diff options
| author | Pin-yen Lin <treapking@chromium.org> | 2024-04-24 20:58:08 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-04 18:13:46 +0200 |
| commit | 4244f830a56058ee0670d80e7ac9fd7c982eb480 (patch) | |
| tree | af364895f0acc55bf02d1da42ecddf0e1004c3bb /drivers/tty/serial | |
| parent | 70d7f1427afcf7fa2d21cb5a04c6f3555d5b9357 (diff) | |
serial: 8520_mtk: Set RTS on shutdown for Rx in-band wakeup
When Rx in-band wakeup is enabled, set RTS to true in mtk8250_shutdown()
so the connected device can still send message and trigger IRQ when the
system is suspended.
Fixes: 18c9d4a3c249 ("serial: When UART is suspended, set RTS to false")
Cc: stable <stable@kernel.org>
Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Link: https://lore.kernel.org/r/20240424130619.2924456-1-treapking@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_mtk.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 9ff6bbe9c086..d14988d1492f 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -209,15 +209,19 @@ static int mtk8250_startup(struct uart_port *port) static void mtk8250_shutdown(struct uart_port *port) { -#ifdef CONFIG_SERIAL_8250_DMA struct uart_8250_port *up = up_to_u8250p(port); struct mtk8250_data *data = port->private_data; + int irq = data->rx_wakeup_irq; +#ifdef CONFIG_SERIAL_8250_DMA if (up->dma) data->rx_status = DMA_RX_SHUTDOWN; #endif - return serial8250_do_shutdown(port); + serial8250_do_shutdown(port); + + if (irq >= 0) + serial8250_do_set_mctrl(&up->port, TIOCM_RTS); } static void mtk8250_disable_intrs(struct uart_8250_port *up, int mask) |