linux-kernel - Re: [PATCH v4 2/2] pwm: rockchip: Added to support for RK3288 SoC

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Date:	Thu, 07 Aug 2014 09:27:33 +0800
From:	caesar <caesar.wang@...k-chips.com>
To:	Doug Anderson <dianders@...omium.org>
CC:	Thierry Reding <thierry.reding@...il.com>,
	Heiko Stübner <heiko@...ech.de>,
	b.galvani@...il.com, Rob Herring <robh+dt@...nel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Randy Dunlap <rdunlap@...radead.org>,
	Kumar Gala <galak@...eaurora.org>,
	Eddie Cai <cf@...k-chips.com>,
	Tao Huang <huangtao@...k-chips.com>,
	Jianqun Xu <xjq@...k-chips.com>,
	Addy Ke <addy.ke@...k-chips.com>,
	陈渐飞 <cjf@...k-chips.com>,
	han jiang <hj@...k-chips.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-pwm <linux-pwm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v4 2/2] pwm: rockchip: Added to support for RK3288 SoC

Doug,

在 2014年08月07日 06:46, Doug Anderson 写道:
> Caesar,
>
> On Thu, Jul 24, 2014 at 3:21 AM, Caesar Wang <caesar.wang@...k-chips.com> wrote:
>> +static const struct rockchip_pwm_data pwm_data_v1 = {
>> +       .regs.duty = PWM_HRC,
>> +       .regs.period = PWM_LRC,
>> +       .regs.cntr = PWM_CNTR,
>> +       .regs.ctrl = PWM_CTRL,
>> +       .prescaler = PRESCALER,
>> +       .set_enable = rockchip_pwm_set_enable_v1,
>> +};
>> +
>> +static const struct rockchip_pwm_data pwm_data_v2 = {
>> +       .regs.duty = PWM_LRC,
>> +       .regs.period = PWM_HRC,
>> +       .regs.cntr = PWM_CNTR,
>> +       .regs.ctrl = PWM_CTRL,
>> +       .prescaler = PRESCALER-1,
>> +       .set_enable = rockchip_pwm_set_enable_v2,
>> +};
>> +
>> +static const struct rockchip_pwm_data pwm_data_vop = {
>> +       .regs.duty = PWM_LRC,
>> +       .regs.period = PWM_HRC,
>> +       .regs.cntr = PWM_CTRL,
>> +       .regs.ctrl = PWM_CNTR,
> Did you really mean to flip CTRL and CNTR here?  If so, that's super
> confusing and deserves a comment.  AKA, I think the above should not
> be:
>
>   +       .regs.cntr = PWM_CTRL,
>   +       .regs.ctrl = PWM_CNTR,
>
> ...but should be
>
>   +       .regs.cntr = PWM_CNTR,
>   +       .regs.ctrl = PWM_CTRL,
>
> If you didn't mean to flip CTRL and CNTR here, then just get rid of
> pwm_data_vop and refer to pwm_data_v2.  In fact, I'd suggest that you
> totally remove the "rockchip,vop-pwm" since there's nothing different
> between "rockchip,rk3288-pwm" and "rockchip,vop-pwm".

Sorry,I think it's no problem. the  "rockchip,rk3288-pwm" and 
"rockchip,vop-pwm" are seperate PWM controllers.
They are just different registers address between CNTR and CTRL .

>
> Have you validated Thierry's suggestion to allow you to access your
> memory range?
Yes,we have solve it in lcdc driver.
The Mark Yao have the  submission in [0].

[0]: https://lkml.org/lkml/2014/8/4/20
>
> -Doug
>
>
>


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