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Commit 095ed32d authored by Mitul Golani's avatar Mitul Golani Committed by Gerrit - the friendly Code Review server
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serial: msm_serial_hs: Align to HW assisted flow control support 



If client enables HW AUTOCTS mode then set UPSTAT_AUTOCTS,otherwise
serial core disables TX fully at the framework layer and
no communication happens.

Signed-off-by: default avatarMitul Golani <mgolani@codeaurora.org>
Change-Id: I13d6048fc2aeacd2f0078fc38f43e07cfd5a5850
parent 4efd54ad

drivers/tty/serial/msm_serial_hs.c

+3 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
 * MSM 7k High speed uart driver

 *

 * Copyright (c) 2008 Google Inc.

 * Copyright (c) 2007-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2007-2019, The Linux Foundation. All rights reserved.

 * Modified: Nick Pelly <npelly@google.com>

 *

 * All source code in this file is licensed under the following license
@@ -1185,6 +1185,7 @@ static void msm_hs_set_termios(struct uart_port *uport, 
		data |= EIGHT_BPC;

		break;

	}

	uport->status  &= ~(UPSTAT_AUTOCTS);

	/* stop bits */

	if (c_cflag & CSTOPB) {

		data |= STOP_BIT_TWO;
@@ -1229,6 +1230,7 @@ static void msm_hs_set_termios(struct uart_port *uport, 
	if (c_cflag & CRTSCTS) {

		data |= UARTDM_MR1_CTS_CTL_BMSK;

		data |= UARTDM_MR1_RX_RDY_CTL_BMSK;

		uport->status |= UPSTAT_AUTOCTS;

		msm_uport->flow_control = true;

	}

	msm_hs_write(uport, UART_DM_MR1, data);