Hi,
I tried to communicate with my customerized i2c device on my beagleboard xm i2c-2 bus, but I was always getting NACK error. And here are some registers dumped:
omap_i2c omap_i2c.1: fa070000: 00400040 001f001f 00000000 636f636f
omap_i2c omap_i2c.1: fa070010: 00010001 00000000 00020002 00030003
omap_i2c omap_i2c.1: fa070020: 02150215 92009200 00000000 004b004b
omap_i2c omap_i2c.1: fa070030: 00010001 11191119 070b070b 01e001e0
omap_i2c omap_i2c.1: fa070040: 00020002 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa070050: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa070060: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa070070: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa070080: 00400040 001f001f 00800080 636f636f
omap_i2c omap_i2c.1: fa070090: 00010001 00000000 00020002 00030003
omap_i2c omap_i2c.1: fa0700a0: 02150215 92009200 00000000 004b004b
omap_i2c omap_i2c.1: fa0700b0: 00010001 11191119 070b070b 01e001e0
omap_i2c omap_i2c.1: fa0700c0: 00020002 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa0700d0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa0700e0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.1: fa0700f0: 00000000 00000000 00000000 00000000
omap_device: omap_i2c.2: new worst case activate latency 0: 30517
omap_i2c omap_i2c.2: bus 2 rev4.0 at 100 kHz
omap_i2c omap_i2c.2: fa072000: 00400040 001f001f 00000000 00000000
omap_i2c omap_i2c.2: fa072010: 00010001 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa072020: 02150215 80008000 00000000 03ff03ff
omap_i2c omap_i2c.2: fa072030: 00010001 000d000d 000f000f 01e001e0
omap_i2c omap_i2c.2: fa072040: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa072050: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa072060: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa072070: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa072080: 00400040 001f001f 00800080 00000000
omap_i2c omap_i2c.2: fa072090: 00010001 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa0720a0: 02150215 80008000 00000000 03ff03ff
omap_i2c omap_i2c.2: fa0720b0: 00010001 000d000d 000f000f 01e001e0
omap_i2c omap_i2c.2: fa0720c0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa0720d0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa0720e0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.2: fa0720f0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.3: bus 3 rev4.0 at 100 kHz
omap_i2c omap_i2c.3: fa060000: 00400040 001f001f 00000000 00000000
omap_i2c omap_i2c.3: fa060010: 00010001 00000000 00000000 00830083
omap_i2c omap_i2c.3: fa060020: 02150215 80008000 00000000 03ff03ff
omap_i2c omap_i2c.3: fa060030: 00010001 000d000d 000f000f 01e001e0
omap_i2c omap_i2c.3: fa060040: c000c000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa060050: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa060060: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa060070: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa060080: 00400040 001f001f 00800080 00000000
omap_i2c omap_i2c.3: fa060090: 00010001 00000000 00000000 00830083
omap_i2c omap_i2c.3: fa0600a0: 02150215 80008000 00000000 03ff03ff
omap_i2c omap_i2c.3: fa0600b0: 00010001 000d000d 000f000f 01e001e0
omap_i2c omap_i2c.3: fa0600c0: c000c000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa0600d0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa0600e0: 00000000 00000000 00000000 00000000
omap_i2c omap_i2c.3: fa0600f0: 00000000 00000000 00000000 00000000
omap_device: omap_i2c.3: new worst case deactivate latency 0: 30517
Take a look into it and apparently the PSC settings of i2c-2 and i2c-3 are wrong. Could anyone tell me if there is any bugs inside current i2c-omap driver? Or if there is any patches/workaround for this issue?
Thanks in advance