wwan: core: Add WWAN fastboot port type

BugLink: https://bugs.launchpad.net/bugs/2049358

Add a new WWAN port that connects to the device fastboot protocol
interface.

Signed-off-by: Jinjian Song <jinjian.song@fibocom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

(cherry picked from commit e3caf184107a4e2e196528b98b218ddc41e4cb8c)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Timo Aaltonen <tjaalton@ubuntu.com>
Acked-by: Andrei Gherzan <andrei.gherzan@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

drivers/net/wwan/wwan_core.c

@@ -328,6 +328,10 @@ static const struct {
 		.name = "XMMRPC",
 		.devsuf = "xmmrpc",
 	},
+	[WWAN_PORT_FASTBOOT] = {
+		.name = "FASTBOOT",
+		.devsuf = "fastboot",
+	},
 };
 
 static ssize_t type_show(struct device *dev, struct device_attribute *attr,

include/linux/wwan.h

@@ -16,6 +16,7 @@
  * @WWAN_PORT_QCDM: Qcom Modem diagnostic interface
  * @WWAN_PORT_FIREHOSE: XML based command protocol
  * @WWAN_PORT_XMMRPC: Control protocol for Intel XMM modems
+ * @WWAN_PORT_FASTBOOT: Fastboot protocol control
  *
  * @WWAN_PORT_MAX: Highest supported port types
  * @WWAN_PORT_UNKNOWN: Special value to indicate an unknown port type
@@ -28,6 +29,7 @@ enum wwan_port_type {
 	WWAN_PORT_QCDM,
 	WWAN_PORT_FIREHOSE,
 	WWAN_PORT_XMMRPC,
+	WWAN_PORT_FASTBOOT,
 
 	/* Add new port types above this line */