b82b6cca48
The only place where the time is invalid is when the ACPI_CSTATE_FFH entry method is not set. Otherwise for all the drivers, the time can be correctly measured. Instead of duplicating the CPUIDLE_FLAG_TIME_VALID flag in all the drivers for all the states, just invert the logic by replacing it by the flag CPUIDLE_FLAG_TIME_INVALID, hence we can set this flag only for the acpi idle driver, remove the former flag from all the drivers and invert the logic with this flag in the different governor. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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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 <asm/cpuidle.h>
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#include <asm/suspend.h>
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#include <asm/psci.h>
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static int calxeda_idle_finish(unsigned long val)
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{
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const struct psci_power_state ps = {
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.type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
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};
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return psci_ops.cpu_suspend(ps, __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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.owner = THIS_MODULE,
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},
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.probe = calxeda_cpuidle_probe,
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};
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module_platform_driver(calxeda_cpuidle_plat_driver);
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