Hi Magnus,
On Mon, Feb 29, 2016 at 3:33 PM, Magnus Damm <magnus.damm@xxxxxxxxx> wrote:
> From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
>
> Update the IPMMU DT binding documentation to include the r8a7795 compat
> string as well as the "renesas,ipmmu-main" property that on r8a7795 will
> be used to describe the topology and the relationship between the various
> cache IPMMU instances and the main IPMMU.
>
> Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
Thanks for your patch!
> ---
>
> Written against linux-next tag next-20160229
>
> Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt | 15 ++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)
>
> --- 0001/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt
> +++ work/Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt 2016-02-29 23:25:15.540513000 +0900
> @@ -7,23 +7,34 @@ connected to the IPMMU through a port ca
>
> Required Properties:
>
> - - compatible: Must contain SoC-specific and generic entries from below.
> + - compatible: Must contain SoC-specific and generic entry below in case
> + the device is compatible with the R-Car Gen2 VMSA-compatible IPMMU.
>
> - "renesas,ipmmu-r8a73a4" for the R8A73A4 (R-Mobile APE6) IPMMU.
> - "renesas,ipmmu-r8a7790" for the R8A7790 (R-Car H2) IPMMU.
> - "renesas,ipmmu-r8a7791" for the R8A7791 (R-Car M2-W) IPMMU.
> - "renesas,ipmmu-r8a7793" for the R8A7793 (R-Car M2-N) IPMMU.
> - "renesas,ipmmu-r8a7794" for the R8A7794 (R-Car E2) IPMMU.
> + - "renesas,ipmmu-r8a7795" for the R8A7795 (R-Car H3) IPMMU.
> - "renesas,ipmmu-vmsa" for generic R-Car Gen2 VMSA-compatible IPMMU.
>
> - 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.
> + single interrupt must be specified. Not required for cache IPMMUs.
>
> - #iommu-cells: Must be 1.
>
> +Optional properties:
> +
> + - renesas,ipmmu-main: reference to the main IPMMU instance in two cells.
> + The first cell is a phandle to the main IPMMU and the second cell is
> + the interrupt bit number associated with the particular cache IPMMU device.
> + The interrupt bit number needs to match the main IPMMU IMSSTR register.
> + Only used by cache IPMMU instances.
> +
> +
I think it would be good to include an example of how the optional properties
should be used.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
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