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Release 4.11 arch/arm/mach-w90x900/clock.c

/*
 * 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"


#define SUBCLK 0x24

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; }

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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); }

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EXPORT_SYMBOL(clk_disable);
unsigned long clk_get_rate(struct clk *clk) { return 15000000; }

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EXPORT_SYMBOL(clk_get_rate);
void nuc900_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); }

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void nuc900_subclk_enable(struct clk *clk, int enable) { unsigned int clocks = clk->cken; unsigned long clken; clken = __raw_readl(W90X900_VA_CLKPWR + SUBCLK); if (enable) clken |= clocks; else clken &= ~clocks; __raw_writel(clken, W90X900_VA_CLKPWR + SUBCLK); }

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