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>

1 files changed, 17 insertions, 2 deletions

diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index dcde9ddd105a..5a76e5be61d5 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -70,6 +70,14 @@ acpi_system_write_sleep(struct file *file,
 }
 #endif                          /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
 
+#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE)
+/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
+#else
+#define HAVE_ACPI_LEGACY_ALARM
+#endif
+
+#ifdef  HAVE_ACPI_LEGACY_ALARM
+
 static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
 {
         u32 sec, min, hr;
@@ -341,6 +349,8 @@ acpi_system_write_alarm(struct file *file,
       end:
         return_VALUE(result ? result : count);
 }
+#endif  /* HAVE_ACPI_LEGACY_ALARM */
+
 
 extern struct list_head acpi_wakeup_device_list;
 extern spinlock_t acpi_device_lock;
@@ -464,6 +474,7 @@ static const struct file_operations acpi_system_sleep_fops = {
 };
 #endif                          /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
 
+#ifdef  HAVE_ACPI_LEGACY_ALARM
 static const struct file_operations acpi_system_alarm_fops = {
         .open = acpi_system_alarm_open_fs,
         .read = seq_read,
@@ -479,8 +490,9 @@ static u32 rtc_handler(void *context)
 
         return ACPI_INTERRUPT_HANDLED;
 }
+#endif  /* HAVE_ACPI_LEGACY_ALARM */
 
-static int acpi_sleep_proc_init(void)
+static int __init acpi_sleep_proc_init(void)
 {
         struct proc_dir_entry *entry = NULL;
 
@@ -496,6 +508,7 @@ static int acpi_sleep_proc_init(void)
                 entry->proc_fops = &acpi_system_sleep_fops;
 #endif
 
+#ifdef  HAVE_ACPI_LEGACY_ALARM
         /* 'alarm' [R/W] */
         entry =
             create_proc_entry("alarm", S_IFREG | S_IRUGO | S_IWUSR,
@@ -503,6 +516,9 @@ static int acpi_sleep_proc_init(void)
         if (entry)
                 entry->proc_fops = &acpi_system_alarm_fops;
 
+        acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
+#endif  /* HAVE_ACPI_LEGACY_ALARM */
+
         /* 'wakeup device' [R/W] */
         entry =
             create_proc_entry("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
@@ -510,7 +526,6 @@ static int acpi_sleep_proc_init(void)
         if (entry)
                 entry->proc_fops = &acpi_system_wakeup_device_fops;
 
-        acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
         return 0;
 }