF8584 (on systems having
  a boot-bus controller the i2c are said to not be a PCF8584). Similar to the
  SUNW,envctrl devices, onboard slaves for monitoring fans, temperatures and
  such hang off of these i2c devices. But there's also stuff like EEPROMs
  housing the hostid of the system and the boards usally have a connector to
  add custom slave devices (on CP1500 there's actually a second PCF8584 with
  its own I2C bus for these).
  This driver already works fine but I'm not yet sure if access to the slave
  devices on CP1400/CP1500 marked as "reserved for factory use" in the docs
  should be blocked (most likely these are the voltage controllers wich aren't
  meant to be controller by software and even not by the firmware). Once the
  issues with polled mode are fixed in the common pcf(4) part in pcf.c, this
  front-end should probably honour the poll-mode property of the i2c devices.
  Tested on Ultra AXe and CP1500 (Netra t1 100).
  
  OK'ed by:       joerg, nsouch
  
  Revision  Changes    Path
  1.1       +261 -0    src/sys/dev/pcf/pcf_ebus.c (new)