| Message ID | 1418737457-22042-6-git-send-email-laurent.pinchart+renesas@ideasonboard.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
Hi Laurent, On Tue, Dec 16, 2014 at 2:44 PM, Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> wrote: > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Thanks! Apart from the minor nit below: Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> > + ipmmu_mx: mmu@fe951800 { fe951000 (yes, having to put the same information in two places will cause discrepancies) > + compatible = "renasas,ipmmu-vmsa"; > + reg = <0 0xfe951000 0 0x1000>; > + interrupts = <0 222 IRQ_TYPE_LEVEL_HIGH>, > + <0 221 IRQ_TYPE_LEVEL_HIGH>; > + #iommu-cells = <1>; > + }; Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Geert, On Tuesday 16 December 2014 14:52:39 Geert Uytterhoeven wrote: > On Tue, Dec 16, 2014 at 2:44 PM, Laurent Pinchart wrote: > > Signed-off-by: Laurent Pinchart > > <laurent.pinchart+renesas@ideasonboard.com> > > Thanks! > > Apart from the minor nit below: > Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> > > > + ipmmu_mx: mmu@fe951800 { > > fe951000 Oops :-) Fixed, and applied your ack. Thank you. > (yes, having to put the same information in two places will cause > discrepancies) > > > + compatible = "renasas,ipmmu-vmsa"; > > + reg = <0 0xfe951000 0 0x1000>; > > + interrupts = <0 222 IRQ_TYPE_LEVEL_HIGH>, > > + <0 221 IRQ_TYPE_LEVEL_HIGH>; > > + #iommu-cells = <1>; > > + };
diff --git a/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt b/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt new file mode 100644 index 000000000000..ba225a091dcf --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt @@ -0,0 +1,41 @@ +* Renesas VMSA-Compatible IOMMU + +The IPMMU is an IOMMU implementation compatible with the ARM VMSA page tables. +It provides address translation for bus masters outside of the CPU, each +connected to the IPMMU through a port called micro-TLB. + + +Required Properties: + + - compatible: Must contain "renesas,ipmmu-vmsa". + - reg: Base address and size of the IPMMU registers. + - interrupts: Specifiers for the MMU fault interrupts. For instances that + support secure mode two interrupts must be specified, for non-secure and + secure mode, in that order. For instances that don't support secure mode a + single interrupt must be specified. + + - #iommu-cells: Must be 1. + +Each bus master connected to an IPMMU must reference the IPMMU in its device +node with the following property: + + - iommus: A reference to the IPMMU in two cells. The first cell is a phandle + to the IPMMU and the second cell the number of the micro-TLB that the + device is connected to. + + +Example: R8A7791 IPMMU-MX and VSP1-D0 bus master + + ipmmu_mx: mmu@fe951800 { + compatible = "renasas,ipmmu-vmsa"; + reg = <0 0xfe951000 0 0x1000>; + interrupts = <0 222 IRQ_TYPE_LEVEL_HIGH>, + <0 221 IRQ_TYPE_LEVEL_HIGH>; + #iommu-cells = <1>; + }; + + vsp1@fe928000 { + ... + iommus = <&ipmmu_mx 13>; + ... + };
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> --- .../bindings/iommu/renesas,ipmmu-vmsa.txt | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt Cc: devicetree@vger.kernel.org Changes compared to v1: - Extend the register range over both the base registers bank and the non-secure aliases - Specify both the secure and non-secure interrupt, when applicable