diff options
Diffstat (limited to 'arch/arm/mach-s3c2410/s3c2442-clock.c')
| -rw-r--r-- | arch/arm/mach-s3c2410/s3c2442-clock.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/arch/arm/mach-s3c2410/s3c2442-clock.c b/arch/arm/mach-s3c2410/s3c2442-clock.c deleted file mode 100644 index 4e292ca..0000000 --- a/arch/arm/mach-s3c2410/s3c2442-clock.c +++ /dev/null @@ -1,171 +0,0 @@ -/* linux/arch/arm/mach-s3c2410/s3c2442-clock.c - * - * Copyright (c) 2004-2005 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * Ben Dooks <ben@simtec.co.uk> - * - * S3C2442 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 <linux/mutex.h> -#include <linux/clk.h> - -#include <asm/hardware.h> -#include <asm/atomic.h> -#include <asm/irq.h> -#include <asm/io.h> - -#include <asm/arch/regs-clock.h> - -#include "clock.h" -#include "cpu.h" - -/* S3C2442 extended clock support */ - -static unsigned long s3c2442_camif_upll_round(struct clk *clk, - unsigned long rate) -{ - unsigned long parent_rate = clk_get_rate(clk->parent); - int div; - - if (rate > parent_rate) - return parent_rate; - - div = parent_rate / rate; - - if (div == 3) - return parent_rate / 3; - - /* note, we remove the +/- 1 calculations for the divisor */ - - div /= 2; - - if (div < 1) - div = 1; - else if (div > 16) - div = 16; - - return parent_rate / (div * 2); -} - -static int s3c2442_camif_upll_setrate(struct clk *clk, unsigned long rate) -{ - unsigned long parent_rate = clk_get_rate(clk->parent); - unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); - - rate = s3c2442_camif_upll_round(clk, rate); - - camdivn &= ~S3C2442_CAMDIVN_CAMCLK_DIV3; - - if (rate == parent_rate) { - camdivn &= ~S3C2440_CAMDIVN_CAMCLK_SEL; - } else if ((parent_rate / rate) == 3) { - camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; - camdivn |= S3C2442_CAMDIVN_CAMCLK_DIV3; - } else { - camdivn &= ~S3C2440_CAMDIVN_CAMCLK_MASK; - camdivn |= S3C2440_CAMDIVN_CAMCLK_SEL; - camdivn |= (((parent_rate / rate) / 2) - 1); - } - - __raw_writel(camdivn, S3C2440_CAMDIVN); - - return 0; -} - -/* Extra S3C2442 clocks */ - -static struct clk s3c2442_clk_cam = { - .name = "camif", - .id = -1, - .enable = s3c2410_clkcon_enable, - .ctrlbit = S3C2440_CLKCON_CAMERA, -}; - -static struct clk s3c2442_clk_cam_upll = { - .name = "camif-upll", - .id = -1, - .set_rate = s3c2442_camif_upll_setrate, - .round_rate = s3c2442_camif_upll_round, -}; - -static int s3c2442_clk_add(struct sys_device *sysdev) -{ - unsigned long camdivn = __raw_readl(S3C2440_CAMDIVN); - unsigned long clkdivn; - struct clk *clock_h; - struct clk *clock_p; - struct clk *clock_upll; - - printk("S3C2442: Clock Support, DVS %s\n", - (camdivn & S3C2440_CAMDIVN_DVSEN) ? "on" : "off"); - - clock_p = clk_get(NULL, "pclk"); - clock_h = clk_get(NULL, "hclk"); - clock_upll = clk_get(NULL, "upll"); - - if (IS_ERR(clock_p) || IS_ERR(clock_h) || IS_ERR(clock_upll)) { - printk(KERN_ERR "S3C2442: Failed to get parent clocks\n"); - return -EINVAL; - } - - /* check rate of UPLL, and if it is near 96MHz, then change - * to using half the UPLL rate for the system */ - - if (clk_get_rate(clock_upll) > (94 * MHZ)) { - clk_usb_bus.rate = clk_get_rate(clock_upll) / 2; - - mutex_lock(&clocks_mutex); - - clkdivn = __raw_readl(S3C2410_CLKDIVN); - clkdivn |= S3C2440_CLKDIVN_UCLK; - __raw_writel(clkdivn, S3C2410_CLKDIVN); - - mutex_unlock(&clocks_mutex); - } - - s3c2442_clk_cam.parent = clock_h; - s3c2442_clk_cam_upll.parent = clock_upll; - - s3c24xx_register_clock(&s3c2442_clk_cam); - s3c24xx_register_clock(&s3c2442_clk_cam_upll); - - clk_disable(&s3c2442_clk_cam); - - return 0; -} - -static struct sysdev_driver s3c2442_clk_driver = { - .add = s3c2442_clk_add, -}; - -static __init int s3c2442_clk_init(void) -{ - return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_clk_driver); -} - -arch_initcall(s3c2442_clk_init); |
