linux-kernel - Re: [PATCH -next] iio:ad7797: Use correct attribute

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Message-ID: <527d339d-fe32-1121-b83b-4b9385541c37@huawei.com>
Date:   Mon, 9 Mar 2020 09:38:19 +0800
From:   Yuehaibing <yuehaibing@...wei.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>
CC:     "stefan.popa@...log.com" <stefan.popa@...log.com>,
        "Jonathan.Cameron@...wei.com" <Jonathan.Cameron@...wei.com>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>,
        "knaack.h@....de" <knaack.h@....de>,
        "Hennerich, Michael" <Michael.Hennerich@...log.com>,
        "lars@...afoo.de" <lars@...afoo.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>
Subject: Re: [PATCH -next] iio:ad7797: Use correct attribute_group

On 2020/3/7 21:10, Jonathan Cameron wrote:
> On Wed, 4 Mar 2020 06:35:28 +0000
> "Ardelean, Alexandru" <alexandru.Ardelean@...log.com> wrote:
> 
>> On Mon, 2020-03-02 at 21:32 +0800, YueHaibing wrote:
>>> [External]
>>>
>>> It seems ad7797_attribute_group should be used in ad7797_info,
>>> according to commit ("iio:ad7793: Add support for the ad7796 and ad7797").  
>>
>> While the change looks good at first, I am thinking that this might introduce
>> another issue while fixing this one.
>>
>> It looks like the ad7797_attributes[] array may also require the
>> &iio_dev_attr_in_m_in_scale_available.dev_attr.attr attribute as well.
>> It looks like the available scales should be printed for AD7997 as well.
>>
>> That being said, this patch is fine as-is.
>> But it would require a patch [before-this-patch] to fix the ad7797_attributes
>> array.
>>
>> Something like this:
>>
>> static struct attribute *ad7797_attributes[] = {
>>         &iio_const_attr_sampling_frequency_available_ad7797.dev_attr.attr,
>> +       &iio_dev_attr_in_m_in_scale_available.dev_attr.attr,
>>        NULL
>> };
>>
>> I'm hoping I'm right about this one. I sometimes don't notice things too well.
> 
> Agreed. Should have that addition as well.  If not we'll successfully fix
> one issue but drop a valid interface at the same time...
> 

Ok, will send v2 with this addtion, thanks!

> Thanks,
> 
> Jonathan
> 
>>
>>>
>>> Fixes: fd1a8b912841 ("iio:ad7793: Add support for the ad7796 and ad7797")
>>> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
>>> ---
>>>  drivers/iio/adc/ad7793.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
>>> index b747db9..e5691e3 100644
>>> --- a/drivers/iio/adc/ad7793.c
>>> +++ b/drivers/iio/adc/ad7793.c
>>> @@ -542,7 +542,7 @@ static const struct iio_info ad7797_info = {
>>>  	.read_raw = &ad7793_read_raw,
>>>  	.write_raw = &ad7793_write_raw,
>>>  	.write_raw_get_fmt = &ad7793_write_raw_get_fmt,
>>> -	.attrs = &ad7793_attribute_group,
>>> +	.attrs = &ad7797_attribute_group,
>>>  	.validate_trigger = ad_sd_validate_trigger,
>>>  };
>>>    
> 
> 
> .
>