LXR linux/arch/arm/mach-ns9xxx/processor-ns9360.c

   1/*
   2 * arch/arm/mach-ns9xxx/processor-ns9360.c
   3 *
   4 * Copyright (C) 2007 by Digi International Inc.
   5 * All rights reserved.
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under the terms of the GNU General Public License version 2 as published by
   9 * the Free Software Foundation.
  10 */
  11#include <linux/io.h>
  12#include <linux/kernel.h>
  13#include <linux/slab.h>
  14
  15#include <asm/page.h>
  16#include <asm/mach/map.h>
  17#include <mach/processor-ns9360.h>
  18#include <mach/regs-sys-ns9360.h>
  19
  20void ns9360_reset(char mode)
  21{
  22        u32 reg;
  23
  24        reg = __raw_readl(SYS_PLL) >> 16;
  25        REGSET(reg, SYS_PLL, SWC, YES);
  26        __raw_writel(reg, SYS_PLL);
  27}
  28
  29#define CRYSTAL 29491200 /* Hz */
  30unsigned long ns9360_systemclock(void)
  31{
  32        u32 pll = __raw_readl(SYS_PLL);
  33        return CRYSTAL * (REGGETIM(pll, SYS_PLL, ND) + 1)
  34                >> REGGETIM(pll, SYS_PLL, FS);
  35}
  36
  37static struct map_desc ns9360_io_desc[] __initdata = {
  38        { /* BBus */
  39                .virtual = io_p2v(0x90000000),
  40                .pfn = __phys_to_pfn(0x90000000),
  41                .length = 0x00700000,
  42                .type = MT_DEVICE,
  43        }, { /* AHB */
  44                .virtual = io_p2v(0xa0100000),
  45                .pfn = __phys_to_pfn(0xa0100000),
  46                .length = 0x00900000,
  47                .type = MT_DEVICE,
  48        },
  49};
  50
  51void __init ns9360_map_io(void)
  52{
  53        iotable_init(ns9360_io_desc, ARRAY_SIZE(ns9360_io_desc));
  54}
  55