Commit b9c13fe3 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Michael Ellerman
Browse files

dt: Add of_device_compatible_match()

This provides an equivalent of of_fdt_match() for non-flat trees.

This is more practical than matching an array of of_device_id structs
when converting a bunch of existing users of of_fdt_match().
Signed-off-by: default avatarBenjamin Herrenschmidt <>
Acked-by: default avatarRob Herring <>
Signed-off-by: default avatarMichael Ellerman <>
parent e2413a7d
......@@ -493,6 +493,28 @@ int of_device_is_compatible(const struct device_node *device,
/** Checks if the device is compatible with any of the entries in
* a NULL terminated array of strings. Returns the best match
* score or 0.
int of_device_compatible_match(struct device_node *device,
const char *const *compat)
unsigned int tmp, score = 0;
if (!compat)
return 0;
while (*compat) {
tmp = of_device_is_compatible(device, *compat);
if (tmp > score)
score = tmp;
return score;
* of_machine_is_compatible - Test root of device tree for a given compatible value
* @compat: compatible string to look for in root node's compatible property.
......@@ -324,6 +324,8 @@ extern int of_property_read_string_helper(const struct device_node *np,
const char **out_strs, size_t sz, int index);
extern int of_device_is_compatible(const struct device_node *device,
const char *);
extern int of_device_compatible_match(struct device_node *device,
const char *const *compat);
extern bool of_device_is_available(const struct device_node *device);
extern bool of_device_is_big_endian(const struct device_node *device);
extern const void *of_get_property(const struct device_node *node,
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