diff options
| author | Chen-Yu Tsai <wenst@chromium.org> | 2024-11-06 17:33:29 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2024-11-27 12:04:01 +0100 |
| commit | 1fcc67e3a354865775355eafec1fb061a755c971 (patch) | |
| tree | 79d6df1b04a3b367ca0b1f518f49643565a2db32 /include | |
| parent | 81de291d86b704de1809cfb06672902d003cf3a3 (diff) | |
of: base: Add for_each_child_of_node_with_prefix()
There are cases where drivers would go through child device nodes and
operate on only the ones whose node name starts with a given prefix.
Provide a helper for these users. This will mainly be used in a
subsequent patch that implements a hardware component prober for I2C
busses.
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/of.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h index d0307e3b093d..f921786cb8ac 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -289,6 +289,9 @@ extern struct device_node *of_get_parent(const struct device_node *node); extern struct device_node *of_get_next_parent(struct device_node *node); extern struct device_node *of_get_next_child(const struct device_node *node, struct device_node *prev); +extern struct device_node *of_get_next_child_with_prefix(const struct device_node *node, + struct device_node *prev, + const char *prefix); extern struct device_node *of_get_next_available_child( const struct device_node *node, struct device_node *prev); extern struct device_node *of_get_next_reserved_child( @@ -1468,6 +1471,12 @@ static inline int of_property_read_s32(const struct device_node *np, child != NULL; \ child = of_get_next_child(parent, child)) +#define for_each_child_of_node_with_prefix(parent, child, prefix) \ + for (struct device_node *child __free(device_node) = \ + of_get_next_child_with_prefix(parent, NULL, prefix); \ + child != NULL; \ + child = of_get_next_child_with_prefix(parent, child, prefix)) + #define for_each_available_child_of_node(parent, child) \ for (child = of_get_next_available_child(parent, NULL); child != NULL; \ child = of_get_next_available_child(parent, child)) |