i.MX6ULLRM: OCOTP General purpose banks and words messed

[lategoodbye]

Hi,

i noticed that the bank 8 in the headline (p. 2432, chapter 37.5.72, reference manual IMX6ULLRM rev 1, 11/2017) is definitely wrong. I think it should be bank 7.

But more confusingly, the U-Boot fuse command from U-Boot 2016.03-imx_v2016.03_4.1.15_2.0.0_ga+g0ec2a01 behaves different to the reference manual (Bank 7 and 8 have only 4 words per bank).

=> fuse read 7 0
Reading bank 7:

Word 0x00000000: 00000000
=> fuse read 7 1
Reading bank 7:

Word 0x00000001: 00000000
=> fuse read 7 2
Reading bank 7:

Word 0x00000002: 00000000
=> fuse read 7 3
Reading bank 7:

Word 0x00000003: 00000000
=> fuse read 7 4
Reading bank 7:

Word 0x00000004:mxc_ocotp fuse_read(): Invalid argument on 6ULL
ERROR
=> fuse read 8 0
Reading bank 8:

Word 0x00000000: 00000000
=> fuse read 8 1
Reading bank 8:

Word 0x00000001: 00000000
=> fuse read 8 2
Reading bank 8:

Word 0x00000002: 00000000
=> fuse read 8 3
Reading bank 8:

Word 0x00000003: 00000000
=> fuse read 8 4
Reading bank 8:

Word 0x00000004:mxc_ocotp fuse_read(): Invalid argument on 6ULL
ERROR‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[igorpadykov]

Hi Stefan

i.MX6ULL  have 128bits for GP3/4 according to Table 5-9. Fusemap Descriptions

i.MX6ULL Reference Manual, compared to 512 for these fuses in i.MX6UL

http://www.nxp.com/docs/en/reference-manual/IMX6ULLRM.pdf 

uboot decoding can be found in uboot ../drivers/misc/mxc_ocotp.c
u-boot-fslc/mxc_ocotp.c at 2017.03+fslc · Freescale/u-boot-fslc · GitHub 

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------