linux-kernel - Re: [PATCH Resend] driver/core: cpu: initialize opp table

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Message-ID: <CAKohpo=F5gSPvVSAX=qePnudxiuKWLKGTZy8vd80=MJxESWJZQ@mail.gmail.com>
Date:	Wed, 21 May 2014 15:11:39 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Sudeep Holla <sudeep.holla@....com>
Cc:	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arvind Chauhan <Arvind.Chauhan@....com>,
	"inderpal.s@...sung.com" <inderpal.s@...sung.com>,
	"pavel@....cz" <pavel@....cz>, "nm@...com" <nm@...com>,
	"chander.kashyap@...aro.org" <chander.kashyap@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Shawn Guo <shawn.guo@...aro.org>
Subject: Re: [PATCH Resend] driver/core: cpu: initialize opp table

On 21 May 2014 15:05, Sudeep Holla <sudeep.holla@....com> wrote:
> As Rafael mentioned it's better to have a wrapper function to hide these
> details. You should consider the fact that of_init_opp_table returns -EINVAL
> if
> CONFIG_PM_OPP not defined as well as when the list is invalid in the DT.
> IMO we can return -ENOSYS if not implemented(i.e. !CONFIG_PM_OPP)

I didn't understood Rafael's comment as I couldn't figure out if he is just
pointing to CONFIG_** or some arch specific thing..

But it looks more obvious that he asked me something similar to what you
are saying :)

Why do we need to return anything? Let that function have return type 'void'?
Also would it make sense to move this into it as well?

cpu->dev.of_node = of_get_cpu_node(num, NULL);
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