linux-kernel - Re: [PATCH v9 2/2] Add PWM fan controller driver for LGM SoC

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Date:   Sat, 22 Aug 2020 13:21:28 +0800
From:   "Tanwar, Rahul" <rahul.tanwar@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     u.kleine-koenig@...gutronix.de, linux-pwm@...r.kernel.org,
        lee.jones@...aro.org, thierry.reding@...il.com,
        p.zabel@...gutronix.de, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        songjun.Wu@...el.com, cheol.yong.kim@...el.com,
        qi-ming.wu@...el.com, rahul.tanwar.linux@...il.com,
        rtanwar@...linear.com
Subject: Re: [PATCH v9 2/2] Add PWM fan controller driver for LGM SoC


Hi Andy,

On 21/8/2020 6:56 pm, Andy Shevchenko wrote:
> On Fri, Aug 21, 2020 at 05:32:11PM +0800, Rahul Tanwar wrote:
>> Intel Lightning Mountain(LGM) SoC contains a PWM fan controller.
>> This PWM controller does not have any other consumer, it is a
>> dedicated PWM controller for fan attached to the system. Add
>> driver for this PWM fan controller.
> ...
>
>> +#include <linux/bitfield.h>
>> +#include <linux/clk.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
> We haven't settle this yet...

I investigated more about it. I was getting build error because we were
relying on of_device.h for including platform_device.h. You are right that
we are not using anything from of_device.h. So i removed of_device.h from
driver and added include <linux/platform_device.h> & build is ok.

Regarding mod_devicetable.h header, it gets included indirectly from
<linux/pwm.h> which includes of.h which includes mod_devicetable.h. So i
think no point including it again in the driver.

Regards,
Rahul

>> +#include <linux/pwm.h>
>> +#include <linux/regmap.h>
>> +#include <linux/reset.h>