[U-Boot] Porting TPM support (from Linux) to U-Boot

[Wolfgang Denk]

Dear Huewe.external at infineon.com,

In message <B2E5851D0F254D45B5019F4DD73497573D00647566 at mucse405.eu.infineon.com> you wrote:
>
> This setup works quite fine.
> But I'm almost sure that this is not the correct way to port a linux driver
>  to u-boot. ;)

There is no general, one-size-fits-all approach.

> Can you perhaps point me to some resources how to do it correctly?
> How would you start? And how would you split up the files?

This cannot be answered without seing the code. Submit your code as
patches, so it can be reviewed.

> Furthermore I have some related questions:
> -       Is U-Boot using a libc / can I use functions from the glibc/ulibc?
> Are there any constraints?

U-Boot is self-contained. It does not use any expternal libc, but
provides all needed functions itself (which is obviously only a small
subset of standard libc functionality).

> -       Is there an equivalent for jiffies in u-boot? Or rather what is the
>  correct way to handle timeouts?

Please use the U-Boot timer functions (udelay(), get_timer()).

> -       Is there an equivalent for be32_to_cpu ? (big endian to whatever en
> dianess the cpu uses) in u-boot?

We have be32_to_cpu(), or you could use ntohl().

Hm... why didn't you check this yourself?  All it takes is a "grep"
...

> "This email and any attachments are confidential and may be subject to lega
> l or some other professional privilege. They are intended solely for the at
...

Please omit such crap whewn posting to public mailing lists.


Best regards,

Wolfgang Denk

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