Messages in this thread Patch in this message | | | From | Lukas Wunner <> | Date | Sun, 15 Jan 2017 21:03:45 +0100 | Subject | [PATCH v5 6/8] PM / sleep: Define constant for direct_complete |
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From: Chen Yu <yu.c.chen@intel.com>
The PM core introduced the ability to keep devices runtime suspended during the entire system sleep process with commit aae4518b3124 ("PM / sleep: Mechanism to avoid resuming runtime-suspended devices unnecessarily").
Drivers opt in to this so-called "direct_complete" mechanism by returning a positive value from their ->prepare hook. Usually this is achieved with a "return 1;" statement, which looks somewhat cryptic to readers not intimately familiar with the PM core.
Improve clarity by defining a DPM_DIRECT_COMPLETE constant which drivers may use instead.
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Lee Jones <lee.jones@linaro.org> Signed-off-by: Chen Yu <yu.c.chen@intel.com> [LW: separate this hunk out of mfd patch, add commit message] Signed-off-by: Lukas Wunner <lukas@wunner.de> --- include/linux/pm.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/pm.h b/include/linux/pm.h index f926af41e122..2d651a30b35c 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -788,4 +788,11 @@ enum dpm_order { DPM_ORDER_DEV_LAST, }; +/* + * Return this from system suspend/hibernation ->prepare() callback to + * request the core to leave the device runtime-suspended during system + * suspend if possible. + */ +#define DPM_DIRECT_COMPLETE 1 + #endif /* _LINUX_PM_H */ -- 2.11.0
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