tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
of/address: Add of_find_matching_node_by_address helper
of_find_matching_node_by_address() can be used to find a device tree
node for a device at a specific address.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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drivers/of/address.c
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drivers/of/address.c
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}
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EXPORT_SYMBOL_GPL(of_address_to_resource);
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struct device_node *of_find_matching_node_by_address(struct device_node *from,
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const struct of_device_id *matches,
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u64 base_address)
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{
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struct device_node *dn = of_find_matching_node(from, matches);
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struct resource res;
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while (dn) {
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if (of_address_to_resource(dn, 0, &res))
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continue;
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if (res.start == base_address)
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return dn;
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dn = of_find_matching_node(dn, matches);
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}
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return NULL;
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}
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/**
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* of_iomap - Maps the memory mapped IO for a given device_node
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include/linux/of_address.h
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include/linux/of_address.h
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extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
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extern int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r);
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extern struct device_node *of_find_matching_node_by_address(
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struct device_node *from,
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const struct of_device_id *matches,
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u64 base_address);
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extern void __iomem *of_iomap(struct device_node *device, int index);
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/* Extract an address from a device, returns the region size and