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    SubjectRe: [PATCH V3 1/1] dt: add of_get_child_count helper function
    On 02/11/2012 11:22 AM, Dong Aisheng wrote:
    > Currently most code to get child count in kernel are almost same,
    > add a helper to implement this function for dt to use.
    >
    > Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
    > Cc: Grant Likely <grant.likely@secretlab.ca>
    > Cc: Rob Herring <rob.herring@calxeda.com>
    >
    > ---
    > Hi Rob,
    >
    > Since my imx pinctrl driver series still depends on the pinctrl core dt
    > binding patch which is still not in mainline, i'd like this pure dt patch
    > go separately first in case others want to use.
    >

    Applied for 3.4.

    Rob

    > changes v2->v3:
    > Addressed some people's comments:
    > * do not use assignment as expression
    > * return 0 for non-dt case
    >
    > Changes v1->v2:
    > * change the name from of_get_child_number to of_get_child_count
    > ---
    > 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 a75a831..ae242ef 100644
    > --- a/include/linux/of.h
    > +++ b/include/linux/of.h
    > @@ -195,6 +195,17 @@ 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)) != NULL)
    > + 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) \
    > @@ -268,6 +279,11 @@ 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 0;
    > +}
    > +
    > static inline int of_device_is_compatible(const struct device_node *device,
    > const char *name)
    > {



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