linux-kernel - Re: [PATCH v7 1/2] iio: core: Introduce IIO_VAL_INT

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Message-ID: <20211030154759.63be7331@jic23-huawei>
Date:   Sat, 30 Oct 2021 15:47:59 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Andriy Tryshnivskyy <andriy.tryshnivskyy@...nsynergy.com>,
        linux-kernel@...r.kernel.org
Cc:     jbhayana@...gle.com, lars@...afoo.de, linux-iio@...r.kernel.org,
        Vasyl.Vavrychuk@...nsynergy.com, andy.shevchenko@...il.com
Subject: Re: [PATCH v7 1/2] iio: core: Introduce IIO_VAL_INT_64.

On Sun, 24 Oct 2021 19:58:52 +0300
Andriy Tryshnivskyy <andriy.tryshnivskyy@...nsynergy.com> wrote:

> On 24.10.21 19:10, Jonathan Cameron wrote:
> 
> > CAUTION: This email originated from outside of the organization.
> > Do not click links or open attachments unless you recognize the sender and know the content is safe.

Ah. One thing I forgot.  Value formatting is the only bit of IIO where
we have self tests.

Would you mind writing some test cases in
drivers/iio/tests/iio-test-format.c ?

I'll pick this up in the meantime but definitely want to make
sure we don't forget the tests!

Jonathan


> >
> >
> > On Sun, 24 Oct 2021 12:16:26 +0300
> > Andriy Tryshnivskyy <andriy.tryshnivskyy@...nsynergy.com> wrote:
> >  
> >> Introduce IIO_VAL_INT_64 to read 64-bit value for
> >> channel attribute. Val is used as lower 32 bits.
> >>
> >> Signed-off-by: Andriy Tryshnivskyy <andriy.tryshnivskyy@...nsynergy.com>
> >> ---
> >>   drivers/iio/industrialio-core.c | 3 +++
> >>   include/linux/iio/types.h       | 1 +
> >>   2 files changed, 4 insertions(+)
> >>
> >> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> >> index 6d2175eb7af2..49e42d04ea16 100644
> >> --- a/drivers/iio/industrialio-core.c
> >> +++ b/drivers/iio/industrialio-core.c
> >> @@ -702,6 +702,9 @@ static ssize_t __iio_format_value(char *buf, size_t offset, unsigned int type,
> >>        }
> >>        case IIO_VAL_CHAR:
> >>                return sysfs_emit_at(buf, offset, "%c", (char)vals[0]);
> >> +     case IIO_VAL_INT_64:
> >> +             tmp2 = (s64)((((u64)vals[1]) << 32) | (u32)vals[0]);
> >> +             return sysfs_emit_at(buf, offset, "%lld", tmp2);
> >>        default:
> >>                return 0;
> >>        }
> >> diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
> >> index 84b3f8175cc6..bb6578a5ee28 100644
> >> --- a/include/linux/iio/types.h
> >> +++ b/include/linux/iio/types.h
> >> @@ -24,6 +24,7 @@ enum iio_event_info {
> >>   #define IIO_VAL_INT_PLUS_NANO 3
> >>   #define IIO_VAL_INT_PLUS_MICRO_DB 4
> >>   #define IIO_VAL_INT_MULTIPLE 5
> >> +#define IIO_VAL_INT_64 6 /* 64-bit data, val is lower 32 bits) */  
> > I'm guessing the closing bracket is left over of some editing?
> >
> > Otherwise fine and I can tidy that up whilst applying.  
> 
> Yes, it's a typo. Please remove it while applying. Thanks!
> 
> > Note that this is almost certainly too late for this cycle (we are
> > about a week away from merge window subject to whatever Linus says
> > for rc7 and new stuff needs some time to soak in next), but I'll
> > plan to get it queued up early in the next one.
> >  
> Noted. Thanks a lot!
> 
> >>   #define IIO_VAL_FRACTIONAL 10
> >>   #define IIO_VAL_FRACTIONAL_LOG2 11
> >>   #define IIO_VAL_CHAR 12  
> 
> Best regards,
> Andriy.
> 
>