linux-kernel - Re: [PATCH] hwmon: tmp102: Add device tree support

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Message-ID: <CAKdam54Zshr-d502E_AS+vw5+vLQnTBrAGRPTy-9-hZy1QEFbA@mail.gmail.com>
Date:	Mon, 6 Aug 2012 13:05:34 +0530
From:	"Poddar, Sourav" <sourav.poddar@...com>
To:	Benoit Cousson <b-cousson@...com>
Cc:	khali@...ux-fr.org, linux@...ck-us.net, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Felipe Balbi <balbi@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>
Subject: Re: [PATCH] hwmon: tmp102: Add device tree support

Hi Benoit,

On Fri, Aug 3, 2012 at 8:26 PM, Benoit Cousson <b-cousson@...com> wrote:
> Hi Sourav,
>
> On 08/03/2012 02:35 PM, Sourav Poddar wrote:
>> update tmp102 temperature sensor to also use device tree.
>>
>> Cc: Benoit Cousson <b-cousson@...com>
>> Cc: Felipe Balbi <balbi@...com>
>> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
>> Acked-by: Felipe Balbi <balbi@...com>
>> Signed-off-by: Sourav Poddar <sourav.poddar@...com>
>> ---
>>  drivers/hwmon/tmp102.c |   14 +++++++++++++-
>>  1 files changed, 13 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c
>> index 0d466b9..a8a9060 100644
>> --- a/drivers/hwmon/tmp102.c
>> +++ b/drivers/hwmon/tmp102.c
>> @@ -26,6 +26,7 @@
>>  #include <linux/err.h>
>>  #include <linux/mutex.h>
>>  #include <linux/device.h>
>> +#include <linux/of.h>
>>
>>  #define      DRIVER_NAME "tmp102"
>>
>> @@ -284,8 +285,19 @@ static const struct i2c_device_id tmp102_id[] = {
>>  };
>>  MODULE_DEVICE_TABLE(i2c, tmp102_id);
>>
>> +#ifdef CONFIG_OF
>> +static const struct of_device_id temperature_dt_match[] = {
>> +     { .compatible = "ti,tmp102" },
>
> Are you sure this is needed for this device?
>
> There is an automatic binding done for I2C devices in the of_i2c core
> code. So in theory, DT will be able to bind to any I2C device using the
> already existing table: MODULE_DEVICE_TABLE(i2c, tmp102_id).
>
> So I think this patch should not be needed.
>
Indeed. Checked it just now, this patch is not required and the already
existing table is enough for the device to work fine.

Thanks for the information.

This patch is abandoned.
~Sourav
> Regards,
> Benoit
>
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