diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-11-29 01:03:35 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-12-29 12:35:55 +0000 |
| commit | 6cefe92f2991c2bcd8f3a16faa9f4e3c91be48f2 (patch) | |
| tree | 1c7d462d06d651137c9c823f049da77c58d0ee18 /arch/arm | |
| parent | e68f31f4520ea5d1ddbcaddb320ef0b4201eef3c (diff) | |
| download | linux-6cefe92f2991c2bcd8f3a16faa9f4e3c91be48f2.tar.bz2 | |
ARM: footbridge: add sched_clock implementation
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-footbridge/common.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-footbridge/dc21285-timer.c | 17 | ||||
| -rw-r--r-- | arch/arm/mach-footbridge/ebsa285.c | 1 |
3 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-footbridge/common.h b/arch/arm/mach-footbridge/common.h index 56607b3a773e..b911e5587ecf 100644 --- a/arch/arm/mach-footbridge/common.h +++ b/arch/arm/mach-footbridge/common.h @@ -10,3 +10,5 @@ extern void footbridge_init_irq(void); extern void isa_init_irq(unsigned int irq); extern void footbridge_restart(enum reboot_mode, const char *); + +extern void footbridge_sched_clock(void); diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c index 9ee78f7b4990..785e4199f9cd 100644 --- a/arch/arm/mach-footbridge/dc21285-timer.c +++ b/arch/arm/mach-footbridge/dc21285-timer.c @@ -9,6 +9,7 @@ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/sched_clock.h> #include <asm/irq.h> @@ -104,3 +105,19 @@ void __init footbridge_timer_init(void) ce->cpumask = cpumask_of(smp_processor_id()); clockevents_config_and_register(ce, mem_fclk_21285, 0x4, 0xffffff); } + +static u32 notrace footbridge_read_sched_clock(void) +{ + return ~*CSR_TIMER3_VALUE; +} + +void __init footbridge_sched_clock(void) +{ + unsigned rate = DIV_ROUND_CLOSEST(mem_fclk_21285, 16); + + *CSR_TIMER3_LOAD = 0; + *CSR_TIMER3_CLR = 0; + *CSR_TIMER3_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV16; + + setup_sched_clock(footbridge_read_sched_clock, 24, rate); +} diff --git a/arch/arm/mach-footbridge/ebsa285.c b/arch/arm/mach-footbridge/ebsa285.c index 1a7235fb52ac..3ff7a0c30a0f 100644 --- a/arch/arm/mach-footbridge/ebsa285.c +++ b/arch/arm/mach-footbridge/ebsa285.c @@ -104,6 +104,7 @@ MACHINE_START(EBSA285, "EBSA285") .video_start = 0x000a0000, .video_end = 0x000bffff, .map_io = footbridge_map_io, + .init_early = footbridge_sched_clock, .init_irq = footbridge_init_irq, .init_time = footbridge_timer_init, .restart = footbridge_restart, |