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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
61 lines
2.1 KiB
Plaintext
61 lines
2.1 KiB
Plaintext
What: /sys/kernel/irq
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: Directory containing information about the system's IRQs.
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Specifically, data from the associated struct irq_desc.
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The information here is similar to that in /proc/interrupts
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but in a more machine-friendly format. This directory contains
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one subdirectory for each Linux IRQ number.
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What: /sys/kernel/irq/<irq>/actions
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: The IRQ action chain. A comma-separated list of zero or more
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device names associated with this interrupt.
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What: /sys/kernel/irq/<irq>/chip_name
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: Human-readable chip name supplied by the associated device
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driver.
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What: /sys/kernel/irq/<irq>/hwirq
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: When interrupt translation domains are used, this file contains
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the underlying hardware IRQ number used for this Linux IRQ.
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What: /sys/kernel/irq/<irq>/name
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: Human-readable flow handler name as defined by the irq chip
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driver.
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What: /sys/kernel/irq/<irq>/per_cpu_count
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: The number of times the interrupt has fired since boot. This
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is a comma-separated list of counters; one per CPU in CPU id
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order. NOTE: This file consistently shows counters for all
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CPU ids. This differs from the behavior of /proc/interrupts
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which only shows counters for online CPUs.
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What: /sys/kernel/irq/<irq>/type
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Date: September 2016
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KernelVersion: 4.9
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Contact: Craig Gallek <kraig@google.com>
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Description: The type of the interrupt. Either the string 'level' or 'edge'.
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What: /sys/kernel/irq/<irq>/wakeup
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Date: March 2018
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KernelVersion: 4.17
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Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Description: The wakeup state of the interrupt. Either the string
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'enabled' or 'disabled'.
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