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MIPS: Alchemy: DB1200: Remove custom wait implementation 

While playing with the out-of-tree MAE driver module, the system would
panic after a while in the db1200 custom wait code after wakeup due to
a clobbered k0 register being used as target address of a store op.

Remove the custom wait implementation and revert back to the Alchemy-
recommended implementation already set as default.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/1092/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Manuel Lauss 2010-04-03 17:07:03 +02:00 committed by Ralf Baechle
parent 2844e49f5e
commit d8000beef2
1 changed files with 0 additions and 40 deletions
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40
arch/mips/alchemy/devboards/db1200/setup.c
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@ -60,43 +60,6 @@ void __init board_setup(void)
wmb(); wmb();
} }
/* use the hexleds to count the number of times the cpu has entered
* wait, the dots to indicate whether the CPU is currently idle or
* active (dots off = sleeping, dots on = working) for cases where
* the number doesn't change for a long(er) period of time.
*/
static void db1200_wait(void)
{
__asm__(" .set push \n"
" .set mips3 \n"
" .set noreorder \n"
" cache 0x14, 0(%0) \n"
" cache 0x14, 32(%0) \n"
" cache 0x14, 64(%0) \n"
/* dots off: we're about to call wait */
" lui $26, 0xb980 \n"
" ori $27, $0, 3 \n"
" sb $27, 0x18($26) \n"
" sync \n"
" nop \n"
" wait \n"
" nop \n"
" nop \n"
" nop \n"
" nop \n"
" nop \n"
/* dots on: there's work to do, increment cntr */
" lui $26, 0xb980 \n"
" sb $0, 0x18($26) \n"
" lui $26, 0xb9c0 \n"
" lb $27, 0($26) \n"
" addiu $27, $27, 1 \n"
" sb $27, 0($26) \n"
" sync \n"
" .set pop \n"
: : "r" (db1200_wait));
}
static int __init db1200_arch_init(void) static int __init db1200_arch_init(void)
{ {
/* GPIO7 is low-level triggered CPLD cascade */ /* GPIO7 is low-level triggered CPLD cascade */
@ -110,9 +73,6 @@ static int __init db1200_arch_init(void)
irq_to_desc(DB1200_SD0_INSERT_INT)->status |= IRQ_NOAUTOEN; irq_to_desc(DB1200_SD0_INSERT_INT)->status |= IRQ_NOAUTOEN;
irq_to_desc(DB1200_SD0_EJECT_INT)->status |= IRQ_NOAUTOEN; irq_to_desc(DB1200_SD0_EJECT_INT)->status |= IRQ_NOAUTOEN;
if (cpu_wait)
cpu_wait = db1200_wait;
return 0; return 0;
} }
arch_initcall(db1200_arch_init); arch_initcall(db1200_arch_init);