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: Andrew 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: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Andrew Bresticker 2015-04-07 15:04:16 -07:00 committed by Ralf Baechle
parent 018f62ee20
commit 90bc35c5da
2 changed files with 45 additions and 0 deletions

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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>;
};

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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 */