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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2020-05-02 11:35:09 +0200 |
|---|---|---|
| committer | Marek Vasut <marek.vasut+renesas@gmail.com> | 2020-05-02 12:32:28 +0200 |
| commit | 89b84b85e9c5d80e1b5eb5b52cc6596ba32135c7 (patch) | |
| tree | 1c0dfd8bd3db057bf096172aeda6ee77ea22aefd | |
| parent | c693f212c5b0433b3a49a89d87cbff28bf78eb87 (diff) | |
| download | u-boot-89b84b85e9c5d80e1b5eb5b52cc6596ba32135c7.tar.gz | |
dm: core: Add function to get child count of ofnode or device
This patch add function used to get the child count of
a ofnode or a device
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Weijie Gao <weijie.gao@mediatek.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/core/ofnode.c | 11 | ||||
| -rw-r--r-- | drivers/core/read.c | 5 | ||||
| -rw-r--r-- | include/dm/ofnode.h | 8 | ||||
| -rw-r--r-- | include/dm/read.h | 13 |
4 files changed, 37 insertions, 0 deletions
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index 20871a6815..e3c42dae5c 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -474,6 +474,17 @@ ofnode ofnode_get_chosen_node(const char *name) return ofnode_path(prop); } +int ofnode_get_child_count(ofnode parent) +{ + ofnode child; + int num = 0; + + ofnode_for_each_subnode(child, parent) + num++; + + return num; +} + static int decode_timing_property(ofnode node, const char *name, struct timing_entry *result) { diff --git a/drivers/core/read.c b/drivers/core/read.c index 47b8e03446..3d421f7a69 100644 --- a/drivers/core/read.c +++ b/drivers/core/read.c @@ -352,3 +352,8 @@ fdt_addr_t dev_read_addr_pci(const struct udevice *dev) return addr; } + +int dev_get_child_count(const struct udevice *dev) +{ + return ofnode_get_child_count(dev_ofnode(dev)); +} diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index 618fc10390..a0d3df7786 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -880,6 +880,14 @@ ofnode ofnode_by_prop_value(ofnode from, const char *propname, node = ofnode_next_subnode(node)) /** + * ofnode_get_child_count() - get the child count of a ofnode + * + * @node: valid node to get its child count + * @return the number of subnodes + */ +int ofnode_get_child_count(ofnode parent); + +/** * ofnode_translate_address() - Translate a device-tree address * * Translate an address from the device-tree into a CPU physical address. This diff --git a/include/dm/read.h b/include/dm/read.h index 03c15b8550..b952551d55 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -669,6 +669,14 @@ u64 dev_translate_dma_address(const struct udevice *dev, */ int dev_read_alias_highest_id(const char *stem); +/** + * dev_get_child_count() - get the child count of a device + * + * @dev: device to use for interation (struct udevice *) + * @return the count of child subnode + */ +int dev_get_child_count(const struct udevice *dev); + #else /* CONFIG_DM_DEV_READ_INLINE is enabled */ static inline int dev_read_u32(const struct udevice *dev, @@ -978,6 +986,11 @@ static inline int dev_read_alias_highest_id(const char *stem) return fdtdec_get_alias_highest_id(gd->fdt_blob, stem); } +static inline int dev_get_child_count(const struct udevice *dev) +{ + return ofnode_get_child_count(dev_ofnode(dev)); +} + #endif /* CONFIG_DM_DEV_READ_INLINE */ /** |