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| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-04-04 16:11:49 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-04-04 16:11:49 -0700 |
| commit | 664b0bae0b87f69bc9deb098f5e0158b9cf18e04 (patch) | |
| tree | d5841492b396ff483723b9339c7c11dc33b67688 /Documentation/IRQ-domain.txt | |
| parent | Input: ALPS - fix TrackStick detection on Thinkpad L570 and Latitude 7370 (diff) | |
| parent | Input: i8042 - enable MUX on Sony VAIO VGN-CS series to fix touchpad (diff) | |
| download | linux-dev-664b0bae0b87f69bc9deb098f5e0158b9cf18e04.tar.xz linux-dev-664b0bae0b87f69bc9deb098f5e0158b9cf18e04.zip | |
Merge branch 'next' into for-linus
Prepare input updates for 4.17 merge window.
Diffstat (limited to 'Documentation/IRQ-domain.txt')
| -rw-r--r-- | Documentation/IRQ-domain.txt | 36 |
1 files changed, 2 insertions, 34 deletions
diff --git a/Documentation/IRQ-domain.txt b/Documentation/IRQ-domain.txt index 4a1cd7645d85..507775cce753 100644 --- a/Documentation/IRQ-domain.txt +++ b/Documentation/IRQ-domain.txt @@ -265,37 +265,5 @@ support other architectures, such as ARM, ARM64 etc. === Debugging === -If you switch on CONFIG_IRQ_DOMAIN_DEBUG (which depends on -CONFIG_IRQ_DOMAIN and CONFIG_DEBUG_FS), you will find a new file in -your debugfs mount point, called irq_domain_mapping. This file -contains a live snapshot of all the IRQ domains in the system: - - name mapped linear-max direct-max devtree-node - pl061 8 8 0 /smb/gpio@e0080000 - pl061 8 8 0 /smb/gpio@e1050000 - pMSI 0 0 0 /interrupt-controller@e1101000/v2m@e0080000 - MSI 37 0 0 /interrupt-controller@e1101000/v2m@e0080000 - GICv2m 37 0 0 /interrupt-controller@e1101000/v2m@e0080000 - GICv2 448 448 0 /interrupt-controller@e1101000 - -it also iterates over the interrupts to display their mapping in the -domains, and makes the domain stacking visible: - - -irq hwirq chip name chip data active type domain - 1 0x00019 GICv2 0xffff00000916bfd8 * LINEAR GICv2 - 2 0x0001d GICv2 0xffff00000916bfd8 LINEAR GICv2 - 3 0x0001e GICv2 0xffff00000916bfd8 * LINEAR GICv2 - 4 0x0001b GICv2 0xffff00000916bfd8 * LINEAR GICv2 - 5 0x0001a GICv2 0xffff00000916bfd8 LINEAR GICv2 -[...] - 96 0x81808 MSI 0x (null) RADIX MSI - 96+ 0x00063 GICv2m 0xffff8003ee116980 RADIX GICv2m - 96+ 0x00063 GICv2 0xffff00000916bfd8 LINEAR GICv2 - 97 0x08800 MSI 0x (null) * RADIX MSI - 97+ 0x00064 GICv2m 0xffff8003ee116980 * RADIX GICv2m - 97+ 0x00064 GICv2 0xffff00000916bfd8 * LINEAR GICv2 - -Here, interrupts 1-5 are only using a single domain, while 96 and 97 -are build out of a stack of three domain, each level performing a -particular function. +Most of the internals of the IRQ subsystem are exposed in debugfs by +turning CONFIG_GENERIC_IRQ_DEBUGFS on. |