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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-11-29 01:03:35 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-12-29 12:35:55 +0000
commit6cefe92f2991c2bcd8f3a16faa9f4e3c91be48f2 (patch)
tree1c7d462d06d651137c9c823f049da77c58d0ee18 /arch/arm
parente68f31f4520ea5d1ddbcaddb320ef0b4201eef3c (diff)
downloadlinux-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.h2
-rw-r--r--arch/arm/mach-footbridge/dc21285-timer.c17
-rw-r--r--arch/arm/mach-footbridge/ebsa285.c1
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,