From 075c1771526c85849ed22298d048bc07e400aee5 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Thu, 26 Apr 2007 00:12:06 -0700 Subject: define platform wakeup hook, use in pci_enable_wake() This defines a platform hook to enable/disable a device as a wakeup event source. It's initially for use with ACPI, but more generally it could be used whenever enable_irq_wake()/disable_irq_wake() don't suffice. The hook is called -- if available -- inside pci_enable_wake(); and the semantics of that call are enhanced so that support for PCI PME# is no longer needed. It can now work for devices with "legacy PCI PM", when platform support allows it. (That support would use some board-specific signal for for the same purpose as PME#.) [akpm@linux-foundation.org: Make it compile with CONFIG_PM=n] Signed-off-by: David Brownell Signed-off-by: Zhang Rui Cc: Len Brown Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- include/linux/pm.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include/linux/pm.h') diff --git a/include/linux/pm.h b/include/linux/pm.h index 21db05ac7c0b..b0ab623adbf5 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -273,6 +273,20 @@ extern void __suspend_report_result(const char *function, void *fn, int ret); __suspend_report_result(__FUNCTION__, fn, ret); \ } while (0) +/* + * 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 */ static inline int device_suspend(pm_message_t state) @@ -294,6 +308,11 @@ static inline void dpm_runtime_resume(struct device * dev) #define suspend_report_result(fn, ret) do { } while (0) +static inline int call_platform_enable_wakeup(struct device *dev, int is_on) +{ + return -EIO; +} + #endif /* changes to device_may_wakeup take effect on the next pm state change. -- cgit v1.2.3