iio:adis: Add support for manual self-test flag clear

Some variants of the devices from the ADIS family don't auto-clear the
self-test bit after the self-test has completed. Instead we have to
manually clear. Add support for this to the ADIS library.

Signed-off-by: Lars-Peter Clausen <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/imu/adis.c

···
 
 	msleep(adis->data->startup_delay);
 
-	return adis_check_status(adis);
+	ret = adis_check_status(adis);
+
+	if (adis->data->self_test_no_autoclear)
+		adis_write_reg_16(adis, adis->data->msc_ctrl_reg, 0x00);
+
+	return ret;
 }
 
 /**

include/linux/iio/imu/adis.h

···
 	unsigned int diag_stat_reg;
 
 	unsigned int self_test_mask;
+	bool self_test_no_autoclear;
 	unsigned int startup_delay;
 
 	const char * const *status_error_msgs;