From 0aa366f351d044703e25c8425e508170e80d83b1 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Fri, 20 Jul 2007 11:22:30 -0700 Subject: [IA64] Convert to generic timekeeping/clocksource This is a merge of Peter Keilty's initial patch (which was revived by Bob Picco) for this with Hidetoshi Seto's fixes and scaling improvements. Acked-by: Bob Picco Signed-off-by: Tony Luck --- arch/ia64/sn/kernel/sn2/timer.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) (limited to 'arch/ia64/sn/kernel') diff --git a/arch/ia64/sn/kernel/sn2/timer.c b/arch/ia64/sn/kernel/sn2/timer.c index 56a88b6df4b..19e25d2b64f 100644 --- a/arch/ia64/sn/kernel/sn2/timer.c +++ b/arch/ia64/sn/kernel/sn2/timer.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include @@ -22,11 +23,21 @@ extern unsigned long sn_rtc_cycles_per_second; -static struct time_interpolator sn2_interpolator = { - .drift = -1, - .shift = 10, - .mask = (1LL << 55) - 1, - .source = TIME_SOURCE_MMIO64 +static void __iomem *sn2_mc; + +static cycle_t read_sn2(void) +{ + return (cycle_t)readq(sn2_mc); +} + +static struct clocksource clocksource_sn2 = { + .name = "sn2_rtc", + .rating = 300, + .read = read_sn2, + .mask = (1LL << 55) - 1, + .mult = 0, + .shift = 10, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; /* @@ -47,9 +58,11 @@ ia64_sn_udelay (unsigned long usecs) void __init sn_timer_init(void) { - sn2_interpolator.frequency = sn_rtc_cycles_per_second; - sn2_interpolator.addr = RTC_COUNTER_ADDR; - register_time_interpolator(&sn2_interpolator); + sn2_mc = RTC_COUNTER_ADDR; + clocksource_sn2.fsys_mmio = RTC_COUNTER_ADDR; + clocksource_sn2.mult = clocksource_hz2mult(sn_rtc_cycles_per_second, + clocksource_sn2.shift); + clocksource_register(&clocksource_sn2); ia64_udelay = &ia64_sn_udelay; } -- cgit v1.2.3