i.MX ProcessorsのトピックRe: Read/Write fuse from user space

Read/Write fuse from user space

kunal_003 — Tue, 26 Jul 2022 10:30:22 GMT

Hi all,

We are using Yocto zeus and it seems the user space utility for reading and writing fuse registers are not present in new kernel. I found from Linux Reference manual, mention about nvmem sysfs entry and able to read/write using dd commands. However, I believe there would some proper method to do this. Can anyone share how to read/write fuse registers from user space in i.MX8MPlus SoC?

Regards,

Kunal

Re: Read/Write fuse from user space

joanxie — Mon, 01 Aug 2022 10:32:47 GMT

pls refer to my another similar topic

"https://community.nxp.com/t5/i-MX-Processors/How-to-read-write-OTP-fuse-register-in-imx8mp/td-p/1469976"

Re: Read/Write fuse from user space

kunal_003 — Tue, 02 Aug 2022 08:23:28 GMT

Hi @joanxie ,

I already referred this link, it uses hexdump and print like utilities. Aren't there any user-space utility by NXP?

Regards,

Kunal

Re: Read/Write fuse from user space

joanxie — Wed, 03 Aug 2022 03:44:15 GMT

the link I share also mentions uboot fuse command, you can use that

Re: Read/Write fuse from user space

kunal_003 — Fri, 05 Aug 2022 05:49:17 GMT

Hi @joanxie ,

Agree, u-boot provides fuse commands. However, I am looking for user space utility like "fsl_otp.c" , which I believe has been removed in latest L5.4 kernel.

Regards,

Kunal