diff options
| author | Kevin Hilman <khilman@deeprootsystems.com> | 2009-04-14 07:06:37 -0500 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-04-27 09:49:36 -0700 |
| commit | e60990023cac11bc6185e7a7f1007fbbb8d30e4d (patch) | |
| tree | 1756b42a1a632908068a1878db5054bf18b9c313 /arch | |
| parent | f5c122da543ebf98a5ccb3166768e38eea3120dd (diff) | |
davinci: timers: use clk_get_rate()
Use clock framework instead of hard-coded CLOCK_TICK_RATE for
determining timer tick frequencies.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-davinci/time.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c index 88864ae067b..494e01bff5c 100644 --- a/arch/arm/mach-davinci/time.c +++ b/arch/arm/mach-davinci/time.c @@ -31,6 +31,7 @@ #include "clock.h" static struct clock_event_device clockevent_davinci; +static unsigned int davinci_clock_tick_rate; #define DAVINCI_TIMER0_BASE (IO_PHYS + 0x21400) #define DAVINCI_TIMER1_BASE (IO_PHYS + 0x21800) @@ -282,7 +283,7 @@ static void davinci_set_mode(enum clock_event_mode mode, switch (mode) { case CLOCK_EVT_MODE_PERIODIC: - t->period = CLOCK_TICK_RATE / (HZ); + t->period = davinci_clock_tick_rate / (HZ); t->opts = TIMER_OPTS_PERIODIC; timer32_config(t); break; @@ -309,21 +310,29 @@ static struct clock_event_device clockevent_davinci = { static void __init davinci_timer_init(void) { + struct clk *timer_clk; + static char err[] __initdata = KERN_ERR "%s: can't register clocksource!\n"; /* init timer hw */ timer_init(); + timer_clk = clk_get(NULL, "timer0"); + BUG_ON(IS_ERR(timer_clk)); + clk_enable(timer_clk); + + davinci_clock_tick_rate = clk_get_rate(timer_clk); + /* setup clocksource */ clocksource_davinci.mult = - clocksource_khz2mult(CLOCK_TICK_RATE/1000, + clocksource_khz2mult(davinci_clock_tick_rate/1000, clocksource_davinci.shift); if (clocksource_register(&clocksource_davinci)) printk(err, clocksource_davinci.name); /* setup clockevent */ - clockevent_davinci.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, + clockevent_davinci.mult = div_sc(davinci_clock_tick_rate, NSEC_PER_SEC, clockevent_davinci.shift); clockevent_davinci.max_delta_ns = clockevent_delta2ns(0xfffffffe, &clockevent_davinci); @@ -343,6 +352,15 @@ struct sys_timer davinci_timer = { void davinci_watchdog_reset(void) { u32 tgcr, wdtcr; void __iomem *base = IO_ADDRESS(DAVINCI_WDOG_BASE); + struct device dev; + struct clk *wd_clk; + char *name = "watchdog"; + + dev_set_name(&dev, name); + wd_clk = clk_get(&dev, NULL); + if (WARN_ON(IS_ERR(wd_clk))) + return; + clk_enable(wd_clk); /* disable, internal clock source */ __raw_writel(0, base + TCR); |