From f064a20dded807448669426c9bfb7d03aba5659c Mon Sep 17 00:00:00 2001 From: Aaron Lu Date: Tue, 15 Jan 2013 17:20:59 +0800 Subject: libata: move acpi notification code to zpodd Since the ata acpi notification code introduced in commit 3bd46600a7a7e938c54df8cdbac9910668c7dfb0 is solely for ZPODD, and we now have a dedicated place for it, move these code there. And the ata_acpi_add_pm_notifier code is changed a little bit in that it is now invoked when scsi device is not bound with ACPI yet, so the way to get the acpi handle is different with the previous version. And the ata_acpi_add/remove_pm_notifier is also simplified a little bit in that it doesn't check if the acpi_device for the handle exists or not as the odd_can_poweroff function already checked that. Signed-off-by: Aaron Lu Acked-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/libata-zpodd.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'drivers/ata/libata-zpodd.c') diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c index 27eed2f09a8..9a0d90d09d8 100644 --- a/drivers/ata/libata-zpodd.c +++ b/drivers/ata/libata-zpodd.c @@ -1,5 +1,7 @@ #include #include +#include +#include #include "libata.h" @@ -12,6 +14,10 @@ enum odd_mech_type { struct zpodd { enum odd_mech_type mech_type; /* init during probe, RO afterwards */ struct ata_device *dev; + + /* The following fields are synchronized by PM core. */ + bool from_notify; /* resumed as a result of + * acpi wake notification */ }; /* Per the spec, only slot type and drawer type ODD can be supported */ @@ -68,6 +74,32 @@ static bool odd_can_poweroff(struct ata_device *ata_dev) return acpi_device_can_poweroff(acpi_dev); } +static void zpodd_wake_dev(acpi_handle handle, u32 event, void *context) +{ + struct ata_device *ata_dev = context; + struct zpodd *zpodd = ata_dev->zpodd; + struct device *dev = &ata_dev->sdev->sdev_gendev; + + if (event == ACPI_NOTIFY_DEVICE_WAKE && ata_dev && + pm_runtime_suspended(dev)) { + zpodd->from_notify = true; + pm_runtime_resume(dev); + } +} + +static void ata_acpi_add_pm_notifier(struct ata_device *dev) +{ + acpi_handle handle = ata_dev_acpi_handle(dev); + acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + zpodd_wake_dev, dev); +} + +static void ata_acpi_remove_pm_notifier(struct ata_device *dev) +{ + acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->sdev->sdev_gendev); + acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, zpodd_wake_dev); +} + void zpodd_init(struct ata_device *dev) { enum odd_mech_type mech_type; @@ -89,12 +121,14 @@ void zpodd_init(struct ata_device *dev) zpodd->mech_type = mech_type; + ata_acpi_add_pm_notifier(dev); zpodd->dev = dev; dev->zpodd = zpodd; } void zpodd_exit(struct ata_device *dev) { + ata_acpi_remove_pm_notifier(dev); kfree(dev->zpodd); dev->zpodd = NULL; } -- cgit v1.2.3