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| author | Rob Herring <robh@kernel.org> | 2023-03-28 15:15:57 -0500 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2023-04-13 17:46:35 -0500 |
| commit | c75a79491835c50ca61938ae1ebd3ba5598f7410 (patch) | |
| tree | a87517b093f73b412725b461af721e76d58946e8 /drivers/of/address.c | |
| parent | 6d32dadb11a6480be62c6ada901bbdcbda1775c9 (diff) | |
| download | linux-stable-c75a79491835c50ca61938ae1ebd3ba5598f7410.tar.gz linux-stable-c75a79491835c50ca61938ae1ebd3ba5598f7410.tar.bz2 linux-stable-c75a79491835c50ca61938ae1ebd3ba5598f7410.zip | |
of/address: Add of_range_to_resource() helper
A few users need to convert a specific "ranges" entry into a struct
resource. Add a helper to similar to of_address_to_resource(). The
existing of_pci_range_to_resource() helper isn't really PCI specific,
so it can be used with the CONFIG_PCI check dropped.
Link: https://lore.kernel.org/r/20230328-dt-address-helpers-v1-2-e2456c3e77ab@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 4c0b169ef9bf..b79f005834fc 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -229,9 +229,6 @@ int of_pci_range_to_resource(struct of_pci_range *range, res->parent = res->child = res->sibling = NULL; res->name = np->full_name; - if (!IS_ENABLED(CONFIG_PCI)) - return -ENOSYS; - if (res->flags & IORESOURCE_IO) { unsigned long port; err = pci_register_io_range(&np->fwnode, range->cpu_addr, @@ -264,6 +261,34 @@ invalid_range: EXPORT_SYMBOL(of_pci_range_to_resource); /* + * of_range_to_resource - Create a resource from a ranges entry + * @np: device node where the range belongs to + * @index: the 'ranges' index to convert to a resource + * @res: pointer to a valid resource that will be updated to + * reflect the values contained in the range. + * + * Returns ENOENT if the entry is not found or EINVAL if the range cannot be + * converted to resource. + */ +int of_range_to_resource(struct device_node *np, int index, struct resource *res) +{ + int ret, i = 0; + struct of_range_parser parser; + struct of_range range; + + ret = of_range_parser_init(&parser, np); + if (ret) + return ret; + + for_each_of_range(&parser, &range) + if (i++ == index) + return of_pci_range_to_resource(&range, np, res); + + return -ENOENT; +} +EXPORT_SYMBOL(of_range_to_resource); + +/* * ISA bus specific translator */ |