tegra2: Plumb in SPI/UART switch code
On Seaboard the UART and SPI interfere with each other. This causes the UART
to receive spurious zero bytes after SPI transactions and also means that
SPI can corrupt a few output characters when it starts up if they are still
in the UART buffer.
This updates the board to use the SPI/UART switch to avoid the problem.
For now this feature is turned off since it needs changes to the NS16550
UART to operate.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c
index 7f2827b..0b779f6 100644
--- a/board/nvidia/seaboard/seaboard.c
+++ b/board/nvidia/seaboard/seaboard.c
@@ -31,6 +31,8 @@
#endif
#include "../common/board.h"
+/* TODO: Remove this code when the SPI switch is working */
+#ifndef CONFIG_SPI_UART_SWITCH
/*
* Routine: gpio_config_uart_seaboard
* Description: Force GPIO_PI3 low on Seaboard so UART4 works.
@@ -48,6 +50,7 @@
return;
gpio_config_uart_seaboard();
}
+#endif
#ifdef CONFIG_TEGRA2_MMC
/*