[PATCH v3 08/12] Documentation: bindings: add doc for the USB2 ChipIdea USB driver
From: arnd@arndb.de (Arnd Bergmann)
Date: 2014-07-16 08:40:29
Also in:
linux-devicetree, lkml
On Wednesday 16 July 2014 10:26:02 Antoine T?nart wrote:
quoted hunk ↗ jump to hunk
+ +Required properties: +- compatible: should be "chipidea,usb2" +- reg: base address and length of the registers +- interrupts: interrupt for the USB controller + +Optional properties: +- clocks: reference to the USB clock +- usb-phy: reference to the USB PHY
I think the phy reference should use the standard phy binding, using "phys" property to refer to a node that has a "#phy-cells" property. It seems the code gets this right, but just the documentation is wrong.
+- vbus-supply: reference to the VBUS regulator +- dma-mask: DMA bit mask
No. Do not use "dma-mask" as a property, that is a pure Linux specific concept. The DT way to express this is to use the 'dma-ranges' property in the device's parent to describe any bus-related restrictions, and for the driver to ask for a mask that matches what the hardware is capable of (which may be smaller or larger than what the bus supports). Arnd