serial: Add UART driver for ADSP-SC5xx SoCs

- Support FIFO mode
- Support earlyprintk
- Support Enable Divide By One support, for higher clock resolutions.

Co-developed-by: Nathan Barrett-Morrison <[email protected]>
Signed-off-by: Nathan Barrett-Morrison <[email protected]>
Co-developed-by: Greg Malysa <[email protected]>
Signed-off-by: Greg Malysa <[email protected]>
Signed-off-by: Arturs Artamonovs <[email protected]>
Signed-off-by: Philip Molloy <[email protected]>

Author: artursartamonovsadi

drivers/tty/serial/Kconfig

@@ -471,6 +471,23 @@ config SERIAL_SA1100_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
+config SERIAL_ADI_UART
+	tristate "ADI uart serial port support"
+	depends on ARCH_SC59X_64 || COMPILE_TEST
+	select SERIAL_CORE
+	select SERIAL_CORE_CONSOLE
+	help
+	  Add support for the built-in adi uart driver.
+
+config SERIAL_ADI_UART_CONSOLE
+	bool "Console on ADI uart serial port"
+	depends on SERIAL_ADI_UART
+	default y
+	select SERIAL_CORE_CONSOLE
+	help
+	  If you have enabled the ADI UART serial port, you can
+	  make it the console by answering Y to this option.
+
 config SERIAL_IMX
 	tristate "IMX serial port support"
 	depends on ARCH_MXC || COMPILE_TEST

drivers/tty/serial/Makefile

@@ -49,6 +49,7 @@ obj-$(CONFIG_SERIAL_JSM)		+= jsm/
 obj-$(CONFIG_SERIAL_LANTIQ)		+= lantiq.o
 obj-$(CONFIG_SERIAL_LITEUART)		+= liteuart.o
 obj-$(CONFIG_SERIAL_HS_LPC32XX)		+= lpc32xx_hs.o
+obj-$(CONFIG_SERIAL_ADI_UART)		+= adi_uart.o
 obj-$(CONFIG_SERIAL_MAX3100)		+= max3100.o
 obj-$(CONFIG_SERIAL_MAX310X)		+= max310x.o
 obj-$(CONFIG_SERIAL_MCF)		+= mcf.o