Register with kernel poweroff handler instead of setting pm_power_off
directly. Register as poweroff handler of last resort since the driver
does not really power off the system but executes a restart.
Drop remove function since it is no longer needed.
Cc: Sebastian Reichel <s...@kernel.org>
Cc: Dmitry Eremin-Solenikov <dbarysh...@gmail.com>
Cc: David Woodhouse <dw...@infradead.org>
Acked-by: Andrew Lunn <and...@lunn.ch>
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
v2:
- Use define to sepcify poweroff handler priority
- Use devm_register_power_off_handler
- Drop remove function since it is no longer needed
drivers/power/reset/restart-poweroff.c | 33 +++++++++++++--------------------
1 file changed, 13 insertions(+), 20 deletions(-)
diff --git a/drivers/power/reset/restart-poweroff.c
b/drivers/power/reset/restart-poweroff.c
index edd707e..e8f8e59 100644
--- a/drivers/power/reset/restart-poweroff.c
+++ b/drivers/power/reset/restart-poweroff.c
@@ -12,37 +12,31 @@
*/
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/notifier.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/module.h>
+#include <linux/pm.h>
#include <linux/reboot.h>
-#include <asm/system_misc.h>
-static void restart_poweroff_do_poweroff(void)
+static int restart_poweroff_do_poweroff(struct notifier_block *this,
+ unsigned long unused1, void *unused2)
{
reboot_mode = REBOOT_HARD;
machine_restart(NULL);
-}
-
-static int restart_poweroff_probe(struct platform_device *pdev)
-{
- /* If a pm_power_off function has already been added, leave it alone */
- if (pm_power_off != NULL) {
- dev_err(&pdev->dev,
- "pm_power_off function already registered");
- return -EBUSY;
- }
- pm_power_off = &restart_poweroff_do_poweroff;
- return 0;
+ return NOTIFY_DONE;
}
-static int restart_poweroff_remove(struct platform_device *pdev)
-{
- if (pm_power_off == &restart_poweroff_do_poweroff)
- pm_power_off = NULL;
+static struct notifier_block restart_power_off_handler = {
+ .notifier_call = restart_poweroff_do_poweroff,
+ .priority = POWEROFF_PRIORITY_FALLBACK,
+};
- return 0;
+static int restart_poweroff_probe(struct platform_device *pdev)
+{
+ return devm_register_power_off_handler(&pdev->dev,
+ &restart_power_off_handler);
}
static const struct of_device_id of_restart_poweroff_match[] = {
@@ -52,7 +46,6 @@ static const struct of_device_id of_restart_poweroff_match[]
= {
static struct platform_driver restart_poweroff_driver = {
.probe = restart_poweroff_probe,
- .remove = restart_poweroff_remove,
.driver = {
.name = "poweroff-restart",
.owner = THIS_MODULE,
--
1.9.1
--
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