linux-kernel - Re: [PATCH 5/8] power: bq27x00_battery: Renaming for consistency

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Message-ID: <CAAfyv342rHGazCqZ19oYfwR5E2NO65VhhstXBHdDVfjd7USbFQ@mail.gmail.com>
Date:	Thu, 23 Jul 2015 22:56:26 +0200
From:	Belisko Marek <marek.belisko@...il.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	"Andrew F. Davis" <afd@...com>, Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Dan Murphy <dmurphy@...com>,
	Linux PM mailing list <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/8] power: bq27x00_battery: Renaming for consistency

Hi Pali,

On Thu, Jul 23, 2015 at 10:15 PM, Pali Rohár <pali.rohar@...il.com> wrote:
> On Thursday 23 July 2015 19:03:08 Andrew F. Davis wrote:
>> >> -#ifdef CONFIG_BATTERY_BQ27X00_I2C
>> >> -MODULE_ALIAS("i2c:bq27000-battery");
>> >> +#ifdef CONFIG_BATTERY_BQ27XXX_I2C
>> >> +MODULE_ALIAS("i2c:bq27xxx-battery");
>> >>
>> >>  #endif
>> >
>> > Why is this MODULE_ALIAS needed? Some lines upper there is
>> >
>> >  MODULE_DEVICE_TABLE(i2c, bq27xxx_id);
>> >
>> > which add proper i2c: module alias...
>>
>> Not sure, looks like it was added in commit
>> 8ebb7e9c1a502cfc300618c19c3c6f06fc76d237 which claims that the
>> "module won't get loaded automatically" without it, but I have not
>> had this problem, so I'm not sure why it's there.
>>
>
> git grep bq27000-battery show me that only one driver uses that name:
> drivers/w1/slaves/w1_bq27000.c
>
> And more over, it is platform device, not i2c device. So that commit
> 8ebb7e9c1a502cfc300618c19c3c6f06fc76d237 is wrong! CCing Marek.
If you look to power/bq27x00 driver then there is I2C part and
platform part only
both selectable by config. In 8ebb7e9c1a502cfc300618c19c3c6f06fc76d237 was added
MODULE_ALIAS to have this driver working as module for both buses.
Even if I2C isn't used anywhere
I add MODULE_ALIAS also for that.
>
> MODULE_ALIAS("platform:bq27000-battery") is really needed for
> w1_bq27000.c but MODULE_ALIAS("i2c:bq27000-battery") should be removed.
> It is not used by any board platform code or DT.
Not sure if it's good idea to remove it. Somebody outside can use it.
>
> Marek, correct me if I'm wrong.
>
> --
> Pali Rohár
> pali.rohar@...il.com

BR,

marek



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