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https://github.com/torvalds/linux
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cd51d0edec
Enable the cpu, emc (memory controller) and csite (debug and trace controller) clocks during init to prevent them from being disabled by the bootloader clock disabling code. Signed-off-by: Colin Cross <ccross@android.com> Acked-by: Olof Johansson <olof@lixom.net>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* arch/arm/mach-tegra/board-harmony.c
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*
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* Copyright (C) 2010 Google, Inc.
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*
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* Author:
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* Colin Cross <ccross@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <mach/iomap.h>
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#include <mach/dma.h>
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#include <mach/system.h>
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#include "board.h"
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#include "clock.h"
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#include "fuse.h"
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void (*arch_reset)(char mode, const char *cmd) = tegra_assert_system_reset;
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void tegra_assert_system_reset(char mode, const char *cmd)
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{
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void __iomem *reset = IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x04);
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u32 reg;
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/* use *_related to avoid spinlock since caches are off */
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reg = readl_relaxed(reset);
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reg |= 0x04;
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writel_relaxed(reg, reset);
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}
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static __initdata struct tegra_clk_init_table common_clk_init_table[] = {
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/* name parent rate enabled */
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{ "clk_m", NULL, 0, true },
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{ "pll_p", "clk_m", 216000000, true },
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{ "pll_p_out1", "pll_p", 28800000, true },
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{ "pll_p_out2", "pll_p", 48000000, true },
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{ "pll_p_out3", "pll_p", 72000000, true },
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{ "pll_p_out4", "pll_p", 108000000, true },
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{ "sclk", "pll_p_out4", 108000000, true },
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{ "hclk", "sclk", 108000000, true },
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{ "pclk", "hclk", 54000000, true },
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{ "csite", NULL, 0, true },
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{ "emc", NULL, 0, true },
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{ "cpu", NULL, 0, true },
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{ NULL, NULL, 0, 0},
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};
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void __init tegra_init_cache(void)
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{
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#ifdef CONFIG_CACHE_L2X0
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void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
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writel_relaxed(0x331, p + L2X0_TAG_LATENCY_CTRL);
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writel_relaxed(0x441, p + L2X0_DATA_LATENCY_CTRL);
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l2x0_init(p, 0x6C080001, 0x8200c3fe);
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#endif
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}
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void __init tegra_init_early(void)
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{
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tegra_init_fuse();
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tegra_init_clock();
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tegra_clk_init_from_table(common_clk_init_table);
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tegra_init_cache();
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#ifdef CONFIG_TEGRA_SYSTEM_DMA
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tegra_dma_init();
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#endif
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}
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