[v2,2/6] serial: 8250: Name MSR literals
Commit Message
Add UART_MSR_STATUS_BITS for CD, RI, DSR & CTS. Use names for the
literal.
Don't make the define for combined flags part of UAPI.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
drivers/tty/serial/8250/8250_port.c | 4 ++--
include/linux/serial.h | 5 +++++
2 files changed, 7 insertions(+), 2 deletions(-)
@@ -1268,9 +1268,9 @@ static void autoconfig(struct uart_8250_port *up)
*/
if (!(port->flags & UPF_SKIP_TEST)) {
serial8250_out_MCR(up, UART_MCR_LOOP | 0x0A);
- status1 = serial_in(up, UART_MSR) & 0xF0;
+ status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS;
serial8250_out_MCR(up, save_mcr);
- if (status1 != 0x90) {
+ if (status1 != (UART_MSR_DCD | UART_MSR_CTS)) {
spin_unlock_irqrestore(&port->lock, flags);
DEBUG_AUTOCONF("LOOP test failed (%02x) ",
status1);
@@ -28,6 +28,11 @@ static inline bool uart_lsr_tx_empty(u16 lsr)
return (lsr & UART_LSR_BOTH_EMPTY) == UART_LSR_BOTH_EMPTY;
}
+#define UART_MSR_STATUS_BITS (UART_MSR_DCD | \
+ UART_MSR_RI | \
+ UART_MSR_DSR | \
+ UART_MSR_CTS)
+
/*
* Counters of the input lines (CTS, DSR, RI, CD) interrupts
*/