Support clock event source based on i.MX general purpose
timer in free running timer mode.
Signed-off-by: NPavel Pisa <pisa@cmp.felk.cvut.cz>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>