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patch "iio: imu: fxos8700: fix incorrect ODR mode readback" added to char-misc-linus

PATCH [email protected] 1 participant 1 message Jan 31, 2023

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This is a note to let you know that I've just added the patch titled

iio: imu: fxos8700: fix incorrect ODR mode readback

to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 78ad6864e9e012cdba7c353d044d21ffcfd5f34b Mon Sep 17 00:00:00 2001
From: Carlos Song <[email protected]>
Date: Wed, 18 Jan 2023 15:42:24 +0800
Subject: iio: imu: fxos8700: fix incorrect ODR mode readback

The absence of a correct offset leads an incorrect ODR mode readback after use a hexadecimal number to mark the value from FXOS8700_CTRL_REG1.

Get ODR mode by field mask and FIELD_GET clearly and conveniently. And attach other additional fix for keeping the original code logic and a good readability.

Fixes 84e5ddd5c46e ("iio: imu: Add support for the FXOS8700 IMU")
Signed-off-by Carlos Song <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Cc <[email protected]>
Signed-off-by Jonathan Cameron <[email protected]>
---
 drivers/iio/imu/fxos8700_core.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
drivers/iio/imu/fxos8700_core.c +6 -6
index ec622123ccac..caa474402d53 100644
@@ -10,6 +10,7 @@
 #include <linux/regmap.h>
 #include <linux/acpi.h>
 #include <linux/bitops.h>
+#include <linux/bitfield.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>

@@ -144,9 +145,9 @@
 #define FXOS8700_NVM_DATA_BNK0      0xa7
 
 /* Bit definitions for FXOS8700_CTRL_REG1 */
-#define FXOS8700_CTRL_ODR_MSK       0x38
 #define FXOS8700_CTRL_ODR_MAX       0x00
 #define FXOS8700_CTRL_ODR_MIN       GENMASK(4, 3)
+#define FXOS8700_CTRL_ODR_MSK       GENMASK(5, 3)
 
 /* Bit definitions for FXOS8700_M_CTRL_REG1 */
 #define FXOS8700_HMS_MASK           GENMASK(1, 0)

@@ -508,10 +509,9 @@ static int fxos8700_set_odr(struct fxos8700_data *data, enum fxos8700_sensor t,
 	if (i >= odr_num)
 		return -EINVAL;
 
-	return regmap_update_bits(data->regmap,
-				  FXOS8700_CTRL_REG1,
-				  FXOS8700_CTRL_ODR_MSK + FXOS8700_ACTIVE,
-				  fxos8700_odr[i].bits << 3 | active_mode);
+	val &= ~FXOS8700_CTRL_ODR_MSK;
+	val |= FIELD_PREP(FXOS8700_CTRL_ODR_MSK, fxos8700_odr[i].bits) | FXOS8700_ACTIVE;
+	return regmap_write(data->regmap, FXOS8700_CTRL_REG1, val);
 }
 
 static int fxos8700_get_odr(struct fxos8700_data *data, enum fxos8700_sensor t,

@@ -524,7 +524,7 @@ static int fxos8700_get_odr(struct fxos8700_data *data, enum fxos8700_sensor t,
 	if (ret)
 		return ret;
 
-	val &= FXOS8700_CTRL_ODR_MSK;
+	val = FIELD_GET(FXOS8700_CTRL_ODR_MSK, val);
 
 	for (i = 0; i < odr_num; i++)
 		if (val == fxos8700_odr[i].bits)
Signature · 1 line
2.39.1