linux-kernel - [PATCH v4 03/13] USB: ch341: add definitions for modem control

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Date:	Fri, 15 Apr 2016 23:14:06 +0200
From:	Grigori Goronzy <greg@...wn.ath.cx>
To:	Johan Hovold <johan@...nel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Grigori Goronzy <greg@...wn.ath.cx>
Subject: [PATCH v4 03/13] USB: ch341: add definitions for modem control

Signed-off-by: Grigori Goronzy <greg@...wn.ath.cx>
---
 drivers/usb/serial/ch341.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 1ab4384..db4b561 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -61,6 +61,7 @@
  * the Net/FreeBSD uchcom.c driver by Takanori Watanabe.  Domo arigato.
  */
 
+#define CH341_MODEM_CTRL       0xA4
 #define CH341_REQ_WRITE_REG    0x9A
 #define CH341_REQ_READ_REG     0x95
 #define CH341_REG_BREAK1       0x05
@@ -162,7 +163,7 @@ static int ch341_set_baudrate(struct usb_device *dev,
 
 static int ch341_set_handshake(struct usb_device *dev, u8 control)
 {
-	return ch341_control_out(dev, 0xa4, ~control, 0);
+	return ch341_control_out(dev, CH341_MODEM_CTRL, ~control, 0);
 }
 
 static int ch341_get_status(struct usb_device *dev, struct ch341_private *priv)
-- 
1.9.1