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| author | David Brownell <david-b@pacbell.net> | 2007-05-08 00:34:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:18 -0700 |
| commit | f5f72b46c349fefcfd4421b2213c6ffb324c5e56 (patch) | |
| tree | 9ad2ac0eb4504399aad8f2a9a9e72ae8103e2e53 /drivers/acpi/glue.c | |
| parent | 87ac84f42a7a580d0dd72ae31d6a5eb4bfe04c6d (diff) | |
| download | linux-f5f72b46c349fefcfd4421b2213c6ffb324c5e56.tar.gz linux-f5f72b46c349fefcfd4421b2213c6ffb324c5e56.tar.bz2 linux-f5f72b46c349fefcfd4421b2213c6ffb324c5e56.zip | |
ACPI wakeup hooks for rtc-cmos
Remove /proc/acpi/alarm file when the rtc-cmos "wakealarm" file is available.
Instead, provide hooks that rtc-cmos will use.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/acpi/glue.c')
| -rw-r--r-- | drivers/acpi/glue.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index 4334c208841a..83768e9cf296 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -245,6 +245,35 @@ arch_initcall(init_acpi_device_notify); #if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) +#ifdef CONFIG_PM +static u32 rtc_handler(void *context) +{ + acpi_clear_event(ACPI_EVENT_RTC); + acpi_disable_event(ACPI_EVENT_RTC, 0); + return ACPI_INTERRUPT_HANDLED; +} + +static inline void rtc_wake_setup(void) +{ + acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); +} + +static void rtc_wake_on(struct device *dev) +{ + acpi_clear_event(ACPI_EVENT_RTC); + acpi_enable_event(ACPI_EVENT_RTC, 0); +} + +static void rtc_wake_off(struct device *dev) +{ + acpi_disable_event(ACPI_EVENT_RTC, 0); +} +#else +#define rtc_wake_setup() do{}while(0) +#define rtc_wake_on NULL +#define rtc_wake_off NULL +#endif + /* Every ACPI platform has a mc146818 compatible "cmos rtc". Here we find * its device node and pass extra config data. This helps its driver use * capabilities that the now-obsolete mc146818 didn't have, and informs it @@ -283,11 +312,17 @@ static int __init acpi_rtc_init(void) struct device *dev = get_rtc_dev(); if (dev) { + rtc_wake_setup(); + rtc_info.wake_on = rtc_wake_on; + rtc_info.wake_off = rtc_wake_off; + rtc_info.rtc_day_alarm = acpi_gbl_FADT.day_alarm; rtc_info.rtc_mon_alarm = acpi_gbl_FADT.month_alarm; rtc_info.rtc_century = acpi_gbl_FADT.century; - /* NOTE: acpi_gbl_FADT->rtcs4 is NOT currently useful */ + /* NOTE: S4_RTC_WAKE is NOT currently useful to Linux */ + if (acpi_gbl_FADT.flags & ACPI_FADT_S4_RTC_WAKE) + printk("ACPI: RTC can wake from S4\n"); dev->platform_data = &rtc_info; |