IIC support?

[M. Warner Losh]

In message: <45EC2667.9040004 at bulinfo.net>
            Krassimir Slavchev <krassi at bulinfo.net> writes:
: Warner Losh wrote:
: >> I have problems to access the iic eeprom from userland. Even after set 
: >> SCAN_IICBUS in iicbus.c nothing has been detected. I have made some 
: >> tests from the bootloader to read/write from/to the eeprom and they work.
: >> Is there any known problems with TWI or any differences between board 
: >> settings?
: >>     
: >
: > The IIC bus is not a self enumerating bus.  Bad things happen when you
: > go out and try to 'probe' it, although often you can get away with
: > that.  FreeBSD takes a conservative approach.  You need hints for each
: > iic device on bus that you have on your board.
: >
: >   
: Ok, that was just for testing.
: 
: I am trying to write a driver for pcf8563 (RTC similar to ds1672) but 
: when I call the iicbus_transfer() function the iicbus_transfer_gen() is 
: called instead of at91_twi_transfer().
: In the kernel config file I have:
: ...
: device   at91_twi
: device   iicbus
: ...
: 
: Is this correct or I miss something else?

Should be correct.  What version of FreeBSD are you using?

Warner