forked from Minki/linux
db58e90fdb
Add sub clock api for w90p910 platform. Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
96 lines
1.8 KiB
C
96 lines
1.8 KiB
C
/*
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* linux/arch/arm/mach-w90x900/clock.c
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*
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* Copyright (c) 2008 Nuvoton technology corporation
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/clk.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include "clock.h"
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#define SUBCLK 0x24
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static DEFINE_SPINLOCK(clocks_lock);
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int clk_enable(struct clk *clk)
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{
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unsigned long flags;
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spin_lock_irqsave(&clocks_lock, flags);
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if (clk->enabled++ == 0)
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(clk->enable)(clk, 1);
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spin_unlock_irqrestore(&clocks_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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unsigned long flags;
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WARN_ON(clk->enabled == 0);
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spin_lock_irqsave(&clocks_lock, flags);
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if (--clk->enabled == 0)
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(clk->enable)(clk, 0);
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spin_unlock_irqrestore(&clocks_lock, flags);
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}
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EXPORT_SYMBOL(clk_disable);
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void w90x900_clk_enable(struct clk *clk, int enable)
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{
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unsigned int clocks = clk->cken;
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unsigned long clken;
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clken = __raw_readl(W90X900_VA_CLKPWR);
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if (enable)
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clken |= clocks;
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else
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clken &= ~clocks;
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__raw_writel(clken, W90X900_VA_CLKPWR);
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}
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void w90x900_subclk_enable(struct clk *clk, int enable)
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{
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unsigned int clocks = clk->cken;
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unsigned long clken;
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clken = __raw_readl(W90X900_VA_CLKPWR + SUBCLK);
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if (enable)
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clken |= clocks;
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else
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clken &= ~clocks;
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__raw_writel(clken, W90X900_VA_CLKPWR + SUBCLK);
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}
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void clks_register(struct clk_lookup *clks, size_t num)
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{
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int i;
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for (i = 0; i < num; i++)
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clkdev_add(&clks[i]);
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}
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