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iio: imu: mpu6050: add level shifter flag

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Some boards fail in magnetometer probe if level shifter flag is not set,
definition was found in the vendor Linux kernel v3.0.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Link: https://lore.kernel.org/r/20230927173245.2151083-3-andreas@kemnade.info
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andreas Kemnade
2023-09-27 19:32:44 +02:00
committed by Jonathan Cameron
parent 14114c8a74
commit c48fb9f956
3 changed files with 17 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/iio/imu/inv_mpu6050/inv_mpu_aux.c
View File

@@ -71,6 +71,19 @@ int inv_mpu_aux_init(const struct inv_mpu6050_state *st)
unsigned int val;
int ret;
/*
* Code based on the vendor Linux kernel v3.0,
* the exact meaning is unknown.
*/
if (st->chip_type == INV_MPU9150) {
unsigned int mask = BIT(7);
val = st->level_shifter ? mask : 0;
ret = regmap_update_bits(st->map, 0x1, mask, val);
if (ret)
return ret;
}
/* configure i2c master */
val = INV_MPU6050_BITS_I2C_MST_CLK_400KHZ |
INV_MPU6050_BIT_WAIT_FOR_ES;

3
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
View File

@@ -17,6 +17,7 @@
#include <linux/regulator/consumer.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/iio/common/inv_sensors_timestamp.h>
#include <linux/iio/iio.h>
@@ -1495,6 +1496,8 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
st->irq = irq;
st->map = regmap;
st->level_shifter = device_property_read_bool(dev,
"invensense,level-shifter");
pdata = dev_get_platdata(dev);
if (!pdata) {
result = iio_read_mount_matrix(dev, &st->orientation);

1
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
View File

@@ -203,6 +203,7 @@ struct inv_mpu6050_state {
s32 magn_raw_to_gauss[3];
struct iio_mount_matrix magn_orient;
unsigned int suspended_sensors;
bool level_shifter;
u8 *data;
};