/*
* This driver and the hardware supported are in term of EE-191 of ADI.
- * http://www.analog.com/UploadedFiles/Application_Notes/399447663EE191.pdf
+ * http://www.analog.com/static/imported-files/application_notes/EE191.pdf
* This application note describe how to implement a UART on a Sharc DSP,
* but this driver is implemented on Blackfin Processor.
* Transmit Frame Sync is not used by this driver to transfer data out.
pr_debug("%s RCR1:%x, RCR2:%x\n", __func__, SPORT_GET_RCR1(up), SPORT_GET_RCR2(up));
tclkdiv = sclk / (2 * baud_rate) - 1;
- rclkdiv = sclk / (2 * baud_rate * 2) - 1;
+ /* The actual uart baud rate of devices vary between +/-2%. The sport
+ * RX sample rate should be faster than the double of the worst case,
+ * otherwise, wrong data are received. So, set sport RX clock to be
+ * 3% faster.
+ */
+ rclkdiv = sclk / (2 * baud_rate * 2 * 97 / 100) - 1;
SPORT_PUT_TCLKDIV(up, tclkdiv);
SPORT_PUT_RCLKDIV(up, rclkdiv);
SSYNC();