linux-kernel - Re: [PATCH 1/2] power:lp8727_charger: use the private data instead of updating I2C device platform data

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Message-ID: <20150922131448.GC23334@earth>
Date:	Tue, 22 Sep 2015 15:14:49 +0200
From:	Sebastian Reichel <sre@...nel.org>
To:	Milo Kim <milo.kim@...com>
Cc:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] power:lp8727_charger: use the private data instead
 of updating I2C device platform data

Hi,

On Tue, Aug 25, 2015 at 03:07:07PM +0900, Milo Kim wrote:
> Currently, lp8727 charger driver parses the DT and copies values into the
> 'cl->dev.platform_data' if 'of_node' exists.
> This may have architectural issue. Platform data is configurable through
> the DT or I2C board info inside the platform area.
> However, lp8727 driver changes this configuration when it is loaded.
> 
> The driver should get data from the platform side and use the private
> data, 'lp8727_chg->pdata' instead of changing the original platform data.
> 
> _probe() procedure is changed as follows.
>   1. lp8727_parse_dt() returns the pointer of lp8727_platform_data.
>      The driver uses this allocated platform data. So it should keep
>      original platform data, 'dev->platform_data'.
>   2. In _probe(), check the return value of lp8727_parse_dt().
>      If an error is found, then exit as PTR_ERR(pdata).
>   3. If 'of_node' is not found, then the driver just gets the platform data
>      from the I2C device structure.
>   4. Map the platform data to private data structure.

Thanks, I queued both patches.

-- Sebastian

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