PM: Convert wakeup flag accessors to inline functions

This patch (as1058) improves the wakeup macros in include/linux/pm.h.
All but the trivial ones are converted to inline routines, which
requires moving them to a separate header file since they depend on
the definition of struct device.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 90 insertions, 0 deletions

diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h
new file mode 100644
index 0000000..f0d0b2c
--- /dev/null
+++ b/include/linux/pm_wakeup.h
@@ -0,0 +1,90 @@
+/*
+ *  pm_wakeup.h - Power management wakeup interface
+ *
+ *  Copyright (C) 2008 Alan Stern
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _LINUX_PM_WAKEUP_H
+#define _LINUX_PM_WAKEUP_H
+
+#ifndef _DEVICE_H_
+# error "please don't include this file directly"
+#endif
+
+#ifdef CONFIG_PM
+
+/* changes to device_may_wakeup take effect on the next pm state change.
+ * by default, devices should wakeup if they can.
+ */
+static inline void device_init_wakeup(struct device *dev, int val)
+{
+	dev->power.can_wakeup = dev->power.should_wakeup = !!val;
+}
+
+static inline int device_can_wakeup(struct device *dev)
+{
+	return dev->power.can_wakeup;
+}
+
+static inline void device_set_wakeup_enable(struct device *dev, int val)
+{
+	dev->power.should_wakeup = !!val;
+}
+
+static inline int device_may_wakeup(struct device *dev)
+{
+	return dev->power.can_wakeup & dev->power.should_wakeup;
+}
+
+/*
+ * Platform hook to activate device wakeup capability, if that's not already
+ * handled by enable_irq_wake() etc.
+ * Returns zero on success, else negative errno
+ */
+extern int (*platform_enable_wakeup)(struct device *dev, int is_on);
+
+static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
+{
+	if (platform_enable_wakeup)
+		return (*platform_enable_wakeup)(dev, is_on);
+	return 0;
+}
+
+#else /* !CONFIG_PM */
+
+/* For some reason the next two routines work even without CONFIG_PM */
+static inline void device_init_wakeup(struct device *dev, int val)
+{
+	dev->power.can_wakeup = !!val;
+}
+
+static inline int device_can_wakeup(struct device *dev)
+{
+	return dev->power.can_wakeup;
+}
+
+#define device_set_wakeup_enable(dev, val)	do {} while (0)
+#define device_may_wakeup(dev)			0
+
+static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
+{
+	return 0;
+}
+
+#endif /* !CONFIG_PM */
+
+#endif /* _LINUX_PM_WAKEUP_H */