tty/serial: Add Spreadtrum sc9836-uart driver support

Add a full sc9836-uart driver for SC9836 SoC which is based on the
spreadtrum sharkl64 platform.
This driver also support earlycon.

Originally-by: Lanqing Liu <lanqing.liu@spreadtrum.com>
Signed-off-by: Orson Zhai <orson.zhai@spreadtrum.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index c63317e87c33..ddcc0a4c659c 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1583,6 +1583,24 @@ config SERIAL_MEN_Z135
           This driver can also be build as a module. If so, the module will be called
           men_z135_uart.ko
 
+config SERIAL_SPRD
+        tristate "Support for Spreadtrum serial"
+        depends on ARCH_SPRD
+        select SERIAL_CORE
+        help
+          This enables the driver for the Spreadtrum's serial.
+
+config SERIAL_SPRD_CONSOLE
+        bool "Spreadtrum UART console support"
+        depends on SERIAL_SPRD=y
+        select SERIAL_CORE_CONSOLE
+        select SERIAL_EARLYCON
+        help
+          Support for early debug console using Spreadtrum's serial. This enables
+          the console before standard serial driver is probed. This is enabled
+          with "earlycon" on the kernel command line. The console is
+          enabled when early_param is processed.
+
 endmenu
 
 config SERIAL_MCTRL_GPIO