arm: vita: initial UART console support

arch/arm/boot/dts/vita.dts

@@ -8,6 +8,8 @@
 
 /dts-v1/;
 
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
 / {
 	model = "PlayStation Vita";
 	compatible = "vita,vita";
@@ -16,7 +18,13 @@
 	#size-cells = <1>;
 
 	chosen {
-		bootargs = "keep_bootcon earlyprintk";
+		bootargs = "earlyprintk console=ttyS0";
+
+		stdout-path = "/serial@e2030000:115200";
+	};
+
+	aliases {
+		serial0 = &uart0;
 	};
 
 	cpus {
@@ -53,4 +61,46 @@
 		reg = <0x40200000 0x1FE00000>;
 	};
 
+	gic: interrupt-controller@1a001000 {
+		compatible = "arm,cortex-a9-gic";
+		#interrupt-cells = <3>;
+		#address-cells = <0>;
+		interrupt-controller;
+		reg = <0x1a001000 0x1000>,
+		      <0x1a000100 0x1000>;
+	};
+
+	refclk144mhz: refclk144mkhz {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <144000000>;
+		clock-output-names = "refclk144khz";
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		interrupt-parent = <&gic>;
+		ranges;
+
+		uart0: serial@e2030000 {
+			compatible = "vita,vita-uart";
+			reg = <0xe2030000 0x10000>;
+		};
+
+		/*global_timer@1a000200 {
+			compatible = "arm,cortex-a9-global-timer";
+			reg = <0x1a000200 0x100>;
+			interrupts = <GIC_PPI 11 (GIC_CPU_MASK_RAW(0xF) | IRQ_TYPE_EDGE_RISING)>;
+			clocks = <&refclk144mhz>;
+		};*/
+
+		local_timer@1a000600 {
+			compatible = "arm,cortex-a9-twd-timer";
+			reg = <0x1a000600 0x100>;
+			interrupts = <GIC_PPI 13 (GIC_CPU_MASK_RAW(0xF) | IRQ_TYPE_EDGE_RISING)>;
+			clocks = <&refclk144mhz>;
+		};
+	};
 };

arch/arm/mach-vita/Kconfig

@@ -5,6 +5,9 @@ config ARCH_VITA
 	select CPU_V7
 	select HAVE_SMP
 	select TIMER_OF
+	select HAVE_ARM_ARCH_TIMER
+	select HAVE_ARM_TWD
+	select ARM_GLOBAL_TIMER
 	select COMMON_CLK
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_IRQ_MULTI_HANDLER

drivers/tty/serial/Kconfig

@@ -264,7 +264,7 @@ config SERIAL_SAMSUNG_UARTS
 	help
 	  Select the number of available UART ports for the Samsung S3C
 	  serial driver
-	
+
 config SERIAL_SAMSUNG_DEBUG
 	bool "Samsung SoC serial debug"
 	depends on SERIAL_SAMSUNG && DEBUG_LL
@@ -620,8 +620,8 @@ config PDC_CONSOLE
 	depends on PARISC && !SERIAL_MUX && VT
 	default n
 	help
-	  Saying Y here will enable the software based PDC console to be 
-	  used as the system console.  This is useful for machines in 
+	  Saying Y here will enable the software based PDC console to be
+	  used as the system console.  This is useful for machines in
 	  which the hardware based console has not been written yet.  The
 	  following steps must be completed to use the PDC console:
 
@@ -816,7 +816,7 @@ config SERIAL_CPM
 	depends on CPM2 || CPM1
 	select SERIAL_CORE
 	help
-	  This driver supports the SCC and SMC serial ports on Motorola 
+	  This driver supports the SCC and SMC serial ports on Motorola
 	  embedded PowerPC that contain a CPM1 (8xx) or CPM2 (8xxx)
 
 config SERIAL_CPM_CONSOLE
@@ -1548,6 +1548,19 @@ config SERIAL_RDA_CONSOLE
 	  Say 'Y' here if you wish to use the RDA8810PL UART as the system
 	  console. Only earlycon is implemented currently.
 
+config SERIAL_VITA_UART
+	bool "PlayStation Vita UART support"
+	depends on ARCH_VITA
+	select SERIAL_CORE
+	help
+	  This driver supports the PlayStation Vita UART.
+
+config SERIAL_VITA_UART_CONSOLE
+	bool "PlayStation Vita UART console support"
+	depends on SERIAL_VITA_UART
+	select SERIAL_CORE_CONSOLE
+	select SERIAL_EARLYCON
+
 endmenu
 
 config SERIAL_MCTRL_GPIO

drivers/tty/serial/Makefile

@@ -90,6 +90,7 @@ obj-$(CONFIG_SERIAL_PIC32)	+= pic32_uart.o
 obj-$(CONFIG_SERIAL_MPS2_UART)	+= mps2-uart.o
 obj-$(CONFIG_SERIAL_OWL)	+= owl-uart.o
 obj-$(CONFIG_SERIAL_RDA)	+= rda-uart.o
+obj-$(CONFIG_SERIAL_VITA_UART)	+= vita-uart.o
 
 # GPIOLIB helpers for modem control lines
 obj-$(CONFIG_SERIAL_MCTRL_GPIO)	+= serial_mctrl_gpio.o