linux-kernel - [PATCH v3 0/2] iio: humditiy: hdc3020: fix units

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Message-Id: <20251013-hdc3020-units-fix-v3-0-b21fab32b882@liebherr.com>
Date: Mon, 13 Oct 2025 10:12:24 +0200
From: Dimitri Fedrau via B4 Relay <devnull+dimitri.fedrau.liebherr.com@...nel.org>
To: Javier Carrasco <javier.carrasco.cruz@...il.com>, 
 Li peiyu <579lpy@...il.com>, Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>, Dimitri Fedrau <dima.fedrau@...il.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Dimitri Fedrau <dimitri.fedrau@...bherr.com>, 
 Chris Lesiak <chris.lesiak@...orbio.com>
Subject: [PATCH v3 0/2] iio: humditiy: hdc3020: fix units

Fix units to milli degree celsius and milli percent for temperature
respectively relative humidity measurements and thresholds.

Signed-off-by: Dimitri Fedrau <dimitri.fedrau@...bherr.com>
---
Changes in v3:
- Fix verbose comment for define HDC3020_THRESH_FRACTION (Javier)
- Embed prescale into define HDC3020_THRESH_FRACTION to make the division
  by 5 calculation in threshold calculations explicit. (Andy)
- Add resulting units into comments again in hdc3020_thresh_get_temp and
  hdc3020_thresh_get_hum (Andy)
- Link to v2: https://lore.kernel.org/r/20250901-hdc3020-units-fix-v2-0-082038a15917@liebherr.com

Changes in v2:
- Added explanation what is wrong at the moment into commit msg
- Added define HDC3020_THRESH_FRACTION and comment at the beginning of the
  code.
- Use MILLI for instead of hardcoded 1000.
- Link to v1: https://lore.kernel.org/r/20250821-hdc3020-units-fix-v1-0-6ab0bc353c5e@liebherr.com

---
Dimitri Fedrau (2):
      iio: humditiy: hdc3020: fix units for temperature and humidity measurement
      iio: humditiy: hdc3020: fix units for thresholds and hysteresis

 drivers/iio/humidity/hdc3020.c | 71 ++++++++++++++++++++++++------------------
 1 file changed, 41 insertions(+), 30 deletions(-)
---
base-commit: 875e7d357a7f2e77a7f3fc4759d0aa0872c33027
change-id: 20250820-hdc3020-units-fix-91edbb8ccd07

Best regards,
-- 
Dimitri Fedrau <dimitri.fedrau@...bherr.com>