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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 <benh@kernel.crashing.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent e2413a7d

drivers/of/base.c

+22 −0
Original line number Diff line number Diff line
@@ -493,6 +493,28 @@ int of_device_is_compatible(const struct device_node *device, 
}

EXPORT_SYMBOL(of_device_is_compatible);



/** 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;

		compat++;

	}



	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.

include/linux/of.h

+2 −0
Original line number Diff line number Diff line
@@ -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,