diff options
| -rw-r--r-- | drivers/serial/Kconfig | 11 | ||||
| -rw-r--r-- | include/debug_uart.h | 14 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index ddb725d326..39f65007c9 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -109,6 +109,17 @@ config DEBUG_UART_SHIFT value. Use this value to specify the shift to use, where 0=byte registers, 2=32-bit word registers, etc. +config DEBUG_UART_BOARD_INIT + bool "Enable board-specific debug UART init" + depends on DEBUG_UART + help + 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. + config ROCKCHIP_SERIAL bool "Rockchip on-chip UART support" depends on ARCH_ROCKCHIP && DM_SERIAL 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(); \ } \ |