diff options
author | Tony Lindgren <tony@atomide.com> | 2014-07-09 04:02:09 -0700 |
---|---|---|
committer | Tony Lindgren <tony@atomide.com> | 2014-07-09 04:02:09 -0700 |
commit | 5a0b1b4dac29896fb6c34148894a09b919363f51 (patch) | |
tree | 1e8aa7d3af5fc5592a1a1ef9022aeec9d5c9a8d9 /Documentation/devicetree/bindings/arm | |
parent | b675d1ecced015f180d5d43056bed94cda87d80f (diff) | |
parent | a46631c4cda1488a69600efb93f38d84b7a57541 (diff) | |
download | op-kernel-dev-5a0b1b4dac29896fb6c34148894a09b919363f51.zip op-kernel-dev-5a0b1b4dac29896fb6c34148894a09b919363f51.tar.gz |
Merge branch 'dts-crossbar' into omap-for-v3.17/dt
Diffstat (limited to 'Documentation/devicetree/bindings/arm')
-rw-r--r-- | Documentation/devicetree/bindings/arm/omap/crossbar.txt | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/omap/crossbar.txt b/Documentation/devicetree/bindings/arm/omap/crossbar.txt index fb88585..4139db3 100644 --- a/Documentation/devicetree/bindings/arm/omap/crossbar.txt +++ b/Documentation/devicetree/bindings/arm/omap/crossbar.txt @@ -10,6 +10,7 @@ Required properties: - compatible : Should be "ti,irq-crossbar" - reg: Base address and the size of the crossbar registers. - ti,max-irqs: Total number of irqs available at the interrupt controller. +- ti,max-crossbar-sources: Maximum number of crossbar sources that can be routed. - ti,reg-size: Size of a individual register in bytes. Every individual register is assumed to be of same size. Valid sizes are 1, 2, 4. - ti,irqs-reserved: List of the reserved irq lines that are not muxed using @@ -17,11 +18,46 @@ Required properties: so crossbar bar driver should not consider them as free lines. +Optional properties: +- ti,irqs-skip: This is similar to "ti,irqs-reserved", but these are for + SOC-specific hard-wiring of those irqs which unexpectedly bypasses the + crossbar. These irqs have a crossbar register, but still cannot be used. + +- ti,irqs-safe-map: integer which maps to a safe configuration to use + when the interrupt controller irq is unused (when not provided, default is 0) + Examples: crossbar_mpu: @4a020000 { compatible = "ti,irq-crossbar"; reg = <0x4a002a48 0x130>; ti,max-irqs = <160>; + ti,max-crossbar-sources = <400>; ti,reg-size = <2>; ti,irqs-reserved = <0 1 2 3 5 6 131 132 139 140>; + ti,irqs-skip = <10 133 139 140>; }; + +Consumer: +======== +See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt and +Documentation/devicetree/bindings/arm/gic.txt for further details. + +An interrupt consumer on an SoC using crossbar will use: + interrupts = <GIC_SPI request_number interrupt_level> +When the request number is between 0 to that described by +"ti,max-crossbar-sources", it is assumed to be a crossbar mapping. If the +request_number is greater than "ti,max-crossbar-sources", then it is mapped as a +quirky hardware mapping direct to GIC. + +Example: + device_x@0x4a023000 { + /* Crossbar 8 used */ + interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>; + ... + }; + + device_y@0x4a033000 { + /* Direct mapped GIC SPI 1 used */ + interrupts = <GIC_SPI DIRECT_IRQ(1) IRQ_TYPE_LEVEL_HIGH>; + ... + }; |