u-boot/arch/arm/mach-tegra/tegra20/cpu.c
Masahiro Yamada 09f455dca7 ARM: tegra: collect SoC sources into mach-tegra
This commit moves files as follows:

 arch/arm/cpu/arm720t/tegra20/*      -> arch/arm/mach-tegra/tegra20/*
 arch/arm/cpu/arm720t/tegra30/*      -> arch/arm/mach-tegra/tegra30/*
 arch/arm/cpu/arm720t/tegra114/*     -> arch/arm/mach-tegra/tegra114/*
 arch/arm/cpu/arm720t/tegra124*      -> arch/arm/mach-tegra/tegra124/*
 arch/arm/cpu/arm720t/tegra-common/* -> arch/arm/mach-tegra/*
 arch/arm/cpu/armv7/tegra20/*        -> arch/arm/mach-tegra/tegra20/*
 arch/arm/cpu/armv7/tegra30/*        -> arch/arm/mach-tegra/tegra30/*
 arch/arm/cpu/armv7/tegra114/*       -> arch/arm/mach-tegra/tegra114/*
 arch/arm/cpu/armv7/tegra124/*       -> arch/arm/mach-tegra/tegra124/*
 arch/arm/cpu/armv7/tegra-common/*   -> arch/arm/mach-tegra/*
 arch/arm/cpu/tegra20-common/*       -> arch/arm/mach-tegra/tegra20/*
 arch/arm/cpu/tegra30-common/*       -> arch/arm/mach-tegra/tegra30/*
 arch/arm/cpu/tegra114-common/*      -> arch/arm/mach-tegra/tegra114/*
 arch/arm/cpu/tegra124-common/*      -> arch/arm/mach-tegra/tegra124/*
 arch/arm/cpu/tegra-common/*         -> arch/arm/mach-tegra/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Simon Glass <sjg@chromium.org> [ on nyan-big ]
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Tom Warren <twarren@nvidia.com>
2015-02-21 08:23:51 -05:00

70 lines
1.8 KiB
C

/*
* Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/pmc.h>
#include "../cpu.h"
static void enable_cpu_power_rail(void)
{
struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
u32 reg;
reg = readl(&pmc->pmc_cntrl);
reg |= CPUPWRREQ_OE;
writel(reg, &pmc->pmc_cntrl);
/*
* The TI PMU65861C needs a 3.75ms delay between enabling
* the power rail and enabling the CPU clock. This delay
* between SM1EN and SM1 is for switching time + the ramp
* up of the voltage to the CPU (VDD_CPU from PMU).
*/
udelay(3750);
}
void start_cpu(u32 reset_vector)
{
/* Enable VDD_CPU */
enable_cpu_power_rail();
/* Hold the CPUs in reset */
reset_A9_cpu(1);
/* Disable the CPU clock */
enable_cpu_clock(0);
/* Enable CoreSight */
clock_enable_coresight(1);
/*
* Set the entry point for CPU execution from reset,
* if it's a non-zero value.
*/
if (reset_vector)
writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR);
/* Enable the CPU clock */
enable_cpu_clock(1);
/* If the CPU doesn't already have power, power it up */
powerup_cpu();
/* Take the CPU out of reset */
reset_A9_cpu(0);
}