Commit 84507794 authored by Sonic Zhang's avatar Sonic Zhang Committed by Linus Torvalds

Blackfin Serial Driver: handle anomaly 05000231

05000231 - UART STB Bit Incorrectly Affects Receiver Setting
For processors affected by this, we cannot safely allow CSTOPB to be set
as the UART will then be unable to properly clock in bytes.
Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0efa4f2c
...@@ -828,8 +828,16 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, ...@@ -828,8 +828,16 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
__func__); __func__);
} }
if (termios->c_cflag & CSTOPB) /* Anomaly notes:
* 05000231 - STOP bit is always set to 1 whatever the user is set.
*/
if (termios->c_cflag & CSTOPB) {
if (ANOMALY_05000231)
printk(KERN_WARNING "STOP bits other than 1 is not "
"supported in case of anomaly 05000231.\n");
else
lcr |= STB; lcr |= STB;
}
if (termios->c_cflag & PARENB) if (termios->c_cflag & PARENB)
lcr |= PEN; lcr |= PEN;
if (!(termios->c_cflag & PARODD)) if (!(termios->c_cflag & PARODD))
......
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