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Commit 90bc35c5 authored by Andrew Bresticker's avatar Andrew Bresticker Committed by Ralf Baechle
Browse files

phy: Add binding document for Pistachio USB2.0 PHY 



Add a binding document for the USB2.0 PHY found on the IMG Pistachio SoC.

Signed-off-by: default avatarAndrew Bresticker <abrestic@chromium.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: devicetree@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: James Hartley <james.hartley@imgtec.com>
Cc: Damien Horsley <Damien.Horsley@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/9727/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 018f62ee

Documentation/devicetree/bindings/phy/pistachio-usb-phy.txt

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IMG Pistachio USB PHY

=====================



Required properties:

--------------------

 - compatible: Must be "img,pistachio-usb-phy".

 - #phy-cells: Must be 0.  See ./phy-bindings.txt for details.

 - clocks: Must contain an entry for each entry in clock-names.

   See ../clock/clock-bindings.txt for details.

 - clock-names: Must include "usb_phy".

 - img,cr-top: Must constain a phandle to the CR_TOP syscon node.

 - img,refclk: Indicates the reference clock source for the USB PHY.

   See <dt-bindings/phy/phy-pistachio-usb.h> for a list of valid values.



Optional properties:

--------------------

 - phy-supply: USB VBUS supply.  Must supply 5.0V.



Example:

--------

usb_phy: usb-phy {

	compatible = "img,pistachio-usb-phy";

	clocks = <&clk_core CLK_USB_PHY>;

	clock-names = "usb_phy";

	phy-supply = <&usb_vbus>;

	img,refclk = <REFCLK_CLK_CORE>;

	img,cr-top = <&cr_top>;

	#phy-cells = <0>;

};

include/dt-bindings/phy/phy-pistachio-usb.h

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/*

 * Copyright (C) 2015 Google, Inc.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 */



#ifndef _DT_BINDINGS_PHY_PISTACHIO

#define _DT_BINDINGS_PHY_PISTACHIO



#define REFCLK_XO_CRYSTAL	0x0

#define REFCLK_X0_EXT_CLK	0x1

#define REFCLK_CLK_CORE		0x2



#endif /* _DT_BINDINGS_PHY_PISTACHIO */