sparc64: vcc: Enable VCC module in linux

Enables the Virtual Console Concentrator (VCC) module
in linux kernel

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -12294,6 +12294,7 @@ F:	drivers/tty/serial/sunsab.h
 F:	drivers/tty/serial/sunsu.c
 F:	drivers/tty/serial/sunzilog.c
 F:	drivers/tty/serial/sunzilog.h
+F:	drivers/tty/vcc.c
 
 SPARSE CHECKER
 M:	"Christopher Li" <sparse@chrisli.org>

arch/sparc/configs/sparc64_defconfig

@@ -238,3 +238,4 @@ CONFIG_CRYPTO_TWOFISH=m
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 CONFIG_CRC16=m
 CONFIG_LIBCRC32C=m
+CONFIG_VCC=m

drivers/tty/Kconfig

@@ -455,4 +455,9 @@ config MIPS_EJTAG_FDC_KGDB_CHAN
 	help
 	  FDC channel number to use for KGDB.
 
+config VCC
+	tristate "Sun Virtual Console Concentrator"
+	depends on SUN_LDOMS
+	help
+	  Support for Sun logical domain consoles.
 endif # TTY

drivers/tty/Makefile

@@ -33,5 +33,6 @@ obj-$(CONFIG_PPC_EPAPR_HV_BYTECHAN) += ehv_bytechan.o
 obj-$(CONFIG_GOLDFISH_TTY)	+= goldfish.o
 obj-$(CONFIG_DA_TTY)		+= metag_da.o
 obj-$(CONFIG_MIPS_EJTAG_FDC_TTY) += mips_ejtag_fdc.o
+obj-$(CONFIG_VCC)		+= vcc.o
 
 obj-y += ipwireless/

drivers/tty/vcc.c

@@ -0,0 +1,18 @@
+/* vcc.c: sun4v virtual channel concentrator
+ *
+ * Copyright (C) 2017 Oracle. All rights reserved.
+ */
+
+#include <linux/module.h>
+
+static int __init vcc_init(void)
+{
+	return 0;
+}
+
+static void __exit vcc_exit(void)
+{
+}
+
+module_init(vcc_init);
+module_exit(vcc_exit);