From d31f74e60804cba1d7b265708b820e524e574611 Mon Sep 17 00:00:00 2001
From: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Date: Thu, 6 Feb 2020 11:31:02 +0100
Subject: [PATCH] iio: imu: inv_mpu6050: add support of IAM20680

Automotive certified IMU, similar to ICM20608.

Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/imu/inv_mpu6050/Kconfig        | 4 ++--
 drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 8 ++++++++
 drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c  | 6 ++++++
 drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h  | 2 ++
 drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c  | 5 +++++
 5 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/imu/inv_mpu6050/Kconfig b/drivers/iio/imu/inv_mpu6050/Kconfig
index e933db3a5a89..e65474a64675 100644
--- a/drivers/iio/imu/inv_mpu6050/Kconfig
+++ b/drivers/iio/imu/inv_mpu6050/Kconfig
@@ -16,7 +16,7 @@ config INV_MPU6050_I2C
 	select REGMAP_I2C
 	help
 	  This driver supports the Invensense MPU6050/9150,
-	  MPU6500/6515/9250/9255, ICM20608/20609/20689 and ICM20602
+	  MPU6500/6515/9250/9255, ICM20608/20609/20689, ICM20602 and IAM20680
 	  motion tracking devices over I2C.
 	  This driver can be built as a module. The module will be called
 	  inv-mpu6050-i2c.
@@ -28,7 +28,7 @@ config INV_MPU6050_SPI
 	select REGMAP_SPI
 	help
 	  This driver supports the Invensense MPU6000,
-	  MPU6500/6515/9250/9255, ICM20608/20609/20689 and ICM20602
+	  MPU6500/6515/9250/9255, ICM20608/20609/20689, ICM20602 and IAM20680
 	  motion tracking devices over SPI.
 	  This driver can be built as a module. The module will be called
 	  inv-mpu6050-spi.
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 5fd57a1bee90..e8e6beef3f04 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -200,6 +200,14 @@ static const struct inv_mpu6050_hw hw_info[] = {
 		.fifo_size = 1008,
 		.temp = {INV_ICM20608_TEMP_OFFSET, INV_ICM20608_TEMP_SCALE},
 	},
+	{
+		.whoami = INV_IAM20680_WHOAMI_VALUE,
+		.name = "IAM20680",
+		.reg = &reg_set_6500,
+		.config = &chip_config_6050,
+		.fifo_size = 512,
+		.temp = {INV_ICM20608_TEMP_OFFSET, INV_ICM20608_TEMP_SCALE},
+	},
 };
 
 int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
index dd054e21216a..cd0eeb5dc7f6 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
@@ -64,6 +64,7 @@ static bool inv_mpu_i2c_aux_bus(struct device *dev)
 	case INV_ICM20609:
 	case INV_ICM20689:
 	case INV_ICM20602:
+	case INV_IAM20680:
 		/* no i2c auxiliary bus on the chip */
 		return false;
 	case INV_MPU9150:
@@ -207,6 +208,7 @@ static const struct i2c_device_id inv_mpu_id[] = {
 	{"icm20609", INV_ICM20609},
 	{"icm20689", INV_ICM20689},
 	{"icm20602", INV_ICM20602},
+	{"iam20680", INV_IAM20680},
 	{}
 };
 
@@ -253,6 +255,10 @@ static const struct of_device_id inv_of_match[] = {
 		.compatible = "invensense,icm20602",
 		.data = (void *)INV_ICM20602
 	},
+	{
+		.compatible = "invensense,iam20680",
+		.data = (void *)INV_IAM20680
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, inv_of_match);
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index 75b8903450eb..404c289f8c84 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -78,6 +78,7 @@ enum inv_devices {
 	INV_ICM20609,
 	INV_ICM20689,
 	INV_ICM20602,
+	INV_IAM20680,
 	INV_NUM_PARTS
 };
 
@@ -346,6 +347,7 @@ struct inv_mpu6050_state {
 #define INV_ICM20609_WHOAMI_VALUE		0xA6
 #define INV_ICM20689_WHOAMI_VALUE		0x98
 #define INV_ICM20602_WHOAMI_VALUE		0x12
+#define INV_IAM20680_WHOAMI_VALUE		0xA9
 
 /* scan element definition for generic MPU6xxx devices */
 enum inv_mpu6050_scan {
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
index 3803c40e7b24..393cec555be6 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
@@ -84,6 +84,7 @@ static const struct spi_device_id inv_mpu_id[] = {
 	{"icm20609", INV_ICM20609},
 	{"icm20689", INV_ICM20689},
 	{"icm20602", INV_ICM20602},
+	{"iam20680", INV_IAM20680},
 	{}
 };
 
@@ -126,6 +127,10 @@ static const struct of_device_id inv_of_match[] = {
 		.compatible = "invensense,icm20602",
 		.data = (void *)INV_ICM20602
 	},
+	{
+		.compatible = "invensense,iam20680",
+		.data = (void *)INV_IAM20680
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, inv_of_match);