[PATCH 3/4] ACPI: battery: Refactor wakeup reasons in acpi_battery_update()

[Mario Limonciello <superm1@kernel.org>]

From: Mario Limonciello <mario.limonciello@amd.com>

Another reason to wake is to be introduced, so refactor the code
to make it easier to follow. Also introduce PM debug messages so
that it's more obvious when these wake events have occurred.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/acpi/battery.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index f21bfd02a26d1..72c8a509695e6 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -999,6 +999,22 @@ static void acpi_battery_quirks(struct acpi_battery *battery)
 	}
 }
 
+static inline bool acpi_battery_should_wake(struct acpi_battery *battery)
+{
+	if (battery->state & ACPI_BATTERY_STATE_CRITICAL) {
+		pm_pr_dbg("Waking due critical battery level");
+		return true;
+	}
+
+	if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
+	    battery->capacity_now <= battery->alarm) {
+		pm_pr_dbg("Waking due to battery alarm");
+		return true;
+	}
+
+	return false;
+}
+
 static int acpi_battery_update(struct acpi_battery *battery, bool resume)
 {
 	int result = acpi_battery_get_status(battery);
@@ -1038,13 +1054,7 @@ static int acpi_battery_update(struct acpi_battery *battery, bool resume)
 		return 0;
 	}
 
-	/*
-	 * Wakeup the system if battery is critical low
-	 * or lower than the alarm level
-	 */
-	if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
-	    (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
-	     (battery->capacity_now <= battery->alarm)))
+	if (acpi_battery_should_wake(battery))
 		acpi_pm_wakeup_event(&battery->device->dev);
 
 	return result;
-- 
2.43.0