diff options
| author | Patrice Chotard <patrice.chotard@st.com> | 2017-07-18 11:57:08 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2017-07-28 23:34:08 +0200 |
| commit | 642346ae269c3c5c54cf7e15c426c42f4df031da (patch) | |
| tree | 2ca4b749f8fe2965314dcde27c388c7eb4ce5ff2 /include/dm/read.h | |
| parent | 82a8a669b4f7159f1f3c3251c2fcb36965896290 (diff) | |
dm: core: add ofnode_count_phandle_with_args()
This function is usefull to get phandle number contained
in a property list.
For example, this allows to allocate the right amount
of memory to keep clock's reference contained into the
"clocks" property.
To implement it, either of_count_phandle_with_args() or
fdtdec_parse_phandle_with_args() are used respectively
for live tree and flat tree.
By passing index = -1, these 2 functions returns the
number of phandle contained into the property list.
Add also the dev_count_phandle_with_args() based on
ofnode_count_phandle_with_args()
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/dm/read.h')
| -rw-r--r-- | include/dm/read.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/dm/read.h b/include/dm/read.h index b86a2f5fec..d09b04d110 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -209,6 +209,24 @@ int dev_read_phandle_with_args(struct udevice *dev, const char *list_name, struct ofnode_phandle_args *out_args); /** + * dev_count_phandle_with_args() - Return phandle number in a list + * + * This function is usefull to get phandle number contained in a property list. + * For example, this allows to allocate the right amount of memory to keep + * clock's reference contained into the "clocks" property. + * + * + * @dev: device whose node containing a list + * @list_name: property name that contains a list + * @cells_name: property name that specifies phandles' arguments count + * @Returns number of phandle found on success, on error returns appropriate + * errno value. + */ + +int dev_count_phandle_with_args(struct udevice *dev, const char *list_name, + const char *cells_name); + +/** * dev_read_addr_cells() - Get the number of address cells for a device's node * * This walks back up the tree to find the closest #address-cells property @@ -416,6 +434,13 @@ static inline int dev_read_phandle_with_args(struct udevice *dev, out_args); } +static inline int dev_count_phandle_with_args(struct udevice *dev, + const char *list_name, const char *cells_name) +{ + return ofnode_count_phandle_with_args(dev_ofnode(dev), list_name, + cells_name); +} + static inline int dev_read_addr_cells(struct udevice *dev) { /* NOTE: this call should walk up the parent stack */ |