/* linux/arch/arm/mach-s3c2410/s3c2440-clock.c
*
* Copyright (c) 2004-2005 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* S3C2440 Clock support
*
* 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, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/device.h>
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <asm/hardware.h>
#include <asm/atomic.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/hardware/clock.h>
#include <asm/arch/regs-clock.h>
#include "clock.h"
#include "cpu.h"
/* S3C2440 extended clock support */
static struct clk s3c2440_clk_upll = {
.name = "upll",
.id = -1,
};
static struct clk s3c2440_clk_cam = {
.name = "camif",
.id = -1,
.enable = s3c24xx_clkcon_enable,
.ctrlbit = S3C2440_CLKCON_CAMERA,
};
static struct clk s3c2440_clk_ac97 = {
.name = "ac97",
.id = -1,
.enable = s3c24xx_clkcon_enable,
.ctrlbit = S3C2440_CLKCON_CAMERA,
};
static int s3c2440_clk_add(struct sys_device *sysdev)
{
unsigned long upllcon = __raw_readl(S3C2410_UPLLCON);
unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN);
struct clk *clk_h;
struct clk *clk_p;
struct clk *clk_xtal;
clk_xtal = clk_get(NULL, "xtal");
if (IS_ERR(clk_xtal)) {
printk(KERN_ERR "S3C2440: Failed to get clk_xtal\n");
return -EINVAL;
}
s3c2440_clk_upll.rate = s3c2410_get_pll(upllcon, clk_xtal->rate);
printk("S3C2440: Clock Support, UPLL %ld.%03ld MHz, DVS %s\n",
print_mhz(s3c2440_clk_upll.rate),
(camdivn & S3C2440_CAMDIVN_DVSEN) ? "on" : "off");
clk_p = clk_get(NULL, "pclk");
clk_h = clk_get(NULL, "hclk");
if (IS_ERR(clk_p) || IS_ERR(clk_h)) {
printk(KERN_ERR "S3C2440: Failed to get parent clocks\n");
return -EINVAL;
}
s3c2440_clk_cam.parent = clk_h;
s3c2440_clk_ac97.parent = clk_p;
s3c24xx_register_clock(&s3c2440_clk_ac97);
s3c24xx_register_clock(&s3c2440_clk_cam);
s3c24xx_register_clock(&s3c2440_clk_upll);
clk_disable(&s3c2440_clk_ac97);
clk_disable(&s3c2440_clk_cam);
return 0;
}
static struct sysdev_driver s3c2440_clk_driver = {
.add = s3c2440_clk_add,
};
static __init int s3c24xx_clk_driver(void)
{
return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_clk_driver);
}
arch_initcall(s3c24xx_clk_driver);
