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genirq: Add wakeup sysfs node to show IRQ wakeup state

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Surprisingly there is no simple way to see if the IRQ line in question
is wakeup source or not.

Note that wakeup might be an OOB (out-of-band) source like GPIO line
which makes things slightly more complicated.

Add a sysfs node to cover this case.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Tony Lindgren <tony@atomide.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Link: https://lkml.kernel.org/r/20180226155043.67937-1-andriy.shevchenko@linux.intel.com
This commit is contained in:
Andy Shevchenko
2018-02-26 17:50:43 +02:00
committed by Thomas Gleixner
parent e69c61dd05
commit d61e2944b6
2 changed files with 24 additions and 0 deletions
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7
Documentation/ABI/testing/sysfs-kernel-irq
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@@ -51,3 +51,10 @@ Date: September 2016
KernelVersion: 4.9
Contact: Craig Gallek <kraig@google.com>
Description: The type of the interrupt. Either the string 'level' or 'edge'.
What: /sys/kernel/irq/<irq>/wakeup
Date: March 2018
KernelVersion: 4.17
Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Description: The wakeup state of the interrupt. Either the string
'enabled' or 'disabled'.