[U-Boot] [PATCH] README: document the requirements for CONFIG_SYS_HZ
Wolfgang Denk
wd at denx.de
Fri Mar 22 22:12:03 CET 2013
Dear Stephen,
In message <1363923692-12748-1-git-send-email-swarren at wwwdotorg.org> you wrote:
> CONFIG_SYS_HZ must be 1000, and get_timer() must therefore return mS.
> Document this.
"must return mS" ? "mS" means Milli-Siemens, which is a unit of
electric conductance and electric admittance. You mean "ms" =
milliseconds ...
> +- CPU timer options:
> + CONFIG_SYS_HZ
> +
> + The frequency of the timer returned by get_timer(). This value
> + MUST be 1000.
This is misleading, or even incorrect. If I read this, I would expect
that get_timer() returns 1000. Obviously, this is incorrect. Instead,
get_timer() returns timestamp information in millisecond resolution.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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