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clocksource: scx200_hrt: Convert scx200 to use clocksource_register_hz 

Converts the scx200 clocksource to using clocksource_register_hz.

CC: Jim Cromie <jim.cromie@gmail.com>
Tested-by: Jim Cromie <jim.cromie@gmail.com>
Acked-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2012-01-09 16:15:03 -08:00
parent c7f798e372
commit 12d6d41276
1 changed files with 7 additions and 13 deletions
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20
drivers/clocksource/scx200_hrt.c
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@ -49,9 +49,6 @@ static cycle_t read_hrt(struct clocksource *cs)
return (cycle_t) inl(scx200_cb_base + SCx200_TIMER_OFFSET); return (cycle_t) inl(scx200_cb_base + SCx200_TIMER_OFFSET);
} }
#define HRT_SHIFT_1 22
#define HRT_SHIFT_27 26
static struct clocksource cs_hrt = { static struct clocksource cs_hrt = {
.name = "scx200_hrt", .name = "scx200_hrt",
.rating = 250, .rating = 250,
@ -63,6 +60,7 @@ static struct clocksource cs_hrt = {
static int __init init_hrt_clocksource(void) static int __init init_hrt_clocksource(void)
{ {
u32 freq;
/* Make sure scx200 has initialized the configuration block */ /* Make sure scx200 has initialized the configuration block */
if (!scx200_cb_present()) if (!scx200_cb_present())
return -ENODEV; return -ENODEV;
@ -79,19 +77,15 @@ static int __init init_hrt_clocksource(void)
outb(HR_TMEN | (mhz27 ? HR_TMCLKSEL : 0), outb(HR_TMEN | (mhz27 ? HR_TMCLKSEL : 0),
scx200_cb_base + SCx200_TMCNFG_OFFSET); scx200_cb_base + SCx200_TMCNFG_OFFSET);
if (mhz27) { freq = (HRT_FREQ + ppm);
cs_hrt.shift = HRT_SHIFT_27; if (mhz27)
cs_hrt.mult = clocksource_hz2mult((HRT_FREQ + ppm) * 27, freq *= 27;
cs_hrt.shift);
} else {
cs_hrt.shift = HRT_SHIFT_1;
cs_hrt.mult = clocksource_hz2mult(HRT_FREQ + ppm,
cs_hrt.shift);
}
pr_info("enabling scx200 high-res timer (%s MHz +%d ppm)\n", pr_info("enabling scx200 high-res timer (%s MHz +%d ppm)\n",
printk(KERN_INFO "enabling scx200 high-res timer (%s MHz +%d ppm)\n",
mhz27 ? "27":"1", ppm); mhz27 ? "27":"1", ppm);
return clocksource_register(&cs_hrt); return clocksource_register_hz(&cs_hrt, freq);
} }
module_init(init_hrt_clocksource); module_init(init_hrt_clocksource);