Messages in this thread Patch in this message |  | | From | Guenter Roeck <> | Subject | [PATCH v2 22/47] power/reset: restart-poweroff: Register with kernel poweroff handler | Date | Mon, 20 Oct 2014 21:12:38 -0700 |
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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 <sre@kernel.org> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Acked-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@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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