diff options
author | Linus Walleij <linus.walleij@stericsson.com> | 2010-07-19 23:55:46 +0400 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-22 12:23:27 +0400 |
commit | 4bd48940190a34fe5a78a1595ec7756edf36b18a (patch) | |
tree | ab59d7b63b5dfa7c4838aefb102e8c946f2458ca | |
parent | cd5b8f8755a89a57fc8c408d284b8b613f090345 (diff) | |
download | linux-4bd48940190a34fe5a78a1595ec7756edf36b18a.tar.xz |
ARM: 6234/1: move SPEAr to use common mult/shift calculation code
Since the infrastructure for determining shift/mult values from a
clock rate and a minimum programmable rate is now in the kernel,
lets remove this custom code.
Cc: Viresh KUMAR <viresh.kumar@st.com>
Tested-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r-- | arch/arm/plat-spear/time.c | 47 |
1 files changed, 7 insertions, 40 deletions
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c index a1025d38f383..ab211652e4ca 100644 --- a/arch/arm/plat-spear/time.c +++ b/arch/arm/plat-spear/time.c @@ -58,6 +58,11 @@ #define INT_STATUS 0x1 +/* + * Minimum clocksource/clockevent timer range in seconds + */ +#define SPEAR_MIN_RANGE 4 + static __iomem void *gpt_base; static struct clk *gpt_clk; @@ -66,44 +71,6 @@ static void clockevent_set_mode(enum clock_event_mode mode, static int clockevent_next_event(unsigned long evt, struct clock_event_device *clk_event_dev); -/* - * Following clocksource_set_clock and clockevent_set_clock picked - * from arch/mips/kernel/time.c - */ - -void __init clocksource_set_clock(struct clocksource *cs, unsigned int clock) -{ - u64 temp; - u32 shift; - - /* Find a shift value */ - for (shift = 32; shift > 0; shift--) { - temp = (u64) NSEC_PER_SEC << shift; - do_div(temp, clock); - if ((temp >> 32) == 0) - break; - } - cs->shift = shift; - cs->mult = (u32) temp; -} - -void __init clockevent_set_clock(struct clock_event_device *cd, - unsigned int clock) -{ - u64 temp; - u32 shift; - - /* Find a shift value */ - for (shift = 32; shift > 0; shift--) { - temp = (u64) clock << shift; - do_div(temp, NSEC_PER_SEC); - if ((temp >> 32) == 0) - break; - } - cd->shift = shift; - cd->mult = (u32) temp; -} - static cycle_t clocksource_read_cycles(struct clocksource *cs) { return (cycle_t) readw(gpt_base + COUNT(CLKSRC)); @@ -138,7 +105,7 @@ static void spear_clocksource_init(void) val |= CTRL_ENABLE ; writew(val, gpt_base + CR(CLKSRC)); - clocksource_set_clock(&clksrc, tick_rate); + clocksource_calc_mult_shift(&clksrc, tick_rate, SPEAR_MIN_RANGE); /* register the clocksource */ clocksource_register(&clksrc); @@ -233,7 +200,7 @@ static void __init spear_clockevent_init(void) tick_rate = clk_get_rate(gpt_clk); tick_rate >>= CTRL_PRESCALER16; - clockevent_set_clock(&clkevt, tick_rate); + clockevents_calc_mult_shift(&clkevt, tick_rate, SPEAR_MIN_RANGE); clkevt.max_delta_ns = clockevent_delta2ns(0xfff0, &clkevt); |