libata-acpi: add ata port runtime D3Cold support

ATA port may support runtime D3Cold state, for example, Zero-power ODD case.
This patch adds wakeup notifier and enable/disable run_wake during
supend/resume.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 88561029cca8..1784cb30e7cf 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -795,6 +795,7 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
                 *d_min_p = d_min;
         return d_max;
 }
+EXPORT_SYMBOL(acpi_pm_device_sleep_state);
 #endif /* CONFIG_PM */
 
 #ifdef CONFIG_PM_SLEEP
@@ -831,6 +832,7 @@ int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
 
         return 0;
 }
+EXPORT_SYMBOL(acpi_pm_device_run_wake);
 
 /**
  *      acpi_pm_device_sleep_wake - enable or disable the system wake-up