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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 ARCH_REQUIRE_GPIOLIB

	select GENERIC_GPIO

	select COMMON_CLKDEV

	help

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

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

arch/arm/mach-w90x900/Makefile

+1 −1
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@@ -4,7 +4,7 @@ 


# 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

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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+36 −0
Original line number 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

+1 −1
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@@ -41,7 +41,7 @@ struct sys_timer; 
extern void w90x900_init_irq(void);

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_clocks(int xtal);

extern void w90p910_init_clocks(void);

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

extern struct platform_device w90p910_serial_device;

extern struct sys_timer w90x900_timer;