linux-kernel - Re: [RFC PATCH 2/2] iio: light: Add support for LTR559 chip

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Date:	Thu, 09 Apr 2015 15:28:15 -0700
From:	sathyanarayanan kuppuswamy 
	<sathyanarayanan.kuppuswamy@...ux.intel.com>
To:	Daniel Baluta <daniel.baluta@...el.com>,
	Jonathan Cameron <jic23@...nel.org>
CC:	knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Kuppuswamy, Sathyanarayanan" <sathyanarayanan.kuppuswamy@...el.com>
Subject: Re: [RFC PATCH 2/2] iio: light: Add support for LTR559 chip



On 04/09/2015 06:44 AM, Daniel Baluta wrote:
>
>
> On 04/09/2015 04:39 PM, Jonathan Cameron wrote:
>> On 31/03/15 11:37, Daniel Baluta wrote:
>>> This device is register compatible with LTR501, with a minor 
>>> difference for
>>> ALS control register as showed below:
>>>
>>> ALS Control register for LTR501:
>>>
>>>      7      6      5      4      3      2      1      0
>>> +------+------+------+------+------+------+------+------+
>>> |                           |      |      |             |
>>> |        Reserved           | Gain |  SW  |    ALS Mode |
>>> |                           |      | Reset|             |
>>> +------+------+------+------+------+------+------+------+
>>>
>>> ALS Control register for LTR559:
>>>
>>>      7      6      5      4      3      2      1      0
>>> +------+------+------+------+------+------+------+------+
>>> |                    |                    |      |      |
>>> |     Reserved       |        Gain        |  SW  | ALS  |
>>> |                    |                    | Reset| Mode |
>>> +------+------+------+------+------+------+------+------+
>>>
>>> We handle this difference by introducing ltr501_chip_info.
>>>
>>> Datasheet for LTR559 is at:
>>> http://optoelectronics.liteon.com/upload/download/DS86-2013-0003/S_110_LTR-559ALS-01_DS_V1.pdf 
>>>
>>>
>>> Signed-off-by: Daniel Baluta <daniel.baluta@...el.com>
>> Looks good to me.  Let us know when you've tested it ;)
>> Anyhow, one comment inline.  It 'think' you can end up with a device 
>> probing
>> succesfully with no known name...
>
> Good point.
>
> thanks,
> Daniel.
>
> <snip>
>
>>> -    indio_dev->name = LTR501_DRV_NAME;
>>> +    indio_dev->name = name;
>> Can name still be NULL?  Needs a default value that makes sense.
>>>       indio_dev->modes = INDIO_DIRECT_MODE;
>
> I will fix this and sync with Sathya for the LTR301 support.

I will send you the re-based LTR301 patch. Please add it your patch set.
>
> thanks,
> Daniel.
> -- 
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>

-- 
Sathyanarayanan Kuppuswamy
Android kernel developer

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