ARM: sti: Add DEBUG_LL console support

This patch adds low level debug uart support to sti based SOCs.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
CC: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 35 insertions, 0 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 1d41908d5cda..311f6f365173 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -483,6 +483,16 @@ choice
                   This option selects UART0 on VIA/Wondermedia System-on-a-chip
                   devices, including VT8500, WM8505, WM8650 and WM8850.
 
+        config DEBUG_STI_UART
+                depends on ARCH_STI
+                bool "Use StiH415/416 ASC for low-level debug"
+                help
+                  Say Y here if you want kernel low-level debugging support
+                  on StiH415/416 based platforms like B2000, B2020.
+                  It support UART2 and SBC_UART1.
+
+                  If unsure, say N.
+
         config DEBUG_LL_UART_NONE
                 bool "No low-level debugging UART"
                 depends on !ARCH_MULTIPLATFORM
@@ -617,6 +627,30 @@ choice
 
 endchoice
 
+choice
+        prompt "Low-level debug console UART"
+        depends on DEBUG_LL && DEBUG_STI_UART
+
+        config STIH41X_DEBUG_ASC2
+                bool "ASC2 UART"
+                help
+                  Say Y here if you want kernel low-level debugging support
+                  on STiH415/416 based platforms like b2000, which has
+                  default UART wired up to ASC2.
+
+                  If unsure, say N.
+
+        config STIH41X_DEBUG_SBC_ASC1
+                bool "SBC ASC1 UART"
+                help
+                  Say Y here if you want kernel low-level debugging support
+                  on STiH415/416 based platforms like b2020. which has
+                  default UART wired up to SBC ASC1.
+
+                  If unsure, say N.
+
+endchoice
+
 config DEBUG_LL_INCLUDE
         string
         default "debug/bcm2835.S" if DEBUG_BCM2835
@@ -641,6 +675,7 @@ config DEBUG_LL_INCLUDE
                                  DEBUG_MMP_UART3
         default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
         default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
+        default "debug/sti.S" if DEBUG_STI_UART
         default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
         default "debug/tegra.S" if DEBUG_TEGRA_UART
         default "debug/ux500.S" if DEBUG_UX500_UART