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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
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*/
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#include <asm/firmware.h>
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#include <linux/tick.h>
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#include <linux/cpuidle.h>
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#include <linux/cpu_pm.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/firmware/trusted_foundations.h>
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#include <asm/cpuidle.h>
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#include <asm/smp_plat.h>
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#include <asm/suspend.h>
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#include <asm/psci.h>
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#include "cpuidle.h"
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#include "pm.h"
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#include "sleep.h"
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#ifdef CONFIG_PM_SLEEP
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#define TEGRA114_MAX_STATES 2
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#else
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#define TEGRA114_MAX_STATES 1
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#endif
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#ifdef CONFIG_PM_SLEEP
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static int tegra114_idle_power_down(struct cpuidle_device *dev,
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struct cpuidle_driver *drv,
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int index)
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{
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local_fiq_disable();
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tegra_set_cpu_in_lp2();
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cpu_pm_enter();
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call_firmware_op(prepare_idle, TF_PM_MODE_LP2_NOFLUSH_L2);
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/* Do suspend by ourselves if the firmware does not implement it */
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if (call_firmware_op(do_idle, 0) == -ENOSYS)
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cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
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cpu_pm_exit();
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tegra_clear_cpu_in_lp2();
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local_fiq_enable();
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return index;
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}
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static void tegra114_idle_enter_s2idle(struct cpuidle_device *dev,
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struct cpuidle_driver *drv,
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int index)
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{
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tegra114_idle_power_down(dev, drv, index);
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}
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#endif
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static struct cpuidle_driver tegra_idle_driver = {
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.name = "tegra_idle",
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.owner = THIS_MODULE,
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.state_count = TEGRA114_MAX_STATES,
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.states = {
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[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
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#ifdef CONFIG_PM_SLEEP
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[1] = {
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.enter = tegra114_idle_power_down,
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.enter_s2idle = tegra114_idle_enter_s2idle,
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.exit_latency = 500,
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.target_residency = 1000,
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.flags = CPUIDLE_FLAG_TIMER_STOP,
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.power_usage = 0,
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.name = "powered-down",
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.desc = "CPU power gated",
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},
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#endif
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},
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};
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int __init tegra114_cpuidle_init(void)
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{
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if (!psci_smp_available())
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return cpuidle_register(&tegra_idle_driver, NULL);
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return 0;
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}
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