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authorStephen Warren <swarren@wwwdotorg.org>2013-03-27 17:06:41 +0000
committerTom Rini <trini@ti.com>2013-04-02 16:23:34 -0400
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tree63d9c4c16a314239d8d6ab359854d37bc867da93 /README
parentb343bbb528249391335cf35ca10c8822310cd815 (diff)
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README: document the requirements for CONFIG_SYS_HZ
CONFIG_SYS_HZ must be 1000, and get_timer() must therefore return ms. Document this. README text provided by Tom Rini. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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@@ -496,6 +496,13 @@ The following options need to be configured:
exists, unlike the similar options in the Linux kernel. Do not
set these options unless they apply!
+- CPU timer options:
+ CONFIG_SYS_HZ
+
+ The frequency of the timer returned by get_timer().
+ get_timer() must operate in milliseconds and this CONFIG
+ option must be set to 1000.
+
- Linux Kernel Interface:
CONFIG_CLOCKS_IN_MHZ