tree 1361a00a2d8d7a282be4e6c529539ecd8acabc70
parent ce04a9020c41a2ebf1d85e01532da69d2d2e2119
author Simon Glass <sjg@chromium.org> 1594341794 -0600
committer Bin Meng <bmeng.cn@gmail.com> 1594967544 +0800

timer: Allow delays with a 32-bit microsecond timer

The current get_timer_us() uses 64-bit arithmetic on 32-bit machines.
When implementing microsecond-level timeouts, 32-bits is plenty. Add a
new function that uses an unsigned long. On 64-bit machines this is
still 64-bit, but this doesn't introduce a penalty. On 32-bit machines
it is more efficient.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>