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

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Message-ID: <20230501164843.18d9ec6f@jic23-huawei>
Date:   Mon, 1 May 2023 16:48:43 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
Cc:     Matti Vaittinen <mazziesaccount@...il.com>,
        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 Mon, 24 Apr 2023 05:09:36 +0000
"Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com> wrote:

> 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.
No need as not much changed around these (not I'm not at rc1 yet, but
char-misc-linus now includes these so I rebased on that)

Applied to the fixes-togreg branch of iio.git with fixes tags added now
the commits are upstream.

Thanks,

Jonathan

> 
> --Matti
>