linux-kernel - Re: [PATCH v2 2/2] pwm: add this patch to support the new pwm of Rockchip SoCs

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Message-ID: <20140729113808.GC21732@ulmo.nvidia.com>
Date:	Tue, 29 Jul 2014 13:38:10 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	caesar <caesar.wang@...k-chips.com>
Cc:	Doug Anderson <dianders@...omium.org>, linux-pwm@...r.kernel.org,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] pwm: add this patch to support the new pwm of
 Rockchip SoCs

On Tue, Jul 29, 2014 at 07:09:07PM +0800, caesar wrote:
> Thierry,
> 
> 在 2014年07月29日 18:22, Thierry Reding 写道:
> >On Mon, Jul 28, 2014 at 07:19:18PM +0800, caesar wrote:
> >>Doug,
> >>在 2014年07月28日 12:01, Doug Anderson 写道:
> >>>Caesar,
> >>>
> >>>On Sun, Jul 27, 2014 at 7:00 AM, caesar <caesar.wang@...k-chips.com> wrote:
> >>>>/*I think will be show the faill log:->
> >>>>
> >>>>* rockchip-pwm ff9301a0.pwm: can't request region for resource [mem
> >>>>0xff9301a0-0xff93019f]
> >>>>*/
> >>>>
> >>>>pc->base = devm_ioremap_resource(dev, regs);
> >>>Did you actually code this up and try it and get this error?
> >>Yeah.
> >This should work if you properly set up the PWM subregion as a child of
> >the LCDC region, which is what MFD will do for you.
> >
> >Thierry
> As you say,should this change be occured by lcdc driver and dts?
> 
> The PWM driver don't need do any changes?

No, I don't think the PWM driver needs to be changed for the above to
work.

Thierry

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