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of: Add of_property_present() helper

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[ Upstream commit 9cbad37ce8122de32a1529e394b468bc101c9e7f ]

Add an of_property_present() function similar to
fwnode_property_present(). of_property_read_bool() could be used
directly, but it is cleaner to not use it on non-boolean properties.

Reviewed-by: Frank Rowand <frowand.list@gmail.com>
Tested-by: Frank Rowand <frowand.list@gmail.com>
Link: https://lore.kernel.org/all/20230215215547.691573-1-robh@kernel.org/
Signed-off-by: Rob Herring <robh@kernel.org>
Stable-dep-of: 171eb6f71e9e ("ASoC: meson: meson-card-utils: use of_property_present() for DT parsing")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rob Herring 2023-02-09 15:35:01 -06:00 • committed by Greg Kroah-Hartman
commit f1195eb224
1 changed files with 16 additions and 1 deletions
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17
include/linux/of.h
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@ -1044,7 +1044,8 @@ static inline int of_property_read_string_index(const struct device_node *np,
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
*
* Search for a property in a device node.
* Search for a boolean property in a device node. Usage on non-boolean
* property types is deprecated.
*
* Return: true if the property exists false otherwise.
*/
@ -1056,6 +1057,20 @@ static inline bool of_property_read_bool(const struct device_node *np,
return prop ? true : false;
}
/**
* of_property_present - Test if a property is present in a node
* @np: device node to search for the property.
* @propname: name of the property to be searched.
*
* Test for a property present in a device node.
*
* Return: true if the property exists false otherwise.
*/
static inline bool of_property_present(const struct device_node *np, const char *propname)
{
return of_property_read_bool(np, propname);
}
/**
* of_property_read_u8_array - Find and read an array of u8 from a property.
*