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/*
* Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file bus_freq.c
*
* @brief A common API for the Freescale Semiconductor i.MXC CPUfreq module
* and DVFS CORE module.
*
* The APIs are for setting bus frequency to low or high.
*
* @ingroup PM
*/
#include <linux/proc_fs.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <mach/clock.h>
#include <mach/hardware.h>
int low_bus_freq_mode;
int high_bus_freq_mode;
char *gp_reg_id = "REG3_CORE";
int set_low_bus_freq(void)
{
return 0;
}
int set_high_bus_freq(int high_bus_freq)
{
return 0;
}
int low_freq_bus_used(void)
{
return 0;
}
/*!
* This is the probe routine for the bus frequency driver.
*
* @param pdev The platform device structure
*
* @return The function returns 0 on success
*
*/
static int __devinit busfreq_probe(struct platform_device *pdev)
{
low_bus_freq_mode = 0;
high_bus_freq_mode = 0;
return 0;
}
static struct platform_driver busfreq_driver = {
.driver = {
.name = "busfreq",
},
.probe = busfreq_probe,
};
/*!
* Initialise the busfreq_driver.
*
* @return The function always returns 0.
*/
static int __init busfreq_init(void)
{
if (platform_driver_register(&busfreq_driver) != 0) {
printk(KERN_ERR "busfreq_driver register failed\n");
return -ENODEV;
}
printk(KERN_INFO "Bus freq driver module loaded\n");
return 0;
}
static void __exit busfreq_cleanup(void)
{
/* Unregister the device structure */
platform_driver_unregister(&busfreq_driver);
}
module_init(busfreq_init);
module_exit(busfreq_cleanup);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("BusFreq driver");
MODULE_LICENSE("GPL");
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