dt-bindings: Document img,boston-clock binding

Binding for Imagination Technologies MIPS Boston clock sources.

This binding uses the common clock binding[1].

[1] Documentation/devicetree/bindings/clock/clock-bindings.txt

The device node must be a child node of the syscon node corresponding to the

Boston system's platform registers.

Required properties:

- compatible : Should be "img,boston-clock".

- #clock-cells : Should be set to 1.

  Values available for clock consumers can be found in the header file:

    <dt-bindings/clock/boston-clock.h>

Example:

	system-controller@17ffd000 {

		compatible = "img,boston-platform-regs", "syscon";

		reg = <0x17ffd000 0x1000>;

		clk_boston: clock {

			compatible = "img,boston-clock";

			#clock-cells = <1>;

		};

	};

	uart0: uart@17ffe000 {

		/* ... */

		clocks = <&clk_boston BOSTON_CLK_SYS>;

	};

F:	drivers/*/*loongson1*

F:	drivers/*/*/*loongson1*

MIPS BOSTON DEVELOPMENT BOARD

M:	Paul Burton <paul.burton@imgtec.com>

L:	linux-mips@linux-mips.org

S:	Maintained

F:	Documentation/devicetree/bindings/clock/img,boston-clock.txt

F:	include/dt-bindings/clock/boston-clock.h

MIROSOUND PCM20 FM RADIO RECEIVER DRIVER

M:	Hans Verkuil <hverkuil@xs4all.nl>

L:	linux-media@vger.kernel.org

/*

 * Copyright (C) 2016 Imagination Technologies

 *

 * SPDX-License-Identifier:	GPL-2.0

 */

#ifndef __DT_BINDINGS_CLOCK_BOSTON_CLOCK_H__

#define __DT_BINDINGS_CLOCK_BOSTON_CLOCK_H__

#define BOSTON_CLK_INPUT 0

#define BOSTON_CLK_SYS 1

#define BOSTON_CLK_CPU 2

#endif /* __DT_BINDINGS_CLOCK_BOSTON_CLOCK_H__ */