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-rw-r--r--arch/arm/plat-versatile/sched-clock.c29
1 files changed, 6 insertions, 23 deletions
diff --git a/arch/arm/plat-versatile/sched-clock.c b/arch/arm/plat-versatile/sched-clock.c
index 3d6a4c292cab..b33b74c87232 100644
--- a/arch/arm/plat-versatile/sched-clock.c
+++ b/arch/arm/plat-versatile/sched-clock.c
@@ -18,41 +18,24 @@
18 * along with this program; if not, write to the Free Software 18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */ 20 */
21#include <linux/kernel.h>
21#include <linux/io.h> 22#include <linux/io.h>
22#include <linux/sched.h>
23 23
24#include <asm/sched_clock.h> 24#include <asm/sched_clock.h>
25#include <plat/sched_clock.h> 25#include <plat/sched_clock.h>
26 26
27static DEFINE_CLOCK_DATA(cd);
28static void __iomem *ctr; 27static void __iomem *ctr;
29 28
30/* 29static u32 notrace versatile_read_sched_clock(void)
31 * Constants generated by clocks_calc_mult_shift(m, s, 24MHz, NSEC_PER_SEC, 60).
32 * This gives a resolution of about 41ns and a wrap period of about 178s.
33 */
34#define SC_MULT 2796202667u
35#define SC_SHIFT 26
36
37unsigned long long notrace sched_clock(void)
38{ 30{
39 if (ctr) { 31 if (ctr)
40 u32 cyc = readl(ctr); 32 return readl(ctr);
41 return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0,
42 SC_MULT, SC_SHIFT);
43 } else
44 return 0;
45}
46 33
47static void notrace versatile_update_sched_clock(void) 34 return 0;
48{
49 u32 cyc = readl(ctr);
50 update_sched_clock(&cd, cyc, (u32)~0);
51} 35}
52 36
53void __init versatile_sched_clock_init(void __iomem *reg, unsigned long rate) 37void __init versatile_sched_clock_init(void __iomem *reg, unsigned long rate)
54{ 38{
55 ctr = reg; 39 ctr = reg;
56 init_fixed_sched_clock(&cd, versatile_update_sched_clock, 40 setup_sched_clock(versatile_read_sched_clock, 32, rate);
57 32, rate, SC_MULT, SC_SHIFT);
58} 41}