Issues About PF100 Probe Failed On MX6S

[tony_l_cai]

Hi,All

       I found PF100 probed failed in Uboot 2013, the log is following :

Display: Hannstar-XGA (1024x768)

In:    serial

Out:   serial

Err:   serial

force_idle_bus: sda=0 scl=0 sda.gp=0x6 scl.gp=0x5

force_idle_bus: failed to clear bus, sda=0 scl=0

wait_for_sr_state: failed sr=81 cr=a0 state=2020

i2c_init_transfer: failed for chip 0x8 retry=0

wait_for_sr_state: failed sr=81 cr=a0 state=2020

i2c_init_transfer: failed for chip 0x8 retry=1

wait_for_sr_state: failed sr=81 cr=a0 state=2020

i2c_init_transfer: failed for chip 0x8 retry=2

i2c_init_transfer: give up i2c_regs=021a8000

How to debug? Or have some patches?

Thank you~

[igorpadykov]

Hi Tony

one can check if SION bit is set in IOMUX i2c pad settings,

then attach oscilloscope and check signals with it.

Also may be recommended to try standalone SDK i2c test.

Best regards

igor

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