Messages in this thread Patch in this message | | | From | satya priya <> | Subject | [PATCH V2 3/3] tty: serial: qcom_geni_serial: Fix the UART wakeup issue | Date | Fri, 24 Jul 2020 09:28:02 +0530 |
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As a part of system suspend we call uart_port_suspend from the Serial driver, which calls set_mctrl passing mctrl as NULL. This makes RFR high(NOT_READY) during suspend.
Due to this BT SoC is not able to send wakeup bytes to UART during suspend. Included if check for non-suspend case to keep RFR low during suspend.
Signed-off-by: satya priya <skakit@codeaurora.org> --- Changes in V2: - This patch fixes the UART flow control issue during suspend. Newly added in V2.
drivers/tty/serial/qcom_geni_serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 07b7b6b..7108dfc 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -242,7 +242,7 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport, if (mctrl & TIOCM_LOOP) port->loopback = RX_TX_CTS_RTS_SORTED; - if (!(mctrl & TIOCM_RTS)) + if ((!(mctrl & TIOCM_RTS)) && (!(uport->suspended))) uart_manual_rfr = UART_MANUAL_RFR_EN | UART_RFR_NOT_READY; writel(uart_manual_rfr, uport->membase + SE_UART_MANUAL_RFR); } -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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