ARM/clk: move the ICST library to drivers/clk

This moves the ICST clock divider helper library from
arch/arm/common to drivers/clk/versatile so it is maintained
with the other clock drivers.

We keep the structure as a helper library intact and do not
fuse it with the clk-icst.c Versatile ICST clock driver: there
may be other users out there that need to use this library for
their clocking, and then it will be helpful to keep the
library contained. (The icst.[c|h] files could just be moved
to drivers/clk/lib or a similar location to share the library.)

Acked-by: Stephen Boyd <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

arch/arm/common/Kconfig

···
-config ICST
-	bool
-
 config SA1111
 	bool
 	select DMABOUNCE if !ARCH_PXA

arch/arm/common/Makefile

···
 
 obj-y				+= firmware.o
 
-obj-$(CONFIG_ICST)		+= icst.o
 obj-$(CONFIG_SA1111)		+= sa1111.o
 obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
 obj-$(CONFIG_SHARP_LOCOMO)	+= locomo.o

arch/arm/common/icst.c drivers/clk/versatile/icst.c

···
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <asm/div64.h>
-#include <asm/hardware/icst.h>
+#include "icst.h"
 
 /*
  * Divisors for each OD setting.

arch/arm/include/asm/hardware/icst.h drivers/clk/versatile/icst.h

···
 /*
- *  arch/arm/include/asm/hardware/icst.h
- *
  *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify
···
  *  clock generators.  See http://www.idt.com/ for more information
  *  on these devices.
  */
-#ifndef ASMARM_HARDWARE_ICST_H
-#define ASMARM_HARDWARE_ICST_H
+#ifndef ICST_H
+#define ICST_H
 
 struct icst_params {
 	unsigned long	ref;

drivers/clk/versatile/Kconfig

···
+config ICST
+	bool
+
 config COMMON_CLK_VERSATILE
 	bool "Clock driver for ARM Reference designs"
 	depends on ARCH_INTEGRATOR || ARCH_REALVIEW || \

drivers/clk/versatile/Makefile

···
 # Makefile for Versatile-specific clocks
-obj-$(CONFIG_ICST)		+= clk-icst.o clk-versatile.o
+obj-$(CONFIG_ICST)		+= icst.o clk-icst.o clk-versatile.o
 obj-$(CONFIG_INTEGRATOR_IMPD1)	+= clk-impd1.o
 obj-$(CONFIG_ARCH_REALVIEW)	+= clk-realview.o
 obj-$(CONFIG_CLK_SP810)		+= clk-sp810.o

drivers/clk/versatile/clk-icst.c

···
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
 
+#include "icst.h"
 #include "clk-icst.h"
 
 /* Magic unlocking token used on all Versatile boards */

drivers/clk/versatile/clk-icst.h

···
-#include <asm/hardware/icst.h>
-
 /**
  * struct clk_icst_desc - descriptor for the ICST VCO
  * @params: ICST parameters

drivers/clk/versatile/clk-impd1.c

···
 #include <linux/io.h>
 #include <linux/platform_data/clk-integrator.h>
 
+#include "icst.h"
 #include "clk-icst.h"
 
 #define IMPD1_OSC1	0x00

drivers/clk/versatile/clk-realview.c

···
 #include <linux/io.h>
 #include <linux/clk-provider.h>
 
+#include "icst.h"
 #include "clk-icst.h"
 
 #define REALVIEW_SYS_OSC0_OFFSET             0x0C

drivers/clk/versatile/clk-versatile.c

···
 #include <linux/of.h>
 #include <linux/of_address.h>
 
+#include "icst.h"
 #include "clk-icst.h"
 
 #define INTEGRATOR_HDR_LOCK_OFFSET	0x14