ARM: debug: add UART early console support for MSTAR SoCs

This adds the debug_ll uart for the PM UART found on armv7-based MStar
SoCs.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Acked-by: Daniel Palmer <daniel@thingy.jp>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Mohammed Billoo <mohammed.billoo@gmail.com>
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 3601649..1c67376 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -607,6 +607,14 @@ choice
                  when u-boot hands over to the kernel, the system
                  silently crashes, with no serial output at all.
 
+       config DEBUG_MSTARV7_PMUART
+               bool "Kernel low-level debugging messages via MSTARV7 PM UART"
+               depends on ARCH_MSTARV7
+               select DEBUG_UART_8250
+               help
+                 Say Y here if you want kernel low-level debugging support
+                 for MSTAR ARMv7-based platforms on PM UART.
+
        config DEBUG_MT6589_UART0
                bool "Mediatek mt6589 UART0"
                depends on ARCH_MEDIATEK
@@ -1605,6 +1613,7 @@ config DEBUG_UART_PHYS
        default 0x18000400 if DEBUG_BCM_HR2
        default 0x18023000 if DEBUG_BCM_IPROC_UART3
        default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
+       default 0x1f221000 if DEBUG_MSTARV7_PMUART
        default 0x20001000 if DEBUG_HIP01_UART
        default 0x20060000 if DEBUG_RK29_UART0
        default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
@@ -1722,6 +1731,7 @@ config DEBUG_UART_VIRT
        default 0xf0100000 if DEBUG_DIGICOLOR_UA0
        default 0xf01fb000 if DEBUG_NOMADIK_UART
        default 0xf0201000 if DEBUG_BCM2835 || DEBUG_BCM2836
+       default 0xf0221000 if DEBUG_MSTARV7_PMUART
        default 0xf1000300 if DEBUG_BCM_5301X
        default 0xf1000400 if DEBUG_BCM_HR2
        default 0xf1002000 if DEBUG_MT8127_UART0
@@ -1827,6 +1837,7 @@ config DEBUG_UART_8250_SHIFT
        default 0 if DEBUG_FOOTBRIDGE_COM1 || ARCH_IOP32X || DEBUG_BCM_5301X || \
                DEBUG_BCM_HR2 || DEBUG_OMAP7XXUART1 || DEBUG_OMAP7XXUART2 || \
                DEBUG_OMAP7XXUART3
+       default 3 if DEBUG_MSTARV7_PMUART
        default 2
 
 config DEBUG_UART_8250_WORD