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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <53D7ACFB.6050800@rock-chips.com>
Date:	Tue, 29 Jul 2014 22:17:31 +0800
From:	caesar <caesar.wang@...k-chips.com>
To:	Thierry Reding <thierry.reding@...il.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

Thierry,

在 2014年07月29日 19:38, Thierry Reding 写道:
> 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
Ok, as you suggestions, The PWM driver :

static int rockchip_pwm_probe (...)
{

	...

         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       pc->base = devm_ioremap_resource(&pdev->dev, r);
+       if (!strcmp(of_id->compatible, "rockchip,vop-pwm"))
+               pc->base = devm_ioremap(&pdev->dev, r->start,
resource_size(r));
+       else
+               pc->base = devm_ioremap_resource(&pdev->dev, r);

	...

}

This will be fixed for following:

static int rockchip_pwm_probe (...)
{

	...

         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	pc->base = devm_ioremap_resource(&pdev->dev, r);

	...

}

I will discuss with lcdc of upstream's people tomorrow.

I has sent the PWM in patch v4 the last few days,Hope you can help check 
and accept it,thanks.:-)

-caesar

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/