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clocksource: sh_cmt: compute mult and shift before registration

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commit f4d7c3565c upstream.

Based on the sh_tmu change in 66f49121ff
("clocksource: sh_tmu: compute mult and shift before registration").
The same issues impact the sh_cmt driver, so we take the same approach
here.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Paul Mundt
2010-06-02 17:10:44 +09:00
committed by Greg Kroah-Hartman
parent a214985570
commit 478fc4e6d2
1 changed files with 12 additions and 9 deletions
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21
drivers/clocksource/sh_cmt.c
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@@ -413,18 +413,10 @@ static cycle_t sh_cmt_clocksource_read(struct clocksource *cs)
static int sh_cmt_clocksource_enable(struct clocksource *cs)
{
struct sh_cmt_priv *p = cs_to_sh_cmt(cs);
int ret;
p->total_cycles = 0;
ret = sh_cmt_start(p, FLAG_CLOCKSOURCE);
if (ret)
return ret;
/* TODO: calculate good shift from rate and counter bit width */
cs->shift = 0;
cs->mult = clocksource_hz2mult(p->rate, cs->shift);
return 0;
return sh_cmt_start(p, FLAG_CLOCKSOURCE);
}
static void sh_cmt_clocksource_disable(struct clocksource *cs)
@@ -451,7 +443,18 @@ static int sh_cmt_register_clocksource(struct sh_cmt_priv *p,
cs->resume = sh_cmt_clocksource_resume;
cs->mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
/* clk_get_rate() needs an enabled clock */
clk_enable(p->clk);
p->rate = clk_get_rate(p->clk) / (p->width == 16) ? 512 : 8;
clk_disable(p->clk);
/* TODO: calculate good shift from rate and counter bit width */
cs->shift = 10;
cs->mult = clocksource_hz2mult(p->rate, cs->shift);
pr_info("sh_cmt: %s used as clock source\n", cs->name);
clocksource_register(cs);
return 0;
}