Commit 1119c84a authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Shawn Guo
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ARM: imx: enable delaytimer on the imx timer 



The imx can support timer-based delays, so implement this.
Skips past jiffy calibration.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent 17626b7c

arch/arm/mach-imx/time.c

+12 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/irq.h>

#include <linux/clockchips.h>

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/sched_clock.h>
@@ -116,11 +117,22 @@ static u64 notrace mxc_read_sched_clock(void) 
	return sched_clock_reg ? __raw_readl(sched_clock_reg) : 0;

}



static struct delay_timer imx_delay_timer;



static unsigned long imx_read_current_timer(void)

{

	return __raw_readl(sched_clock_reg);

}



static int __init mxc_clocksource_init(struct clk *timer_clk)

{

	unsigned int c = clk_get_rate(timer_clk);

	void __iomem *reg = timer_base + (timer_is_v2() ? V2_TCN : MX1_2_TCN);



	imx_delay_timer.read_current_timer = &imx_read_current_timer;

	imx_delay_timer.freq = c;

	register_current_timer_delay(&imx_delay_timer);



	sched_clock_reg = reg;



	sched_clock_register(mxc_read_sched_clock, 32, c);