OMAP2+: voltage: move PRCM mod offets into VC/VP structures

Eliminate need for global variables for the various PRM module offsets by
making them part of the VP/VC common structures

Eventually, these will likely be moved again, or more likely removed
when VP/VC code is isolated, but for now just getting rid of them as
global variabes so that the voltage domain initialization can be
cleaned up.

Signed-off-by: Kevin Hilman <khilman@ti.com>

10 files changed, 70 insertions, 70 deletions

diff --git a/arch/arm/mach-omap2/vc.h b/arch/arm/mach-omap2/vc.h
index e7767771de49..f7338af13d0b 100644
--- a/arch/arm/mach-omap2/vc.h
+++ b/arch/arm/mach-omap2/vc.h
@@ -23,6 +23,7 @@
  * struct omap_vc_common_data - per-VC register/bitfield data
  * @cmd_on_mask: ON bitmask in PRM_VC_CMD_VAL* register
  * @valid: VALID bitmask in PRM_VC_BYPASS_VAL register
+ * @prm_mod: PRM module id used for PRM register access
  * @smps_sa_reg: Offset of PRM_VC_SMPS_SA reg from PRM start
  * @smps_volra_reg: Offset of PRM_VC_SMPS_VOL_RA reg from PRM start
  * @bypass_val_reg: Offset of PRM_VC_BYPASS_VAL reg from PRM start
@@ -40,6 +41,7 @@
 struct omap_vc_common_data {
         u32 cmd_on_mask;
         u32 valid;
+        s16 prm_mod;
         u8 smps_sa_reg;
         u8 smps_volra_reg;
         u8 bypass_val_reg;
diff --git a/arch/arm/mach-omap2/vc3xxx_data.c b/arch/arm/mach-omap2/vc3xxx_data.c
index f37dc4bc379a..55caccb2908d 100644
--- a/arch/arm/mach-omap2/vc3xxx_data.c
+++ b/arch/arm/mach-omap2/vc3xxx_data.c
@@ -30,6 +30,7 @@
  * XXX This stuff presumably belongs in the vc3xxx.c or vc.c file.
  */
 static struct omap_vc_common_data omap3_vc_common = {
+        .prm_mod         = OMAP3430_GR_MOD,
         .smps_sa_reg     = OMAP3_PRM_VC_SMPS_SA_OFFSET,
         .smps_volra_reg  = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET,
         .bypass_val_reg  = OMAP3_PRM_VC_BYPASS_VAL_OFFSET,
diff --git a/arch/arm/mach-omap2/vc44xx_data.c b/arch/arm/mach-omap2/vc44xx_data.c
index a98da8ddec52..b62678e12a3c 100644
--- a/arch/arm/mach-omap2/vc44xx_data.c
+++ b/arch/arm/mach-omap2/vc44xx_data.c
@@ -31,6 +31,7 @@
  * XXX This stuff presumably belongs in the vc3xxx.c or vc.c file.
  */
 static const struct omap_vc_common_data omap4_vc_common = {
+        .prm_mod = OMAP4430_PRM_DEVICE_INST,
         .smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET,
         .smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET,
         .bypass_val_reg = OMAP4_PRM_VC_VAL_BYPASS_OFFSET,
diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c
index 9ef3789ded4b..3151d7525f89 100644
--- a/arch/arm/mach-omap2/voltage.c
+++ b/arch/arm/mach-omap2/voltage.c
@@ -50,10 +50,6 @@ static struct omap_vdd_info **vdd_info;
  */
 static int nr_scalable_vdd;
 
-/* XXX document */
-static s16 prm_mod_offs;
-static s16 prm_irqst_ocp_mod_offs;
-
 static struct dentry *voltage_dir;
 
 /* Init function pointers */
@@ -147,7 +143,7 @@ static int vp_volt_debug_get(void *data, u64 *val)
                 return -EINVAL;
         }
 
-        vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage);
+        vsel = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->voltage);
 
         if (!vdd->pmic_info->vsel_to_uv) {
                 pr_warning("PMIC function to convert vsel to voltage"
@@ -197,19 +193,19 @@ static void vp_latch_vsel(struct omap_vdd_info *vdd)
 
         vsel = vdd->pmic_info->uv_to_vsel(uvdc);
 
-        vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig);
+        vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvoltage_mask |
                         vdd->vp_data->vp_common->vpconfig_initvdd);
         vpconfig |= vsel << vdd->vp_data->vp_common->vpconfig_initvoltage_shift;
 
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         /* Trigger initVDD value copy to voltage processor */
         vdd->write_reg((vpconfig | vdd->vp_data->vp_common->vpconfig_initvdd),
-                       prm_mod_offs, vdd->vp_data->vpconfig);
+                       vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         /* Clear initVDD copy trigger bit */
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 }
 
 /* Generic voltage init functions */
@@ -227,19 +223,19 @@ static void __init vp_init(struct omap_vdd_info *vdd)
                 (vdd->vp_rt_data.vpconfig_errorgain <<
                 vdd->vp_data->vp_common->vpconfig_errorgain_shift) |
                 vdd->vp_data->vp_common->vpconfig_timeouten;
-        vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         vp_val = ((vdd->vp_rt_data.vstepmin_smpswaittimemin <<
                 vdd->vp_data->vp_common->vstepmin_smpswaittimemin_shift) |
                 (vdd->vp_rt_data.vstepmin_stepmin <<
                 vdd->vp_data->vp_common->vstepmin_stepmin_shift));
-        vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vstepmin);
+        vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vstepmin);
 
         vp_val = ((vdd->vp_rt_data.vstepmax_smpswaittimemax <<
                 vdd->vp_data->vp_common->vstepmax_smpswaittimemax_shift) |
                 (vdd->vp_rt_data.vstepmax_stepmax <<
                 vdd->vp_data->vp_common->vstepmax_stepmax_shift));
-        vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vstepmax);
+        vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vstepmax);
 
         vp_val = ((vdd->vp_rt_data.vlimitto_vddmax <<
                 vdd->vp_data->vp_common->vlimitto_vddmax_shift) |
@@ -247,7 +243,7 @@ static void __init vp_init(struct omap_vdd_info *vdd)
                 vdd->vp_data->vp_common->vlimitto_vddmin_shift) |
                 (vdd->vp_rt_data.vlimitto_timeout <<
                 vdd->vp_data->vp_common->vlimitto_timeout_shift));
-        vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vlimitto);
+        vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vlimitto);
 }
 
 static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
@@ -336,23 +332,23 @@ static int _pre_volt_scale(struct omap_vdd_info *vdd,
                 volt_data = NULL;
 
         *target_vsel = vdd->pmic_info->uv_to_vsel(target_volt);
-        *current_vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage);
+        *current_vsel = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->voltage);
 
         /* Setting the ON voltage to the new target voltage */
-        vc_cmdval = vdd->read_reg(prm_mod_offs, vdd->vc_data->cmdval_reg);
+        vc_cmdval = vdd->read_reg(vdd->vc_data->vc_common->prm_mod, vdd->vc_data->cmdval_reg);
         vc_cmdval &= ~vc_common->cmd_on_mask;
         vc_cmdval |= (*target_vsel << vc_common->cmd_on_shift);
-        vdd->write_reg(vc_cmdval, prm_mod_offs, vdd->vc_data->cmdval_reg);
+        vdd->write_reg(vc_cmdval, vdd->vc_data->vc_common->prm_mod, vdd->vc_data->cmdval_reg);
 
         /* Setting vp errorgain based on the voltage */
         if (volt_data) {
-                vp_errgain_val = vdd->read_reg(prm_mod_offs,
+                vp_errgain_val = vdd->read_reg(vdd->vp_data->vp_common->prm_mod,
                                                vdd->vp_data->vpconfig);
                 vdd->vp_rt_data.vpconfig_errorgain = volt_data->vp_errgain;
                 vp_errgain_val &= ~vp_common->vpconfig_errorgain_mask;
                 vp_errgain_val |= vdd->vp_rt_data.vpconfig_errorgain <<
                         vp_common->vpconfig_errorgain_shift;
-                vdd->write_reg(vp_errgain_val, prm_mod_offs,
+                vdd->write_reg(vp_errgain_val, vdd->vp_data->vp_common->prm_mod,
                                vdd->vp_data->vpconfig);
         }
 
@@ -394,11 +390,11 @@ static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd,
                         (vdd->pmic_info->i2c_slave_addr <<
                         vdd->vc_data->vc_common->slaveaddr_shift);
 
-        vdd->write_reg(vc_bypass_value, prm_mod_offs, vc_bypass_val_reg);
-        vdd->write_reg(vc_bypass_value | vc_valid, prm_mod_offs,
+        vdd->write_reg(vc_bypass_value, vdd->vc_data->vc_common->prm_mod, vc_bypass_val_reg);
+        vdd->write_reg(vc_bypass_value | vc_valid, vdd->vc_data->vc_common->prm_mod,
                        vc_bypass_val_reg);
 
-        vc_bypass_value = vdd->read_reg(prm_mod_offs, vc_bypass_val_reg);
+        vc_bypass_value = vdd->read_reg(vdd->vc_data->vc_common->prm_mod, vc_bypass_val_reg);
         /*
          * Loop till the bypass command is acknowledged from the SMPS.
          * NOTE: This is legacy code. The loop count and retry count needs
@@ -417,7 +413,7 @@ static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd,
                         loop_cnt = 0;
                         udelay(10);
                 }
-                vc_bypass_value = vdd->read_reg(prm_mod_offs,
+                vc_bypass_value = vdd->read_reg(vdd->vc_data->vc_common->prm_mod,
                                                 vc_bypass_val_reg);
         }
 
@@ -445,8 +441,8 @@ static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
          */
         while (timeout++ < VP_TRANXDONE_TIMEOUT) {
                 vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status,
-                               prm_irqst_ocp_mod_offs, prm_irqst_reg);
-                if (!(vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) &
+                               vdd->prm_irqst_mod, prm_irqst_reg);
+                if (!(vdd->read_reg(vdd->prm_irqst_mod, prm_irqst_reg) &
                       vdd->vp_data->prm_irqst_data->tranxdone_status))
                         break;
                 udelay(1);
@@ -458,28 +454,28 @@ static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
         }
 
         /* Configure for VP-Force Update */
-        vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig);
+        vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvdd |
                         vdd->vp_data->vp_common->vpconfig_forceupdate |
                         vdd->vp_data->vp_common->vpconfig_initvoltage_mask);
         vpconfig |= ((target_vsel <<
                         vdd->vp_data->vp_common->vpconfig_initvoltage_shift));
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         /* Trigger initVDD value copy to voltage processor */
         vpconfig |= vdd->vp_data->vp_common->vpconfig_initvdd;
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         /* Force update of voltage */
         vpconfig |= vdd->vp_data->vp_common->vpconfig_forceupdate;
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         /*
          * Wait for TransactionDone. Typical latency is <200us.
          * Depends on SMPSWAITTIMEMIN/MAX and voltage change
          */
         timeout = 0;
-        omap_test_timeout((vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) &
+        omap_test_timeout((vdd->read_reg(vdd->prm_irqst_mod, prm_irqst_reg) &
                            vdd->vp_data->prm_irqst_data->tranxdone_status),
                           VP_TRANXDONE_TIMEOUT, timeout);
         if (timeout >= VP_TRANXDONE_TIMEOUT)
@@ -496,8 +492,8 @@ 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,
-                               prm_irqst_ocp_mod_offs, prm_irqst_reg);
-                if (!(vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) &
+                               vdd->prm_irqst_mod, prm_irqst_reg);
+                if (!(vdd->read_reg(vdd->prm_irqst_mod, prm_irqst_reg) &
                       vdd->vp_data->prm_irqst_data->tranxdone_status))
                         break;
                 udelay(1);
@@ -508,13 +504,13 @@ static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
                         "to clear the TRANXDONE status\n",
                         __func__, vdd->voltdm.name);
 
-        vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig);
+        vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         /* Clear initVDD copy trigger bit */
         vpconfig &= ~vdd->vp_data->vp_common->vpconfig_initvdd;
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         /* Clear force bit */
         vpconfig &= ~vdd->vp_data->vp_common->vpconfig_forceupdate;
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         return 0;
 }
@@ -525,10 +521,10 @@ static void __init omap3_vfsm_init(struct omap_vdd_info *vdd)
          * Voltage Manager FSM parameters init
          * XXX This data should be passed in from the board file
          */
-        vdd->write_reg(OMAP3_CLKSETUP, prm_mod_offs, OMAP3_PRM_CLKSETUP_OFFSET);
-        vdd->write_reg(OMAP3_VOLTOFFSET, prm_mod_offs,
+        vdd->write_reg(OMAP3_CLKSETUP, vdd->vc_data->vc_common->prm_mod, OMAP3_PRM_CLKSETUP_OFFSET);
+        vdd->write_reg(OMAP3_VOLTOFFSET, vdd->vc_data->vc_common->prm_mod,
                        OMAP3_PRM_VOLTOFFSET_OFFSET);
-        vdd->write_reg(OMAP3_VOLTSETUP2, prm_mod_offs,
+        vdd->write_reg(OMAP3_VOLTSETUP2, vdd->vc_data->vc_common->prm_mod,
                        OMAP3_PRM_VOLTSETUP2_OFFSET);
 }
 
@@ -550,15 +546,15 @@ static void __init omap3_vc_init(struct omap_vdd_info *vdd)
                 (onlp_vsel << vdd->vc_data->vc_common->cmd_onlp_shift) |
                 (ret_vsel << vdd->vc_data->vc_common->cmd_ret_shift) |
                 (off_vsel << vdd->vc_data->vc_common->cmd_off_shift));
-        vdd->write_reg(vc_val, prm_mod_offs, vdd->vc_data->cmdval_reg);
+        vdd->write_reg(vc_val, vdd->vc_data->vc_common->prm_mod, vdd->vc_data->cmdval_reg);
 
         /*
          * Generic VC parameters init
          * XXX This data should be abstracted out
          */
-        vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, prm_mod_offs,
+        vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, vdd->vc_data->vc_common->prm_mod,
                         OMAP3_PRM_VC_CH_CONF_OFFSET);
-        vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, prm_mod_offs,
+        vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, vdd->vc_data->vc_common->prm_mod,
                         OMAP3_PRM_VC_I2C_CFG_OFFSET);
 
         omap3_vfsm_init(vdd);
@@ -585,11 +581,11 @@ static void __init omap4_vc_init(struct omap_vdd_info *vdd)
         vc_val = (OMAP4430_RAV_VDD_MPU_L_MASK | OMAP4430_CMD_VDD_MPU_L_MASK |
                   OMAP4430_RAV_VDD_IVA_L_MASK | OMAP4430_CMD_VDD_IVA_L_MASK |
                   OMAP4430_RAV_VDD_CORE_L_MASK | OMAP4430_CMD_VDD_CORE_L_MASK);
-        vdd->write_reg(vc_val, prm_mod_offs, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET);
+        vdd->write_reg(vc_val, vdd->vc_data->vc_common->prm_mod, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET);
 
         /* XXX These are magic numbers and do not belong! */
         vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT);
-        vdd->write_reg(vc_val, prm_mod_offs, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);
+        vdd->write_reg(vc_val, vdd->vc_data->vc_common->prm_mod, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);
 
         is_initialized = true;
 }
@@ -612,27 +608,27 @@ static void __init omap_vc_init(struct omap_vdd_info *vdd)
         }
 
         /* Set up the SMPS_SA(i2c slave address in VC */
-        vc_val = vdd->read_reg(prm_mod_offs,
+        vc_val = vdd->read_reg(vdd->vc_data->vc_common->prm_mod,
                                vdd->vc_data->vc_common->smps_sa_reg);
         vc_val &= ~vdd->vc_data->smps_sa_mask;
         vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_data->smps_sa_shift;
-        vdd->write_reg(vc_val, prm_mod_offs,
+        vdd->write_reg(vc_val, vdd->vc_data->vc_common->prm_mod,
                        vdd->vc_data->vc_common->smps_sa_reg);
 
         /* Setup the VOLRA(pmic reg addr) in VC */
-        vc_val = vdd->read_reg(prm_mod_offs,
+        vc_val = vdd->read_reg(vdd->vc_data->vc_common->prm_mod,
                                vdd->vc_data->vc_common->smps_volra_reg);
         vc_val &= ~vdd->vc_data->smps_volra_mask;
         vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_data->smps_volra_shift;
-        vdd->write_reg(vc_val, prm_mod_offs,
+        vdd->write_reg(vc_val, vdd->vc_data->vc_common->prm_mod,
                        vdd->vc_data->vc_common->smps_volra_reg);
 
         /* Configure the setup times */
-        vc_val = vdd->read_reg(prm_mod_offs, vdd->vfsm->voltsetup_reg);
+        vc_val = vdd->read_reg(vdd->vc_data->vc_common->prm_mod, vdd->vfsm->voltsetup_reg);
         vc_val &= ~vdd->vfsm->voltsetup_mask;
         vc_val |= vdd->pmic_info->volt_setup_time <<
                         vdd->vfsm->voltsetup_shift;
-        vdd->write_reg(vc_val, prm_mod_offs, vdd->vfsm->voltsetup_reg);
+        vdd->write_reg(vc_val, vdd->vc_data->vc_common->prm_mod, vdd->vfsm->voltsetup_reg);
 
         if (cpu_is_omap34xx())
                 omap3_vc_init(vdd);
@@ -713,7 +709,7 @@ unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm)
                 return 0;
         }
 
-        curr_vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage);
+        curr_vsel = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->voltage);
 
         if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) {
                 pr_warning("%s: PMIC function to convert vsel to voltage"
@@ -755,9 +751,9 @@ void omap_vp_enable(struct voltagedomain *voltdm)
         vp_latch_vsel(vdd);
 
         /* Enable VP */
-        vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig);
+        vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         vpconfig |= vdd->vp_data->vp_common->vpconfig_vpenable;
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         vdd->vp_enabled = true;
 }
 
@@ -794,14 +790,14 @@ void omap_vp_disable(struct voltagedomain *voltdm)
         }
 
         /* Disable VP */
-        vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig);
+        vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
         vpconfig &= ~vdd->vp_data->vp_common->vpconfig_vpenable;
-        vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig);
+        vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig);
 
         /*
          * Wait for VP idle Typical latency is <2us. Maximum latency is ~100us
          */
-        omap_test_timeout((vdd->read_reg(prm_mod_offs, vdd->vp_data->vstatus)),
+        omap_test_timeout((vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vstatus)),
                                 VP_IDLE_TIMEOUT, timeout);
 
         if (timeout >= VP_IDLE_TIMEOUT)
@@ -1094,12 +1090,9 @@ int __init omap_voltage_late_init(void)
 }
 
 /* XXX document */
-int __init omap_voltage_early_init(s16 prm_mod, s16 prm_irqst_ocp_mod,
-                                   struct omap_vdd_info *omap_vdd_array[],
+int __init omap_voltage_early_init(struct omap_vdd_info *omap_vdd_array[],
                                    u8 omap_vdd_count)
 {
-        prm_mod_offs = prm_mod;
-        prm_irqst_ocp_mod_offs = prm_irqst_ocp_mod;
         vdd_info = omap_vdd_array;
         nr_scalable_vdd = omap_vdd_count;
         return 0;
diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
index e9f5408244e0..ffdc55ee1644 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -119,6 +119,7 @@ struct omap_volt_pmic_info {
  * @voltdm              : pointer to the voltage domain structure
  * @debug_dir           : debug directory for this voltage domain.
  * @curr_volt           : current voltage for this vdd.
+ * @prm_irqst_mod       : PRM module id used for PRM IRQ status register access
  * @vp_enabled          : flag to keep track of whether vp is enabled or not
  * @volt_scale          : API to scale the voltage of the vdd.
  */
@@ -133,6 +134,8 @@ struct omap_vdd_info {
         struct dentry *debug_dir;
         u32 curr_volt;
         bool vp_enabled;
+
+        s16 prm_irqst_mod;
         u32 (*read_reg) (u16 mod, u8 offset);
         void (*write_reg) (u32 val, u16 mod, u8 offset);
         int (*volt_scale) (struct omap_vdd_info *vdd,
@@ -151,8 +154,7 @@ struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
                 unsigned long volt);
 unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
 struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
-int __init omap_voltage_early_init(s16 prm_mod, s16 prm_irqst_mod,
-                                   struct omap_vdd_info *omap_vdd_array[],
+int __init omap_voltage_early_init(struct omap_vdd_info *omap_vdd_array[],
                                    u8 omap_vdd_count);
 #ifdef CONFIG_PM
 int omap_voltage_register_pmic(struct voltagedomain *voltdm,
diff --git a/arch/arm/mach-omap2/voltagedomains3xxx_data.c b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
index def230fd2fde..0d30b7fe269b 100644
--- a/arch/arm/mach-omap2/voltagedomains3xxx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains3xxx_data.c
@@ -38,6 +38,7 @@ static const struct omap_vfsm_instance_data omap3_vdd1_vfsm_data = {
 };
 
 static struct omap_vdd_info omap3_vdd1_info = {
+        .prm_irqst_mod = OCP_MOD,
         .vp_data = &omap3_vp1_data,
         .vc_data = &omap3_vc1_data,
         .vfsm = &omap3_vdd1_vfsm_data,
@@ -53,6 +54,7 @@ static const struct omap_vfsm_instance_data omap3_vdd2_vfsm_data = {
 };
 
 static struct omap_vdd_info omap3_vdd2_info = {
+        .prm_irqst_mod = OCP_MOD,
         .vp_data = &omap3_vp2_data,
         .vc_data = &omap3_vc2_data,
         .vfsm = &omap3_vdd2_vfsm_data,
@@ -70,9 +72,6 @@ static struct omap_vdd_info *omap3_vdd_info[] = {
 /* OMAP3 specific voltage init functions */
 static int __init omap3xxx_voltage_early_init(void)
 {
-        s16 prm_mod = OMAP3430_GR_MOD;
-        s16 prm_irqst_ocp_mod = OCP_MOD;
-
         if (!cpu_is_omap34xx())
                 return 0;
 
@@ -88,8 +87,7 @@ static int __init omap3xxx_voltage_early_init(void)
                 omap3_vdd2_info.volt_data = omap34xx_vddcore_volt_data;
         }
 
-        return omap_voltage_early_init(prm_mod, prm_irqst_ocp_mod,
-                                       omap3_vdd_info,
+        return omap_voltage_early_init(omap3_vdd_info,
                                        ARRAY_SIZE(omap3_vdd_info));
 };
 core_initcall(omap3xxx_voltage_early_init);
diff --git a/arch/arm/mach-omap2/voltagedomains44xx_data.c b/arch/arm/mach-omap2/voltagedomains44xx_data.c
index cb64996de0e1..1c2d7d78de13 100644
--- a/arch/arm/mach-omap2/voltagedomains44xx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains44xx_data.c
@@ -37,6 +37,7 @@ 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,
         .vp_data = &omap4_vp_mpu_data,
         .vc_data = &omap4_vc_mpu_data,
         .vfsm = &omap4_vdd_mpu_vfsm_data,
@@ -50,6 +51,7 @@ 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,
         .vp_data = &omap4_vp_iva_data,
         .vc_data = &omap4_vc_iva_data,
         .vfsm = &omap4_vdd_iva_vfsm_data,
@@ -63,6 +65,7 @@ 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,
         .vp_data = &omap4_vp_core_data,
         .vc_data = &omap4_vc_core_data,
         .vfsm = &omap4_vdd_core_vfsm_data,
@@ -81,9 +84,6 @@ static struct omap_vdd_info *omap4_vdd_info[] = {
 /* OMAP4 specific voltage init functions */
 static int __init omap44xx_voltage_early_init(void)
 {
-        s16 prm_mod = OMAP4430_PRM_DEVICE_INST;
-        s16 prm_irqst_ocp_mod = OMAP4430_PRM_OCP_SOCKET_INST;
-
         if (!cpu_is_omap44xx())
                 return 0;
 
@@ -95,8 +95,7 @@ static int __init omap44xx_voltage_early_init(void)
         omap4_vdd_iva_info.volt_data = omap44xx_vdd_iva_volt_data;
         omap4_vdd_core_info.volt_data = omap44xx_vdd_core_volt_data;
 
-        return omap_voltage_early_init(prm_mod, prm_irqst_ocp_mod,
-                                       omap4_vdd_info,
+        return omap_voltage_early_init(omap4_vdd_info,
                                        ARRAY_SIZE(omap4_vdd_info));
 };
 core_initcall(omap44xx_voltage_early_init);
diff --git a/arch/arm/mach-omap2/vp.h b/arch/arm/mach-omap2/vp.h
index 7ce134f7de79..d277da6c0378 100644
--- a/arch/arm/mach-omap2/vp.h
+++ b/arch/arm/mach-omap2/vp.h
@@ -42,6 +42,7 @@
  * @vpconfig_vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg
  * @vpconfig_vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg
  * @vpconfig_vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg
+ * @prm_mod: PRM module id used for PRM register access
  *
  * XXX It it not necessary to have both a mask and a shift for the same
  *     bitfield - remove one
@@ -54,6 +55,7 @@ struct omap_vp_common_data {
         u32 vpconfig_initvdd;
         u32 vpconfig_forceupdate;
         u32 vpconfig_vpenable;
+        s16 prm_mod;
         u8 vpconfig_erroroffset_shift;
         u8 vpconfig_errorgain_shift;
         u8 vpconfig_initvoltage_shift;
diff --git a/arch/arm/mach-omap2/vp3xxx_data.c b/arch/arm/mach-omap2/vp3xxx_data.c
index 645217094e51..c9b3e64d4e4e 100644
--- a/arch/arm/mach-omap2/vp3xxx_data.c
+++ b/arch/arm/mach-omap2/vp3xxx_data.c
@@ -31,6 +31,7 @@
  * XXX This stuff presumably belongs in the vp3xxx.c or vp.c file.
  */
 static const struct omap_vp_common_data omap3_vp_common = {
+        .prm_mod = OMAP3430_GR_MOD,
         .vpconfig_erroroffset_shift = OMAP3430_ERROROFFSET_SHIFT,
         .vpconfig_errorgain_mask = OMAP3430_ERRORGAIN_MASK,
         .vpconfig_errorgain_shift = OMAP3430_ERRORGAIN_SHIFT,
diff --git a/arch/arm/mach-omap2/vp44xx_data.c b/arch/arm/mach-omap2/vp44xx_data.c
index 65d1ad63800a..1a0842e59e83 100644
--- a/arch/arm/mach-omap2/vp44xx_data.c
+++ b/arch/arm/mach-omap2/vp44xx_data.c
@@ -32,6 +32,7 @@
  * XXX This stuff presumably belongs in the vp44xx.c or vp.c file.
  */
 static const struct omap_vp_common_data omap4_vp_common = {
+        .prm_mod = OMAP4430_PRM_DEVICE_INST,
         .vpconfig_erroroffset_shift = OMAP4430_ERROROFFSET_SHIFT,
         .vpconfig_errorgain_mask = OMAP4430_ERRORGAIN_MASK,
         .vpconfig_errorgain_shift = OMAP4430_ERRORGAIN_SHIFT,