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Commit 3c96d8ea authored by Linus Walleij's avatar Linus Walleij
Browse files

ARM: u300: enable delaytimer on the U300 



The U300 can support timer-based delays, so implement this.
Skips past jiffy calibration.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent f722406f

arch/arm/mach-u300/timer.c

+11 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/clk.h>

#include <linux/err.h>

#include <linux/irq.h>

#include <linux/delay.h>



#include <mach/hardware.h>

#include <mach/irqs.h>
@@ -345,6 +346,12 @@ static u32 notrace u300_read_sched_clock(void) 
	return readl(U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2CC);

}



static unsigned long u300_read_current_timer(void)

{

	return readl(U300_TIMER_APP_VBASE + U300_TIMER_APP_GPT2CC);

}



static struct delay_timer u300_delay_timer;



/*

 * This sets up the system timers, clock source and clock event.
@@ -362,6 +369,10 @@ void __init u300_timer_init(void) 


	setup_sched_clock(u300_read_sched_clock, 32, rate);



	u300_delay_timer.read_current_timer = &u300_read_current_timer;

	u300_delay_timer.freq = rate;

	register_current_timer_delay(&u300_delay_timer);



	/*

	 * Disable the "OS" and "DD" timers - these are designed for Symbian!

	 * Example usage in cnh1601578 cpu subsystem pd_timer_app.c