arch/arm/mach-s5p6440/cpu.c

   1 /* linux/arch/arm/mach-s5p6440/cpu.c
   2  *
   3  * Copyright (c) 2009 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9 */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/timer.h>
  16 #include <linux/init.h>
  17 #include <linux/clk.h>
  18 #include <linux/io.h>
  19 #include <linux/sysdev.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26
  27 #include <asm/proc-fns.h>
  28
  29 #include <mach/hardware.h>
  30 #include <mach/map.h>
  31 #include <asm/irq.h>
  32
  33 #include <plat/regs-serial.h>
  34 #include <mach/regs-clock.h>
  35
  36 #include <plat/cpu.h>
  37 #include <plat/devs.h>
  38 #include <plat/clock.h>
  39 #include <plat/s5p6440.h>
  40
  41 static void s5p6440_idle(void)
  42 {
  43         unsigned long val;
  44
  45         if (!need_resched()) {
  46                 val = __raw_readl(S5P_PWR_CFG);
  47                 val &= ~(0x3<<5);
  48                 val |= (0x1<<5);
  49                 __raw_writel(val, S5P_PWR_CFG);
  50
  51                 cpu_do_idle();
  52         }
  53         local_irq_enable();
  54 }
  55
  56 /* s5p6440_map_io
  57  *
  58  * register the standard cpu IO areas
  59 */
  60
  61 void __init s5p6440_map_io(void)
  62 {
  63         /* initialize any device information early */
  64         s3c_device_adc.name     = "s3c64xx-adc";
  65 }
  66
  67 void __init s5p6440_init_clocks(int xtal)
  68 {
  69         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
  70
  71         s3c24xx_register_baseclocks(xtal);
  72         s5p_register_clocks(xtal);
  73         s5p6440_register_clocks();
  74         s5p6440_setup_clocks();
  75 }
  76
  77 void __init s5p6440_init_irq(void)
  78 {
  79         /* S5P6440 supports only 2 VIC */
  80         u32 vic[2];
  81
  82         /*
  83          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
  84          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
  85          */
  86         vic[0] = 0xff800ae7;
  87         vic[1] = 0xffbf23e5;
  88
  89         s5p_init_irq(vic, ARRAY_SIZE(vic));
  90 }
  91
  92 struct sysdev_class s5p6440_sysclass = {
  93         .name   = "s5p6440-core",
  94 };
  95
  96 static struct sys_device s5p6440_sysdev = {
  97         .cls    = &s5p6440_sysclass,
  98 };
  99
 100 static int __init s5p6440_core_init(void)
 101 {
 102         return sysdev_class_register(&s5p6440_sysclass);
 103 }
 104
 105 core_initcall(s5p6440_core_init);
 106
 107 int __init s5p6440_init(void)
 108 {
 109         printk(KERN_INFO "S5P6440: Initializing architecture\n");
 110
 111         /* set idle function */
 112         pm_idle = s5p6440_idle;
 113
 114         return sysdev_register(&s5p6440_sysdev);
 115 }