9952f6918d
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>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2012 Calxeda, Inc.
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*
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* Based on arch/arm/plat-mxc/cpuidle.c: #v3.7
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* Copyright 2012 Freescale Semiconductor, Inc.
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* Copyright 2012 Linaro Ltd.
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*
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* Maintainer: Rob Herring <rob.herring@calxeda.com>
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*/
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#include <linux/cpuidle.h>
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#include <linux/cpu_pm.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/platform_device.h>
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#include <linux/psci.h>
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#include <asm/cpuidle.h>
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#include <asm/suspend.h>
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#include <uapi/linux/psci.h>
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#define CALXEDA_IDLE_PARAM \
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((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
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(0 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
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(PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
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static int calxeda_idle_finish(unsigned long val)
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{
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return psci_ops.cpu_suspend(CALXEDA_IDLE_PARAM, __pa(cpu_resume));
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}
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static int calxeda_pwrdown_idle(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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cpu_pm_enter();
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cpu_suspend(0, calxeda_idle_finish);
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cpu_pm_exit();
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return index;
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}
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static struct cpuidle_driver calxeda_idle_driver = {
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.name = "calxeda_idle",
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.states = {
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ARM_CPUIDLE_WFI_STATE,
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{
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.name = "PG",
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.desc = "Power Gate",
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.exit_latency = 30,
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.power_usage = 50,
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.target_residency = 200,
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.enter = calxeda_pwrdown_idle,
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},
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},
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.state_count = 2,
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};
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static int calxeda_cpuidle_probe(struct platform_device *pdev)
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{
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return cpuidle_register(&calxeda_idle_driver, NULL);
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}
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static struct platform_driver calxeda_cpuidle_plat_driver = {
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.driver = {
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.name = "cpuidle-calxeda",
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},
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.probe = calxeda_cpuidle_probe,
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};
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builtin_platform_driver(calxeda_cpuidle_plat_driver);
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