linux-kernel - [PATCH 05/22] iio: accel: adxl345: measure right-justified

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Message-Id: <20241114231002.98595-6-l.rubusch@gmail.com>
Date: Thu, 14 Nov 2024 23:09:45 +0000
From: Lothar Rubusch <l.rubusch@...il.com>
To: lars@...afoo.de,
	Michael.Hennerich@...log.com,
	jic23@...nel.org,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: l.rubusch@....ch,
	Lothar Rubusch <l.rubusch@...il.com>
Subject: [PATCH 05/22] iio: accel: adxl345: measure right-justified

Make measurements right-justified, since it is the default for the
driver and sensor. By not setting the ADXL345_DATA_FORMAT_JUSTIFY bit,
the data becomes right-judstified. This was the original setting, there
is no reason to change it to left-justified, where right-justified
simplifies working on the registers.

Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
---
 drivers/iio/accel/adxl345_core.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
index 2b62e79248..926e397678 100644
--- a/drivers/iio/accel/adxl345_core.c
+++ b/drivers/iio/accel/adxl345_core.c
@@ -184,8 +184,13 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 	struct adxl34x_state *st;
 	struct iio_dev *indio_dev;
 	u32 regval;
+
+	/* NB: ADXL345_DATA_FORMAT_JUSTIFY or 0:
+	 * do right-justified: 0, then adjust resolution according to 10-bit
+	 * through 13-bit in channel - this is the default behavior, and can
+	 * be modified here by oring ADXL345_DATA_FORMAT_JUSTIFY
+	 */
 	unsigned int data_format_mask = (ADXL345_DATA_FORMAT_RANGE |
-					 ADXL345_DATA_FORMAT_JUSTIFY |
 					 ADXL345_DATA_FORMAT_FULL_RES |
 					 ADXL345_DATA_FORMAT_SELF_TEST);
 	int ret;
-- 
2.39.2