linux-kernel - [PATCH v3 3/7] libata-acpi: register/unregister device to/from power resource

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Date:	Wed, 28 Mar 2012 14:21:58 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Zhang Rui <rui.zhang@...el.com>, Jeff Garzik <jgarzik@...ox.com>,
	Alan Stern <stern@...land.harvard.edu>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Tejun Heo <tj@...nel.org>,
	Aaron Lu <aaron.lu@....com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-scsi@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-acpi <linux-acpi@...r.kernel.org>
Subject: [PATCH v3 3/7] libata-acpi: register/unregister device to/from power resource

Uses the interface introduced in earlier patch.

Signed-off-by: Lin Ming <ming.m.lin@...el.com>
---
 drivers/ata/libata-acpi.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index ba9382a..81ef0f5 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -1033,16 +1033,48 @@ static void ata_acpi_remove_pm_notifier(struct ata_device *dev)
 	}
 }
 
+static void ata_acpi_register_power_resource(struct ata_device *dev)
+{
+	struct scsi_device *sdev = dev->sdev;
+	acpi_handle handle;
+	struct device *device;
+
+	handle = ata_dev_acpi_handle(dev);
+	if (!handle)
+		return;
+
+	device = &sdev->sdev_gendev;
+
+	acpi_power_resource_register_device(device, handle);
+}
+
+static void ata_acpi_unregister_power_resource(struct ata_device *dev)
+{
+	struct scsi_device *sdev = dev->sdev;
+	acpi_handle handle;
+	struct device *device;
+
+	handle = ata_dev_acpi_handle(dev);
+	if (!handle)
+		return;
+
+	device = &sdev->sdev_gendev;
+
+	acpi_power_resource_unregister_device(device, handle);
+}
+
 void ata_acpi_bind(struct ata_device *dev)
 {
 	ata_acpi_bind_dock(dev);
 	ata_acpi_add_pm_notifier(dev);
+	ata_acpi_register_power_resource(dev);
 }
 
 void ata_acpi_unbind(struct ata_device *dev)
 {
 	ata_acpi_unbind_dock(dev);
 	ata_acpi_remove_pm_notifier(dev);
+	ata_acpi_unregister_power_resource(dev);
 }
 
 static int is_pci_ata(struct device *dev)
-- 
1.7.2.5

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