linux-kernel - RE: [PATCH v2 08/10] pwm: pwm-tiehrpwm: Adding TBCLK gating support.

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Date:	Fri, 9 Nov 2012 10:59:30 +0000
From:	"Philip, Avinash" <avinashphilip@...com>
To:	Thierry Reding <thierry.reding@...onic-design.de>
CC:	"paul@...an.com" <paul@...an.com>,
	"tony@...mide.com" <tony@...mide.com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"Cousson, Benoit" <b-cousson@...com>,
	"Hiremath, Vaibhav" <hvaibhav@...com>,
	"AnilKumar, Chimata" <anilkumar@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Nori, Sekhar" <nsekhar@...com>,
	"Hebbar, Gururaja" <gururaja.hebbar@...com>,
	"Bedia, Vaibhav" <vaibhav.bedia@...com>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>
Subject: RE: [PATCH v2 08/10] pwm: pwm-tiehrpwm: Adding TBCLK gating support.

On Fri, Nov 09, 2012 at 13:41:04, Thierry Reding wrote:
> On Thu, Nov 08, 2012 at 01:23:15PM +0530, Philip, Avinash wrote:
...
> > +	/* Some platforms require explicit tbclk gating */
> > +	if (of_property_read_bool(pdev->dev.of_node, "tbclkgating")) {
> 
> Is it really necessary to have an extra boolean property for this?
> Couldn't this just be handled by not defining a clock for the tbclk
> consumer in board setup/DT

If no clk node defined, driver can still continue expecting this platform 
the requirement is not there. So I will check for tbclk with devm_clk_get()
and continue by removing Boolean property.

> 
> > +		pc->tbclk = clk_get(&pdev->dev, "tbclk");
> 
> You should be using devm_clk_get() or add a matching clk_put() in
> .remove().

Ok

Thanks
Avinash

> 
> Thierry
> 

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