release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-tegra/common.c

   1 /*
   2  * arch/arm/mach-tegra/board-harmony.c
   3  *
   4  * Copyright (C) 2010 Google, Inc.
   5  *
   6  * Author:
   7  *      Colin Cross <ccross@android.com>
   8  *
   9  * This software is licensed under the terms of the GNU General Public
  10  * License version 2, as published by the Free Software Foundation, and
  11  * may be copied, distributed, and modified under those terms.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/io.h>
  22
  23 #include <asm/hardware/cache-l2x0.h>
  24
  25 #include <mach/iomap.h>
  26
  27 #include "board.h"
  28 #include "clock.h"
  29
  30 static __initdata struct tegra_clk_init_table common_clk_init_table[] = {
  31         /* name         parent          rate            enabled */
  32         { "clk_m",      NULL,           0,              true },
  33         { "pll_p",      "clk_m",        216000000,      true },
  34         { "pll_p_out1", "pll_p",        28800000,       true },
  35         { "pll_p_out2", "pll_p",        48000000,       true },
  36         { "pll_p_out3", "pll_p",        72000000,       true },
  37         { "pll_p_out4", "pll_p",        108000000,      true },
  38         { "sys",        "pll_p_out4",   108000000,      true },
  39         { "hclk",       "sys",          108000000,      true },
  40         { "pclk",       "hclk",         54000000,       true },
  41         { NULL,         NULL,           0,              0},
  42 };
  43
  44 void __init tegra_init_cache(void)
  45 {
  46 #ifdef CONFIG_CACHE_L2X0
  47         void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
  48
  49         writel(0x331, p + L2X0_TAG_LATENCY_CTRL);
  50         writel(0x441, p + L2X0_DATA_LATENCY_CTRL);
  51
  52         l2x0_init(p, 0x6C080001, 0x8200c3fe);
  53 #endif
  54 }
  55
  56 void __init tegra_common_init(void)
  57 {
  58         tegra_init_clock();
  59         tegra_clk_init_from_table(common_clk_init_table);
  60         tegra_init_cache();
  61 }