Merge commit 'f8b50363' into stm32-dt-for-v4.11

  property, containing a phandle to the clock device node, an index selecting

  between gated clocks and other clocks and an index specifying the clock to

  use.

- clocks: External oscillator clock phandle

  - high speed external clock signal (HSE)

  - external I2S clock (I2S_CKIN)

Example:

		#clock-cells = <2>

		compatible = "st,stm32f42xx-rcc", "st,stm32-rcc";

		reg = <0x40023800 0x400>;

		clocks = <&clk_hse>, <&clk_i2s_ckin>;

	};

Specifying gated clocks

	0	SYSTICK

	1	FCLK

	2	CLK_LSI		(low-power clock source)

	3	CLK_LSE		(generated from a 32.768 kHz low-speed external

				 crystal or ceramic resonator)

	4	CLK_HSE_RTC	(HSE division factor for RTC clock)

	5	CLK_RTC		(real-time clock)

	6	PLL_VCO_I2S	(vco frequency of I2S pll)

	7	PLL_VCO_SAI	(vco frequency of SAI pll)

	8	CLK_LCD		(LCD-TFT)

	9	CLK_I2S		(I2S clocks)

	10	CLK_SAI1	(audio clocks)

	11	CLK_SAI2

	12	CLK_I2SQ_PDIV	(post divisor of pll i2s q divisor)

	13	CLK_SAIQ_PDIV	(post divisor of pll sai q divisor)

Example:

/*

 * stm32fx-clock.h

 *

 * Copyright (C) 2016 STMicroelectronics

 * Author: Gabriel Fernandez for STMicroelectronics.

 * License terms:  GNU General Public License (GPL), version 2

 */

/*

 * List of clocks wich are not derived from system clock (SYSCLOCK)

 *

 * The index of these clocks is the secondary index of DT bindings

 * (see Documentatoin/devicetree/bindings/clock/st,stm32-rcc.txt)

 *

 * e.g:

	<assigned-clocks = <&rcc 1 CLK_LSE>;

*/

#ifndef _DT_BINDINGS_CLK_STMFX_H

#define _DT_BINDINGS_CLK_STMFX_H

#define SYSTICK			0

#define FCLK			1

#define CLK_LSI			2

#define CLK_LSE			3

#define CLK_HSE_RTC		4

#define CLK_RTC			5

#define PLL_VCO_I2S		6

#define PLL_VCO_SAI		7

#define CLK_LCD			8

#define CLK_I2S			9

#define CLK_SAI1		10

#define CLK_SAI2		11

#define CLK_I2SQ_PDIV		12

#define CLK_SAIQ_PDIV		13

#define END_PRIMARY_CLK		14

#endif