mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
serial: 8250: create lsr_save_mask
Allow drivers to alter LSR save mask. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220624204210.11112-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
f8ba5680a5
commit
507bd6fbaa
@ -138,7 +138,7 @@ static inline u16 serial_lsr_in(struct uart_8250_port *up)
|
||||
u16 lsr = up->lsr_saved_flags;
|
||||
|
||||
lsr |= serial_in(up, UART_LSR);
|
||||
up->lsr_saved_flags = lsr & LSR_SAVE_FLAGS;
|
||||
up->lsr_saved_flags = lsr & up->lsr_save_mask;
|
||||
|
||||
return lsr;
|
||||
}
|
||||
|
@ -1007,6 +1007,7 @@ int serial8250_register_8250_port(const struct uart_8250_port *up)
|
||||
uart->port.rs485 = up->port.rs485;
|
||||
uart->rs485_start_tx = up->rs485_start_tx;
|
||||
uart->rs485_stop_tx = up->rs485_stop_tx;
|
||||
uart->lsr_save_mask = up->lsr_save_mask;
|
||||
uart->dma = up->dma;
|
||||
|
||||
/* Take tx_loadsz from fifosize if it wasn't set separately */
|
||||
@ -1094,6 +1095,9 @@ int serial8250_register_8250_port(const struct uart_8250_port *up)
|
||||
ret = 0;
|
||||
}
|
||||
|
||||
if (!uart->lsr_save_mask)
|
||||
uart->lsr_save_mask = LSR_SAVE_FLAGS; /* Use default LSR mask */
|
||||
|
||||
/* Initialise interrupt backoff work if required */
|
||||
if (up->overrun_backoff_time_ms > 0) {
|
||||
uart->overrun_backoff_time_ms =
|
||||
|
@ -129,7 +129,7 @@ static void dw8250_tx_wait_empty(struct uart_port *p)
|
||||
|
||||
while (tries--) {
|
||||
lsr = readb (p->membase + (UART_LSR << p->regshift));
|
||||
up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
|
||||
up->lsr_saved_flags |= lsr & up->lsr_save_mask;
|
||||
|
||||
if (lsr & UART_LSR_TEMT)
|
||||
break;
|
||||
|
@ -120,6 +120,7 @@ struct uart_8250_port {
|
||||
*/
|
||||
#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
|
||||
u16 lsr_saved_flags;
|
||||
u16 lsr_save_mask;
|
||||
#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
|
||||
unsigned char msr_saved_flags;
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user