In general Renesas hardware is not documented to the extent where the
relationship between IP blocks on different SoCs can be assumed although
they may appear to operate the same way. Furthermore the documentation
typically does not specify a version for individual IP blocks. For these
reasons a convention of using the SoC name in place of a version and
providing SoC-specific compat strings has been adopted.
Although not universally liked this convention is used in the bindings for
most drivers for Renesas hardware. The purpose of this patch is to
update the Renesas USB DMA Controller driver to follow this convention.
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
---
* r8a7792 (R-Car V2H) is omitted as my reading of the documentation
is that Renesas USB-DMAC does not exist on that SoC
* r8a7795 (R-Car H2) is omitted as its unclear to me on the compatibility
of USB-DMAC that SoC
* Once this has been merged I intend to provide follow-up patches
to use these new compat strings in the relevant dtsi files.
---
Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt b/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt
index 040f365954cc..3bb624e10615 100644
--- a/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt
+++ b/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt
@@ -1,7 +1,12 @@
* Renesas USB DMA Controller Device Tree bindings
Required Properties:
-- compatible: must contain "renesas,usb-dmac"
+- compatible: "renesas,usb-dmac-<soctype>", "renesas,usb-dmac" as fallback.
+ Examples with soctypes are:
+ - "renesas,usb-dmac-r8a7790" (R-Car H2)
+ - "renesas,usb-dmac-r8a7791" (R-Car M2-W)
+ - "renesas,usb-dmac-r8a7793" (R-Car M2-N)
+ - "renesas,usb-dmac-r8a7794" (R-Car E2)
- reg: base address and length of the registers block for the DMAC
- interrupts: interrupt specifiers for the DMAC, one for each entry in
interrupt-names.
@@ -15,7 +20,7 @@ Required Properties:
Example: R8A7790 (R-Car H2) USB-DMACs
usb_dmac0: dma-controller@e65a0000 {
- compatible = "renesas,usb-dmac";
+ compatible = "renesas,usb-dmac-r8a7790", "renesas,usb-dmac";
reg = <0 0xe65a0000 0 0x100>;
interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH
0 109 IRQ_TYPE_LEVEL_HIGH>;
--
2.1.4
--
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