Re: [U-Boot] PPC4XX Custom Board - Failing to read I2C

8 Apr 2013


      Sefan,
Thanks for the suggestion, I2C_BASE_ADDR is the same in both versions. After
doing some more digging, I can see why v2013.01.01 is not passing
i2c_transfer. The following routine yields different results in the 2
versions:
v2013.01.01-
   do {
            /* Get status */
            status = in_8(&i2c->sts);
            printf("gd_ do status->i = %x, status = %d, IIC_STS = %x\n", i,
status, &i2c->sts);
            udelay(10);
            i--;
        } while ((status & IIC_STS_PT) && !(status & IIC_STS_ERR) &&
             (i > 0));
Result: gd_ do status->i = 80, status = 4, IIC_STS = ef600408
v1.7.02-
   do {
            /* Get status */
            status = in_8((u8 *)IIC_STS);
            printf("gd_ do status->i = %d, status = %d, IIC_STS = %x\n", i,
status, IIC_STS);
            udelay(10);
            i--;
        } while ((status & IIC_STS_PT) && !(status & IIC_STS_ERR) && (i >
0));
Result: gd_ do status->i = 80, status = 40, IIC_STS = ef600408
So in v2013.01.01 (status & IIC_STS_ERR) == 1, versus a (status &
IIC_STS_ERR) == 0 in v1.7.02. Am I missing some sort of offset config
someplace? Once again, any help is greatly appreciated.
Thank you!
Greg
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Re: [U-Boot] PPC4XX Custom Board - Failing to read I2C

txcotrader