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authorAlan Stern <stern@rowland.harvard.edu>2006-10-30 17:07:51 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-12-01 14:23:30 -0800
commit692a186c9d5f12d43cef28d40c25247dc4f302f0 (patch)
tree8271b7930fbabfd6b6d5cc0a3b42e65ea56976d4 /drivers/usb/core
parentaf4f76066d0fcb215ae389b8839d7ae37ce0e28b (diff)
USB: expand autosuspend/autoresume API
This patch (as814) adds usb_autopm_set_interface() to the autosuspend API. It also provides convenient wrapper routines, usb_autopm_enable() and usb_autopm_disable(), for drivers that want to specify directly whether autosuspend should be allowed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/driver.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index ca0e40ed2b72..204495fa6b3d 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1322,6 +1322,28 @@ int usb_autopm_get_interface(struct usb_interface *intf)
}
EXPORT_SYMBOL_GPL(usb_autopm_get_interface);
+/**
+ * usb_autopm_set_interface - set a USB interface's autosuspend state
+ * @intf: the usb_interface whose state should be set
+ *
+ * This routine sets the autosuspend state of @intf's device according
+ * to @intf's usage counter, which the caller must have set previously.
+ * If the counter is <= 0, the device is autosuspended (if it isn't
+ * already suspended and if nothing else prevents the autosuspend). If
+ * the counter is > 0, the device is autoresumed (if it isn't already
+ * awake).
+ */
+int usb_autopm_set_interface(struct usb_interface *intf)
+{
+ int status;
+
+ status = usb_autopm_do_interface(intf, 0);
+ // dev_dbg(&intf->dev, "%s: status %d cnt %d\n",
+ // __FUNCTION__, status, intf->pm_usage_cnt);
+ return status;
+}
+EXPORT_SYMBOL_GPL(usb_autopm_set_interface);
+
#endif /* CONFIG_USB_SUSPEND */
static int usb_suspend(struct device *dev, pm_message_t message)