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Commit bbaa0670 authored by Rabin Vincent's avatar Rabin Vincent Committed by Daniel Lezcano
Browse files

clocksource/drivers/arm_global_timer: Register delay timer 



Provide a delay timer using the lower 32-bits of the global timer so
that we can use that instead of having to calibrating delays.

Signed-off-by: default avatarRabin Vincent <rabin.vincent@axis.com>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
parent 1b18fd20

drivers/clocksource/arm_global_timer.c

+17 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/clockchips.h>

#include <linux/cpu.h>

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/of.h>
@@ -221,6 +222,21 @@ static u64 notrace gt_sched_clock_read(void) 
}

#endif



static unsigned long gt_read_long(void)

{

	return readl_relaxed(gt_base + GT_COUNTER0);

}



static struct delay_timer gt_delay_timer = {

	.read_current_timer = gt_read_long,

};



static void __init gt_delay_timer_init(void)

{

	gt_delay_timer.freq = gt_clk_rate;

	register_current_timer_delay(&gt_delay_timer);

}



static void __init gt_clocksource_init(void)

{

	writel(0, gt_base + GT_CONTROL);
@@ -317,6 +333,7 @@ static void __init global_timer_of_register(struct device_node *np) 
	/* Immediately configure the timer on the boot CPU */

	gt_clocksource_init();

	gt_clockevents_init(this_cpu_ptr(gt_evt));

	gt_delay_timer_init();



	return;