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serial: omap: Support debug UART

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Add debug UART functions to permit omap specific ns16550 to
provide an early debug UART. This is mostly in common with
DEBUG_UART_NS16550 except for Mode definition register which
is required for selecting UART mode(16x auto-baud or 13x mode).

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Lokesh Vutla
2017-04-22 15:57:25 +05:30
committed by Tom Rini
parent 46f51dc9c7
commit a52cf086ac
3 changed files with 54 additions and 11 deletions
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11
include/debug_uart.h
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@ -111,6 +111,17 @@ void printhex8(uint value);
#define _DEBUG_UART_ANNOUNCE
#endif
#define serial_dout(reg, value) \
serial_out_shift((char *)com_port + \
((char *)reg - (char *)com_port) * \
(1 << CONFIG_DEBUG_UART_SHIFT), \
CONFIG_DEBUG_UART_SHIFT, value)
#define serial_din(reg) \
serial_in_shift((char *)com_port + \
((char *)reg - (char *)com_port) * \
(1 << CONFIG_DEBUG_UART_SHIFT), \
CONFIG_DEBUG_UART_SHIFT)
/*
* Now define some functions - this should be inserted into the serial driver
*/