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authorMarc Zyngier <marc.zyngier@arm.com>2015-10-13 14:51:45 +0300
committerThomas Gleixner <tglx@linutronix.de>2015-10-13 20:01:25 +0300
commite7a46c818564329f977f8fa157b5e9e1d0d83012 (patch)
tree26f67d01cbe4b584166127b00e9f845a81ddf43f /Documentation/IRQ-domain.txt
parentbe5436c83ac8921f33fe07323fab03c6644ce52e (diff)
downloadlinux-e7a46c818564329f977f8fa157b5e9e1d0d83012.tar.xz
irqdomain: Documentation updates
Update the IRQ domain documentation to reflect the changes made while divorcing the domain infrastructure from Device Tree. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-18-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/IRQ-domain.txt')
-rw-r--r--Documentation/IRQ-domain.txt8
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/IRQ-domain.txt b/Documentation/IRQ-domain.txt
index 3a8e15cba816..8d990bde8693 100644
--- a/Documentation/IRQ-domain.txt
+++ b/Documentation/IRQ-domain.txt
@@ -32,9 +32,9 @@ top of the irq_alloc_desc*() API. An irq_domain to manage mapping is
preferred over interrupt controller drivers open coding their own
reverse mapping scheme.
-irq_domain also implements translation from Device Tree interrupt
-specifiers to hwirq numbers, and can be easily extended to support
-other IRQ topology data sources.
+irq_domain also implements translation from an abstract irq_fwspec
+structure to hwirq numbers (Device Tree and ACPI GSI so far), and can
+be easily extended to support other IRQ topology data sources.
=== irq_domain usage ===
An interrupt controller driver creates and registers an irq_domain by
@@ -184,7 +184,7 @@ There are four major interfaces to use hierarchy irq_domain:
related resources associated with these interrupts.
3) irq_domain_activate_irq(): activate interrupt controller hardware to
deliver the interrupt.
-3) irq_domain_deactivate_irq(): deactivate interrupt controller hardware
+4) irq_domain_deactivate_irq(): deactivate interrupt controller hardware
to stop delivering the interrupt.
Following changes are needed to support hierarchy irq_domain.