Hello Stephan,
MPU-6880 is similar to MPU-6500. It should share the same registers map as far as I know.
Seems good to me. Please also update Kconfig to add MPU6880 in the list for I2C and for SPI.
Thanks for the patch,
JB
From: Stephan Gerhold <stephan@xxxxxxxxxxx>
Sent: Wednesday, December 2, 2020 11:13
To: Jonathan Cameron <jic23@xxxxxxxxxx>
Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>; Peter Meerwald-Stadler <pmeerw@xxxxxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>; linux-iio@xxxxxxxxxxxxxxx <linux-iio@xxxxxxxxxxxxxxx>; devicetree@xxxxxxxxxxxxxxx <devicetree@xxxxxxxxxxxxxxx>; Jean-Baptiste Maneyrol <JManeyrol@xxxxxxxxxxxxxx>; Stephan Gerhold <stephan@xxxxxxxxxxx>
Subject: [PATCH 2/2] iio: imu: inv_mpu6050: Add support for MPU-6880
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MPU-6880 seems to be very similar to MPU-6500 / MPU-6050 and it works
fine with some minor additions for the mpu6050 driver.
Add the necessary defines for it and make it use the same registers as
MPU-6500 but with a FIFO size of 4096.
Cc: Jean-Baptiste Maneyrol <jmaneyrol@xxxxxxxxxxxxxx>
Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
---
I tested this on a Xiaomi Redmi 2 (or Wingtech WT88047).
Unfortunately I was not able to find a proper register description
for MPU-6880. :( It seems to work fine with both 6050 or 6500 registers
but I guess that it is more similar to MPU-6500. Not sure though.
I'm mainly unsure about
.accl_offset = INV_MPU6500_REG_ACCEL_OFFSET,
vs
.accl_offset = INV_MPU6050_REG_ACCEL_OFFSET,
Both registers read some funny values but I cannot say which one
is more appropriate...
Perhaps Jean-Baptiste can shed some light on this? :)
---
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 9 +++++++++
drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c | 5 +++++
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 2 ++
drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c | 5 +++++
4 files changed, 21 insertions(+)
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 18a1898e3e34..453c51c79655 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -160,6 +160,14 @@ static const struct inv_mpu6050_hw hw_info[] = {
.fifo_size = 512,
.temp = {INV_MPU6500_TEMP_OFFSET, INV_MPU6500_TEMP_SCALE},
},
+ {
+ .whoami = INV_MPU6880_WHOAMI_VALUE,
+ .name = "MPU6880",
+ .reg = ®_set_6500,
+ .config = &chip_config_6500,
+ .fifo_size = 4096,
+ .temp = {INV_MPU6500_TEMP_OFFSET, INV_MPU6500_TEMP_SCALE},
+ },
{
.whoami = INV_MPU6000_WHOAMI_VALUE,
.name = "MPU6000",
@@ -1323,6 +1331,7 @@ static int inv_check_and_setup_chip(struct inv_mpu6050_state *st)
case INV_MPU6000:
case INV_MPU6500:
case INV_MPU6515:
+ case INV_MPU6880:
case INV_MPU9250:
case INV_MPU9255:
/* reset signal path (required for spi connection) */
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
index 28cfae1e61cf..95f16951c8f4 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
@@ -177,6 +177,7 @@ static const struct i2c_device_id inv_mpu_id[] = {
{"mpu6050", INV_MPU6050},
{"mpu6500", INV_MPU6500},
{"mpu6515", INV_MPU6515},
+ {"mpu6880", INV_MPU6880},
{"mpu9150", INV_MPU9150},
{"mpu9250", INV_MPU9250},
{"mpu9255", INV_MPU9255},
@@ -204,6 +205,10 @@ static const struct of_device_id inv_of_match[] = {
.compatible = "invensense,mpu6515",
.data = (void *)INV_MPU6515
},
+ {
+ .compatible = "invensense,mpu6880",
+ .data = (void *)INV_MPU6880
+ },
{
.compatible = "invensense,mpu9150",
.data = (void *)INV_MPU9150
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index eb522b38acf3..58188dc0dd13 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -70,6 +70,7 @@ enum inv_devices {
INV_MPU6050,
INV_MPU6500,
INV_MPU6515,
+ INV_MPU6880,
INV_MPU6000,
INV_MPU9150,
INV_MPU9250,
@@ -373,6 +374,7 @@ struct inv_mpu6050_state {
#define INV_MPU6000_WHOAMI_VALUE 0x68
#define INV_MPU6050_WHOAMI_VALUE 0x68
#define INV_MPU6500_WHOAMI_VALUE 0x70
+#define INV_MPU6880_WHOAMI_VALUE 0x78
#define INV_MPU9150_WHOAMI_VALUE 0x68
#define INV_MPU9250_WHOAMI_VALUE 0x71
#define INV_MPU9255_WHOAMI_VALUE 0x73
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
index 6f968ce687e1..b056f3fe2561 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
@@ -70,6 +70,7 @@ static const struct spi_device_id inv_mpu_id[] = {
{"mpu6000", INV_MPU6000},
{"mpu6500", INV_MPU6500},
{"mpu6515", INV_MPU6515},
+ {"mpu6880", INV_MPU6880},
{"mpu9250", INV_MPU9250},
{"mpu9255", INV_MPU9255},
{"icm20608", INV_ICM20608},
@@ -96,6 +97,10 @@ static const struct of_device_id inv_of_match[] = {
.compatible = "invensense,mpu6515",
.data = (void *)INV_MPU6515
},
+ {
+ .compatible = "invensense,mpu6880",
+ .data = (void *)INV_MPU6880
+ },
{
.compatible = "invensense,mpu9250",
.data = (void *)INV_MPU9250
--
2.29.2
