ARM: tegra: simplify DEBUG_LL UART selection options

Delete CONFIG_TEGRA_DEBUG_UART_AUTO_SCRATCH; it's not useful any more:
* No upstream bootloader currently or will ever support this option.
* CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA is a much more direct alternative.

Merge the fixed and automatic UART selection menus into a single choice
for simplicity; now you either pick AUTO_ODMDATA or a single fixed UART,
rather than potentially having an AUTO option override whatever fixed
option was chosen.

Remove TEGRA_DEBUG_UART_NONE; if you don't want a Tegra DEBUG_LL UART,
simply don't turn on DEBUG_LL. NONE used to be the default option, so
pick AUTO_ODMDATA as the new default.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 9 insertions, 31 deletions

diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 9ff6f6ea3617..97fcd16e2dab 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -58,11 +58,16 @@ config TEGRA_AHB
           perfomance parameters(priority, prefech size).
 
 choice
-        prompt "Default low-level debug console UART"
-        default TEGRA_DEBUG_UART_NONE
+        prompt "Low-level debug console UART"
 
-config TEGRA_DEBUG_UART_NONE
-        bool "None"
+config TEGRA_DEBUG_UART_AUTO_ODMDATA
+        bool "Via ODMDATA"
+        help
+          Automatically determines which UART to use for low-level debug based
+          on the ODMDATA value. This value is part of the BCT, and is written
+          to the boot memory device using nvflash, or other flashing tool.
+          When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
+          0/1/2/3/4 are UART A/B/C/D/E.
 
 config TEGRA_DEBUG_UARTA
         bool "UART-A"
@@ -81,33 +86,6 @@ config TEGRA_DEBUG_UARTE
 
 endchoice
 
-choice
-        prompt "Automatic low-level debug console UART"
-        default TEGRA_DEBUG_UART_AUTO_NONE
-
-config TEGRA_DEBUG_UART_AUTO_NONE
-        bool "None"
-
-config TEGRA_DEBUG_UART_AUTO_ODMDATA
-        bool "Via ODMDATA"
-        help
-          Automatically determines which UART to use for low-level debug based
-          on the ODMDATA value. This value is part of the BCT, and is written
-          to the boot memory device using nvflash, or other flashing tool.
-          When bits 19:18 are 3, then bits 17:15 indicate which UART to use;
-          0/1/2/3/4 are UART A/B/C/D/E.
-
-config TEGRA_DEBUG_UART_AUTO_SCRATCH
-        bool "Via UART scratch register"
-        help
-          Automatically determines which UART to use for low-level debug based
-          on the UART scratch register value. Some bootloaders put ASCII 'D'
-          in this register when they initialize their own console UART output.
-          Using this option allows the kernel to automatically pick the same
-          UART.
-
-endchoice
-
 config TEGRA_EMC_SCALING_ENABLE
         bool "Enable scaling the memory frequency"