diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c
index 3151d75..a366a6b 100644
--- a/arch/arm/mach-omap2/voltage.c
+++ b/arch/arm/mach-omap2/voltage.c
@@ -426,23 +426,21 @@ static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
 		unsigned long target_volt)
 {
 	u32 vpconfig;
-	u8 target_vsel, current_vsel, prm_irqst_reg;
+	u8 target_vsel, current_vsel;
 	int ret, timeout = 0;
 
 	ret = _pre_volt_scale(vdd, target_volt, &target_vsel, &current_vsel);
 	if (ret)
 		return ret;
 
-	prm_irqst_reg = vdd->vp_data->prm_irqst_data->prm_irqst_reg;
-
 	/*
 	 * Clear all pending TransactionDone interrupt/status. Typical latency
 	 * is <3us
 	 */
 	while (timeout++ < VP_TRANXDONE_TIMEOUT) {
 		vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status,
-			       vdd->prm_irqst_mod, prm_irqst_reg);
-		if (!(vdd->read_reg(vdd->prm_irqst_mod, prm_irqst_reg) &
+			       vdd->prm_irqst_mod, vdd->prm_irqst_reg);
+		if (!(vdd->read_reg(vdd->prm_irqst_mod, vdd->prm_irqst_reg) &
 		      vdd->vp_data->prm_irqst_data->tranxdone_status))
 			break;
 		udelay(1);
@@ -475,7 +473,8 @@ static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
 	 * Depends on SMPSWAITTIMEMIN/MAX and voltage change
 	 */
 	timeout = 0;
-	omap_test_timeout((vdd->read_reg(vdd->prm_irqst_mod, prm_irqst_reg) &
+	omap_test_timeout((vdd->read_reg(vdd->prm_irqst_mod,
+					 vdd->prm_irqst_reg) &
 			   vdd->vp_data->prm_irqst_data->tranxdone_status),
 			  VP_TRANXDONE_TIMEOUT, timeout);
 	if (timeout >= VP_TRANXDONE_TIMEOUT)
@@ -492,8 +491,8 @@ static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
 	timeout = 0;
 	while (timeout++ < VP_TRANXDONE_TIMEOUT) {
 		vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status,
-			       vdd->prm_irqst_mod, prm_irqst_reg);
-		if (!(vdd->read_reg(vdd->prm_irqst_mod, prm_irqst_reg) &
+			       vdd->prm_irqst_mod, vdd->prm_irqst_reg);
+		if (!(vdd->read_reg(vdd->prm_irqst_mod, vdd->prm_irqst_reg) &
 		      vdd->vp_data->prm_irqst_data->tranxdone_status))
 			break;
 		udelay(1);
diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
index ffdc55e..db23d49 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -136,6 +136,7 @@ struct omap_vdd_info {
 	bool vp_enabled;
 
 	s16 prm_irqst_mod;
+	u8 prm_irqst_reg;
 	u32 (*read_reg) (u16 mod, u8 offset);
 	void (*write_reg) (u32 val, u16 mod, u8 offset);
 	int (*volt_scale) (struct omap_vdd_info *vdd,
diff --git a/arch/arm/mach-omap2/voltagedomains3xxx_data.c b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
index 0d30b7f..f831f9a 100644
--- a/arch/arm/mach-omap2/voltagedomains3xxx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
@@ -39,6 +39,7 @@ static const struct omap_vfsm_instance_data omap3_vdd1_vfsm_data = {
 
 static struct omap_vdd_info omap3_vdd1_info = {
 	.prm_irqst_mod = OCP_MOD,
+	.prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
 	.vp_data = &omap3_vp1_data,
 	.vc_data = &omap3_vc1_data,
 	.vfsm = &omap3_vdd1_vfsm_data,
@@ -55,6 +56,7 @@ static const struct omap_vfsm_instance_data omap3_vdd2_vfsm_data = {
 
 static struct omap_vdd_info omap3_vdd2_info = {
 	.prm_irqst_mod = OCP_MOD,
+	.prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
 	.vp_data = &omap3_vp2_data,
 	.vc_data = &omap3_vc2_data,
 	.vfsm = &omap3_vdd2_vfsm_data,
diff --git a/arch/arm/mach-omap2/voltagedomains44xx_data.c b/arch/arm/mach-omap2/voltagedomains44xx_data.c
index 1c2d7d7..64dc265 100644
--- a/arch/arm/mach-omap2/voltagedomains44xx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains44xx_data.c
@@ -38,6 +38,7 @@ static const struct omap_vfsm_instance_data omap4_vdd_mpu_vfsm_data = {
 
 static struct omap_vdd_info omap4_vdd_mpu_info = {
 	.prm_irqst_mod = OMAP4430_PRM_OCP_SOCKET_INST,
+	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
 	.vp_data = &omap4_vp_mpu_data,
 	.vc_data = &omap4_vc_mpu_data,
 	.vfsm = &omap4_vdd_mpu_vfsm_data,
@@ -52,6 +53,7 @@ static const struct omap_vfsm_instance_data omap4_vdd_iva_vfsm_data = {
 
 static struct omap_vdd_info omap4_vdd_iva_info = {
 	.prm_irqst_mod = OMAP4430_PRM_OCP_SOCKET_INST,
+	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.vp_data = &omap4_vp_iva_data,
 	.vc_data = &omap4_vc_iva_data,
 	.vfsm = &omap4_vdd_iva_vfsm_data,
@@ -66,6 +68,7 @@ static const struct omap_vfsm_instance_data omap4_vdd_core_vfsm_data = {
 
 static struct omap_vdd_info omap4_vdd_core_info = {
 	.prm_irqst_mod = OMAP4430_PRM_OCP_SOCKET_INST,
+	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.vp_data = &omap4_vp_core_data,
 	.vc_data = &omap4_vc_core_data,
 	.vfsm = &omap4_vdd_core_vfsm_data,
diff --git a/arch/arm/mach-omap2/vp.h b/arch/arm/mach-omap2/vp.h
index d277da6..5406b08 100644
--- a/arch/arm/mach-omap2/vp.h
+++ b/arch/arm/mach-omap2/vp.h
@@ -70,16 +70,13 @@ struct omap_vp_common_data {
 
 /**
  * struct omap_vp_prm_irqst_data - PRM_IRQSTATUS_MPU.VP_TRANXDONE_ST data
- * @prm_irqst_reg: reg offset for PRM_IRQSTATUS_MPU from top of PRM
  * @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg
  *
- * XXX prm_irqst_reg does not belong here
  * XXX Note that on OMAP3, VP_TRANXDONE interrupt may not work due to a
  *     hardware bug
  * XXX This structure is probably not needed
  */
 struct omap_vp_prm_irqst_data {
-	u8 prm_irqst_reg;
 	u32 tranxdone_status;
 };
 
diff --git a/arch/arm/mach-omap2/vp3xxx_data.c b/arch/arm/mach-omap2/vp3xxx_data.c
index c9b3e64..a8ea045 100644
--- a/arch/arm/mach-omap2/vp3xxx_data.c
+++ b/arch/arm/mach-omap2/vp3xxx_data.c
@@ -51,7 +51,6 @@ static const struct omap_vp_common_data omap3_vp_common = {
 };
 
 static const struct omap_vp_prm_irqst_data omap3_vp1_prm_irqst_data = {
-	.prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
 	.tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK,
 };
 
@@ -67,7 +66,6 @@ struct omap_vp_instance_data omap3_vp1_data = {
 };
 
 static const struct omap_vp_prm_irqst_data omap3_vp2_prm_irqst_data = {
-	.prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
 	.tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK,
 };
 
diff --git a/arch/arm/mach-omap2/vp44xx_data.c b/arch/arm/mach-omap2/vp44xx_data.c
index 1a0842e..0957c24 100644
--- a/arch/arm/mach-omap2/vp44xx_data.c
+++ b/arch/arm/mach-omap2/vp44xx_data.c
@@ -52,7 +52,6 @@ static const struct omap_vp_common_data omap4_vp_common = {
 };
 
 static const struct omap_vp_prm_irqst_data omap4_vp_mpu_prm_irqst_data = {
-	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
 	.tranxdone_status = OMAP4430_VP_MPU_TRANXDONE_ST_MASK,
 };
 
@@ -68,7 +67,6 @@ struct omap_vp_instance_data omap4_vp_mpu_data = {
 };
 
 static const struct omap_vp_prm_irqst_data omap4_vp_iva_prm_irqst_data = {
-	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.tranxdone_status = OMAP4430_VP_IVA_TRANXDONE_ST_MASK,
 };
 
@@ -84,7 +82,6 @@ struct omap_vp_instance_data omap4_vp_iva_data = {
 };
 
 static const struct omap_vp_prm_irqst_data omap4_vp_core_prm_irqst_data = {
-	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.tranxdone_status = OMAP4430_VP_CORE_TRANXDONE_ST_MASK,
 };
 
