diff options
| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2022-06-24 23:42:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-27 15:44:20 +0300 |
| commit | 507bd6fbaaefcb8dd89bd00baddf00b439d30c51 (patch) | |
| tree | 1c40ec9c31a04d0a9c060679182dfa0ded2f27dd /drivers | |
| parent | f8ba5680a56be696b3f4343ed0a591abab807da4 (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/8250/8250.h | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 4 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 2 |
3 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 0ff5688ba90c..5cc967fe3b59 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -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; } diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 90ddc8924811..57e86133af4f 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -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 = diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 4cc69bb612ab..167a691c7b19 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -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; |