[U-Boot] [PATCH v2 4/7] Serial: ns16550: Add support for CONFIG_SYS_NS16550_IER macro

[Prafulla Wadaskar]

On some processors this ier register configuration is different
for ex. Marvell Armada100

This patch introduce CONFIG_SYS_NS16550_IER macro support to
unconditionally initialize this register.

Signed-off-by: Prafulla Wadaskar <prafulla at marvell.com>
---
 drivers/serial/ns16550.c |    4 ++--
 include/ns16550.h        |    4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 32f24de..8dcfcb9 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -26,7 +26,7 @@
 
 void NS16550_init (NS16550_t com_port, int baud_divisor)
 {
-	serial_out(0x00, &com_port->ier);
+	serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
 #if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)
 	serial_out(0x7, &com_port->mdr1);	/* mode select reset TL16C750*/
 #endif
@@ -52,7 +52,7 @@ void NS16550_init (NS16550_t com_port, int baud_divisor)
 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
 void NS16550_reinit (NS16550_t com_port, int baud_divisor)
 {
-	serial_out(0x00, &com_port->ier);
+	serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
 	serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
 	serial_out(0, &com_port->dll);
 	serial_out(0, &com_port->dlm);
diff --git a/include/ns16550.h b/include/ns16550.h
index 9ea81e9..e9cb449 100644
--- a/include/ns16550.h
+++ b/include/ns16550.h
@@ -33,6 +33,10 @@
 	unsigned char postpad_##x[-CONFIG_SYS_NS16550_REG_SIZE - 1];
 #endif
 
+#ifndef CONFIG_SYS_NS16550_IER
+#define CONFIG_SYS_NS16550_IER	0x00
+#endif /* CONFIG_SYS_NS16550_IER */
+
 struct NS16550 {
 	UART_REG(rbr);		/* 0 */
 	UART_REG(ier);		/* 1 */
-- 
1.6.0.3