From d8000beef2cd10c16dc5f66af715f692f5992652 Mon Sep 17 00:00:00 2001 From: Manuel Lauss Date: Sat, 3 Apr 2010 17:07:03 +0200 Subject: [PATCH] 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 To: Linux-MIPS Patchwork: http://patchwork.linux-mips.org/patch/1092/ Signed-off-by: Ralf Baechle --- arch/mips/alchemy/devboards/db1200/setup.c | 40 ------------------------------ 1 file changed, 40 deletions(-) diff --git a/arch/mips/alchemy/devboards/db1200/setup.c b/arch/mips/alchemy/devboards/db1200/setup.c index 379536e..be7e92e 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); -- 2.7.4