From 61d73044fe4cb8b9b50fa2a612cb4492b9db43cd Mon Sep 17 00:00:00 2001 From: James Hogan Date: Tue, 4 Mar 2014 10:23:57 +0000 Subject: MIPS: c-r4k: Add CPU PM callback for coherency Implement a CPU power management callback for the r4k cache, to set up coherency again after leaving a powered down state. Signed-off-by: James Hogan Signed-off-by: Paul Burton --- arch/mips/mm/c-r4k.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 1c74a6ad072a..a2a71c5f3ff4 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -7,6 +7,7 @@ * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Ralf Baechle (ralf@gnu.org) * Copyright (C) 1999, 2000 Silicon Graphics, Inc. */ +#include #include #include #include @@ -1644,3 +1645,26 @@ void r4k_cache_init(void) coherency_setup(); board_cache_error_setup = r4k_cache_error_setup; } + +static int r4k_cache_pm_notifier(struct notifier_block *self, unsigned long cmd, + void *v) +{ + switch (cmd) { + case CPU_PM_ENTER_FAILED: + case CPU_PM_EXIT: + coherency_setup(); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block r4k_cache_pm_notifier_block = { + .notifier_call = r4k_cache_pm_notifier, +}; + +int __init r4k_cache_init_pm(void) +{ + return cpu_pm_register_notifier(&r4k_cache_pm_notifier_block); +} +arch_initcall(r4k_cache_init_pm); -- cgit v1.2.3-55-g7522