2 files changed, 316 insertions, 73 deletions

diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index 39cf14606784..92ceed0fc65e 100644
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -1,7 +1,7 @@
 /*
  * Driver for Regulator part of Palmas PMIC Chips
  *
- * Copyright 2011-2012 Texas Instruments Inc.
+ * Copyright 2011-2013 Texas Instruments Inc.
  *
  * Author: Graeme Gregory <gg@slimlogic.co.uk>
  * Author: Ian Lartey <ian@slimlogic.co.uk>
@@ -29,6 +29,7 @@
 
 struct regs_info {
         char    *name;
+        char    *sname;
         u8      vsel_addr;
         u8      ctrl_addr;
         u8      tstep_addr;
@@ -37,115 +38,159 @@ struct regs_info {
 static const struct regs_info palmas_regs_info[] = {
         {
                 .name           = "SMPS12",
+                .sname          = "smps1-in",
                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
         },
         {
                 .name           = "SMPS123",
+                .sname          = "smps1-in",
                 .vsel_addr      = PALMAS_SMPS12_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS12_CTRL,
                 .tstep_addr     = PALMAS_SMPS12_TSTEP,
         },
         {
                 .name           = "SMPS3",
+                .sname          = "smps3-in",
                 .vsel_addr      = PALMAS_SMPS3_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS3_CTRL,
         },
         {
                 .name           = "SMPS45",
+                .sname          = "smps4-in",
                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
         },
         {
                 .name           = "SMPS457",
+                .sname          = "smps4-in",
                 .vsel_addr      = PALMAS_SMPS45_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS45_CTRL,
                 .tstep_addr     = PALMAS_SMPS45_TSTEP,
         },
         {
                 .name           = "SMPS6",
+                .sname          = "smps6-in",
                 .vsel_addr      = PALMAS_SMPS6_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS6_CTRL,
                 .tstep_addr     = PALMAS_SMPS6_TSTEP,
         },
         {
                 .name           = "SMPS7",
+                .sname          = "smps7-in",
                 .vsel_addr      = PALMAS_SMPS7_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS7_CTRL,
         },
         {
                 .name           = "SMPS8",
+                .sname          = "smps8-in",
                 .vsel_addr      = PALMAS_SMPS8_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS8_CTRL,
                 .tstep_addr     = PALMAS_SMPS8_TSTEP,
         },
         {
                 .name           = "SMPS9",
+                .sname          = "smps9-in",
                 .vsel_addr      = PALMAS_SMPS9_VOLTAGE,
                 .ctrl_addr      = PALMAS_SMPS9_CTRL,
         },
         {
                 .name           = "SMPS10",
+                .sname          = "smps10-in",
+                .ctrl_addr      = PALMAS_SMPS10_CTRL,
         },
         {
                 .name           = "LDO1",
+                .sname          = "ldo1-in",
                 .vsel_addr      = PALMAS_LDO1_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO1_CTRL,
         },
         {
                 .name           = "LDO2",
+                .sname          = "ldo2-in",
                 .vsel_addr      = PALMAS_LDO2_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO2_CTRL,
         },
         {
                 .name           = "LDO3",
+                .sname          = "ldo3-in",
                 .vsel_addr      = PALMAS_LDO3_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO3_CTRL,
         },
         {
                 .name           = "LDO4",
+                .sname          = "ldo4-in",
                 .vsel_addr      = PALMAS_LDO4_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO4_CTRL,
         },
         {
                 .name           = "LDO5",
+                .sname          = "ldo5-in",
                 .vsel_addr      = PALMAS_LDO5_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO5_CTRL,
         },
         {
                 .name           = "LDO6",
+                .sname          = "ldo6-in",
                 .vsel_addr      = PALMAS_LDO6_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO6_CTRL,
         },
         {
                 .name           = "LDO7",
+                .sname          = "ldo7-in",
                 .vsel_addr      = PALMAS_LDO7_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO7_CTRL,
         },
         {
                 .name           = "LDO8",
+                .sname          = "ldo8-in",
                 .vsel_addr      = PALMAS_LDO8_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO8_CTRL,
         },
         {
                 .name           = "LDO9",
+                .sname          = "ldo9-in",
                 .vsel_addr      = PALMAS_LDO9_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDO9_CTRL,
         },
         {
                 .name           = "LDOLN",
+                .sname          = "ldoln-in",
                 .vsel_addr      = PALMAS_LDOLN_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDOLN_CTRL,
         },
         {
                 .name           = "LDOUSB",
+                .sname          = "ldousb-in",
                 .vsel_addr      = PALMAS_LDOUSB_VOLTAGE,
                 .ctrl_addr      = PALMAS_LDOUSB_CTRL,
         },
+        {
+                .name           = "REGEN1",
+                .ctrl_addr      = PALMAS_REGEN1_CTRL,
+        },
+        {
+                .name           = "REGEN2",
+                .ctrl_addr      = PALMAS_REGEN2_CTRL,
+        },
+        {
+                .name           = "REGEN3",
+                .ctrl_addr      = PALMAS_REGEN3_CTRL,
+        },
+        {
+                .name           = "SYSEN1",
+                .ctrl_addr      = PALMAS_SYSEN1_CTRL,
+        },
+        {
+                .name           = "SYSEN2",
+                .ctrl_addr      = PALMAS_SYSEN2_CTRL,
+        },
 };
 
+static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
+
 #define SMPS_CTRL_MODE_OFF              0x00
 #define SMPS_CTRL_MODE_ON               0x01
 #define SMPS_CTRL_MODE_ECO              0x02
@@ -231,7 +276,10 @@ static int palmas_enable_smps(struct regulator_dev *dev)
         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
 
         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
-        reg |= SMPS_CTRL_MODE_ON;
+        if (pmic->current_reg_mode[id])
+                reg |= pmic->current_reg_mode[id];
+        else
+                reg |= SMPS_CTRL_MODE_ON;
 
         palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 
@@ -253,16 +301,19 @@ static int palmas_disable_smps(struct regulator_dev *dev)
         return 0;
 }
 
-
 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
 {
         struct palmas_pmic *pmic = rdev_get_drvdata(dev);
         int id = rdev_get_id(dev);
         unsigned int reg;
+        bool rail_enable = true;
 
         palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
         reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 
+        if (reg == SMPS_CTRL_MODE_OFF)
+                rail_enable = false;
+
         switch (mode) {
         case REGULATOR_MODE_NORMAL:
                 reg |= SMPS_CTRL_MODE_ON;
@@ -276,8 +327,11 @@ static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
         default:
                 return -EINVAL;
         }
-        palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
 
+        pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
+        if (rail_enable)
+                palmas_smps_write(pmic->palmas,
+                        palmas_regs_info[id].ctrl_addr, reg);
         return 0;
 }
 
@@ -287,9 +341,7 @@ static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
         int id = rdev_get_id(dev);
         unsigned int reg;
 
-        palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
-        reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
-        reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
+        reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
 
         switch (reg) {
         case SMPS_CTRL_MODE_ON:
@@ -356,6 +408,63 @@ static int palmas_map_voltage_smps(struct regulator_dev *rdev,
         return ret;
 }
 
+static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev,
+        unsigned int old_selector, unsigned int new_selector)
+{
+        struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
+        int id = rdev_get_id(rdev);
+        int old_uv, new_uv;
+        unsigned int ramp_delay = pmic->ramp_delay[id];
+
+        if (!ramp_delay)
+                return 0;
+
+        old_uv = palmas_list_voltage_smps(rdev, old_selector);
+        if (old_uv < 0)
+                return old_uv;
+
+        new_uv = palmas_list_voltage_smps(rdev, new_selector);
+        if (new_uv < 0)
+                return new_uv;
+
+        return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay);
+}
+
+static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev,
+                 int ramp_delay)
+{
+        struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
+        int id = rdev_get_id(rdev);
+        unsigned int reg = 0;
+        unsigned int addr = palmas_regs_info[id].tstep_addr;
+        int ret;
+
+        /* SMPS3 and SMPS7 do not have tstep_addr setting */
+        switch (id) {
+        case PALMAS_REG_SMPS3:
+        case PALMAS_REG_SMPS7:
+                return 0;
+        }
+
+        if (ramp_delay <= 0)
+                reg = 0;
+        else if (ramp_delay <= 2500)
+                reg = 3;
+        else if (ramp_delay <= 5000)
+                reg = 2;
+        else
+                reg = 1;
+
+        ret = palmas_smps_write(pmic->palmas, addr, reg);
+        if (ret < 0) {
+                dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret);
+                return ret;
+        }
+
+        pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg];
+        return ret;
+}
+
 static struct regulator_ops palmas_ops_smps = {
         .is_enabled             = palmas_is_enabled_smps,
         .enable                 = palmas_enable_smps,
@@ -366,6 +475,8 @@ static struct regulator_ops palmas_ops_smps = {
         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
         .list_voltage           = palmas_list_voltage_smps,
         .map_voltage            = palmas_map_voltage_smps,
+        .set_voltage_time_sel   = palma_smps_set_voltage_smps_time_sel,
+        .set_ramp_delay         = palmas_smps_set_ramp_delay,
 };
 
 static struct regulator_ops palmas_ops_smps10 = {
@@ -401,6 +512,12 @@ static struct regulator_ops palmas_ops_ldo = {
         .map_voltage            = regulator_map_voltage_linear,
 };
 
+static struct regulator_ops palmas_ops_extreg = {
+        .is_enabled             = regulator_is_enabled_regmap,
+        .enable                 = regulator_enable_regmap,
+        .disable                = regulator_disable_regmap,
+};
+
 /*
  * setup the hardware based sleep configuration of the SMPS/LDO regulators
  * from the platform data. This is different to the software based control
@@ -422,40 +539,32 @@ static int palmas_smps_init(struct palmas *palmas, int id,
 
         switch (id) {
         case PALMAS_REG_SMPS10:
-                if (reg_init->mode_sleep) {
-                        reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
+                reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
+                if (reg_init->mode_sleep)
                         reg |= reg_init->mode_sleep <<
                                         PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
-                }
                 break;
         default:
                 if (reg_init->warm_reset)
                         reg |= PALMAS_SMPS12_CTRL_WR_S;
+                else
+                        reg &= ~PALMAS_SMPS12_CTRL_WR_S;
 
                 if (reg_init->roof_floor)
                         reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
+                else
+                        reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
 
-                if (reg_init->mode_sleep) {
-                        reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
+                reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
+                if (reg_init->mode_sleep)
                         reg |= reg_init->mode_sleep <<
                                         PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
-                }
         }
 
         ret = palmas_smps_write(palmas, addr, reg);
         if (ret)
                 return ret;
 
-        if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
-                addr = palmas_regs_info[id].tstep_addr;
-
-                reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;
-
-                ret = palmas_smps_write(palmas, addr, reg);
-                if (ret)
-                        return ret;
-        }
-
         if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
                 addr = palmas_regs_info[id].vsel_addr;
 
@@ -485,9 +594,13 @@ static int palmas_ldo_init(struct palmas *palmas, int id,
 
         if (reg_init->warm_reset)
                 reg |= PALMAS_LDO1_CTRL_WR_S;
+        else
+                reg &= ~PALMAS_LDO1_CTRL_WR_S;
 
         if (reg_init->mode_sleep)
                 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
+        else
+                reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP;
 
         ret = palmas_ldo_write(palmas, addr, reg);
         if (ret)
@@ -496,6 +609,68 @@ static int palmas_ldo_init(struct palmas *palmas, int id,
         return 0;
 }
 
+static int palmas_extreg_init(struct palmas *palmas, int id,
+                struct palmas_reg_init *reg_init)
+{
+        unsigned int addr;
+        int ret;
+        unsigned int val = 0;
+
+        addr = palmas_regs_info[id].ctrl_addr;
+
+        if (reg_init->mode_sleep)
+                val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
+
+        ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
+                        addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
+        if (ret < 0) {
+                dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
+                        addr, ret);
+                return ret;
+        }
+        return 0;
+}
+
+static void palmas_enable_ldo8_track(struct palmas *palmas)
+{
+        unsigned int reg;
+        unsigned int addr;
+        int ret;
+
+        addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr;
+
+        ret = palmas_ldo_read(palmas, addr, &reg);
+        if (ret) {
+                dev_err(palmas->dev, "Error in reading ldo8 control reg\n");
+                return;
+        }
+
+        reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN;
+        ret = palmas_ldo_write(palmas, addr, reg);
+        if (ret < 0) {
+                dev_err(palmas->dev, "Error in enabling tracking mode\n");
+                return;
+        }
+        /*
+         * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8
+         * output is defined by the LDO8_VOLTAGE.VSEL register divided by two,
+         * and can be set from 0.45 to 1.65 V.
+         */
+        addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr;
+        ret = palmas_ldo_read(palmas, addr, &reg);
+        if (ret) {
+                dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n");
+                return;
+        }
+
+        reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK;
+        ret = palmas_ldo_write(palmas, addr, reg);
+        if (ret < 0)
+                dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n");
+
+        return;
+}
+
 static struct of_regulator_match palmas_matches[] = {
         { .name = "smps12", },
         { .name = "smps123", },
@@ -518,6 +693,11 @@ static struct of_regulator_match palmas_matches[] = {
         { .name = "ldo9", },
         { .name = "ldoln", },
         { .name = "ldousb", },
+        { .name = "regen1", },
+        { .name = "regen2", },
+        { .name = "regen3", },
+        { .name = "sysen1", },
+        { .name = "sysen2", },
 };
 
 static void palmas_dt_to_pdata(struct device *dev,
@@ -553,39 +733,36 @@ static void palmas_dt_to_pdata(struct device *dev,
                 pdata->reg_init[idx] = devm_kzalloc(dev,
                                 sizeof(struct palmas_reg_init), GFP_KERNEL);
 
-                ret = of_property_read_u32(palmas_matches[idx].of_node,
-                                "ti,warm_reset", &prop);
-                if (!ret)
-                        pdata->reg_init[idx]->warm_reset = prop;
+                pdata->reg_init[idx]->warm_reset =
+                        of_property_read_bool(palmas_matches[idx].of_node,
+                                             "ti,warm-reset");
 
-                ret = of_property_read_u32(palmas_matches[idx].of_node,
-                                "ti,roof_floor", &prop);
-                if (!ret)
-                        pdata->reg_init[idx]->roof_floor = prop;
+                pdata->reg_init[idx]->roof_floor =
+                        of_property_read_bool(palmas_matches[idx].of_node,
+                                              "ti,roof-floor");
 
                 ret = of_property_read_u32(palmas_matches[idx].of_node,
-                                "ti,mode_sleep", &prop);
+                                "ti,mode-sleep", &prop);
                 if (!ret)
                         pdata->reg_init[idx]->mode_sleep = prop;
 
-                ret = of_property_read_u32(palmas_matches[idx].of_node,
-                                "ti,tstep", &prop);
-                if (!ret)
-                        pdata->reg_init[idx]->tstep = prop;
+                ret = of_property_read_bool(palmas_matches[idx].of_node,
+                                            "ti,smps-range");
+                if (ret)
+                        pdata->reg_init[idx]->vsel =
+                                PALMAS_SMPS12_VOLTAGE_RANGE;
 
-                ret = of_property_read_u32(palmas_matches[idx].of_node,
-                                "ti,vsel", &prop);
-                if (!ret)
-                        pdata->reg_init[idx]->vsel = prop;
+                if (idx == PALMAS_REG_LDO8)
+                        pdata->enable_ldo8_tracking = of_property_read_bool(
+                                                palmas_matches[idx].of_node,
+                                                "ti,enable-ldo8-tracking");
         }
 
-        ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
-        if (!ret)
-                pdata->ldo6_vibrator = prop;
+        pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
 }
 
 
-static int palmas_probe(struct platform_device *pdev)
+static int palmas_regulators_probe(struct platform_device *pdev)
 {
         struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
         struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
@@ -630,6 +807,7 @@ static int palmas_probe(struct platform_device *pdev)
         config.driver_data = pmic;
 
         for (id = 0; id < PALMAS_REG_LDO1; id++) {
+                bool ramp_delay_support = false;
 
                 /*
                  * Miss out regulators which are not available due
@@ -640,19 +818,42 @@ static int palmas_probe(struct platform_device *pdev)
                 case PALMAS_REG_SMPS3:
                         if (pmic->smps123)
                                 continue;
+                        if (id == PALMAS_REG_SMPS12)
+                                ramp_delay_support = true;
                         break;
                 case PALMAS_REG_SMPS123:
                         if (!pmic->smps123)
                                 continue;
+                        ramp_delay_support = true;
                         break;
                 case PALMAS_REG_SMPS45:
                 case PALMAS_REG_SMPS7:
                         if (pmic->smps457)
                                 continue;
+                        if (id == PALMAS_REG_SMPS45)
+                                ramp_delay_support = true;
                         break;
                 case PALMAS_REG_SMPS457:
                         if (!pmic->smps457)
                                 continue;
+                        ramp_delay_support = true;
+                        break;
+                }
+
+                if ((id == PALMAS_REG_SMPS6) && (id == PALMAS_REG_SMPS8))
+                        ramp_delay_support = true;
+
+                if (ramp_delay_support) {
+                        addr = palmas_regs_info[id].tstep_addr;
+                        ret = palmas_smps_read(pmic->palmas, addr, &reg);
+                        if (ret < 0) {
+                                dev_err(&pdev->dev,
+                                        "reading TSTEP reg failed: %d\n", ret);
+                                goto err_unregister_regulator;
+                        }
+                        pmic->desc[id].ramp_delay =
+                                        palmas_smps_ramp_delay[reg & 0x3];
+                        pmic->ramp_delay[id] = pmic->desc[id].ramp_delay;
                 }
 
                 /* Initialise sleep/init values from platform data */
@@ -686,7 +887,8 @@ static int palmas_probe(struct platform_device *pdev)
                         /*
                          * Read and store the RANGE bit for later use
                          * This must be done before regulator is probed,
-                         * otherwise we error in probe with unsupportable ranges.
+                         * otherwise we error in probe with unsupportable
+                         * ranges. Read the current smps mode for later use.
                          */
                         addr = palmas_regs_info[id].vsel_addr;
 
@@ -703,6 +905,14 @@ static int palmas_probe(struct platform_device *pdev)
                                                 palmas_regs_info[id].vsel_addr);
                         pmic->desc[id].vsel_mask =
                                         PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
+
+                        /* Read the smps mode for later use. */
+                        addr = palmas_regs_info[id].ctrl_addr;
+                        ret = palmas_smps_read(pmic->palmas, addr, &reg);
+                        if (ret)
+                                goto err_unregister_regulator;
+                        pmic->current_reg_mode[id] = reg &
+                                        PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
                 }
 
                 pmic->desc[id].type = REGULATOR_VOLTAGE;
@@ -713,6 +923,7 @@ static int palmas_probe(struct platform_device *pdev)
                 else
                         config.init_data = NULL;
 
+                pmic->desc[id].supply_name = palmas_regs_info[id].sname;
                 config.of_node = palmas_matches[id].of_node;
 
                 rdev = regulator_register(&pmic->desc[id], &config);
@@ -738,27 +949,49 @@ static int palmas_probe(struct platform_device *pdev)
                 /* Register the regulators */
                 pmic->desc[id].name = palmas_regs_info[id].name;
                 pmic->desc[id].id = id;
-                pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
-
-                pmic->desc[id].ops = &palmas_ops_ldo;
-
                 pmic->desc[id].type = REGULATOR_VOLTAGE;
                 pmic->desc[id].owner = THIS_MODULE;
-                pmic->desc[id].min_uV = 900000;
-                pmic->desc[id].uV_step = 50000;
-                pmic->desc[id].linear_min_sel = 1;
-                pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
+
+                if (id < PALMAS_REG_REGEN1) {
+                        pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
+                        pmic->desc[id].ops = &palmas_ops_ldo;
+                        pmic->desc[id].min_uV = 900000;
+                        pmic->desc[id].uV_step = 50000;
+                        pmic->desc[id].linear_min_sel = 1;
+                        pmic->desc[id].vsel_reg =
+                                        PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
                                                 palmas_regs_info[id].vsel_addr);
-                pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
-                pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
+                        pmic->desc[id].vsel_mask =
+                                        PALMAS_LDO1_VOLTAGE_VSEL_MASK;
+                        pmic->desc[id].enable_reg =
+                                        PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
+                                                palmas_regs_info[id].ctrl_addr);
+                        pmic->desc[id].enable_mask =
+                                        PALMAS_LDO1_CTRL_MODE_ACTIVE;
+
+                        /* Check if LDO8 is in tracking mode or not */
+                        if (pdata && (id == PALMAS_REG_LDO8) &&
+                                        pdata->enable_ldo8_tracking) {
+                                palmas_enable_ldo8_track(palmas);
+                                pmic->desc[id].min_uV = 450000;
+                                pmic->desc[id].uV_step = 25000;
+                        }
+                } else {
+                        pmic->desc[id].n_voltages = 1;
+                        pmic->desc[id].ops = &palmas_ops_extreg;
+                        pmic->desc[id].enable_reg =
+                                        PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
                                                 palmas_regs_info[id].ctrl_addr);
-                pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
+                        pmic->desc[id].enable_mask =
+                                        PALMAS_REGEN1_CTRL_MODE_ACTIVE;
+                }
 
                 if (pdata)
                         config.init_data = pdata->reg_data[id];
                 else
                         config.init_data = NULL;
 
+                pmic->desc[id].supply_name = palmas_regs_info[id].sname;
                 config.of_node = palmas_matches[id].of_node;
 
                 rdev = regulator_register(&pmic->desc[id], &config);
@@ -777,7 +1010,12 @@ static int palmas_probe(struct platform_device *pdev)
                 if (pdata) {
                         reg_init = pdata->reg_init[id];
                         if (reg_init) {
-                                ret = palmas_ldo_init(palmas, id, reg_init);
+                                if (id < PALMAS_REG_REGEN1)
+                                        ret = palmas_ldo_init(palmas,
+                                                        id, reg_init);
+                                else
+                                        ret = palmas_extreg_init(palmas,
+                                                        id, reg_init);
                                 if (ret) {
                                         regulator_unregister(pmic->rdev[id]);
                                         goto err_unregister_regulator;
@@ -786,6 +1024,7 @@ static int palmas_probe(struct platform_device *pdev)
                 }
         }
 
+
         return 0;
 
 err_unregister_regulator:
@@ -794,7 +1033,7 @@ err_unregister_regulator:
         return ret;
 }
 
-static int palmas_remove(struct platform_device *pdev)
+static int palmas_regulators_remove(struct platform_device *pdev)
 {
         struct palmas_pmic *pmic = platform_get_drvdata(pdev);
         int id;
@@ -806,6 +1045,12 @@ static int palmas_remove(struct platform_device *pdev)
 
 static struct of_device_id of_palmas_match_tbl[] = {
         { .compatible = "ti,palmas-pmic", },
+        { .compatible = "ti,twl6035-pmic", },
+        { .compatible = "ti,twl6036-pmic", },
+        { .compatible = "ti,twl6037-pmic", },
+        { .compatible = "ti,tps65913-pmic", },
+        { .compatible = "ti,tps65914-pmic", },
+        { .compatible = "ti,tps80036-pmic", },
         { /* end */ }
 };
 
@@ -815,8 +1060,8 @@ static struct platform_driver palmas_driver = {
                 .of_match_table = of_palmas_match_tbl,
                 .owner = THIS_MODULE,
         },
-        .probe = palmas_probe,
-        .remove = palmas_remove,
+        .probe = palmas_regulators_probe,
+        .remove = palmas_regulators_remove,
 };
 
 static int __init palmas_init(void)
diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index 3bbda22721ea..ecddc5173c7c 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -109,19 +109,6 @@ struct palmas_reg_init {
          */
         int mode_sleep;
 
-        /* tstep is the timestep loaded to the TSTEP register
-         *
-         * For SMPS
-         *
-         * 0: Jump (no slope control)
-         * 1: 10mV/us
-         * 2: 5mV/us
-         * 3: 2.5mV/us
-         *
-         * For LDO unused
-         */
-        int tstep;
-
         /* voltage_sel is the bitfield loaded onto the SMPSX_VOLTAGE
          * register. Set this is the default voltage set in OTP needs
          * to be overridden.
@@ -154,6 +141,12 @@ enum palmas_regulators {
         PALMAS_REG_LDO9,
         PALMAS_REG_LDOLN,
         PALMAS_REG_LDOUSB,
+        /* External regulators */
+        PALMAS_REG_REGEN1,
+        PALMAS_REG_REGEN2,
+        PALMAS_REG_REGEN3,
+        PALMAS_REG_SYSEN1,
+        PALMAS_REG_SYSEN2,
         /* Total number of regulators */
         PALMAS_NUM_REGS,
 };
@@ -171,6 +164,9 @@ struct palmas_pmic_platform_data {
 
         /* use LDO6 for vibrator control */
         int ldo6_vibrator;
+
+        /* Enable tracking mode of LDO8 */
+        bool enable_ldo8_tracking;
 };
 
 struct palmas_usb_platform_data {
@@ -331,6 +327,8 @@ struct palmas_pmic {
         int smps457;
 
         int range[PALMAS_REG_SMPS10];
+        unsigned int ramp_delay[PALMAS_REG_SMPS10];
+        unsigned int current_reg_mode[PALMAS_REG_SMPS10];
 };
 
 struct palmas_resource {