diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index 8258ab3..dfb370e 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -2905,6 +2905,8 @@ struct ccsr_sfp_regs {
 #endif
 #define CONFIG_SYS_FSL_CORENET_SERDES_OFFSET	0xEA000
 #define CONFIG_SYS_FSL_CORENET_SERDES2_OFFSET	0xEB000
+#define CONFIG_SYS_FSL_CORENET_SERDES3_OFFSET	0xEC000
+#define CONFIG_SYS_FSL_CORENET_SERDES4_OFFSET	0xED000
 #define CONFIG_SYS_FSL_CPC_OFFSET		0x10000
 #define CONFIG_SYS_FSL_SCFG_OFFSET		0xFC000
 #define CONFIG_SYS_MPC85xx_DMA1_OFFSET		0x100000
@@ -3090,6 +3092,10 @@ struct ccsr_sfp_regs {
 	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_CORENET_SERDES_OFFSET)
 #define CONFIG_SYS_FSL_CORENET_SERDES2_ADDR \
 	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_CORENET_SERDES2_OFFSET)
+#define CONFIG_SYS_FSL_CORENET_SERDES3_ADDR \
+	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_CORENET_SERDES3_OFFSET)
+#define CONFIG_SYS_FSL_CORENET_SERDES4_ADDR \
+	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_CORENET_SERDES4_OFFSET)
 #define CONFIG_SYS_MPC85xx_USB1_ADDR \
 	(CONFIG_SYS_IMMR + CONFIG_SYS_MPC85xx_USB1_OFFSET)
 #define CONFIG_SYS_MPC85xx_USB2_ADDR \
diff --git a/board/freescale/t4qds/t4240qds.c b/board/freescale/t4qds/t4240qds.c
index c5161c8..6205fea 100644
--- a/board/freescale/t4qds/t4240qds.c
+++ b/board/freescale/t4qds/t4240qds.c
@@ -644,9 +644,10 @@ unsigned long get_board_ddr_clk(void)
 int misc_init_r(void)
 {
 	u8 sw;
-	serdes_corenet_t *srds_regs =
-		(void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
+	void *srds_base = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
+	serdes_corenet_t *srds_regs;
 	u32 actual[MAX_SERDES];
+	u32 pllcr0, expected;
 	unsigned int i;
 
 	sw = QIXIS_READ(brdcfg[2]);
@@ -669,8 +670,9 @@ int misc_init_r(void)
 	}
 
 	for (i = 0; i < MAX_SERDES; i++) {
-		u32 pllcr0 = srds_regs->bank[i].pllcr0;
-		u32 expected = pllcr0 & SRDS_PLLCR0_RFCK_SEL_MASK;
+		srds_regs = srds_base + i * 0x1000;
+		pllcr0 = srds_regs->bank[0].pllcr0;
+		expected = pllcr0 & SRDS_PLLCR0_RFCK_SEL_MASK;
 		if (expected != actual[i]) {
 			printf("Warning: SERDES%u expects reference clock %sMHz, but actual is %sMHz\n",
 			       i + 1, serdes_clock_to_string(expected),