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soc: rockchip: system_monitor: Handle devices properly during system sleep

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Change-Id: I192ae8f8d62a4786f855aa4c430f6e6d47ff72af
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
This commit is contained in:
Finley Xiao
2019-04-02 18:09:19 +08:00
committed by Tao Huang
parent e321bfaca5
commit 38e71674b5
1 changed files with 34 additions and 0 deletions
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34
drivers/soc/rockchip/rockchip_system_monitor.c
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@@ -14,6 +14,7 @@
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <linux/thermal.h>
#include <soc/rockchip/rockchip-system-status.h>
@@ -63,6 +64,7 @@ static DEFINE_MUTEX(cpu_on_off_mutex);
static LIST_HEAD(video_info_list);
static struct system_monitor *system_monitor;
static atomic_t monitor_in_suspend;
static BLOCKING_NOTIFIER_HEAD(system_status_notifier_list);
@@ -476,6 +478,9 @@ out:
static void rockchip_system_monitor_thermal_check(struct work_struct *work)
{
if (atomic_read(&monitor_in_suspend))
return;
rockchip_system_monitor_thermal_update();
}
@@ -505,6 +510,32 @@ static int rockchip_system_status_notifier(struct notifier_block *nb,
return NOTIFY_OK;
}
static int monitor_pm_notify(struct notifier_block *nb,
unsigned long mode, void *_unused)
{
switch (mode) {
case PM_HIBERNATION_PREPARE:
case PM_RESTORE_PREPARE:
case PM_SUSPEND_PREPARE:
atomic_set(&monitor_in_suspend, 1);
break;
case PM_POST_HIBERNATION:
case PM_POST_RESTORE:
case PM_POST_SUSPEND:
if (system_monitor->tz)
rockchip_system_monitor_thermal_update();
atomic_set(&monitor_in_suspend, 0);
break;
default:
break;
}
return 0;
}
static struct notifier_block monitor_pm_nb = {
.notifier_call = monitor_pm_notify,
};
static int rockchip_system_monitor_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -537,6 +568,9 @@ static int rockchip_system_monitor_probe(struct platform_device *pdev)
rockchip_system_status_notifier;
rockchip_register_system_status_notifier(&system_monitor->status_nb);
if (register_pm_notifier(&monitor_pm_nb))
dev_err(dev, "failed to register suspend notifier\n");
return 0;
}