9317726de4
The macro spin_event_timeout() takes a condition and timeout value (in microseconds) as parameters. It spins until either the condition is true or the timeout expires. It returns the result of the condition when the loop was terminated. This primary purpose of this macro is to poll on a hardware register until a status bit changes. The timeout ensures that the loop still terminates if the bit doesn't change as expected. This macro makes it easier for driver developers to perform this kind of operation properly. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-by: Geoff Thorpe <Geoff.Thorpe@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
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