Fixed the init sequence in debug_uart_init() to match the one in
NS16550_init(). Without this I was unable to get debug UART working on
AM335x. Based on a patch by Vasili Galka.
Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>
---
drivers/serial/ns16550.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 6e9b946..40fe246 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -262,6 +262,11 @@ static inline void _debug_uart_init(void)
baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
CONFIG_BAUDRATE);
serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
+#if defined(CONFIG_OMAP) || defined(CONFIG_AM33XX) || \
+ defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
+ serial_dout(&com_port->mdr1, 0x7); /* mode select reset TL16C750*/
+#endif
+
serial_dout(&com_port->mcr, UART_MCRVAL);
serial_dout(&com_port->fcr, UART_FCRVAL);
@@ -269,6 +274,14 @@ static inline void _debug_uart_init(void)
serial_dout(&com_port->dll, baud_divisor & 0xff);
serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
serial_dout(&com_port->lcr, UART_LCRVAL);
+
+#if defined(CONFIG_OMAP) || \
+ defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \
+ defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
+
+ /* /16 is proper to hit 115200 with 48MHz */
+ serial_dout(&com_port->mdr1, 0);
+#endif /* CONFIG_OMAP */
}
static inline void _debug_uart_putc(int ch)
--
2.10.2
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