From 0e977bc1455699fd8a9303ee3e8fd66a3c8eaced Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 18 Oct 2015 19:51:24 -0600 Subject: debug_uart: Support board-specific UART initialisation Some boards need to set things up before the debug UART can be used. On these boards a call to debug_uart_init() is insufficient. When this option is enabled, the function board_debug_uart_init() will be called when debug_uart_init() is called. You can put any code here that is needed to set up the UART ready for use, such as set pin multiplexing or enable clocks. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- include/debug_uart.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/debug_uart.h') diff --git a/include/debug_uart.h b/include/debug_uart.h index 257ba004d6..a6b7ce8e6e 100644 --- a/include/debug_uart.h +++ b/include/debug_uart.h @@ -42,6 +42,11 @@ * - Define _debug_uart_putc() as static inline (avoiding stack usage) * - Immediately afterwards, add DEBUG_UART_FUNCS to define the rest of the * functionality (printch(), etc.) + * + * If your board needs additional init for the UART to work, enable + * CONFIG_DEBUG_UART_BOARD_INIT and write a function called + * board_debug_uart_init() to perform that init. When debug_uart_init() is + * called, the init will happen automatically. */ /** @@ -57,6 +62,14 @@ */ void debug_uart_init(void); +#ifdef CONFIG_DEBUG_UART_BOARD_INIT +void board_debug_uart_init(void); +#else +static inline void board_debug_uart_init(void) +{ +} +#endif + /** * printch() - Output a character to the debug UART * @@ -136,6 +149,7 @@ void printhex8(uint value); \ void debug_uart_init(void) \ { \ + board_debug_uart_init(); \ _debug_uart_init(); \ } \ -- cgit v1.2.3