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

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Date:	Fri, 26 Jul 2013 18:01:37 +0100
From:	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>
To:	"rob.herring@...xeda.com" <rob.herring@...xeda.com>
CC:	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Shawn Guo <shawn.guo@...aro.org>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v3 07/16] of/device: add helper to get cpu device node
 from logical cpu index

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 ?

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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