[ARM] 5549/1: Add clock api for w90p910 platform. (0e4a34bb) · Commits · 戴 / test

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

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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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		/*
		* 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 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;

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