Release 4.17 drivers/cpuidle/cpuidle-exynos.c
/*
* Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Coupled cpuidle support based on the work of:
* Colin Cross <ccross@android.com>
* Daniel Lezcano <daniel.lezcano@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/cpuidle.h>
#include <linux/cpu_pm.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/platform_data/cpuidle-exynos.h>
#include <asm/suspend.h>
#include <asm/cpuidle.h>
static atomic_t exynos_idle_barrier;
static struct cpuidle_exynos_data *exynos_cpuidle_pdata;
static void (*exynos_enter_aftr)(void);
static int exynos_enter_coupled_lowpower(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
int ret;
exynos_cpuidle_pdata->pre_enter_aftr();
/*
* Waiting all cpus to reach this point at the same moment
*/
cpuidle_coupled_parallel_barrier(dev, &exynos_idle_barrier);
/*
* Both cpus will reach this point at the same time
*/
ret = dev->cpu ? exynos_cpuidle_pdata->cpu1_powerdown()
: exynos_cpuidle_pdata->cpu0_enter_aftr();
if (ret)
index = ret;
/*
* Waiting all cpus to finish the power sequence before going further
*/
cpuidle_coupled_parallel_barrier(dev, &exynos_idle_barrier);
exynos_cpuidle_pdata->post_enter_aftr();
return index;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bartlomiej Zolnierkiewicz | 78 | 100.00% | 1 | 100.00% |
| Total | 78 | 100.00% | 1 | 100.00% |
static int exynos_enter_lowpower(struct cpuidle_device *dev,
struct cpuidle_driver *drv,
int index)
{
int new_index = index;
/* AFTR can only be entered when cores other than CPU0 are offline */
if (num_online_cpus() > 1 || dev->cpu != 0)
new_index = drv->safe_state_index;
if (new_index == 0)
return arm_cpuidle_simple_enter(dev, drv, new_index);
exynos_enter_aftr();
return new_index;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Amit Daniel Kachhap | 55 | 83.33% | 2 | 40.00% |
| Bartlomiej Zolnierkiewicz | 7 | 10.61% | 1 | 20.00% |
| Tomasz Figa | 3 | 4.55% | 1 | 20.00% |
| Daniel Lezcano | 1 | 1.52% | 1 | 20.00% |
| Total | 66 | 100.00% | 5 | 100.00% |
static struct cpuidle_driver exynos_idle_driver = {
.name = "exynos_idle",
.owner = THIS_MODULE,
.states = {
[0] = ARM_CPUIDLE_WFI_STATE,
[1] = {
.enter = exynos_enter_lowpower,
.exit_latency = 300,
.target_residency = 100000,
.name = "C1",
.desc = "ARM power down",
},
},
.state_count = 2,
.safe_state_index = 0,
};
static struct cpuidle_driver exynos_coupled_idle_driver = {
.name = "exynos_coupled_idle",
.owner = THIS_MODULE,
.states = {
[0] = ARM_CPUIDLE_WFI_STATE,
[1] = {
.enter = exynos_enter_coupled_lowpower,
.exit_latency = 5000,
.target_residency = 10000,
.flags = CPUIDLE_FLAG_COUPLED |
CPUIDLE_FLAG_TIMER_STOP,
.name = "C1",
.desc = "ARM power down",
},
},
.state_count = 2,
.safe_state_index = 0,
};
static int exynos_cpuidle_probe(struct platform_device *pdev)
{
int ret;
if (IS_ENABLED(CONFIG_SMP) &&
(of_machine_is_compatible("samsung,exynos4210") ||
of_machine_is_compatible("samsung,exynos3250"))) {
exynos_cpuidle_pdata = pdev->dev.platform_data;
ret = cpuidle_register(&exynos_coupled_idle_driver,
cpu_possible_mask);
} else {
exynos_enter_aftr = (void *)(pdev->dev.platform_data);
ret = cpuidle_register(&exynos_idle_driver, NULL);
}
if (ret) {
dev_err(&pdev->dev, "failed to register cpuidle driver\n");
return ret;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bartlomiej Zolnierkiewicz | 40 | 39.22% | 3 | 27.27% |
| Daniel Lezcano | 25 | 24.51% | 4 | 36.36% |
| Jaecheol Lee | 22 | 21.57% | 1 | 9.09% |
| Marek Szyprowski | 7 | 6.86% | 1 | 9.09% |
| Jingoo Han | 6 | 5.88% | 1 | 9.09% |
| Deepthi Dharwar | 2 | 1.96% | 1 | 9.09% |
| Total | 102 | 100.00% | 11 | 100.00% |
static struct platform_driver exynos_cpuidle_driver = {
.probe = exynos_cpuidle_probe,
.driver = {
.name = "exynos_cpuidle",
},
};
builtin_platform_driver(exynos_cpuidle_driver);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bartlomiej Zolnierkiewicz | 244 | 52.36% | 4 | 21.05% |
| Daniel Lezcano | 105 | 22.53% | 5 | 26.32% |
| Amit Daniel Kachhap | 62 | 13.30% | 2 | 10.53% |
| Jaecheol Lee | 30 | 6.44% | 1 | 5.26% |
| Marek Szyprowski | 7 | 1.50% | 1 | 5.26% |
| Jingoo Han | 6 | 1.29% | 1 | 5.26% |
| Tomasz Figa | 3 | 0.64% | 1 | 5.26% |
| Kyungmin Park | 3 | 0.64% | 1 | 5.26% |
| Paul Gortmaker | 2 | 0.43% | 1 | 5.26% |
| Deepthi Dharwar | 2 | 0.43% | 1 | 5.26% |
| Arnd Bergmann | 2 | 0.43% | 1 | 5.26% |
| Total | 466 | 100.00% | 19 | 100.00% |
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