diff --git a/arch/powerpc/cpu/mpc5xxx/serial.c b/arch/powerpc/cpu/mpc5xxx/serial.c
index 59a877a..0127065 100644
--- a/arch/powerpc/cpu/mpc5xxx/serial.c
+++ b/arch/powerpc/cpu/mpc5xxx/serial.c
@@ -340,6 +340,7 @@
 	"serial0",
 	"UART0",
 	serial0_init,
+	NULL,
 	serial0_setbrg,
 	serial0_getc,
 	serial0_tstc,
@@ -352,6 +353,7 @@
 	"serial1",
 	"UART1",
 	serial1_init,
+	NULL,
 	serial1_setbrg,
 	serial1_getc,
 	serial1_tstc,
diff --git a/arch/powerpc/cpu/mpc8xx/serial.c b/arch/powerpc/cpu/mpc8xx/serial.c
index 664db65..9514c66 100644
--- a/arch/powerpc/cpu/mpc8xx/serial.c
+++ b/arch/powerpc/cpu/mpc8xx/serial.c
@@ -392,6 +392,7 @@
 	"serial_smc",
 	"SMC",
 	smc_init,
+	NULL,
 	smc_setbrg,
 	smc_getc,
 	smc_tstc,
@@ -662,6 +663,7 @@
 	"serial_scc",
 	"SCC",
 	scc_init,
+	NULL,
 	scc_setbrg,
 	scc_getc,
 	scc_tstc,
diff --git a/arch/powerpc/cpu/ppc4xx/4xx_uart.c b/arch/powerpc/cpu/ppc4xx/4xx_uart.c
index 8de6542..e6ab570 100644
--- a/arch/powerpc/cpu/ppc4xx/4xx_uart.c
+++ b/arch/powerpc/cpu/ppc4xx/4xx_uart.c
@@ -822,6 +822,7 @@
 	"serial0",
 	"UART0",
 	serial0_init,
+	NULL,
 	serial0_setbrg,
 	serial0_getc,
 	serial0_tstc,
@@ -834,6 +835,7 @@
 	"serial1",
 	"UART1",
 	serial1_init,
+	NULL,
 	serial1_setbrg,
 	serial1_getc,
 	serial1_tstc,
diff --git a/board/logicpd/zoom2/zoom2_serial.h b/board/logicpd/zoom2/zoom2_serial.h
index c98158f..a6d2427 100644
--- a/board/logicpd/zoom2/zoom2_serial.h
+++ b/board/logicpd/zoom2/zoom2_serial.h
@@ -65,6 +65,7 @@
 	N(n),					\
 	U(n),					\
 	quad_init_##n,				\
+	NULL,					\
 	quad_setbrg_##n,			\
 	quad_getc_##n,				\
 	quad_tstc_##n,				\
diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c
index dd5f332..8eda95cd 100644
--- a/drivers/serial/serial.c
+++ b/drivers/serial/serial.c
@@ -115,6 +115,7 @@
 	name,\
 	bus,\
 	eserial##port##_init,\
+	NULL,\
 	eserial##port##_setbrg,\
 	eserial##port##_getc,\
 	eserial##port##_tstc,\
diff --git a/drivers/serial/serial_pxa.c b/drivers/serial/serial_pxa.c
index 9ba457e..b74e439 100644
--- a/drivers/serial/serial_pxa.c
+++ b/drivers/serial/serial_pxa.c
@@ -266,6 +266,7 @@
 	"serial_ffuart",
 	"PXA",
 	ffuart_init,
+	NULL,
 	ffuart_setbrg,
 	ffuart_getc,
 	ffuart_tstc,
@@ -310,6 +311,7 @@
 	"serial_btuart",
 	"PXA",
 	btuart_init,
+	NULL,
 	btuart_setbrg,
 	btuart_getc,
 	btuart_tstc,
@@ -354,6 +356,7 @@
 	"serial_stuart",
 	"PXA",
 	stuart_init,
+	NULL,
 	stuart_setbrg,
 	stuart_getc,
 	stuart_tstc,
diff --git a/drivers/serial/serial_s3c24x0.c b/drivers/serial/serial_s3c24x0.c
index 5dd4dd8..8a3e302 100644
--- a/drivers/serial/serial_s3c24x0.c
+++ b/drivers/serial/serial_s3c24x0.c
@@ -78,6 +78,7 @@
 	name, \
 	bus, \
 	s3serial##port##_init, \
+	NULL,\
 	s3serial##port##_setbrg, \
 	s3serial##port##_getc, \
 	s3serial##port##_tstc, \
diff --git a/drivers/serial/serial_s5pc1xx.c b/drivers/serial/serial_s5pc1xx.c
index 73669a9..8da0c86 100644
--- a/drivers/serial/serial_s5pc1xx.c
+++ b/drivers/serial/serial_s5pc1xx.c
@@ -185,6 +185,7 @@
 	name, \
 	bus, \
 	s5p_serial##port##_init, \
+	NULL, \
 	s5p_serial##port##_setbrg, \
 	s5p_serial##port##_getc, \
 	s5p_serial##port##_tstc, \
diff --git a/include/serial.h b/include/serial.h
index f2638ec..fbf101b 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -9,6 +9,7 @@
 	char ctlr[CTLRSIZE];
 
 	int  (*init) (void);
+	int  (*uninit) (void);
 	void (*setbrg) (void);
 	int (*getc) (void);
 	int (*tstc) (void);