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linux-next/Documentation/devicetree/bindings/iommu/ti,omap-iommu.txt
Florian Vaussard a8689f65de Documentation: dt: add OMAP iommu bindings
This patch adds the iommu bindings for all OMAP2+ SoCs. Apart from
the standard bindings used by OMAP peripherals, this patch uses a
'dma-window' (already used by Tegra SMMU) and adds two OMAP custom
bindings - 'ti,#tlb-entries' and 'ti,iommu-bus-err-back'.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
[s-anna@ti.com: split bindings document, add dra7 and bus error back]
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2014-03-04 17:01:55 +01:00

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OMAP2+ IOMMU
Required properties:
- compatible : Should be one of,
"ti,omap2-iommu" for OMAP2/OMAP3 IOMMU instances
"ti,omap4-iommu" for OMAP4/OMAP5 IOMMU instances
"ti,dra7-iommu" for DRA7xx IOMMU instances
- ti,hwmods : Name of the hwmod associated with the IOMMU instance
- reg : Address space for the configuration registers
- interrupts : Interrupt specifier for the IOMMU instance
Optional properties:
- ti,#tlb-entries : Number of entries in the translation look-aside buffer.
Should be either 8 or 32 (default: 32)
- ti,iommu-bus-err-back : Indicates the IOMMU instance supports throwing
back a bus error response on MMU faults.
Example:
/* OMAP3 ISP MMU */
mmu_isp: mmu@480bd400 {
compatible = "ti,omap2-iommu";
reg = <0x480bd400 0x80>;
interrupts = <24>;
ti,hwmods = "mmu_isp";
ti,#tlb-entries = <8>;
};