On Thu, Feb 20, 2014 at 06:23:13PM +0000, Felipe Balbi wrote:
> Hi,
>
> On Wed, Feb 19, 2014 at 03:10:45PM +0530, Subbaraya Sundeep Bhatta wrote:
> > This patch adds xilinx axi usb2 device driver support
> >
> > Signed-off-by: Subbaraya Sundeep Bhatta <sbha...@xilinx.com>
> > ---
> > .../devicetree/bindings/usb/xilinx_usb.txt | 21 +
> > drivers/usb/gadget/Kconfig | 14 +
> > drivers/usb/gadget/Makefile | 1 +
> > drivers/usb/gadget/xilinx_udc.c | 2045
> > ++++++++++++++++++++
> > 4 files changed, 2081 insertions(+), 0 deletions(-)
> > create mode 100644 Documentation/devicetree/bindings/usb/xilinx_usb.txt
> > create mode 100644 drivers/usb/gadget/xilinx_udc.c
> >
> > diff --git a/Documentation/devicetree/bindings/usb/xilinx_usb.txt
> > b/Documentation/devicetree/bindings/usb/xilinx_usb.txt
> > new file mode 100644
> > index 0000000..acf03ab
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/xilinx_usb.txt
> > @@ -0,0 +1,21 @@
> > +Xilinx AXI USB2 device controller
> > +
> > +Required properties:
> > +- compatible : Should be "xlnx,axi-usb2-device-4.00.a"
Is "axi-usb2-device" the official device name?
> > +- reg : Physical base address and size of the Axi USB2
> > + device registers map.
> > +- interrupts : Property with a value describing the interrupt
> > + number.
Does the device only have a single interrupt?
> > +- interrupt-parent : Must be core interrupt controller
Is this strictly necessary?
> > +- xlnx,include-dma : Must be 1 or 0 based on whether DMA is included
> > + in IP or not.
Perhaps xlnx,has-builtin-dma would better describe this?
> > +
> > +Example:
> > + axi-usb2-device@42e00000 {
> > + compatible = "xlnx,axi-usb2-device-4.00.a";
> > + interrupt-parent = <0x1>;
> > + interrupts = <0x0 0x39 0x1>;
> > + reg = <0x42e00000 0x10000>;
> > + xlnx,include-dma = <0x1>;
> > + };
> > +
>
> you need to Cc devicet...@vger.kernel.org for this.
Cheers Filipe; thanks for adding us to Cc :)
[...]
> > + /* Map the registers */
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + udc->base_address = devm_ioremap_nocache(&pdev->dev, res->start,
> > + resource_size(res));
>
> use devm_ioremap_resource() instead.
Also, res might be NULL. You should check that before dereferencing it.
Cheers,
Mark.
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