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authorManuel Lauss <manuel.lauss@googlemail.com>2010-04-03 17:07:03 +0200
committerRalf Baechle <ralf@linux-mips.org>2010-04-12 17:26:22 +0100
commitd8000beef2cd10c16dc5f66af715f692f5992652 (patch)
tree3cbe44d00c9ba1e2a09b91514a20e1353089d38c /arch/mips
parent2844e49f5ea1ae75d2026ff128b145e3bd44134c (diff)
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>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/alchemy/devboards/db1200/setup.c40
1 files changed, 0 insertions, 40 deletions
diff --git a/arch/mips/alchemy/devboards/db1200/setup.c b/arch/mips/alchemy/devboards/db1200/setup.c
index 379536e3abd1..be7e92ea01f3 100644
--- a/arch/mips/alchemy/devboards/db1200/setup.c
+++ b/arch/mips/alchemy/devboards/db1200/setup.c
@@ -60,43 +60,6 @@ void __init board_setup(void)
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)
{
/* 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_EJECT_INT)->status |= IRQ_NOAUTOEN;
- if (cpu_wait)
- cpu_wait = db1200_wait;
-
return 0;
}
arch_initcall(db1200_arch_init);