[RFC PATCH v3 1/5] dt: add of_get_child_count helper function
From: Rob Herring <hidden>
Date: 2011-12-20 18:35:09
Also in:
linux-devicetree, lkml
On 12/20/2011 11:40 AM, Dong Aisheng wrote:
From: Dong Aisheng <redacted> Currently most code to get child count in kernel are almost same, add a helper to implement this function for dt to use. --- Changes v1->v2: * change the name from of_get_child_number to of_get_child_count Signed-off-by: Dong Aisheng <redacted> Cc: Grant Likely <redacted> Cc: Rob Herring <redacted>
I assume you want this to go in with the rest of the series? If not, let me know. Acked-by: Rob Herring <redacted> Rob
quoted hunk ↗ jump to hunk
--- include/linux/of.h | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-)diff --git a/include/linux/of.h b/include/linux/of.h index 4948552..d0d91a1 100644 --- a/include/linux/of.h +++ b/include/linux/of.h@@ -189,6 +189,17 @@ extern struct device_node *of_get_next_child(const struct device_node *node, for (child = of_get_next_child(parent, NULL); child != NULL; \ child = of_get_next_child(parent, child)) +static inline int of_get_child_count(const struct device_node *np) +{ + struct device_node *child = NULL; + int num = 0; + + while ((child = of_get_next_child(np, child))) + num++; + + return num; +} + extern struct device_node *of_find_node_with_property( struct device_node *from, const char *prop_name); #define for_each_node_with_property(dn, prop_name) \@@ -262,6 +273,11 @@ static inline bool of_have_populated_dt(void) #define for_each_child_of_node(parent, child) \ while (0) +static inline int of_get_child_count(const struct device_node *np) +{ + return -ENOSYS; +} + static inline int of_device_is_compatible(const struct device_node *device, const char *name) {