Difuse/u-boot
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ppc4xx: Fix i2c divisor calcularion for PPC4xx

Browse source 
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.

Signed-off-by: Jeffrey Mann <mannj@embeddedplanet.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Jeffrey Mann 2007-04-12 14:15:59 +02:00 committed by Stefan Roese
parent e8aac8e7bf
commit 2ad3aba01d
1 changed files with 1 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
cpu/ppc4xx/i2c.c
View file

@ -91,7 +91,6 @@ static void _i2c_bus_reset(void)
void i2c_init(int speed, int slaveadd)
{
sys_info_t sysInfo;
unsigned long freqOPB;
int val, divisor;
int bus;
@ -124,8 +123,7 @@ 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)