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of: Add standard property for poweroff capability

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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>
This commit is contained in:
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 */