linux-kernel - [PATCH v2 1/2] iio: accel: fxls8962af: Fix temperature calculation

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Message-Id: <20250502-fxls-v2-1-e1af65f1aa6c@geanix.com>
Date: Fri, 02 May 2025 08:15:06 +0200
From: Sean Nyekjaer <sean@...nix.com>
To: Jonathan Cameron <jic23@...nel.org>, 
 Marcelo Schmitt <marcelo.schmitt1@...il.com>, 
 Lars-Peter Clausen <lars@...afoo.de>, 
 Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Sean Nyekjaer <sean@...nix.com>, stable@...r.kernel.org
Subject: [PATCH v2 1/2] iio: accel: fxls8962af: Fix temperature calculation

According to spec temperature should be returned in milli degrees Celsius.
Add in_temp_scale to calculate from Celsius to milli Celsius.

Fixes: a3e0b51884ee ("iio: accel: add support for FXLS8962AF/FXLS8964AF accelerometers")
Cc: stable@...r.kernel.org
Signed-off-by: Sean Nyekjaer <sean@...nix.com>
---
 drivers/iio/accel/fxls8962af-core.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/accel/fxls8962af-core.c b/drivers/iio/accel/fxls8962af-core.c
index bf1d3923a181798a1c884ee08b62d86ab5aed26f..f515222e008493687921879a0b0ef44fd4ae5d10 100644
--- a/drivers/iio/accel/fxls8962af-core.c
+++ b/drivers/iio/accel/fxls8962af-core.c
@@ -134,6 +134,8 @@
 
 /* Raw temp channel offset */
 #define FXLS8962AF_TEMP_CENTER_VAL		25
+/* Raw temp channel scale */
+#define FXLS8962AF_TEMP_SCALE			1000
 
 #define FXLS8962AF_AUTO_SUSPEND_DELAY_MS	2000
 
@@ -439,8 +441,16 @@ static int fxls8962af_read_raw(struct iio_dev *indio_dev,
 		*val = FXLS8962AF_TEMP_CENTER_VAL;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
-		*val = 0;
-		return fxls8962af_read_full_scale(data, val2);
+		switch (chan->type) {
+		case IIO_TEMP:
+			*val = FXLS8962AF_TEMP_SCALE;
+			return IIO_VAL_INT;
+		case IIO_ACCEL:
+			*val = 0;
+			return fxls8962af_read_full_scale(data, val2);
+		default:
+			return -EINVAL;
+		}
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		return fxls8962af_read_samp_freq(data, val, val2);
 	default:
@@ -736,6 +746,7 @@ static const struct iio_event_spec fxls8962af_event[] = {
 	.type = IIO_TEMP, \
 	.address = FXLS8962AF_TEMP_OUT, \
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+			      BIT(IIO_CHAN_INFO_SCALE) | \
 			      BIT(IIO_CHAN_INFO_OFFSET),\
 	.scan_index = -1, \
 	.scan_type = { \

-- 
2.47.1