U-Boot Users:
This patch fixes changes the i2c_init(...) function to use the function get_OPB_freq() rather than calculating the OPB speed by sysInfo.freqPLB/sysInfo.pllOpbDiv. The get_OPB_freq() function is specific per processor. The prior method was not and so was calculating the wrong speed for some PPC4xx processors.
PATCH: * Fixes OPB Speed calculation used for initializing i2c in PPC4xx processors.
Signed-off-by: Jeffrey Mann mannj@embeddedplanet.com
--- old/cpu/ppc4xx/i2c.c 2007-04-06 11:46:35.000000000 -0400 +++ new/cpu/ppc4xx/i2c.c 2007-04-11 11:51:35.000000000 -0400 @@ -124,8 +124,7 @@ void i2c_init(int speed, int slaveadd)
/* Clock divide Register */ /* get OPB frequency */ - get_sys_info(&sysInfo); - freqOPB = sysInfo.freqPLB / sysInfo.pllOpbDiv; + freqOPB = get_OPB_freq(); /* set divisor according to freqOPB */ divisor = (freqOPB - 1) / 10000000; if (divisor == 0)