diff options
| author | Magnus Damm <damm@opensource.se> | 2009-10-29 10:51:48 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-10-30 11:54:59 +0900 |
| commit | 49f42644fd01bc7bd9b6b0a080fee1a89dc66665 (patch) | |
| tree | 570a5cc04f260ecdb81eb4af5ab3000c8518aa7d | |
| parent | eb3118f652ea7751ecf6a7e467bb637895e3be3b (diff) | |
sh: Add notifiers chains for cpu/board code
This patch adds atomic notifier chains for pre/post
sleep events. Useful for cpu code and boards that
need to save and restore register state before and
after entering a sleep mode.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | arch/sh/include/asm/suspend.h | 11 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/shmobile/pm.c | 12 |
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h index 5c8ea28ff7a..d1cc5221645 100644 --- a/arch/sh/include/asm/suspend.h +++ b/arch/sh/include/asm/suspend.h @@ -2,6 +2,7 @@ #define _ASM_SH_SUSPEND_H #ifndef __ASSEMBLY__ +#include <linux/notifier.h> static inline int arch_prepare_suspend(void) { return 0; } #include <asm/ptrace.h> @@ -19,6 +20,16 @@ void sh_mobile_setup_cpuidle(void); static inline void sh_mobile_setup_cpuidle(void) {} #endif +/* notifier chains for pre/post sleep hooks */ +extern struct atomic_notifier_head sh_mobile_pre_sleep_notifier_list; +extern struct atomic_notifier_head sh_mobile_post_sleep_notifier_list; + +/* priority levels for notifiers */ +#define SH_MOBILE_SLEEP_BOARD 0 +#define SH_MOBILE_SLEEP_CPU 1 +#define SH_MOBILE_PRE(x) (x) +#define SH_MOBILE_POST(x) (-(x)) + #endif /* flags passed to assembly suspend code */ diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c index ee3c2aaf66f..7ebf8cf8924 100644 --- a/arch/sh/kernel/cpu/shmobile/pm.c +++ b/arch/sh/kernel/cpu/shmobile/pm.c @@ -17,6 +17,12 @@ #include <asm/uaccess.h> /* + * Notifier lists for pre/post sleep notification + */ +ATOMIC_NOTIFIER_HEAD(sh_mobile_pre_sleep_notifier_list); +ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list); + +/* * Sleep modes available on SuperH Mobile: * * Sleep mode is just plain "sleep" instruction @@ -44,8 +50,14 @@ void sh_mobile_call_standby(unsigned long mode) void *onchip_mem = (void *)ILRAM_BASE; void (*standby_onchip_mem)(unsigned long, unsigned long) = onchip_mem; + atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list, + mode, NULL); + /* Let assembly snippet in on-chip memory handle the rest */ standby_onchip_mem(mode, ILRAM_BASE); + + atomic_notifier_call_chain(&sh_mobile_post_sleep_notifier_list, + mode, NULL); } static int sh_pm_enter(suspend_state_t state) |