Commit 0e4a34bb authored by wanzongshun's avatar wanzongshun Committed by Russell King
Browse files

[ARM] 5549/1: Add clock api for w90p910 platform. 



Add clock api for w90p910 platform.

Signed-off-by: default avatarWan ZongShun <mcuos.com@gmail.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent c52d3d68

arch/arm/Kconfig

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@@ -490,6 +490,7 @@ config ARCH_W90X900 
	select CPU_ARM926T

	select CPU_ARM926T

	select ARCH_REQUIRE_GPIOLIB

	select ARCH_REQUIRE_GPIOLIB

	select GENERIC_GPIO

	select GENERIC_GPIO

	select COMMON_CLKDEV

	help

	help

		Support for Nuvoton (Winbond logic dept.) ARM9 processor,You

		Support for Nuvoton (Winbond logic dept.) ARM9 processor,You

		can login www.mcuos.com or www.nuvoton.com to know more.

		can login www.mcuos.com or www.nuvoton.com to know more.

arch/arm/mach-w90x900/Makefile

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Original line number Original line Diff line number Diff line
@@ -4,7 +4,7 @@ 




# Object file lists.

# Object file lists.





obj-y				:= irq.o time.o mfp-w90p910.o gpio.o

obj-y				:= irq.o time.o mfp-w90p910.o gpio.o clock.o





# W90X900 CPU support files

# W90X900 CPU support files

arch/arm/mach-w90x900/clock.c

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/*

 * linux/arch/arm/mach-w90x900/clock.c

 *

 * Copyright (c) 2008 Nuvoton technology corporation

 *

 * Wan ZongShun <mcuos.com@gmail.com>

 *

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

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License.

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/list.h>

#include <linux/errno.h>

#include <linux/err.h>

#include <linux/string.h>

#include <linux/clk.h>

#include <linux/spinlock.h>

#include <linux/platform_device.h>

#include <linux/io.h>



#include <mach/hardware.h>



#include "clock.h"



static DEFINE_SPINLOCK(clocks_lock);



int clk_enable(struct clk *clk)

{

	unsigned long flags;



	spin_lock_irqsave(&clocks_lock, flags);

	if (clk->enabled++ == 0)

		(clk->enable)(clk, 1);

	spin_unlock_irqrestore(&clocks_lock, flags);



	return 0;

}

EXPORT_SYMBOL(clk_enable);



void clk_disable(struct clk *clk)

{

	unsigned long flags;



	WARN_ON(clk->enabled == 0);



	spin_lock_irqsave(&clocks_lock, flags);

	if (--clk->enabled == 0)

		(clk->enable)(clk, 0);

	spin_unlock_irqrestore(&clocks_lock, flags);

}

EXPORT_SYMBOL(clk_disable);



void w90x900_clk_enable(struct clk *clk, int enable)

{

	unsigned int clocks = clk->cken;

	unsigned long clken;



	clken = __raw_readl(W90X900_VA_CLKPWR);



	if (enable)

		clken |= clocks;

	else

		clken &= ~clocks;



	__raw_writel(clken, W90X900_VA_CLKPWR);

}



void clks_register(struct clk_lookup *clks, size_t num)

{

	int i;



	for (i = 0; i < num; i++)

		clkdev_add(&clks[i]);

}

arch/arm/mach-w90x900/clock.h

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Original line number Original line Diff line number Diff line 
/*

 * linux/arch/arm/mach-w90x900/clock.h

 *

 * Copyright (c) 2008 Nuvoton technology corporation

 *

 * Wan ZongShun <mcuos.com@gmail.com>

 *

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

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License.

 */



#include <asm/clkdev.h>



void w90x900_clk_enable(struct clk *clk, int enable);

void clks_register(struct clk_lookup *clks, size_t num);



struct clk {

	unsigned long		cken;

	unsigned int		enabled;

	void			(*enable)(struct clk *, int enable);

};



#define DEFINE_CLK(_name, _ctrlbit)			\

struct clk clk_##_name = {				\

		.enable	= w90x900_clk_enable,		\

		.cken	= (1 << _ctrlbit),		\

	}



#define DEF_CLKLOOK(_clk, _devname, _conname)		\

	{						\

		.clk		= _clk,			\

		.dev_id		= _devname,		\

		.con_id		= _conname,		\

	}

arch/arm/mach-w90x900/cpu.h

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@@ -41,7 +41,7 @@ struct sys_timer; 
extern void w90x900_init_irq(void);

extern void w90x900_init_irq(void);

extern void w90p910_init_io(struct map_desc *mach_desc, int size);

extern void w90p910_init_io(struct map_desc *mach_desc, int size);

extern void w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no);

extern void w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no);

extern void w90p910_init_clocks(int xtal);

extern void w90p910_init_clocks(void);

extern void w90p910_map_io(struct map_desc *mach_desc, int size);

extern void w90p910_map_io(struct map_desc *mach_desc, int size);

extern struct platform_device w90p910_serial_device;

extern struct platform_device w90p910_serial_device;

extern struct sys_timer w90x900_timer;

extern struct sys_timer w90x900_timer;