staging: IIO: IMU: ADIS16400: Add delay after self test

Add delay after self test to satisfy timing requirements.
Increase start-up delay.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
CC: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/imu/adis16400.h

@@ -17,7 +17,8 @@
 #ifndef SPI_ADIS16400_H_
 #define SPI_ADIS16400_H_
 
-#define ADIS16400_STARTUP_DELAY	220 /* ms */
+#define ADIS16400_STARTUP_DELAY	290 /* ms */
+#define ADIS16400_MTEST_DELAY 90 /* ms */
 
 #define ADIS16400_READ_REG(a)    a
 #define ADIS16400_WRITE_REG(a) ((a) | 0x80)

drivers/staging/iio/imu/adis16400_core.c

@@ -373,7 +373,7 @@ static int adis16400_self_test(struct device *dev)
 		dev_err(dev, "problem starting self test");
 		goto err_ret;
 	}
-
+	msleep(ADIS16400_MTEST_DELAY);
 	adis16400_check_status(dev);
 
 err_ret: