diff options
| -rw-r--r-- | drivers/tty/serial/8250/8250.h | 22 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 21 |
2 files changed, 22 insertions, 21 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 5a4e05c0e552..d70adaa3b117 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -123,6 +123,28 @@ static inline void serial_out(struct uart_8250_port *up, int offset, int value) up->port.serial_out(&up->port, offset, value); } +/* + * For the 16C950 + */ +static void serial_icr_write(struct uart_8250_port *up, int offset, int value) +{ + serial_out(up, UART_SCR, offset); + serial_out(up, UART_ICR, value); +} + +static unsigned int __maybe_unused serial_icr_read(struct uart_8250_port *up, + int offset) +{ + unsigned int value; + + serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD); + serial_out(up, UART_SCR, offset); + value = serial_in(up, UART_ICR); + serial_icr_write(up, UART_ACR, up->acr); + + return value; +} + void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p); static inline int serial_dl_read(struct uart_8250_port *up) diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 9b1d47ef15c0..5591f18f2ea9 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -538,27 +538,6 @@ serial_port_out_sync(struct uart_port *p, int offset, int value) } /* - * For the 16C950 - */ -static void serial_icr_write(struct uart_8250_port *up, int offset, int value) -{ - serial_out(up, UART_SCR, offset); - serial_out(up, UART_ICR, value); -} - -static unsigned int serial_icr_read(struct uart_8250_port *up, int offset) -{ - unsigned int value; - - serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD); - serial_out(up, UART_SCR, offset); - value = serial_in(up, UART_ICR); - serial_icr_write(up, UART_ACR, up->acr); - - return value; -} - -/* * FIFO support. */ static void serial8250_clear_fifos(struct uart_8250_port *p) |