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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-10 08:38:57 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-10 08:38:57 -0800
commitecb50f0afd35a51ef487e8a54b976052eb03d729 (patch)
tree27457f87d3dc2ce6c81e16d795f953e66c2fff45 /Documentation
parentMerge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff)
parentirqchip: dw-apb-ictl: Add PM support (diff)
downloadlinux-dev-ecb50f0afd35a51ef487e8a54b976052eb03d729.tar.xz
linux-dev-ecb50f0afd35a51ef487e8a54b976052eb03d729.zip
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq core updates from Thomas Gleixner: "This is the first (boring) part of irq updates: - support for big endian I/O accessors in the generic irq chip - cleanup of brcmstb/bcm7120 drivers so they can be reused for non ARM SoCs - the usual pile of fixes and updates for the various ARM irq chips" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits) irqchip: dw-apb-ictl: Add PM support irqchip: dw-apb-ictl: Enable IRQ_GC_MASK_CACHE_PER_TYPE irqchip: dw-apb-ictl: Always use use {readl|writel}_relaxed ARM: orion: convert the irq_reg_{readl,writel} calls to the new API irqchip: atmel-aic: Add missing entry for rm9200 irq fixups irqchip: atmel-aic: Rename at91sam9_aic_irq_fixup for naming consistency irqchip: atmel-aic: Add specific irq fixup function for sam9g45 and sam9rl irqchip: atmel-aic: Add irq fixups for at91sam926x SoCs irqchip: atmel-aic: Add irq fixup for RTT block irqchip: brcmstb-l2: Convert driver to use irq_reg_{readl,writel} irqchip: bcm7120-l2: Convert driver to use irq_reg_{readl,writel} irqchip: bcm7120-l2: Decouple driver from brcmstb-l2 irqchip: bcm7120-l2: Extend driver to support 64+ bit controllers irqchip: bcm7120-l2: Use gc->mask_cache to simplify suspend/resume functions irqchip: bcm7120-l2: Fix missing nibble in gc->unused mask irqchip: bcm7120-l2: Make sure all register accesses use base+offset irqchip: bcm7120-l2, brcmstb-l2: Remove ARM Kconfig dependency irqchip: bcm7120-l2: Eliminate bad IRQ check irqchip: brcmstb-l2: Eliminate dependency on ARM code genirq: Generic chip: Add big endian I/O accessors ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt26
1 files changed, 18 insertions, 8 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt
index ff812a8a82bc..bae1f2187226 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt
@@ -13,7 +13,12 @@ Such an interrupt controller has the following hardware design:
or if they will output an interrupt signal at this 2nd level interrupt
controller, in particular for UARTs
-- not all 32-bits within the interrupt controller actually map to an interrupt
+- typically has one 32-bit enable word and one 32-bit status word, but on
+ some hardware may have more than one enable/status pair
+
+- no atomic set/clear operations
+
+- not all bits within the interrupt controller actually map to an interrupt
The typical hardware layout for this controller is represented below:
@@ -48,7 +53,9 @@ The typical hardware layout for this controller is represented below:
Required properties:
- compatible: should be "brcm,bcm7120-l2-intc"
-- reg: specifies the base physical address and size of the registers
+- reg: specifies the base physical address and size of the registers;
+ multiple pairs may be specified, with the first pair handling IRQ offsets
+ 0..31 and the second pair handling 32..63
- interrupt-controller: identifies the node as an interrupt controller
- #interrupt-cells: specifies the number of cells needed to encode an interrupt
source, should be 1.
@@ -59,18 +66,21 @@ Required properties:
- brcm,int-map-mask: 32-bits bit mask describing how many and which interrupts
are wired to this 2nd level interrupt controller, and how they match their
respective interrupt parents. Should match exactly the number of interrupts
- specified in the 'interrupts' property.
+ specified in the 'interrupts' property, multiplied by the number of
+ enable/status register pairs implemented by this controller. For
+ multiple parent IRQs with multiple enable/status words, this looks like:
+ <irq0_w0 irq0_w1 irq1_w0 irq1_w1 ...>
Optional properties:
- brcm,irq-can-wake: if present, this means the L2 controller can be used as a
wakeup source for system suspend/resume.
-- brcm,int-fwd-mask: if present, a 32-bits bit mask to configure for the
- interrupts which have a mux gate, typically UARTs. Setting these bits will
- make their respective interrupts outputs bypass this 2nd level interrupt
- controller completely, it completely transparent for the interrupt controller
- parent
+- brcm,int-fwd-mask: if present, a bit mask to configure the interrupts which
+ have a mux gate, typically UARTs. Setting these bits will make their
+ respective interrupt outputs bypass this 2nd level interrupt controller
+ completely; it is completely transparent for the interrupt controller
+ parent. This should have one 32-bit word per enable/status pair.
Example: