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serial: 8250_lpss: Extract dw8250_do_set_termios() for common use

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Some of the code currently used in dw8250_set_termios(), byt_set_termios()
may be reused by other methods in the future. Extract it to a common helper
function.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211005133026.21488-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-10-05 16:30:25 +03:00 committed by Greg Kroah-Hartman
parent 0eb9da9cf2
commit 7c4fc082f5
4 changed files with 13 additions and 10 deletions
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6
drivers/tty/serial/8250/8250_dw.c
View File

@ -350,11 +350,7 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios,
}
clk_prepare_enable(d->clk);
p->status &= ~UPSTAT_AUTOCTS;
if (termios->c_cflag & CRTSCTS)
p->status |= UPSTAT_AUTOCTS;
serial8250_do_set_termios(p, termios, old);
dw8250_do_set_termios(p, termios, old);
}
static void dw8250_set_ldisc(struct uart_port *p, struct ktermios *termios)

10
drivers/tty/serial/8250/8250_dwlib.c
View File

@ -77,6 +77,16 @@ static void dw8250_set_divisor(struct uart_port *p, unsigned int baud,
serial8250_do_set_divisor(p, baud, quot, quot_frac);
}
void dw8250_do_set_termios(struct uart_port *p, struct ktermios *termios, struct ktermios *old)
{
p->status &= ~UPSTAT_AUTOCTS;
if (termios->c_cflag & CRTSCTS)
p->status |= UPSTAT_AUTOCTS;
serial8250_do_set_termios(p, termios, old);
}
EXPORT_SYMBOL_GPL(dw8250_do_set_termios);
void dw8250_setup_port(struct uart_port *p)
{
struct uart_8250_port *up = up_to_u8250p(p);

1
drivers/tty/serial/8250/8250_dwlib.h
View File

@ -16,4 +16,5 @@ struct dw8250_port_data {
u8 dlf_size;
};
void dw8250_do_set_termios(struct uart_port *p, struct ktermios *termios, struct ktermios *old);
void dw8250_setup_port(struct uart_port *p);

6
drivers/tty/serial/8250/8250_lpss.c
View File

@ -100,11 +100,7 @@ static void byt_set_termios(struct uart_port *p, struct ktermios *termios,
reg |= BYT_PRV_CLK_EN | BYT_PRV_CLK_UPDATE;
writel(reg, p->membase + BYT_PRV_CLK);
p->status &= ~UPSTAT_AUTOCTS;
if (termios->c_cflag & CRTSCTS)
p->status |= UPSTAT_AUTOCTS;
serial8250_do_set_termios(p, termios, old);
dw8250_do_set_termios(p, termios, old);
}
static unsigned int byt_get_mctrl(struct uart_port *port)