linux-kernel - Re: [PATCH V3 1/1] dt: add of_get_child

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Message-ID: <CAA+hA=RpfLfUyupVqBpMHsRN1h5KG5eLD86DkDygZRk5nCUtqA@mail.gmail.com>
Date:	Sat, 14 Apr 2012 02:07:59 +0800
From:	Dong Aisheng <dongas86@...il.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	Dong Aisheng <dong.aisheng@...aro.org>,
	devicetree-discuss@...ts.ozlabs.org, grant.likely@...retlab.ca,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V3 1/1] dt: add of_get_child_count helper function

Hi Rob,

On Mon, Feb 13, 2012 at 4:22 AM, Rob Herring <robherring2@...il.com> wrote:
> 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@...aro.org>
>> Cc: Grant Likely <grant.likely@...retlab.ca>
>> Cc: Rob Herring <rob.herring@...xeda.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.
>
I did not see this in 3.4 kernel.
Anything i missed?
My pinctrl-imx driver i just sent is using this.

Regards
Dong Aisheng

> 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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