On 20.11.2015 18:41, Rob Herring wrote:
> On Fri, Nov 20, 2015 at 03:05:02AM +0200, Vladimir Zapolskiy wrote:
>> NXP LPC32xx USB controller has a subdevice, which controls USB AHB
>> slave, USB OTG, USB OHCI, USB device and I2C controller to USB phy
>> clocks, this change adds description of the clock controller, for more
>> details reference LPC32xx User's Manual, namely USB control, OTG clock
>> control and OTG clock status registers.
>>
>> Signed-off-by: Vladimir Zapolskiy <vz@xxxxxxxxx>
>> ---
>> .../bindings/clock/nxp,lpc3220-usb-clk.txt | 22 ++++++++++++++++++++++
>> 1 file changed, 22 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/clock/nxp,lpc3220-usb-clk.txt
>>
>> diff --git a/Documentation/devicetree/bindings/clock/nxp,lpc3220-usb-clk.txt b/Documentation/devicetree/bindings/clock/nxp,lpc3220-usb-clk.txt
>> new file mode 100644
>> index 0000000..67fba7f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/clock/nxp,lpc3220-usb-clk.txt
>> @@ -0,0 +1,22 @@
>> +NXP LPC32xx USB Clock Controller
>> +
>> +Required properties:
>> +- compatible: should be "nxp,lpc3220-usb-clk"
>> +- reg: should contain clock controller registers location and length
>> +- #clock-cells: must be 1, the cell holds id of a clock provided by the
>> + USB clock controller
>> +
>> +Examples:
>> +
>> + usb {
>
> I don't understand the full structure of USB blocks. Can you make the
> example complete. All the blocks are a child of this node?
Yes, all the blocks are children of this node.
USB controller contains 5 subdevices, interestingly one of these
subdevices, I2C controller, is the same as a general purpose I2C
controller device.
Please find some description here:
http://www.spinics.net/lists/devicetree/msg98538.html
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> + compatible = "simple-bus";
>> + ranges = <0x0 0x31020000 0x00001000>;
>> +
>> + usbclk: clock-controller@F00 {
> lower case ^
>
>> + compatible = "nxp,lpc3220-usb-clk";
>> + reg = <0xF00 0x100>;
>
> lower case
Ok, thanks for pointing it out.
>> + #clock-cells = <1>;
>> + };
>> + };
>> --
>> 2.1.4
>>
--
Vladimir
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