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Blackfin arch: fix bug - sometimes there is no response to the hitting key in uboot for bf561-ezkit when running with 50mhz SCLK

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use 10 delays rather than 7

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2008-10-08 14:46:09 +08:00 committed by Bryan Wu
parent 5c64e0d510
commit fffe53bee7
1 changed files with 3 additions and 3 deletions
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6
arch/blackfin/kernel/reboot.c
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@ -34,15 +34,15 @@ void bfin_reset(void)
bfin_write_SWRST(0x7); bfin_write_SWRST(0x7);
/* Due to the way reset is handled in the hardware, we need /* Due to the way reset is handled in the hardware, we need
* to delay for 7 SCLKS. The only reliable way to do this is * to delay for 10 SCLKS. The only reliable way to do this is
* to calculate the CCLK/SCLK ratio and multiply 7. For now, * to calculate the CCLK/SCLK ratio and multiply 10. For now,
* we'll assume worse case which is a 1:15 ratio. * we'll assume worse case which is a 1:15 ratio.
*/ */
asm( asm(
"LSETUP (1f, 1f) LC0 = %0\n" "LSETUP (1f, 1f) LC0 = %0\n"
"1: nop;" "1: nop;"
: :
: "a" (15 * 7) : "a" (15 * 10)
: "LC0", "LB0", "LT0" : "LC0", "LB0", "LT0"
); );