[meta-freescale] [PATCH 0/1] arm: imx: fsl_otp: make fuses (OTP memory) read-only

Alexander Holler holler at ahsoftware.de
Fri Nov 7 01:43:34 PST 2014


Jon Nettleton made me aware that there is a driver which makes it very
easy to write to the OTP from userspace.

And I have to admit that I was mildly shocked.

Because OTP stands for One Time Programmable, it means the write
functionality of that driver can be used only once per HW and if that
is done wrong, the HW might be one of those famous electronic bricks

So I've quickly written a patch which makes this driver to a friendly
citizen instead of an heavily armed cowboy.

I really, really think this patch should be attached to all trees which
are including fsl_otp.c. It applies without any error to
imx_3.10.17_1.0.1_ga, imx_3.10.31_1.1.0_beta, linux-linaro-lsk-v3.14-mx6
and likely any other tree which includes that driver.


Alexander Holler

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