projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a8d11e3d BD |
1 | /* linux/arch/arm/mach-s3c2410/s3c2440-clock.c |
| 2 | * | |
| 3 | * Copyright (c) 2004-2005 Simtec Electronics | |
| 4 | * http://armlinux.simtec.co.uk/ | |
| 5 | * Ben Dooks <ben@simtec.co.uk> | |
| 6 | * | |
| 7 | * S3C2440 Clock support | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License as published by | |
| 11 | * the Free Software Foundation; either version 2 of the License, or | |
| 12 | * (at your option) any later version. | |
| 13 | * | |
| 14 | * This program is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 | * GNU General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU General Public License | |
| 20 | * along with this program; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 22 | */ | |
| 23 | ||
| 24 | #include <linux/init.h> | |
| 25 | #include <linux/module.h> | |
| 26 | #include <linux/kernel.h> | |
| 27 | #include <linux/list.h> | |
| 28 | #include <linux/errno.h> | |
| 29 | #include <linux/err.h> | |
| 30 | #include <linux/device.h> | |
| 31 | #include <linux/sysdev.h> | |
| 32 | ||
| 33 | #include <linux/interrupt.h> | |
| 34 | #include <linux/ioport.h> | |
| 35 | ||
| 36 | #include <asm/hardware.h> | |
| 37 | #include <asm/atomic.h> | |
| 38 | #include <asm/irq.h> | |
| 39 | #include <asm/io.h> | |
| 40 | ||
| 41 | #include <asm/hardware/clock.h> | |
| 42 | #include <asm/arch/regs-clock.h> | |
| 43 | ||
| 44 | #include "clock.h" | |
| 45 | #include "cpu.h" | |
| 46 | ||
| 47 | /* S3C2440 extended clock support */ | |
| 48 | ||
| 49 | static struct clk s3c2440_clk_upll = { | |
| 50 | .name = "upll", | |
| 51 | .id = -1, | |
| 52 | }; | |
| 53 | ||
| 54 | static struct clk s3c2440_clk_cam = { | |
| 55 | .name = "camif", | |
| 56 | .id = -1, | |
| 57 | .enable = s3c24xx_clkcon_enable, | |
| 58 | .ctrlbit = S3C2440_CLKCON_CAMERA, | |
| 59 | }; | |
| 60 | ||
| 61 | static struct clk s3c2440_clk_ac97 = { | |
| 62 | .name = "ac97", | |
| 63 | .id = -1, | |
| 64 | .enable = s3c24xx_clkcon_enable, | |
| 65 | .ctrlbit = S3C2440_CLKCON_CAMERA, | |
| 66 | }; | |
| 67 | ||
| 68 | static int s3c2440_clk_add(struct sys_device *sysdev) | |
| 69 | { | |
| 70 | unsigned long upllcon = __raw_readl(S3C2410_UPLLCON); | |
| 71 | struct clk *clk_h; | |
| 72 | struct clk *clk_p; | |
| 73 | struct clk *clk_xtal; | |
| 74 | ||
| 75 | clk_xtal = clk_get(NULL, "xtal"); | |
| 76 | if (IS_ERR(clk_xtal)) { | |
| 77 | printk(KERN_ERR "S3C2440: Failed to get clk_xtal\n"); | |
| 78 | return -EINVAL; | |
| 79 | } | |
| 80 | ||
| 81 | s3c2440_clk_upll.rate = s3c2410_get_pll(upllcon, clk_xtal->rate); | |
| 82 | ||
| 83 | printk("S3C2440: Clock Support, UPLL %ld.%03ld MHz\n", | |
| 84 | print_mhz(s3c2440_clk_upll.rate)); | |
| 85 | ||
| 86 | clk_p = clk_get(NULL, "pclk"); | |
| 87 | clk_h = clk_get(NULL, "hclk"); | |
| 88 | ||
| 89 | if (IS_ERR(clk_p) || IS_ERR(clk_h)) { | |
| 90 | printk(KERN_ERR "S3C2440: Failed to get parent clocks\n"); | |
| 91 | return -EINVAL; | |
| 92 | } | |
| 93 | ||
| 94 | s3c2440_clk_cam.parent = clk_h; | |
| 95 | s3c2440_clk_ac97.parent = clk_p; | |
| 96 | ||
| 97 | s3c24xx_register_clock(&s3c2440_clk_ac97); | |
| 98 | s3c24xx_register_clock(&s3c2440_clk_cam); | |
| 99 | s3c24xx_register_clock(&s3c2440_clk_upll); | |
| 100 | ||
| 101 | clk_disable(&s3c2440_clk_ac97); | |
| 102 | clk_disable(&s3c2440_clk_cam); | |
| 103 | ||
| 104 | return 0; | |
| 105 | } | |
| 106 | ||
| 107 | static struct sysdev_driver s3c2440_clk_driver = { | |
| 108 | .add = s3c2440_clk_add, | |
| 109 | }; | |
| 110 | ||
| 111 | static __init int s3c24xx_clk_driver(void) | |
| 112 | { | |
| 113 | return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_clk_driver); | |
| 114 | } | |
| 115 | ||
| 116 | arch_initcall(s3c24xx_clk_driver); |