Re: [PATCH 07/11] dt/bindings: da8xx-usb: Add binding for the cppi41 dma controller

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Hello!

On 01/09/2017 07:06 PM, Alexandre Bailon wrote:

DT binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx cppi41 dma controller.

   It's called CPPI 4.1, not cppi41.
Let me introduce myself: I was the author of the 1st CPPI 4.1 drivers (never merged).

Signed-off-by: Alexandre Bailon <abailon@xxxxxxxxxxxx>
---
 .../devicetree/bindings/usb/da8xx-usb.txt          | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/da8xx-usb.txt b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
index ccb844a..2a4d737 100644
--- a/Documentation/devicetree/bindings/usb/da8xx-usb.txt
+++ b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
@@ -18,10 +18,26 @@ Required properties:
[...]
 Optional properties:
 ~~~~~~~~~~~~~~~~~~~~
  - vbus-supply: Phandle to a regulator providing the USB bus power.

+DMA
+~~~
+- compatible: ti,da8xx-cppi41
+- reg: offset and length of the following register spaces: USBSS, USB

   I don't understand what you mean by USBSS and how it's related to CPPI 4.1.

+  CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager

I'd drop "USB" everywhere, the DMAC scheduler and queue manager are not a part of any USB logic.

+- reg-names: glue, controller, scheduler, queuemgr

   Quoted, maybe?

+- #dma-cells: should be set to 2. The first number represents the
+  endpoint number (0 … 3 for endpoints 1 … 4).

   Not sure why you need EPs here. Is that required by the DMA driver?
The DMA controller operates with channels...

[...]

MBR, Sergei

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