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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-21 10:30:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-21 10:30:03 -0700 |
commit | f8974cb71310a05632aada76be6a27576d61e609 (patch) | |
tree | c0b6f59333796c95aa2de9a2eb755e9b68599b71 /drivers/of/base.c | |
parent | c207f3a43194e108dda43dc9a1ce507335cff6b9 (diff) | |
parent | 0f22dd395fc473cee252b9af50249b8e0f32fde7 (diff) | |
download | op-kernel-dev-f8974cb71310a05632aada76be6a27576d61e609.zip op-kernel-dev-f8974cb71310a05632aada76be6a27576d61e609.tar.gz |
Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull core device tree changes for Linux v3.4 from Grant Likely:
"This branch contains a minor documentation addition, a utility
function for parsing string properties needed by some of the new ARM
platforms, disables dynamic DT code that isn't used anywhere but on a
few PPC machines, and exports DT node compatible data to userspace via
UEVENT properties. Nothing earth shattering here."
* tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6:
of: Only compile OF_DYNAMIC on PowerPC pseries and iseries
arm/dts: OMAP3: Add omap3evm and am335xevm support
drivercore: Output common devicetree information in uevent
of: Add of_property_match_string() to find index into a string list
Diffstat (limited to 'drivers/of/base.c')
-rw-r--r-- | drivers/of/base.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 133908a..5806449 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -88,7 +88,7 @@ int of_n_size_cells(struct device_node *np) } EXPORT_SYMBOL(of_n_size_cells); -#if !defined(CONFIG_SPARC) /* SPARC doesn't do ref counting (yet) */ +#if defined(CONFIG_OF_DYNAMIC) /** * of_node_get - Increment refcount of a node * @node: Node to inc refcount, NULL is supported to @@ -161,7 +161,7 @@ void of_node_put(struct device_node *node) kref_put(&node->kref, of_node_release); } EXPORT_SYMBOL(of_node_put); -#endif /* !CONFIG_SPARC */ +#endif /* CONFIG_OF_DYNAMIC */ struct property *of_find_property(const struct device_node *np, const char *name, @@ -761,6 +761,42 @@ int of_property_read_string_index(struct device_node *np, const char *propname, } EXPORT_SYMBOL_GPL(of_property_read_string_index); +/** + * of_property_match_string() - Find string in a list and return index + * @np: pointer to node containing string list property + * @propname: string list property name + * @string: pointer to string to search for in string list + * + * This function searches a string list property and returns the index + * of a specific string value. + */ +int of_property_match_string(struct device_node *np, const char *propname, + const char *string) +{ + struct property *prop = of_find_property(np, propname, NULL); + size_t l; + int i; + const char *p, *end; + + if (!prop) + return -EINVAL; + if (!prop->value) + return -ENODATA; + + p = prop->value; + end = p + prop->length; + + for (i = 0; p < end; i++, p += l) { + l = strlen(p) + 1; + if (p + l > end) + return -EILSEQ; + pr_debug("comparing %s with %s\n", string, p); + if (strcmp(string, p) == 0) + return i; /* Found it; return index */ + } + return -ENODATA; +} +EXPORT_SYMBOL_GPL(of_property_match_string); /** * of_property_count_strings - Find and return the number of strings from a |