extcon: Introduce EXTCON_PROP_USB_SS property for SuperSpeed mode

EXTCON_PROP_USB_SS (SuperSpeed)[1] is necessary to distinguish
between USB/USB2 and USB3 connections on USB Type-C cables.

[1] https://en.wikipedia.org/wiki/USB#Overview

Cc: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 461abee..b34d1ae 100644 (file)
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -109,12 +109,18 @@
  * @type:      integer (intval)
  * @value:     0 (normal) or 1 (flip)
  * @default:   0 (normal)
+ * - EXTCON_PROP_USB_SS (SuperSpeed)
+ * @type:       integer (intval)
+ * @value:      0 (USB/USB2) or 1 (USB3)
+ * @default:    0 (USB/USB2)
+ *
  */
 #define EXTCON_PROP_USB_VBUS           0
 #define EXTCON_PROP_USB_TYPEC_POLARITY 1
+#define EXTCON_PROP_USB_SS             2
 
 #define EXTCON_PROP_USB_MIN            0
-#define EXTCON_PROP_USB_MAX            1
+#define EXTCON_PROP_USB_MAX            2
 #define EXTCON_PROP_USB_CNT    (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
 
 /* Properties of EXTCON_TYPE_CHG. */