| config DM_SERIAL | |
| bool "Enable Driver Model for serial drivers" | |
| depends on DM | |
| help | |
| Enable driver model for serial. This replaces | |
| drivers/serial/serial.c with the serial uclass, which | |
| implements serial_putc() etc. The uclass interface is | |
| defined in include/serial.h. | |
| config DEBUG_UART | |
| bool "Enable an early debug UART for debugging" | |
| help | |
| The debug UART is intended for use very early in U-Boot to debug | |
| problems when an ICE or other debug mechanism is not available. | |
| To use it you should: | |
| - Make sure your UART supports this interface | |
| - Enable CONFIG_DEBUG_UART | |
| - Enable the CONFIG for your UART to tell it to provide this interface | |
| (e.g. CONFIG_DEBUG_UART_NS16550) | |
| - Define the required settings as needed (see below) | |
| - Call debug_uart_init() before use | |
| - Call debug_uart_putc() to output a character | |
| Depending on your platform it may be possible to use this UART before | |
| a stack is available. | |
| If your UART does not support this interface you can probably add | |
| support quite easily. Remember that you cannot use driver model and | |
| it is preferred to use no stack. | |
| You must not use this UART once driver model is working and the | |
| serial drivers are up and running (done in serial_init()). Otherwise | |
| the drivers may conflict and you will get strange output. | |
| choice | |
| prompt "Select which UART will provide the debug UART" | |
| depends on DEBUG_UART | |
| config DEBUG_UART_NS16550 | |
| bool "ns16550" | |
| help | |
| Select this to enable a debug UART using the ns16550 driver. You | |
| will need to provide parameters to make this work. The driver will | |
| be available until the real driver model serial is running. | |
| endchoice | |
| config DEBUG_UART_BASE | |
| hex "Base address of UART" | |
| depends on DEBUG_UART | |
| help | |
| This is the base address of your UART for memory-mapped UARTs. | |
| A default should be provided by your board, but if not you will need | |
| to use the correct value here. | |
| config DEBUG_UART_CLOCK | |
| int "UART input clock" | |
| depends on DEBUG_UART | |
| help | |
| The UART input clock determines the speed of the internal UART | |
| circuitry. The baud rate is derived from this by dividing the input | |
| clock down. | |
| A default should be provided by your board, but if not you will need | |
| to use the correct value here. | |
| config UNIPHIER_SERIAL | |
| bool "UniPhier on-chip UART support" | |
| depends on ARCH_UNIPHIER && DM_SERIAL | |
| help | |
| Support for the on-chip UARTs on the Panasonic UniPhier platform. |