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serial: 8250: extract serial8250_set_mini()

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serial8250_do_set_termios() consists of many registers and up flags
settings. Extract all these into separate functions. This time, setting
of CSIZE for UART_CAP_MINI ports.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20250611100319.186924-19-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE)
2025-06-11 12:03:04 +02:00
committed by Greg Kroah-Hartman
parent aa05931abc
commit 0fa5aa0b59
1 changed files with 17 additions and 7 deletions
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24
drivers/tty/serial/8250/8250_port.c
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@@ -2670,6 +2670,22 @@ out_unlock:
}
EXPORT_SYMBOL_GPL(serial8250_update_uartclk);
static void serial8250_set_mini(struct uart_port *port, struct ktermios *termios)
{
struct uart_8250_port *up = up_to_u8250p(port);
if (!(up->capabilities & UART_CAP_MINI))
return;
termios->c_cflag &= ~(CSTOPB | PARENB | PARODD | CMSPAR);
tcflag_t csize = termios->c_cflag & CSIZE;
if (csize == CS5 || csize == CS6) {
termios->c_cflag &= ~CSIZE;
termios->c_cflag |= CS7;
}
}
void
serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
const struct ktermios *old)
@@ -2679,14 +2695,8 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
unsigned long flags;
unsigned int baud, quot, frac = 0;
if (up->capabilities & UART_CAP_MINI) {
termios->c_cflag &= ~(CSTOPB | PARENB | PARODD | CMSPAR);
if ((termios->c_cflag & CSIZE) == CS5 ||
(termios->c_cflag & CSIZE) == CS6)
termios->c_cflag = (termios->c_cflag & ~CSIZE) | CS7;
}
serial8250_set_mini(port, termios);
cval = serial8250_compute_lcr(up, termios->c_cflag);
baud = serial8250_get_baud_rate(port, termios, old);
quot = serial8250_get_divisor(port, baud, &frac);