linux-kernel - Re: [PATCH 2/2] iio: gts-helpers: fix integration time units

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Message-ID: <ec06f796-24f7-c3a4-c22e-f568bcc08522@fi.rohmeurope.com>
Date:   Mon, 24 Apr 2023 05:09:36 +0000
From:   "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Matti Vaittinen <mazziesaccount@...il.com>
CC:     Lars-Peter Clausen <lars@...afoo.de>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] iio: gts-helpers: fix integration time units

On 4/23/23 14:18, Jonathan Cameron wrote:
> On Mon, 17 Apr 2023 12:20:18 +0300
> Matti Vaittinen <mazziesaccount@...il.com> wrote:
> 
>> The IIO ABI mandates expressing integration times in seconds. The GTS
>> helper errorneously uses micro seconds in integration_times_available.
>> Fix this by converting the lists to IIO_VAL_INT_PLUS_MICRO.
>>
>> Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
>> ---
>>   drivers/iio/industrialio-gts-helper.c | 43 ++++++++++++++++++++-------
>>   1 file changed, 33 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/iio/industrialio-gts-helper.c b/drivers/iio/industrialio-gts-helper.c
>> index 8bb68975b259..2ab8d2dce019 100644
>> --- a/drivers/iio/industrialio-gts-helper.c
>> +++ b/drivers/iio/industrialio-gts-helper.c
>> @@ -337,6 +337,17 @@ static int iio_gts_build_avail_scale_table(struct iio_gts *gts)
>>   	return ret;
>>   }
>>   
>> +static void iio_gts_us_to_int_micro(int *time_us, int *int_micro_times,
>> +				    int num_times)
>> +{
>> +	int i;
>> +
>> +	for (i = 0; i < num_times; i++) {
>> +		int_micro_times[i * 2] = time_us[i] / 1000000;
>> +		int_micro_times[i * 2 + 1] = time_us[i] % 1000000;
>> +	}
>> +}
>> +
>>   /**
>>    * iio_gts_build_avail_time_table - build table of available integration times
>>    * @gts:	Gain time scale descriptor
>> @@ -351,7 +362,7 @@ static int iio_gts_build_avail_scale_table(struct iio_gts *gts)
>>    */
>>   static int iio_gts_build_avail_time_table(struct iio_gts *gts)
>>   {
>> -	int *times, i, j, idx = 0;
>> +	int *times, i, j, idx = 0, *int_micro_times;
>>   
>>   	if (!gts->num_itime)
>>   		return 0;
>> @@ -360,6 +371,7 @@ static int iio_gts_build_avail_time_table(struct iio_gts *gts)
>>   	if (!times)
>>   		return -ENOMEM;
>>   
>> +
> 
> Grumble.

Oh. I wonder how things like this tend to slip-in. Maybe I should change 
my password, it must be someone else has cracked my it and is typing 
these in at night while I am sleeping ^_^;

> If nothing else comes up I'll tidy that stray line up when applying.

Thanks!

> Note that these will need to wait for after rc1 now so my fixes branch
> has moved on to include the code being fixed.

Well, that's Ok. Please, let me know if you want me to rebase to rc1 and 
respin the series.

--Matti

-- 
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

~~ When things go utterly wrong vim users can always type :help! ~~