diff options
| -rw-r--r-- | drivers/tty/serial/8250/8250.h | 18 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 17 |
2 files changed, 17 insertions, 18 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 656ecc6..23dc9f9 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -21,7 +21,6 @@ struct uart_8250_dma { /* Filter function */ dma_filter_fn fn; - /* Parameter to the filter function */ void *rx_param; void *tx_param; @@ -198,3 +197,20 @@ static inline int serial8250_request_dma(struct uart_8250_port *p) } static inline void serial8250_release_dma(struct uart_8250_port *p) { } #endif + +static inline int ns16550a_goto_highspeed(struct uart_8250_port *up) +{ + unsigned char status; + + status = serial_in(up, 0x04); /* EXCR2 */ +#define PRESL(x) ((x) & 0x30) + if (PRESL(status) == 0x10) { + /* already in high speed mode */ + return 0; + } else { + status &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ + status |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ + serial_out(up, 0x04, status); + } + return 1; +} diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 97bcfea..0cf9b85 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -903,23 +903,6 @@ static int broken_efr(struct uart_8250_port *up) return 0; } -static inline int ns16550a_goto_highspeed(struct uart_8250_port *up) -{ - unsigned char status; - - status = serial_in(up, 0x04); /* EXCR2 */ -#define PRESL(x) ((x) & 0x30) - if (PRESL(status) == 0x10) { - /* already in high speed mode */ - return 0; - } else { - status &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ - status |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ - serial_out(up, 0x04, status); - } - return 1; -} - /* * We know that the chip has FIFOs. Does it have an EFR? The * EFR is located in the same register position as the IIR and |