renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-18 18:23:53 +08:00
Code

ARM: imx: enable delaytimer on the imx timer

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

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Sebastian Andrzej Siewior 2014-01-22 12:35:44 +01:00 committed by Shawn Guo
parent 17626b7cfc
commit 1119c84aa3
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/arm/mach-imx/time.c
View File

@ -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);