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of: Add standard property for poweroff capability 

Several drivers create their own devicetree property when they register
poweroff capabilities. This is for example the case for mfd, regulator
or power drivers which define "vendor,system-power-controller" property.
This patch adds support for a standard property "poweroff-source"
which marks the device as able to shutdown the system.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Romain Perier 2014-10-14 06:31:09 +00:00 committed by Mark Brown
parent f114040e3e
commit a4b4e0461e
1 changed files with 11 additions and 0 deletions
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11
include/linux/of.h
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@ -866,4 +866,15 @@ static inline int of_changeset_update_property(struct of_changeset *ocs,
/* CONFIG_OF_RESOLVE api */
extern int of_resolve_phandles(struct device_node *tree);
/**
* of_system_has_poweroff_source - Tells if poweroff-source is found for device_node
* @np: Pointer to the given device_node
*
* return true if present false otherwise
*/
static inline bool of_system_has_poweroff_source(const struct device_node *np)
{
return of_property_read_bool(np, "poweroff-source");
}
#endif /* _LINUX_OF_H */