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/*
* arch/arm/mach-tegra/common.c
*
* Copyright (C) 2010 Google, Inc.
*
* Author:
* Colin Cross <ccross@android.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/of_irq.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <mach/iomap.h>
#include <mach/system.h>
#include "board.h"
#include "clock.h"
#include "fuse.h"
void (*arch_reset)(char mode, const char *cmd) = tegra_assert_system_reset;
static const struct of_device_id tegra_dt_irq_match[] __initconst = {
{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init },
{ }
};
void __init tegra_dt_init_irq(void)
{
tegra_init_irq();
of_irq_init(tegra_dt_irq_match);
}
void tegra_assert_system_reset(char mode, const char *cmd)
{
void __iomem *reset = IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x04);
u32 reg;
/* use *_related to avoid spinlock since caches are off */
reg = readl_relaxed(reset);
reg |= 0x04;
writel_relaxed(reg, reset);
}
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
static __initdata struct tegra_clk_init_table tegra20_clk_init_table[] = {
/* name parent rate enabled */
{ "clk_m", NULL, 0, true },
{ "pll_p", "clk_m", 216000000, true },
{ "pll_p_out1", "pll_p", 28800000, true },
{ "pll_p_out2", "pll_p", 48000000, true },
{ "pll_p_out3", "pll_p", 72000000, true },
{ "pll_p_out4", "pll_p", 108000000, true },
{ "sclk", "pll_p_out4", 108000000, true },
{ "hclk", "sclk", 108000000, true },
{ "pclk", "hclk", 54000000, true },
{ "csite", NULL, 0, true },
{ "emc", NULL, 0, true },
{ "cpu", NULL, 0, true },
{ NULL, NULL, 0, 0},
};
#endif
static void __init tegra_init_cache(void)
{
#ifdef CONFIG_CACHE_L2X0
void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
writel_relaxed(0x331, p + L2X0_TAG_LATENCY_CTRL);
writel_relaxed(0x441, p + L2X0_DATA_LATENCY_CTRL);
l2x0_init(p, 0x6C080001, 0x8200c3fe);
#endif
}
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
void __init tegra20_init_early(void)
{
tegra_init_fuse();
tegra2_init_clocks();
tegra_clk_init_from_table(tegra20_clk_init_table);
tegra_init_cache();
}
#endif
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