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OF: base: import property iterators from Linux OF API 

This imports of_prop_next_u32, of_prop_next_string, and the corresponding
for_property_for_each_ helpers from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
This commit is contained in:
Sebastian Hesselbarth 2013-06-14 17:34:23 +02:00 committed by Sascha Hauer
parent a0b6c0d00a
commit 2fe4a860eb
2 changed files with 84 additions and 0 deletions
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41
drivers/of/base.c
View File

@ -797,6 +797,47 @@ int of_property_count_strings(struct device_node *np, const char *propname)
}
EXPORT_SYMBOL_GPL(of_property_count_strings);
const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
u32 *pu)
{
const void *curv = cur;
if (!prop)
return NULL;
if (!cur) {
curv = prop->value;
goto out_val;
}
curv += sizeof(*cur);
if (curv >= prop->value + prop->length)
return NULL;
out_val:
*pu = be32_to_cpup(curv);
return curv;
}
EXPORT_SYMBOL_GPL(of_prop_next_u32);
const char *of_prop_next_string(struct property *prop, const char *cur)
{
const void *curv = cur;
if (!prop)
return NULL;
if (!cur)
return prop->value;
curv += strlen(cur) + 1;
if (curv >= prop->value + prop->length)
return NULL;
return curv;
}
EXPORT_SYMBOL_GPL(of_prop_next_string);
/**
* of_property_write_bool - Create/Delete empty (bool) property.
*

43
include/of.h
View File

@ -207,6 +207,10 @@ extern int of_property_match_string(struct device_node *np,
extern int of_property_count_strings(struct device_node *np,
const char *propname);
extern const __be32 *of_prop_next_u32(struct property *prop,
const __be32 *cur, u32 *pu);
extern const char *of_prop_next_string(struct property *prop, const char *cur);
extern int of_property_write_bool(struct device_node *np,
const char *propname, const bool value);
extern int of_property_write_u8_array(struct device_node *np,
@ -363,6 +367,18 @@ static inline int of_property_count_strings(struct device_node *np,
return -ENOSYS;
}
static inline const __be32 *of_prop_next_u32(struct property *prop,
const __be32 *cur, u32 *pu)
{
return 0;
}
static inline const char *of_prop_next_string(struct property *prop,
const char *cur)
{
return NULL;
}
static inline int of_property_write_bool(struct device_node *np,
const char *propname, const bool value)
{
@ -536,6 +552,33 @@ static inline int of_property_read_u32(const struct device_node *np,
return of_property_read_u32_array(np, propname, out_value, 1);
}
/*
* struct property *prop;
* const __be32 *p;
* u32 u;
*
* of_property_for_each_u32(np, "propname", prop, p, u)
* printk("U32 value: %x\n", u);
*/
#define of_property_for_each_u32(np, propname, prop, p, u) \
for (prop = of_find_property(np, propname, NULL), \
p = of_prop_next_u32(prop, NULL, &u); \
p; \
p = of_prop_next_u32(prop, p, &u))
/*
* struct property *prop;
* const char *s;
*
* of_property_for_each_string(np, "propname", prop, s)
* printk("String value: %s\n", s);
*/
#define of_property_for_each_string(np, propname, prop, s) \
for (prop = of_find_property(np, propname, NULL), \
s = of_prop_next_string(prop, NULL); \
s; \
s = of_prop_next_string(prop, s))
static inline int of_property_write_u8(struct device_node *np,
const char *propname, u8 value)
{