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of: Add of_phandle_args_equal() helper

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Add a helper comparing two "struct of_phandle_args" to avoid
reinventing the wheel.

Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240129115216.96479-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Krzysztof Kozlowski 2024-01-29 12:52:11 +01:00 committed by Philipp Zabel
parent a6166a4da5
commit 26ea8511c8
1 changed files with 16 additions and 0 deletions
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16
include/linux/of.h
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@ -1065,6 +1065,22 @@ static inline int of_parse_phandle_with_optional_args(const struct device_node *
0, index, out_args);
}
/**
* of_phandle_args_equal() - Compare two of_phandle_args
* @a1: First of_phandle_args to compare
* @a2: Second of_phandle_args to compare
*
* Return: True if a1 and a2 are the same (same node pointer, same phandle
* args), false otherwise.
*/
static inline bool of_phandle_args_equal(const struct of_phandle_args *a1,
const struct of_phandle_args *a2)
{
return a1->np == a2->np &&
a1->args_count == a2->args_count &&
!memcmp(a1->args, a2->args, sizeof(a1->args[0]) * a1->args_count);
}
/**
* of_property_count_u8_elems - Count the number of u8 elements in a property
*