diff options
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_keba.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250_keba.c b/drivers/tty/serial/8250/8250_keba.c index e9e59ce79138..149953c6a288 100644 --- a/drivers/tty/serial/8250/8250_keba.c +++ b/drivers/tty/serial/8250/8250_keba.c @@ -51,6 +51,10 @@ enum kuart_mode { #define KUART_CAPABILITY_RS232 BIT(KUART_MODE_RS232) #define KUART_CAPABILITY_MASK GENMASK(3, 0) +/* registers for Indexed Control Register access in enhanced mode */ +#define KUART_EMODE_ICR_OFFSET UART_SCR +#define KUART_EMODE_ICR_VALUE UART_LSR + /* Additional Control Register DTR line configuration */ #define UART_ACR_DTRLC_MASK 0x18 #define UART_ACR_DTRLC_COMPAT 0x00 @@ -98,13 +102,13 @@ static void kuart_dtr_line_config(struct uart_8250_port *up, u8 dtrlc) u8 acr; /* set index register to 0 to access ACR register */ - serial_out(up, UART_SCR, UART_ACR); + serial_out(up, KUART_EMODE_ICR_OFFSET, UART_ACR); /* set value register to 0x10 writing DTR mode (1,0) */ - acr = serial_in(up, UART_LSR); + acr = serial_in(up, KUART_EMODE_ICR_VALUE); acr &= ~UART_ACR_DTRLC_MASK; acr |= dtrlc; - serial_out(up, UART_LSR, acr); + serial_out(up, KUART_EMODE_ICR_VALUE, acr); } static int kuart_rs485_config(struct uart_port *port, struct ktermios *termios, |