extcon: Add the extcon_type to gather each connector into five category

This patch adds the new extcon type to group the each connecotr
into following five category. This type would be used to handle
the connectors as a group unit instead of a connector unit.
- EXTCON_TYPE_USB  : USB connector
- EXTCON_TYPE_CHG  : Charger connector
- EXTCON_TYPE_JACK : Jack connector
- EXTCON_TYPE_DISP : Display connector
- EXTCON_TYPE_MISC : Miscellaneous connector

Also, each external connector is possible to belong to one more extcon type.
In caes of EXTCON_CHG_USB_SDP, it have the EXTCON_TYPE_CHG and EXTCON_TYPE_USB.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Chris Zhong <zyw@rock-chips.com>
Tested-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Reviewed-by: Guenter Roeck <groeck@chromium.org>

2 files changed, 139 insertions, 29 deletions

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 9a266e5c7e10..f209a6959fed 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -38,43 +38,144 @@
 #define SUPPORTED_CABLE_MAX	32
 #define CABLE_NAME_MAX		30
 
-static const char *extcon_name[] =  {
-	[EXTCON_NONE]			= "NONE",
+struct __extcon_info {
+	unsigned int type;
+	unsigned int id;
+	const char *name;
+
+} extcon_info[] = {
+	[EXTCON_NONE] = {
+		.type = EXTCON_TYPE_MISC,
+		.id = EXTCON_NONE,
+		.name = "NONE",
+	},
 
 	/* USB external connector */
-	[EXTCON_USB]			= "USB",
-	[EXTCON_USB_HOST]		= "USB-HOST",
+	[EXTCON_USB] = {
+		.type = EXTCON_TYPE_USB,
+		.id = EXTCON_USB,
+		.name = "USB",
+	},
+	[EXTCON_USB_HOST] = {
+		.type = EXTCON_TYPE_USB,
+		.id = EXTCON_USB_HOST,
+		.name = "USB_HOST",
+	},
 
 	/* Charging external connector */
-	[EXTCON_CHG_USB_SDP]		= "SDP",
-	[EXTCON_CHG_USB_DCP]		= "DCP",
-	[EXTCON_CHG_USB_CDP]		= "CDP",
-	[EXTCON_CHG_USB_ACA]		= "ACA",
-	[EXTCON_CHG_USB_FAST]		= "FAST-CHARGER",
-	[EXTCON_CHG_USB_SLOW]		= "SLOW-CHARGER",
+	[EXTCON_CHG_USB_SDP] = {
+		.type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+		.id = EXTCON_CHG_USB_SDP,
+		.name = "SDP",
+	},
+	[EXTCON_CHG_USB_DCP] = {
+		.type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+		.id = EXTCON_CHG_USB_DCP,
+		.name = "DCP",
+	},
+	[EXTCON_CHG_USB_CDP] = {
+		.type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+		.id = EXTCON_CHG_USB_CDP,
+		.name = "CDP",
+	},
+	[EXTCON_CHG_USB_ACA] = {
+		.type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+		.id = EXTCON_CHG_USB_ACA,
+		.name = "ACA",
+	},
+	[EXTCON_CHG_USB_FAST] = {
+		.type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+		.id = EXTCON_CHG_USB_FAST,
+		.name = "FAST-CHARGER",
+	},
+	[EXTCON_CHG_USB_SLOW] = {
+		.type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB,
+		.id = EXTCON_CHG_USB_SLOW,
+		.name = "SLOW-CHARGER",
+	},
 
 	/* Jack external connector */
-	[EXTCON_JACK_MICROPHONE]	= "MICROPHONE",
-	[EXTCON_JACK_HEADPHONE]		= "HEADPHONE",
-	[EXTCON_JACK_LINE_IN]		= "LINE-IN",
-	[EXTCON_JACK_LINE_OUT]		= "LINE-OUT",
-	[EXTCON_JACK_VIDEO_IN]		= "VIDEO-IN",
-	[EXTCON_JACK_VIDEO_OUT]		= "VIDEO-OUT",
-	[EXTCON_JACK_SPDIF_IN]		= "SPDIF-IN",
-	[EXTCON_JACK_SPDIF_OUT]		= "SPDIF-OUT",
+	[EXTCON_JACK_MICROPHONE] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_MICROPHONE,
+		.name = "MICROPHONE",
+	},
+	[EXTCON_JACK_HEADPHONE] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_HEADPHONE,
+		.name = "HEADPHONE",
+	},
+	[EXTCON_JACK_LINE_IN] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_LINE_IN,
+		.name = "LINE-IN",
+	},
+	[EXTCON_JACK_LINE_OUT] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_LINE_OUT,
+		.name = "LINE-OUT",
+	},
+	[EXTCON_JACK_VIDEO_IN] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_VIDEO_IN,
+		.name = "VIDEO-IN",
+	},
+	[EXTCON_JACK_VIDEO_OUT] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_VIDEO_OUT,
+		.name = "VIDEO-OUT",
+	},
+	[EXTCON_JACK_SPDIF_IN] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_SPDIF_IN,
+		.name = "SPDIF-IN",
+	},
+	[EXTCON_JACK_SPDIF_OUT] = {
+		.type = EXTCON_TYPE_JACK,
+		.id = EXTCON_JACK_SPDIF_OUT,
+		.name = "SPDIF-OUT",
+	},
 
 	/* Display external connector */
-	[EXTCON_DISP_HDMI]		= "HDMI",
-	[EXTCON_DISP_MHL]		= "MHL",
-	[EXTCON_DISP_DVI]		= "DVI",
-	[EXTCON_DISP_VGA]		= "VGA",
+	[EXTCON_DISP_HDMI] = {
+		.type = EXTCON_TYPE_DISP,
+		.id = EXTCON_DISP_HDMI,
+		.name = "HDMI",
+	},
+	[EXTCON_DISP_MHL] = {
+		.type = EXTCON_TYPE_DISP,
+		.id = EXTCON_DISP_MHL,
+		.name = "MHL",
+	},
+	[EXTCON_DISP_DVI] = {
+		.type = EXTCON_TYPE_DISP,
+		.id = EXTCON_DISP_DVI,
+		.name = "DVI",
+	},
+	[EXTCON_DISP_VGA] = {
+		.type = EXTCON_TYPE_DISP,
+		.id = EXTCON_DISP_VGA,
+		.name = "VGA",
+	},
 
 	/* Miscellaneous external connector */
-	[EXTCON_DOCK]			= "DOCK",
-	[EXTCON_JIG]			= "JIG",
-	[EXTCON_MECHANICAL]		= "MECHANICAL",
-
-	NULL,
+	[EXTCON_DOCK] = {
+		.type = EXTCON_TYPE_MISC,
+		.id = EXTCON_DOCK,
+		.name = "DOCK",
+	},
+	[EXTCON_JIG] = {
+		.type = EXTCON_TYPE_MISC,
+		.id = EXTCON_JIG,
+		.name = "JIG",
+	},
+	[EXTCON_MECHANICAL] = {
+		.type = EXTCON_TYPE_MISC,
+		.id = EXTCON_MECHANICAL,
+		.name = "MECHANICAL",
+	},
+
+	{ /* sentinel */ }
 };
 
 /**
@@ -168,7 +269,7 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
 
 	for (i = 0; i < edev->max_supported; i++) {
 		count += sprintf(buf + count, "%s=%d\n",
-				extcon_name[edev->supported_cable[i]],
+				extcon_info[edev->supported_cable[i]].name,
 				 !!(edev->state & (1 << i)));
 	}
 
@@ -193,7 +294,7 @@ static ssize_t cable_name_show(struct device *dev,
 	int i = cable->cable_index;
 
 	return sprintf(buf, "%s\n",
-			extcon_name[cable->edev->supported_cable[i]]);
+			extcon_info[cable->edev->supported_cable[i]].name);
 }
 
 static ssize_t cable_state_show(struct device *dev,
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 667b1d35af12..46d802892c82 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -29,6 +29,15 @@
 #include <linux/device.h>
 
 /*
+ * Define the type of supported external connectors
+ */
+#define EXTCON_TYPE_USB		BIT(0)	/* USB connector */
+#define EXTCON_TYPE_CHG		BIT(1)	/* Charger connector */
+#define EXTCON_TYPE_JACK	BIT(2)	/* Jack connector */
+#define EXTCON_TYPE_DISP	BIT(3)	/* Display connector */
+#define EXTCON_TYPE_MISC	BIT(4)	/* Miscellaneous connector */
+
+/*
  * Define the unique id of supported external connectors
  */
 #define EXTCON_NONE		0