linux-imx

/*

 *  Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org>

 *  Copyright (C) 2004        John Steele Scott <toojays@toojays.net>

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * TODO: Need a big cleanup here. Basically, we need to have different

 * cpufreq_driver structures for the different type of HW instead of the

 * current mess. We also need to better deal with the detection of the

 * type of machine.

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/sched.h>

#include <linux/adb.h>

#include <linux/pmu.h>

#include <linux/cpufreq.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/hardirq.h>

#include <linux/of_device.h>

#include <asm/prom.h>

#include <asm/machdep.h>

#include <asm/irq.h>

#include <asm/pmac_feature.h>

#include <asm/mmu_context.h>

#include <asm/sections.h>

#include <asm/cputable.h>

#include <asm/time.h>

#include <asm/mpic.h>

#include <asm/keylargo.h>

#include <asm/switch_to.h>

​

/* WARNING !!! This will cause calibrate_delay() to be called,

 * but this is an __init function ! So you MUST go edit

 * init/main.c to make it non-init before enabling DEBUG_FREQ

 */

#undef DEBUG_FREQ

​

extern void low_choose_7447a_dfs(int dfs);

extern void low_choose_750fx_pll(int pll);

extern void low_sleep_handler(void);

​

/*

 * Currently, PowerMac cpufreq supports only high & low frequencies

 * that are set by the firmware

 */

static unsigned int low_freq;

static unsigned int hi_freq;

static unsigned int cur_freq;

static unsigned int sleep_freq;

static unsigned long transition_latency;

​

/*