forked from Minki/linux
a99d34b506
This reverts commit 510bb59 "ARM: tegra: add cpu_disable for hotplug".
The Tegra114 support CPU0 hotplug function in HW physically, but it needs
other software to make it work normally after we add CPU idle power down
mode support. So remove them for now.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* Copyright (C) 2002 ARM Ltd.
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* All Rights Reserved
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* Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <linux/clk/tegra.h>
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#include <asm/smp_plat.h>
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#include "fuse.h"
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#include "sleep.h"
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static void (*tegra_hotplug_shutdown)(void);
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int tegra_cpu_kill(unsigned cpu)
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{
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cpu = cpu_logical_map(cpu);
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/* Clock gate the CPU */
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tegra_wait_cpu_in_reset(cpu);
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tegra_disable_cpu_clock(cpu);
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return 1;
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}
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/*
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* platform-specific code to shutdown a CPU
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*
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* Called with IRQs disabled
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*/
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void __ref tegra_cpu_die(unsigned int cpu)
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{
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/* Clean L1 data cache */
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tegra_disable_clean_inv_dcache();
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/* Shut down the current CPU. */
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tegra_hotplug_shutdown();
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/* Should never return here. */
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BUG();
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}
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void __init tegra_hotplug_init(void)
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{
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if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
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return;
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if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_chip_id == TEGRA20)
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tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
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if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30)
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tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
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if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114)
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tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
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}
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