diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2015-01-22 12:24:26 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-02 10:11:27 -0800 |
| commit | d1f2f219319813070c022e841f48bfd0fe17fd34 (patch) | |
| tree | a2f73cb32605312c8a828c2b7151958ddbafdbfd /drivers/tty/serial | |
| parent | 01ba8d6af4b76aee99a8ae3a76748c8c36db49f3 (diff) | |
| download | linux-d1f2f219319813070c022e841f48bfd0fe17fd34.tar.gz | |
serial: 8250: Move UART_BUG_QUOT workaround
The UART_BUG_QUOT workaround adjusts the divisor computed from the baud rate by serial8250_get_divisor(). Move the workaround into serial8250_get_divisor(), so that divisor-from-baud computation is encapsulated. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index df8a5aa96bc6..8e3302c6bbff 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -2413,8 +2413,9 @@ static void serial8250_shutdown(struct uart_port *port) serial8250_do_shutdown(port); } -static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int baud) +static unsigned int serial8250_get_divisor(struct uart_8250_port *up, unsigned int baud) { + struct uart_port *port = &up->port; unsigned int quot; /* @@ -2430,6 +2431,12 @@ static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int else quot = uart_get_divisor(port, baud); + /* + * Oxford Semi 952 rev B workaround + */ + if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0) + quot++; + return quot; } @@ -2478,13 +2485,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, baud = uart_get_baud_rate(port, termios, old, port->uartclk / 16 / 0xffff, port->uartclk / 16); - quot = serial8250_get_divisor(port, baud); - - /* - * Oxford Semi 952 rev B workaround - */ - if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0) - quot++; + quot = serial8250_get_divisor(up, baud); if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) { /* NOTE: If fifo_bug is not set, a user can set RX_trigger. */ |