ARM: meson: debug: add debug UART for earlyprintk support

Add the UART definitions needed to support earlyprintk for MesonX SoCs
on UARTAO.

Signed-off-by: Carlo Caione <carlo@caione.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 12 insertions, 2 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index eb3913fd07e7..2dc9f6cd3c38 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -356,6 +356,13 @@ choice
                   Say Y here if you want the debug print routines to direct
                   their output to UART1 serial port on KEYSTONE2 devices.
 
+        config DEBUG_MESON_UARTAO
+                bool "Kernel low-level debugging via Meson6 UARTAO"
+                depends on ARCH_MESON
+                help
+                  Say Y here if you want kernel low-lever debugging support
+                  on Amlogic Meson6 based platforms on the UARTAO.
+
         config DEBUG_MMP_UART2
                 bool "Kernel low-level debugging message via MMP UART2"
                 depends on ARCH_MMP
@@ -1027,6 +1034,7 @@ config DEBUG_LL_INCLUDE
         string
         default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250
         default "debug/clps711x.S" if DEBUG_CLPS711X_UART1 || DEBUG_CLPS711X_UART2
+        default "debug/meson.S" if DEBUG_MESON_UARTAO
         default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
         default "debug/exynos.S" if DEBUG_EXYNOS_UART
         default "debug/efm32.S" if DEBUG_LL_UART_EFM32
@@ -1123,6 +1131,7 @@ config DEBUG_UART_PHYS
         default 0xc8000003 if ARCH_IXP4XX && CPU_BIG_ENDIAN
         default 0xd0000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
         default 0xd0012000 if DEBUG_MVEBU_UART
+        default 0xc81004c0 if DEBUG_MESON_UARTAO
         default 0xd4017000 if DEBUG_MMP_UART2
         default 0xd4018000 if DEBUG_MMP_UART3
         default 0xe0000000 if ARCH_SPEAR13XX
@@ -1143,7 +1152,7 @@ config DEBUG_UART_PHYS
         default 0xfffff700 if ARCH_IOP33X
         depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
                 DEBUG_LL_UART_EFM32 || \
-                DEBUG_UART_8250 || DEBUG_UART_PL01X || \
+                DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \
                 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART
 
 config DEBUG_UART_VIRT
@@ -1182,6 +1191,7 @@ config DEBUG_UART_VIRT
         default 0xfd012000 if ARCH_MV78XX0
         default 0xfde12000 if ARCH_DOVE
         default 0xfe012000 if ARCH_ORION5X
+        default 0xf31004c0 if DEBUG_MESON_UARTAO
         default 0xfe017000 if DEBUG_MMP_UART2
         default 0xfe018000 if DEBUG_MMP_UART3
         default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
@@ -1213,7 +1223,7 @@ config DEBUG_UART_VIRT
         default 0xff003000 if DEBUG_U300_UART
         default DEBUG_UART_PHYS if !MMU
         depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \
-                DEBUG_UART_8250 || DEBUG_UART_PL01X || \
+                DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \
                 DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART
 
 config DEBUG_UART_8250_SHIFT