linux-kernel - Re: [PATCH] iio/gyro/bmg160: Use millidegrees for temperature scale

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Date:   Wed, 13 Feb 2019 06:58:49 +0000
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     Tomasz Duszynski <tduszyns@...il.com>
CC:     "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jic23@...nel.org" <jic23@...nel.org>,
        "knaack.h@....de" <knaack.h@....de>,
        "lars@...afoo.de" <lars@...afoo.de>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>
Subject: Re: [PATCH] iio/gyro/bmg160: Use millidegrees for temperature scale

On 12-02-19 18:00, Tomasz Duszynski wrote:
> On Tue, Feb 12, 2019 at 03:25:49PM +0100, Mike Looijmans wrote:
>> Standard unit for temperature is millidegrees Celcius, whereas this driver
>> was reporting in degrees. Fix the scale factor in the driver.
>>
>> Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
>> ---
>>   drivers/iio/gyro/bmg160_core.c | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c
>> index 63ca316..ad7f8cb 100644
>> --- a/drivers/iio/gyro/bmg160_core.c
>> +++ b/drivers/iio/gyro/bmg160_core.c
>> @@ -585,8 +585,9 @@ static int bmg160_read_raw(struct iio_dev *indio_dev,
>>   		*val = 0;
>>   		switch (chan->type) {
>>   		case IIO_TEMP:
>> -			*val2 = 500000;
>> -			return IIO_VAL_INT_PLUS_MICRO;
>> +			*val = 500;
>> +			*val2 = 0;
>> +			return IIO_VAL_INT;
> 
> You are returning integer type to iio so there's no point in touching
> val2. iio will ignore it anyway.

Indeed, I'll post a v2 for that.

> 
>>   		case IIO_ANGL_VEL:
>>   		{
>>   			int i;
>> --
>> 1.9.1
>>