diff mbox series

[08/10] USB: serial: xr: fix gpio-mode handling

Message ID 20210121102922.17439-10-johan@kernel.org
State New
Headers show
Series None | expand

Commit Message

Johan Hovold Jan. 21, 2021, 10:29 a.m. UTC 
Fix the gpio-mode handling so that all the pins are under driver control
(i.e. in gpio mode) when hardware flow control is disabled.

This is specifically needed to be able to control RTS.

Fixes: a8f54b7bd132 ("USB: serial: add MaxLinear/Exar USB to Serial driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/xr_serial.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/serial/xr_serial.c b/drivers/usb/serial/xr_serial.c
index fc727f4283f2..183731cd2ef7 100644
--- a/drivers/usb/serial/xr_serial.c
+++ b/drivers/usb/serial/xr_serial.c
@@ -408,14 +408,11 @@  static void xr_set_flow_mode(struct tty_struct *tty,
 	if (ret)
 		return;
 
+	/* Set GPIO mode for controlling the pins manually by default. */
+	gpio_mode &= ~XR21V141X_UART_MODE_GPIO_MASK;
+
 	if (C_CRTSCTS(tty)) {
 		dev_dbg(&port->dev, "Enabling hardware flow ctrl\n");
-
-		/*
-		 * RTS/CTS is the default flow control mode, so set GPIO mode
-		 * for controlling the pins manually by default.
-		 */
-		gpio_mode &= ~XR21V141X_UART_MODE_GPIO_MASK;
 		gpio_mode |= XR21V141X_UART_MODE_RTS_CTS;
 		flow = XR21V141X_UART_FLOW_MODE_HW;
 	} else if (I_IXON(tty)) {