For early debug, the following configs needs to be enabled:
CONFIG_DEBUG_UART=y CONFIG_DEBUG_UART_OMAP=y CONFIG_DEBUG_UART_BASE=0x44e09000 CONFIG_DEBUG_UART_CLOCK=48000000 CONFIG_DEBUG_UART_SHIFT=2 CONFIG_DEBUG_UART_ANNOUNCE=y
Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- - Depends on DEBUG_UART_OMAP support patch[1] - Explicitly did not enable all the above configs by default as early debug is not need on every boot.
arch/arm/mach-omap2/am33xx/board.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/mach-omap2/am33xx/board.c b/arch/arm/mach-omap2/am33xx/board.c index 78dec2b63c..2769f10311 100644 --- a/arch/arm/mach-omap2/am33xx/board.c +++ b/arch/arm/mach-omap2/am33xx/board.c @@ -10,6 +10,7 @@
#include <common.h> #include <dm.h> +#include <debug_uart.h> #include <errno.h> #include <ns16550.h> #include <spl.h> @@ -310,6 +311,9 @@ void early_system_init(void) set_uart_mux_conf(); setup_early_clocks(); uart_soft_reset(); +#ifdef CONFIG_DEBUG_UART_OMAP + debug_uart_init(); +#endif #ifdef CONFIG_TI_I2C_BOARD_DETECT do_board_detect(); #endif