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serial: 8250: Move ns16550a_goto_hispeed() to local header

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Prepare for 8250_core.c file split; move shared inline function
to local header file.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2015-02-24 14:25:04 -05:00 committed by Greg Kroah-Hartman
parent 5db496b9c8
commit d81e50f616
2 changed files with 17 additions and 18 deletions
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18
drivers/tty/serial/8250/8250.h
View File

@ -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;
}

17
drivers/tty/serial/8250/8250_core.c
View File

@ -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