From 469d30448dad13600cdd246024f9db8e80614c45 Mon Sep 17 00:00:00 2001 From: Mikael Pettersson Date: Thu, 29 Oct 2009 11:46:54 -0700 Subject: iop: clockevent support This updates the IOP platform to expose the interrupting timer 0 as a clockevent object. The timer interrupt handler is changed to call the clockevent ->event_handler() instead of timer_tick(), and ->set_next_event() and ->set_mode() operations are added to allow the mode of the timer to be updated (required for ONESHOT/NOHZ mode). Timer 0 must now be properly initialised, which requires a new write_tcr0() function from the mach-specific code. The mode of timer 0 must be read at the start of ->set_mode(), which requires a new read_tmr0() function from the mach- specific code. Initial setup of timer 0 is also rewritten to be more robust. Tested on n2100, compile-tested for all plat-iop machines. Signed-off-by: Mikael Pettersson Signed-off-by: Dan Williams --- arch/arm/mach-iop13xx/include/mach/time.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/arm/mach-iop13xx') diff --git a/arch/arm/mach-iop13xx/include/mach/time.h b/arch/arm/mach-iop13xx/include/mach/time.h index 9fb2768c84bb..b2fb17b35423 100644 --- a/arch/arm/mach-iop13xx/include/mach/time.h +++ b/arch/arm/mach-iop13xx/include/mach/time.h @@ -66,6 +66,13 @@ static inline unsigned long iop13xx_xsi_bus_ratio(void) return 2; } +static inline u32 read_tmr0(void) +{ + u32 val; + asm volatile("mrc p6, 0, %0, c0, c9, 0" : "=r" (val)); + return val; +} + static inline void write_tmr0(u32 val) { asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (val)); @@ -83,6 +90,11 @@ static inline u32 read_tcr0(void) return val; } +static inline void write_tcr0(u32 val) +{ + asm volatile("mcr p6, 0, %0, c2, c9, 0" : : "r" (val)); +} + static inline u32 read_tcr1(void) { u32 val; -- cgit v1.2.3