Merge pull request #28 from analogdevicesinc/fix-low-rate-enable

ad9361_baseband_auto_rate: Fix low rate filter enable

ad9361_baseband_auto_rate.c

@@ -143,6 +143,23 @@ int ad9361_set_bb_rate(struct iio_device *dev, unsigned long rate)
 		return ret;
 
 	if (rate <= (25000000 / 12))  {
+		int dacrate, txrate, max;
+		char readbuf[100];
+
+		ret = iio_device_attr_read(dev, "tx_path_rates", readbuf, sizeof(readbuf));
+		if (ret < 0)
+			return ret;
+		ret = sscanf(readbuf, "BBPLL:%*d DAC:%d T2:%*d T1:%*d TF:%*d TXSAMP:%d", &dacrate, &txrate);
+		if (ret != 2)
+			return -EFAULT;
+
+		if (txrate == 0)
+			return -EINVAL;
+
+		max = (dacrate / txrate) * 16;
+		if (max < taps)
+			iio_channel_attr_write_longlong(chan, "sampling_frequency", 3000000);
+
 		ret = ad9361_set_trx_fir_enable(dev, true);
 		if (ret < 0)
 			return ret;