From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Francesco Lavra <flavra@baylibre.com>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <skhan@linuxfoundation.org>,
linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org
Subject: Re: [PATCH v6 5/7] iio: ABI: Add support for floating-point numbers in buffer scan elements
Date: Wed, 25 Feb 2026 13:29:13 +0200 [thread overview]
Message-ID: <aZ7dCdLs5xcJ4UGW@smile.fi.intel.com> (raw)
In-Reply-To: <20260225101748.2368295-1-flavra@baylibre.com>
On Wed, Feb 25, 2026 at 11:17:47AM +0100, Francesco Lavra wrote:
> In the data storage description of a scan element, the first character
> after the colon can have the values 's' and 'u' to specify signed and
> unsigned integers, respectively.
> Add 'f' as an allowed value to specify floating-point numbers formatted
> according to the IEEE 754 standard.
Main Q here: How will behave iio-tools and other existing user space when
it sees this? Shouldn't you prepare the user space first for such a change?
...
> - Format is [be|le]:[s|u]bits/storagebits[Xrepeat][>>shift] .
> + Format is [be|le]:[s|u|f]bits/storagebits[Xrepeat][>>shift] .
I would probably keep order as [f|s|u] and...
> - * *s* or *u*, specifies if signed (2's complement) or unsigned.
> + * *s* or *u* or *f*, specifies if signed (2's complement) or unsigned or
> + floating-point.
* *f*, specifies if floating-point.
* *s* or *u*, specifies if signed (2's complement) or unsigned.
...
> - **be** or **le** specifies big or little-endian.
> -- **s** or **u** specifies if signed (2's complement) or unsigned.
> +- **s** or **u** or **f** specifies if signed (2's complement) or unsigned or
> + floating-point.
Ditto.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-02-25 11:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 10:04 [PATCH v6 0/7] imu: st_lsm6dsx: Add support for rotation sensor Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 1/7] iio: imu: st_lsm6dsx: Set FIFO ODR for accelerometer and gyroscope only Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 2/7] iio: imu: st_lsm6dsx: Set buffer sampling frequency for accelerometer only Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 3/7] iio: imu: st_lsm6dsx: Fix check for invalid samples from FIFO Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 4/7] iio: Rename 'sign' field to `format` in struct iio_scan_type Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 5/7] iio: ABI: Add support for floating-point numbers in buffer scan elements Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 6/7] iio: ABI: Add custom data type Francesco Lavra
2026-02-25 10:06 ` [PATCH v6 7/7] iio: imu: st_lsm6dsx: Add support for rotation sensor Francesco Lavra
2026-02-25 10:11 ` [PATCH v6 1/7] iio: imu: st_lsm6dsx: Set FIFO ODR for accelerometer and gyroscope only Francesco Lavra
2026-02-25 10:16 ` [PATCH v6 2/7] iio: imu: st_lsm6dsx: Set buffer sampling frequency for accelerometer only Francesco Lavra
2026-02-28 17:56 ` Jonathan Cameron
2026-02-25 10:17 ` [PATCH v6 3/7] iio: imu: st_lsm6dsx: Fix check for invalid samples from FIFO Francesco Lavra
2026-02-25 11:39 ` Andy Shevchenko
2026-02-26 9:43 ` Geert Uytterhoeven
2026-02-26 9:56 ` Andy Shevchenko
2026-02-28 16:38 ` Jonathan Cameron
2026-02-25 10:17 ` [PATCH v6 4/7] iio: Rename 'sign' field to `format` in struct iio_scan_type Francesco Lavra
2026-02-25 21:27 ` David Lechner
2026-02-28 17:59 ` Jonathan Cameron
2026-02-25 10:17 ` [PATCH v6 5/7] iio: ABI: Add support for floating-point numbers in buffer scan elements Francesco Lavra
2026-02-25 11:29 ` Andy Shevchenko [this message]
2026-02-25 21:27 ` David Lechner
2026-02-25 10:18 ` [PATCH v6 6/7] iio: ABI: Add custom data type Francesco Lavra
2026-02-25 11:43 ` Andy Shevchenko
2026-02-25 21:27 ` David Lechner
2026-02-26 9:21 ` Andy Shevchenko
2026-02-26 15:30 ` Francesco Lavra
2026-02-26 15:57 ` Andy Shevchenko
2026-02-28 17:52 ` Jonathan Cameron
2026-02-25 10:18 ` [PATCH v6 7/7] iio: imu: st_lsm6dsx: Add support for rotation sensor Francesco Lavra
2026-02-25 11:50 ` Andy Shevchenko
2026-02-25 21:41 ` David Lechner
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