diff --git a/board/toradex/apalis_imx6/pf0100.c b/board/toradex/apalis_imx6/pf0100.c
index 5eaf9c0b17..013801e62b 100644
--- a/board/toradex/apalis_imx6/pf0100.c
+++ b/board/toradex/apalis_imx6/pf0100.c
@@ -10,6 +10,7 @@
 
 #include <common.h>
 #include <i2c.h>
+#include <linux/compiler.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/mx6-pins.h>
@@ -23,7 +24,7 @@
 /*#define DEBUG */
 
 /* use Apalis GPIO1 to switch on VPGM, ON: 1 */
-static iomux_v3_cfg_t const pmic_prog_pads[] = {
+static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
 	MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
 #	define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
 };
@@ -161,7 +162,8 @@ unsigned pmic_init(void)
 	return programmed;
 }
 
-int pf0100_prog(void)
+#ifndef CONFIG_SPL_BUILD
+static int pf0100_prog(void)
 {
 	unsigned char bus = 1;
 	unsigned char val;
@@ -208,7 +210,7 @@ int pf0100_prog(void)
 	return CMD_RET_SUCCESS;
 }
 
-int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
+static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
 		char * const argv[])
 {
 	int ret;
@@ -226,3 +228,4 @@ U_BOOT_CMD(
 	"Program the OTP fuses on the PMIC PF0100",
 	""
 );
+#endif
diff --git a/board/toradex/apalis_imx6/pf0100.h b/board/toradex/apalis_imx6/pf0100.h
index c84cab8b15..af1e88fbc9 100644
--- a/board/toradex/apalis_imx6/pf0100.h
+++ b/board/toradex/apalis_imx6/pf0100.h
@@ -50,7 +50,4 @@
 /* i.e. 0: unprogrammed, 3: programmed, other: undefined prog. state */
 unsigned pmic_init(void);
 
-/* programmes OTP fuses to values required on a Toradex Apalis iMX6 */
-int pf0100_prog(void);
-
 #endif /* PF0100_H_ */
diff --git a/board/toradex/colibri_imx6/pf0100.c b/board/toradex/colibri_imx6/pf0100.c
index 6889287760..62e64ab1d7 100644
--- a/board/toradex/colibri_imx6/pf0100.c
+++ b/board/toradex/colibri_imx6/pf0100.c
@@ -23,7 +23,7 @@
 /*#define DEBUG */
 
 /* use GPIO: EXT_IO1 to switch on VPGM, ON: 1 */
-static iomux_v3_cfg_t const pmic_prog_pads[] = {
+static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
 	MX6_PAD_NANDF_D3__GPIO2_IO03 | MUX_PAD_CTRL(NO_PAD_CTRL),
 #	define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 3)
 };
@@ -144,7 +144,8 @@ unsigned pmic_init(void)
 	return programmed;
 }
 
-int pf0100_prog(void)
+#ifndef CONFIG_SPL_BUILD
+static int pf0100_prog(void)
 {
 	unsigned char bus = 1;
 	unsigned char val;
@@ -191,7 +192,7 @@ int pf0100_prog(void)
 	return CMD_RET_SUCCESS;
 }
 
-int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
+static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
 		char * const argv[])
 {
 	int ret;
@@ -209,3 +210,4 @@ U_BOOT_CMD(
 	"Program the OTP fuses on the PMIC PF0100",
 	""
 );
+#endif
diff --git a/board/toradex/colibri_imx6/pf0100.h b/board/toradex/colibri_imx6/pf0100.h
index c84cab8b15..af1e88fbc9 100644
--- a/board/toradex/colibri_imx6/pf0100.h
+++ b/board/toradex/colibri_imx6/pf0100.h
@@ -50,7 +50,4 @@
 /* i.e. 0: unprogrammed, 3: programmed, other: undefined prog. state */
 unsigned pmic_init(void);
 
-/* programmes OTP fuses to values required on a Toradex Apalis iMX6 */
-int pf0100_prog(void);
-
 #endif /* PF0100_H_ */