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authorMichal Simek <michal.simek@xilinx.com>2013-12-20 10:16:40 +0100
committerMichal Simek <michal.simek@xilinx.com>2014-01-27 11:25:46 +0100
commit839396ab88e4ac0107a88cb85fa59a7ec3f94416 (patch)
tree73c78182d9f4d2c8b48856e9f8e0d5bc792104a2 /arch/microblaze
parent0f7e36406cd1d519ebde736f86731695b1bb3eb7 (diff)
microblaze: timer: Use generic sched_clock implementation
Remove sched_clock from the driver and use sched_clock_register function. Inspired-by: "arch_timer: Move to generic sched_clock framework" (sha1: 65cd4f6c99c1170bd0114dbd71b978012ea44d28) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/Kconfig1
-rw-r--r--arch/microblaze/kernel/timer.c27
2 files changed, 9 insertions, 19 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index a715eeaf9959..c9f8bb4046d7 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -27,6 +27,7 @@ config MICROBLAZE
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select COMMON_CLK
+ select GENERIC_SCHED_CLOCK
select GENERIC_IDLE_POLL_SETUP
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS3
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index 55b19400951f..06609e01f1cf 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -12,12 +12,12 @@
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/sched.h>
+#include <linux/sched_clock.h>
#include <linux/clk.h>
#include <linux/clockchips.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <asm/cpuinfo.h>
-#include <linux/cnt32_to_63.h>
static void __iomem *timer_baseaddr;
@@ -167,10 +167,15 @@ static __init void xilinx_clockevent_init(void)
clockevents_register_device(&clockevent_xilinx_timer);
}
+static u64 xilinx_clock_read(void)
+{
+ return in_be32(timer_baseaddr + TCR1);
+}
+
static cycle_t xilinx_read(struct clocksource *cs)
{
/* reading actual value of timer 1 */
- return (cycle_t) (in_be32(timer_baseaddr + TCR1));
+ return (cycle_t)xilinx_clock_read();
}
static struct timecounter xilinx_tc = {
@@ -222,12 +227,6 @@ static int __init xilinx_clocksource_init(void)
return 0;
}
-/*
- * We have to protect accesses before timer initialization
- * and return 0 for sched_clock function below.
- */
-static int timer_initialized;
-
static void __init xilinx_timer_init(struct device_node *timer)
{
struct clk *clk;
@@ -273,18 +272,8 @@ static void __init xilinx_timer_init(struct device_node *timer)
#endif
xilinx_clocksource_init();
xilinx_clockevent_init();
- timer_initialized = 1;
-}
-
-unsigned long long notrace sched_clock(void)
-{
- if (timer_initialized) {
- struct clocksource *cs = &clocksource_microblaze;
- cycle_t cyc = cnt32_to_63(cs->read(NULL)) & LLONG_MAX;
- return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
- }
- return 0;
+ sched_clock_register(xilinx_clock_read, 32, timer_clock_freq);
}
CLOCKSOURCE_OF_DECLARE(xilinx_timer, "xlnx,xps-timer-1.00.a",