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dt-bindings: clock: add description of LPC32xx USB clock controller

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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@mleia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
This commit is contained in:
Vladimir Zapolskiy 2015-12-06 12:45:54 +02:00 committed by Michael Turquette
parent 92e16f0fb2
commit d3efc5ac59
1 changed files with 22 additions and 0 deletions
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22
Documentation/devicetree/bindings/clock/nxp,lpc3220-usb-clk.txt Normal file
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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 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
ranges = <0x0 0x31020000 0x00001000>;
usbclk: clock-controller@f00 {
compatible = "nxp,lpc3220-usb-clk";
reg = <0xf00 0x100>;
#clock-cells = <1>;
};
};