linux-kernel - Re: [PATCH v3 07/16] of/device: add helper to get cpu device node from logical cpu index

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Message-ID: <CAL_JsqK5i8fxskOtdqmPYL1pPicesAYHfW6+2NLR41t_fkf+6A@mail.gmail.com>
Date:	Fri, 26 Jul 2013 13:55:34 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>
Cc:	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Olof Johansson <olof@...om.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 07/16] of/device: add helper to get cpu device node
 from logical cpu index

On Fri, Jul 26, 2013 at 12:01 PM, Sudeep KarkadaNagesha
<Sudeep.KarkadaNagesha@....com> wrote:
> Rob,
>
> On 22/07/13 12:32, Sudeep KarkadaNagesha wrote:
>> From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>
>>
>> Multiple drivers need to get the cpu device node from the cpu logical
>> index and then access the of_node.
>>
>> This patch adds helper function to fetch the device node directly.
>>
>> Cc: Rob Herring <rob.herring@...xeda.com>
>> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>
>
> If you have no objections with this patch, can I add your ACK ?

Yes.

Acked-by: Rob Herring <rob.herring@...xeda.com>

>
> Regards,
> Sudeep
>
>> ---
>>  include/linux/of_device.h | 15 +++++++++++++++
>>  1 file changed, 15 insertions(+)
>>
>> diff --git a/include/linux/of_device.h b/include/linux/of_device.h
>> index 9d27475..82ce324 100644
>> --- a/include/linux/of_device.h
>> +++ b/include/linux/of_device.h
>> @@ -1,6 +1,7 @@
>>  #ifndef _LINUX_OF_DEVICE_H
>>  #define _LINUX_OF_DEVICE_H
>>
>> +#include <linux/cpu.h>
>>  #include <linux/platform_device.h>
>>  #include <linux/of_platform.h> /* temporary until merge */
>>
>> @@ -43,6 +44,15 @@ static inline void of_device_node_put(struct device *dev)
>>       of_node_put(dev->of_node);
>>  }
>>
>> +static inline struct device_node *of_cpu_device_node_get(int cpu)
>> +{
>> +     struct device *cpu_dev;
>> +     cpu_dev = get_cpu_device(cpu);
>> +     if (!cpu_dev)
>> +             return NULL;
>> +     return of_node_get(cpu_dev->of_node);
>> +}
>> +
>>  #else /* CONFIG_OF */
>>
>>  static inline int of_driver_match_device(struct device *dev,
>> @@ -67,6 +77,11 @@ static inline const struct of_device_id *of_match_device(
>>  {
>>       return NULL;
>>  }
>> +
>> +static inline struct device_node *of_cpu_device_node_get(int cpu)
>> +{
>> +     return NULL;
>> +}
>>  #endif /* CONFIG_OF */
>>
>>  #endif /* _LINUX_OF_DEVICE_H */
>>
>
>
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>
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