| Message ID | 1412659726-29957-21-git-send-email-linux@roeck-us.net (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Mon, Oct 06, 2014 at 10:28:22PM -0700, Guenter Roeck wrote: > Register with kernel poweroff handler instead of seting 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. I would not say last resort, this is how it is designed to work. There is no way to turn the power off from with linux, it is designed that u-boot will put the hardware into minimal power consumption until the "power" button is pressed. Other than that, Acked-by: Andrew Lunn <andrew@lunn.ch> Thanks Andrew > > Cc: Sebastian Reichel <sre@kernel.org> > Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> > Cc: David Woodhouse <dwmw2@infradead.org> > Signed-off-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/power/reset/restart-poweroff.c | 25 ++++++++++++------------- > 1 file changed, 12 insertions(+), 13 deletions(-) > > diff --git a/drivers/power/reset/restart-poweroff.c b/drivers/power/reset/restart-poweroff.c > index edd707e..5437697 100644 > --- a/drivers/power/reset/restart-poweroff.c > +++ b/drivers/power/reset/restart-poweroff.c > @@ -12,35 +12,34 @@ > */ > #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); > + > + return NOTIFY_DONE; > } > > +static struct notifier_block restart_poweroff_handler = { > + .notifier_call = restart_poweroff_do_poweroff, > +}; > + > 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 register_poweroff_handler(&restart_poweroff_handler); > } > > static int restart_poweroff_remove(struct platform_device *pdev) > { > - if (pm_power_off == &restart_poweroff_do_poweroff) > - pm_power_off = NULL; > + unregister_poweroff_handler(&restart_poweroff_handler); > > return 0; > } > -- > 1.9.1 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
diff --git a/drivers/power/reset/restart-poweroff.c b/drivers/power/reset/restart-poweroff.c index edd707e..5437697 100644 --- a/drivers/power/reset/restart-poweroff.c +++ b/drivers/power/reset/restart-poweroff.c @@ -12,35 +12,34 @@ */ #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); + + return NOTIFY_DONE; } +static struct notifier_block restart_poweroff_handler = { + .notifier_call = restart_poweroff_do_poweroff, +}; + 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 register_poweroff_handler(&restart_poweroff_handler); } static int restart_poweroff_remove(struct platform_device *pdev) { - if (pm_power_off == &restart_poweroff_do_poweroff) - pm_power_off = NULL; + unregister_poweroff_handler(&restart_poweroff_handler); return 0; }
Register with kernel poweroff handler instead of seting 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. Cc: Sebastian Reichel <sre@kernel.org> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- drivers/power/reset/restart-poweroff.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-)