Hi Daniel,
> Is there a chance that you have test hardware available with the
> w83792d chip where you could try to run the same commands that I did?
>
Yes, I have a board on hand; it's a C version chip.
> First of all, what does a dump look like in your case?
>
> i2cdump -y 0 0x2c
>
[root at oapcsh00279 proc]# i2cdump -y 0 0x2f
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10: 00 00 64 64 ad 00 00 78 00 ff 00 00 d5 00 e2 b3 ..dd?..x....?.??
20: be be d0 c9 5c a3 d1 25 7f ff ff d7 a5 b5 83 ff ????\??%?..????.
30: 00 ff 00 ff 00 ff 00 ff 00 7f 00 ff ff ff aa b5 .........?....??
40: 01 00 00 00 00 ff ff 72 2f 12 73 84 01 ff 80 5c ?......r/?s??.?\
50: ff ff ff ff ff ff ff ff 7a 60 ff 77 77 01 05 7f ........z`.ww???
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
80: 01 8f 01 8f 00 00 00 00 11 11 ff ff 3c 3c 0a 0a ????....??..<<??
90: 00 00 00 01 8f ff 00 00 11 ff 3c 00 00 01 07 ff ...??...?.<..??.
a0: 01 01 01 8f 8f 8f 8f ff c4 02 00 00 ff ff 00 00 ???????.??......
b0: cc c0 ff ff ff 00 ff 00 ff ff ff ff ff ff ff ff ??..............
c0: 23 00 00 4b 00 50 00 ff 0e 00 00 4b 00 50 00 ff #..K.P..?..K.P..
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: 8b 8b 8b 28 3c 50 28 3c 50 28 3c 50 ff ff ff ff ???(<P(<P(<P....
f0: ff ff 80 ff 00 01 00 04 ff 02 ff 00 00 00 00 ff ..?..?.?.?......
> Then, what happens if you try to reset the EN_SMI bit?
>
> i2cset -y 0 0x2c 0x40 0x1
> i2cdump -y 0 0x2c
The value of 0x40 is 0x1 now, so I run commands below.
[root at oapcsh00279 proc]# i2cset -y 0 0x2f 0x40 0x3
No size specified (using byte-data access)
Value 0x03 written, readback matched
[root at oapcsh00279 proc]# i2cset -y 0 0x2f 0x40 0x7
No size specified (using byte-data access)
Value 0x07 written, readback matched
[root at oapcsh00279 proc]# i2cdump -y 0 0x2f
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10: 00 00 64 64 ad 00 00 78 00 ff 00 00 d5 00 e2 b3 ..dd?..x....?.??
20: be be d0 c9 5c a3 d1 25 7f ff ff d7 a5 b5 83 ff ????\??%?..????.
30: 00 ff 00 ff 00 ff 00 ff 00 7f 00 ff ff ff ba b9 .........?....??
40: 07 00 00 00 00 ff ff 72 2f 12 73 84 01 ff 80 5c ?......r/?s??.?\
50: ff ff ff ff ff ff ff ff 7a 60 ff 77 77 01 05 7f ........z`.ww???
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
80: 01 8f 01 8f 00 00 00 00 11 11 ff ff 3c 3c 0a 0a ????....??..<<??
90: 00 00 00 01 8f ff 00 00 11 ff 3c 00 00 01 07 ff ...??...?.<..??.
a0: 01 01 01 8f 8f 8f 8f ff c4 02 00 00 ff ff 00 00 ???????.??......
b0: cd c0 ff ff ff 00 ff 00 ff ff ff ff ff ff ff ff ??..............
c0: 23 80 00 4b 00 50 00 ff 0e 80 00 4b 00 50 00 ff #?.K.P..??.K.P..
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: 8b 8b 8b 28 3c 50 28 3c 50 28 3c 50 ff ff ff ff ???(<P(<P(<P....
f0: ff ff 80 ff 00 01 00 04 ff 02 ff 00 00 00 00 ff ..?..?.?.?......
[root at oapcsh00279 proc]# i2cset -y 0 0x2f 0x40 0x1
No size specified (using byte-data access)
Value 0x01 written, readback matched
[root at oapcsh00279 proc]# i2cdump -y 0 0x2f
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10: 00 00 64 64 ad 00 00 78 00 ff 00 00 d5 00 e2 b3 ..dd?..x....?.??
20: be be d0 c9 5c a3 d1 25 7f ff ff d7 a5 b5 83 ff ????\??%?..????.
30: 00 ff 00 ff 00 ff 00 ff 00 7f 00 ff ff ff 6a b9 .........?....j?
40: 01 00 00 00 00 ff ff 72 2f 12 73 84 01 ff 80 5c ?......r/?s??.?\
50: ff ff ff ff ff ff ff ff 7a 60 ff 77 77 01 05 7f ........z`.ww???
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
80: 01 8f 01 8f 00 00 00 00 11 11 ff ff 3c 3c 0a 0a ????....??..<<??
90: 00 00 00 01 8f ff 00 00 11 ff 3c 00 00 01 07 ff ...??...?.<..??.
a0: 01 01 01 8f 8f 8f 8f ff c4 02 00 00 ff ff 00 00 ???????.??......
b0: cc c0 ff ff ff 00 ff 00 ff ff ff ff ff ff ff ff ??..............
c0: 25 00 00 4b 00 50 00 ff 0e 80 00 4b 00 50 00 ff %..K.P..??.K.P..
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: 8b 8b 8b 28 3c 50 28 3c 50 28 3c 50 ff ff ff ff ???(<P(<P(<P....
f0: ff ff 80 ff 00 01 00 04 ff 02 ff 00 00 00 00 ff ..?..?.?.?......
> Finally, what happens if you re-init the chip?
>
> i2cset -y 0 0x2c 0x40 0x80
> i2cdump -y 0 0x2c
>
[root at oapcsh00279 proc]# i2cset -y 0 0x2f 0x40 0x80
No size specified (using byte-data access)
Warning - data mismatch - wrote 0x80, read back 0x01
[root at oapcsh00279 proc]# i2cdump -y 0 0x2f
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10: 00 00 64 64 ad 00 00 78 00 ff 00 00 d5 00 e2 b3 ..dd?..x....?.??
20: be be d0 c9 5c a3 d1 25 fe ff ff d7 a5 b5 83 ff ????\??%?..????.
30: 00 ff 00 ff 00 ff 00 ff 00 7f 00 ff ff ff ba b5 .........?....??
40: 01 02 00 00 00 ff ff 11 2f 12 73 84 01 ff 80 5c ??.....?/?s??.?\
50: ff ff ff ff ff ff ff ff 7a 60 ff 11 11 01 05 7f ........z`.?????
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
80: 01 8f 01 8f 00 00 00 00 11 11 ff ff 3c 3c 0a 0a ????....??..<<??
90: 00 00 00 01 8f ff 00 00 11 ff 3c 00 00 01 01 ff ...??...?.<..??.
a0: 01 01 01 8f 8f 8f 8f ff c4 02 00 00 ff ff 00 00 ???????.??......
b0: cc c0 ff ff ff 00 ff 00 ff ff ff ff ff ff ff ff ??..............
c0: 23 80 00 4b 00 50 00 ff 0f 80 00 4b 00 50 00 ff #?.K.P..??.K.P..
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: 8b 8b 8b 28 3c 50 28 3c 50 28 3c 50 ff ff ff ff ???(<P(<P(<P....
f0: ff ff 80 ff 00 01 00 04 ff 02 ff 00 00 00 00 ff ..?..?.?.?......
Best Regards
Yuan Mu
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