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authorSimon Glass <sjg@chromium.org>2015-10-18 19:51:24 -0600
committerSimon Glass <sjg@chromium.org>2015-10-21 07:46:50 -0600
commit0e977bc1455699fd8a9303ee3e8fd66a3c8eaced (patch)
tree858bf46693800745dbc70f7916a8e3eb43acd18c /include/debug_uart.h
parent97b059730218824a1455f030aadd78ef51729ec0 (diff)
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 <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/debug_uart.h')
-rw-r--r--include/debug_uart.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/debug_uart.h b/include/debug_uart.h
index 257ba004d6e..a6b7ce8e6ee 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(); \
} \