diff options
| author | Sonic Zhang <sonic.zhang@analog.com> | 2009-06-11 13:50:20 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-11 08:51:04 -0700 |
| commit | 84507794a9d5d4decd6bc9c111480076dba0d301 (patch) | |
| tree | bb27aec4bfe27c691ae2bf7740e2ed93ac41bdc6 /drivers/serial/bfin_5xx.c | |
| parent | 0efa4f2c944fabffc81918cc86d4d17dba39a021 (diff) | |
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: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial/bfin_5xx.c')
| -rw-r--r-- | drivers/serial/bfin_5xx.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index ab583ef3a305..64603f5bb703 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -828,8 +828,16 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, __func__); } - if (termios->c_cflag & CSTOPB) - lcr |= STB; + /* 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; + } if (termios->c_cflag & PARENB) lcr |= PEN; if (!(termios->c_cflag & PARODD)) |