From: Linus Walleij <linus.wall...@linaro.org> The U300 can support timer-based delays, so implement this. Skips past jiffy calibration.
Signed-off-by: Linus Walleij <linus.wall...@linaro.org> --- arch/arm/mach-u300/timer.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm/mach-u300/timer.c b/arch/arm/mach-u300/timer.c index d9e7320..c3d3802 100644 --- a/arch/arm/mach-u300/timer.c +++ b/arch/arm/mach-u300/timer.c @@ -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 -- 1.7.11.3 _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss