It is sometimes necessary to poll a register - until a
certain value is read - in atomic context. Introduce
a macro that allows one to specify the maximum number
of reads attempts and the number of microseconds to
delay between each read attempt.
Change-Id: Ice27e78cf4e156da9de00d58783c220bdbc758d3
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
(cherry picked from commit 7a35f5abde0192e72d4e7982411e376d8b898944)
It is sometimes necessary to poll a memory-mapped register until its
value satisfies some condition. Introduce a family of convenience macros
that do this. Tight-loop and sleeping versions are provided with and
without timeouts.
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
Change-Id: Ia7db00cbe60ded8b0ed9bbff264aaea0841da92a
(cherry picked from commit b3ed9c113825d4d55d24a77d006fa2cd21a361ef)
