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sh: heartbeat double 0 fix.

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This implements stricter and more compliant knightrider strobing in the
heartbeat handler. While there still seems to be some debate as to
whether the double 0 is "more" correct or not, this updated version
appears to have general consensus. Fixes a long-term "bug".

Signed-off-by: Takashi YOSHII <takashi.yoshii.ze@hitachi.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Takashi YOSHII 2007-03-12 15:33:22 +09:00 committed by Paul Mundt
parent f987fc880d
commit f6072896e3
1 changed files with 3 additions and 10 deletions
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13
arch/sh/drivers/heartbeat.c
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@ -40,16 +40,9 @@ static void heartbeat_timer(unsigned long data)
static unsigned bit = 0, up = 1;
ctrl_outw(1 << hd->bit_pos[bit], (unsigned long)hd->base);
if (up)
if (bit == (ARRAY_SIZE(hd->bit_pos) - 1)) {
bit--;
up = 0;
} else
bit++;
else if (bit == 0)
up = 1;
else
bit--;
bit += up;
if ((bit == 0) || (bit == ARRAY_SIZE(hd->bit_pos)-1))
up = -up;
mod_timer(&hd->timer, jiffies + (110 - ((300 << FSHIFT) /
((avenrun[0] / 5) + (3 << FSHIFT)))));