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1f3e18ec95
Rename some of the recently exposed PM functions, prefixing them with "tegra_pm_" in order to make the naming of the PM functions consistent. Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com> Tested-by: Peter Geis <pgwipeout@gmail.com> Tested-by: Jasper Korten <jja2000@gmail.com> Tested-by: David Heidelberg <david@ixit.cz> Tested-by: Nicolas Chauvet <kwizart@gmail.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
91 lines
1.9 KiB
C
91 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 <soc/tegra/pm.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 "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_pm_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_pm_secondary_cpu_suspend);
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cpu_pm_exit();
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tegra_pm_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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