diff options
Diffstat (limited to 'include/dm/read.h')
| -rw-r--r-- | include/dm/read.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/include/dm/read.h b/include/dm/read.h index 77d3bc8db5..03c15b8550 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -495,6 +495,42 @@ const void *dev_read_prop(const struct udevice *dev, const char *propname, int *lenp); /** + * dev_read_first_prop()- get the reference of the first property + * + * Get reference to the first property of the node, it is used to iterate + * and read all the property with dev_read_prop_by_prop(). + * + * @dev: device to check + * @prop: place to put argument reference + * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found + */ +int dev_read_first_prop(const struct udevice *dev, struct ofprop *prop); + +/** + * ofnode_get_next_property() - get the reference of the next property + * + * Get reference to the next property of the node, it is used to iterate + * and read all the property with dev_read_prop_by_prop(). + * + * @prop: reference of current argument and place to put reference of next one + * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found + */ +int dev_read_next_prop(struct ofprop *prop); + +/** + * dev_read_prop_by_prop() - get a pointer to the value of a property + * + * Get value for the property identified by the provided reference. + * + * @prop: reference on property + * @propname: If non-NULL, place to property name on success, + * @lenp: If non-NULL, place to put length on success + * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found + */ +const void *dev_read_prop_by_prop(struct ofprop *prop, + const char **propname, int *lenp); + +/** * dev_read_alias_seq() - Get the alias sequence number of a node * * This works out whether a node is pointed to by an alias, and if so, the @@ -860,6 +896,23 @@ static inline const void *dev_read_prop(const struct udevice *dev, return ofnode_get_property(dev_ofnode(dev), propname, lenp); } +static inline int dev_read_first_prop(const struct udevice *dev, struct ofprop *prop) +{ + return ofnode_get_first_property(dev_ofnode(dev), prop); +} + +static inline int dev_read_next_prop(struct ofprop *prop) +{ + return ofnode_get_next_property(prop); +} + +static inline const void *dev_read_prop_by_prop(struct ofprop *prop, + const char **propname, + int *lenp) +{ + return ofnode_get_property_by_prop(prop, propname, lenp); +} + static inline int dev_read_alias_seq(const struct udevice *dev, int *devnump) { return fdtdec_get_alias_seq(gd->fdt_blob, dev->uclass->uc_drv->name, @@ -941,4 +994,18 @@ static inline int dev_read_alias_highest_id(const char *stem) ofnode_valid(subnode); \ subnode = ofnode_next_subnode(subnode)) +/** + * dev_for_each_property() - Helper function to iterate through property + * + * This creates a for() loop which works through the property in a device's + * device-tree node. + * + * @prop: struct ofprop holding the current property + * @dev: device to use for interation (struct udevice *) + */ +#define dev_for_each_property(prop, dev) \ + for (int ret_prop = dev_read_first_prop(dev, &prop); \ + !ret_prop; \ + ret_prop = dev_read_next_prop(&prop)) + #endif |