[ARM] tps6591x: Adding regulator and mfd driver
Laxman Dewangan [Fri, 21 Jan 2011 11:09:41 +0000 (16:09 +0530)]
Adding regulator and mfd core driver for TI TPS6591x PMIC family.

Original-Change-Id: I65c0e4758094f211f7e9f0944423bd935c1893c4
Reviewed-on: http://git-master/r/16529
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Tested-by: Scott Williams <scwilliams@nvidia.com>
Original-Change-Id: I2f82c178e3db0998e7c1a5a3b6b8e49832deaf59

Rebase-Id: Rc23fcc1e98e212ae6dc61a2458cafa016442b441

drivers/regulator/Kconfig
drivers/regulator/Makefile
drivers/regulator/tps6591x-regulator.c [new file with mode: 0755]

index 39db573..94e7c7a 100644 (file)
@@ -325,5 +325,12 @@ config REGULATOR_AAT2870
          If you have a AnalogicTech AAT2870 say Y to enable the
          regulator driver.
 
+config REGULATOR_TPS6591X
+       tristate "TI TPS6591X Power regulators"
+       depends on MFD_TPS6591X
+       default n
+       help
+         This driver supports TPS6591X voltage regulator chips.
+
 endif
 
index d7610f5..80f0685 100644 (file)
@@ -28,6 +28,7 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
 obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
+obj-$(CONFIG_REGULATOR_TPS6591X) += tps6591x-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
 obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
diff --git a/drivers/regulator/tps6591x-regulator.c b/drivers/regulator/tps6591x-regulator.c
new file mode 100755 (executable)
index 0000000..89fcbf9
--- /dev/null
@@ -0,0 +1,597 @@
+/*
+ * driver/regulator/tps6591x-regulator.c
+ *
+ * Regulator driver for TI TPS6591x PMIC family
+ *
+ * Copyright (C) 2011 NVIDIA Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/tps6591x.h>
+
+/* supply control and voltage setting  */
+#define TPS6591X_VIO_ADD               0x20
+#define TPS6591X_VDD1_ADD              0x21
+#define TPS6591X_VDD1_OP_ADD           0x22
+#define TPS6591X_VDD1_SR_ADD           0x23
+#define TPS6591X_VDD2_ADD              0x24
+#define TPS6591X_VDD2_OP_ADD           0x25
+#define TPS6591X_VDD2_SR_ADD           0x26
+#define TPS6591X_VDDCTRL_ADD           0x27
+#define TPS6591X_VDDCTRL_OP_ADD                0x28
+#define TPS6591X_VDDCTRL_SR_ADD                0x29
+#define TPS6591X_LDO1_ADD              0x30
+#define TPS6591X_LDO2_ADD              0x31
+#define TPS6591X_LDO3_ADD              0x37
+#define TPS6591X_LDO4_ADD              0x36
+#define TPS6591X_LDO5_ADD              0x32
+#define TPS6591X_LDO6_ADD              0x35
+#define TPS6591X_LDO7_ADD              0x34
+#define TPS6591X_LDO8_ADD              0x33
+#define TPS6591X_INVALID_ADD           0xFF
+
+struct tps6591x_register_info {
+       unsigned char addr;
+       unsigned char nbits;
+       unsigned char shift_bits;
+};
+
+enum {
+       supply_type_none = 0x0,
+       supply_type_single_reg,
+       supply_type_sr_op_reg
+};
+
+struct tps6591x_regulator {
+       struct regulator_desc desc;
+       int supply_type;
+
+       struct tps6591x_register_info supply_reg;
+       struct tps6591x_register_info op_reg;
+       struct tps6591x_register_info sr_reg;
+
+       int *voltages;
+};
+
+static inline struct device *to_tps6591x_dev(struct regulator_dev *rdev)
+{
+       return rdev_get_dev(rdev)->parent->parent;
+}
+
+static int __tps6591x_vio_set_voltage(struct device *parent,
+                                     struct tps6591x_regulator *ri,
+                                     int min_uV, int max_uV)
+{
+       int uV;
+       uint8_t mask;
+       uint8_t val;
+
+       for (val = 0; val < ri->desc.n_voltages; val++) {
+               uV = ri->voltages[val] * 1000;
+
+               /* use the first in-range value */
+               if (min_uV <= uV && uV <= max_uV) {
+
+                       val <<= ri->supply_reg.shift_bits;
+                       mask = ((1 << ri->supply_reg.nbits) - 1) <<
+                                       ri->supply_reg.shift_bits;
+
+                       return tps6591x_update(parent, ri->supply_reg.addr,
+                                       val, mask);
+               }
+       }
+
+       return -EINVAL;
+}
+
+static int tps6591x_vio_set_voltage(struct regulator_dev *rdev,
+                                   int min_uV, int max_uV)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+
+       return __tps6591x_vio_set_voltage(parent, ri, min_uV, max_uV);
+}
+
+static int tps6591x_vio_get_voltage(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+       uint8_t val, mask;
+       int ret;
+
+       ret = tps6591x_read(parent, ri->supply_reg.addr, &val);
+       if (ret)
+               return ret;
+
+       mask = ((1 << ri->supply_reg.nbits) - 1) << ri->supply_reg.shift_bits;
+       val = (val & mask) >> ri->supply_reg.shift_bits;
+
+       if (val >= ri->desc.n_voltages)
+               BUG();
+
+       return ri->voltages[val] * 1000;
+}
+
+
+static int tps6591x_ldo_list_voltage(struct regulator_dev *rdev,
+                                    unsigned selector)
+{
+       struct tps6591x_regulator *info = rdev_get_drvdata(rdev);
+
+       return info->voltages[selector] * 1000;
+}
+
+static int __tps6591x_ldo1_set_voltage(struct device *parent,
+                                     struct tps6591x_regulator *ri,
+                                     int min_uV, int max_uV)
+{
+       int val, uV;
+       uint8_t mask;
+
+       for (val = 0; val < ri->desc.n_voltages; val++) {
+               uV = ri->voltages[val] * 1000;
+
+               /* use the first in-range value */
+               if (min_uV <= uV && uV <= max_uV) {
+                       val += 4;
+                       val <<= ri->supply_reg.shift_bits;
+                       mask = ((1 << ri->supply_reg.nbits) - 1) <<
+                                       ri->supply_reg.shift_bits;
+
+                       return tps6591x_update(parent, ri->supply_reg.addr,
+                                       val, mask);
+               }
+       }
+
+       return -EINVAL;
+}
+
+static int tps6591x_ldo1_set_voltage(struct regulator_dev *rdev,
+                                   int min_uV, int max_uV)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+
+       return __tps6591x_ldo1_set_voltage(parent, ri, min_uV, max_uV);
+}
+
+static int tps6591x_ldo1_get_voltage(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+       uint8_t val, mask;
+       int ret;
+
+       ret = tps6591x_read(parent, ri->supply_reg.addr, &val);
+       if (ret)
+               return ret;
+
+       mask = ((1 << ri->supply_reg.nbits) - 1) << ri->supply_reg.shift_bits;
+       val = (val & mask) >> ri->supply_reg.shift_bits;
+
+       if (val < 4)
+               return 1000 * 1000;
+       else if (val > 0x32)
+               return 3300 * 1000;
+       else
+               val -= 4;
+       if (val >= ri->desc.n_voltages)
+               BUG();
+
+       return ri->voltages[val] * 1000;
+}
+
+static int __tps6591x_ldo3_set_voltage(struct device *parent,
+               struct tps6591x_regulator *ri, int min_uV, int max_uV)
+{
+       int val, uV;
+       uint8_t mask;
+
+       for (val = 0; val < ri->desc.n_voltages; val++) {
+               uV = ri->voltages[val] * 1000;
+
+               /* use the first in-range value */
+               if (min_uV <= uV && uV <= max_uV) {
+                       val += 2;
+                       val <<= ri->supply_reg.shift_bits;
+                       mask = ((1 << ri->supply_reg.nbits) - 1) <<
+                                               ri->supply_reg.shift_bits;
+
+                       return tps6591x_update(parent, ri->supply_reg.addr,
+                                       val, mask);
+               }
+       }
+
+       return -EINVAL;
+}
+
+static int tps6591x_ldo3_set_voltage(struct regulator_dev *rdev,
+                                   int min_uV, int max_uV)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+
+       return __tps6591x_ldo3_set_voltage(parent, ri, min_uV, max_uV);
+}
+
+static int tps6591x_ldo3_get_voltage(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+       uint8_t val, mask;
+       int ret;
+
+       ret = tps6591x_read(parent, ri->supply_reg.addr, &val);
+       if (ret)
+               return ret;
+
+       mask = ((1 << ri->supply_reg.nbits) - 1) << ri->supply_reg.shift_bits;
+       val = (val & mask) >> ri->supply_reg.shift_bits;
+
+       if (val < 2)
+               return 1000 * 1000;
+       else if (val > 0x19)
+               return 3300 * 1000;
+       else
+               val -= 2;
+       if (val >= ri->desc.n_voltages)
+               BUG();
+
+       return ri->voltages[val] * 1000;
+}
+
+static int __tps6591x_vdd_set_voltage(struct device *parent,
+                                     struct tps6591x_regulator *ri,
+                                     int min_uV, int max_uV)
+{
+       int val, uV, ret;
+       uint8_t mask, reg_val;
+
+       for (val = 0; val < ri->desc.n_voltages; val++) {
+               uV = ri->voltages[val] * 1000;
+
+               /* use the first in-range value */
+               if (min_uV <= uV && uV <= max_uV) {
+                       ret = tps6591x_read(parent, ri->op_reg.addr, &reg_val);
+                       if (ret)
+                               return ret;
+                       val += 3;
+                       if (reg_val & 0x80) {
+                               val <<= ri->sr_reg.shift_bits;
+                               mask = ((1 << ri->sr_reg.nbits) - 1)
+                                       << ri->sr_reg.shift_bits;
+                               return tps6591x_update(parent,
+                                       ri->sr_reg.addr, val, mask);
+                       } else {
+                               val <<= ri->op_reg.shift_bits;
+                               mask = ((1 << ri->op_reg.nbits) - 1)
+                                       << ri->op_reg.shift_bits;
+                               return tps6591x_update(parent,
+                                       ri->op_reg.addr, val, mask);
+                       }
+               }
+       }
+
+       return -EINVAL;
+}
+
+static int tps6591x_vdd_set_voltage(struct regulator_dev *rdev,
+                                   int min_uV, int max_uV)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+
+       return __tps6591x_vdd_set_voltage(parent, ri, min_uV, max_uV);
+}
+
+static int tps6591x_vdd_get_voltage(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+       uint8_t op_val, sr_val, val;
+       int ret;
+
+       ret = tps6591x_read(parent, ri->op_reg.addr, &op_val);
+       if (ret)
+               return ret;
+
+       ret = tps6591x_read(parent, ri->sr_reg.addr, &sr_val);
+       if (ret)
+               return ret;
+
+       val = (op_val & 0x80) ? (sr_val & 0x7F) : (op_val & 0x7F);
+
+       if (!val)
+               return 0;
+       else if (val < 0x3)
+               return 600 * 1000;
+       else if (val > 0x4B)
+               return 1500 * 1000;
+       else
+               val -= 3;
+
+       if (val >= ri->desc.n_voltages)
+               BUG();
+
+       return ri->voltages[val] * 1000;
+}
+
+static int tps6591x_regulator_enable(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+
+       return tps6591x_set_bits(parent, ri->supply_reg.addr, 0x1);
+}
+
+static int tps6591x_regulator_disable(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+
+       return tps6591x_clr_bits(parent, ri->supply_reg.addr, 0x1);
+}
+
+static int tps6591x_regulator_is_enabled(struct regulator_dev *rdev)
+{
+       struct tps6591x_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps6591x_dev(rdev);
+       uint8_t reg_val;
+       int ret;
+
+       ret = tps6591x_read(parent, ri->supply_reg.addr, &reg_val);
+       if (ret)
+               return ret;
+
+       return !!(reg_val & 0x1);
+}
+
+static struct regulator_ops tps6591x_regulator_vio_ops = {
+       .list_voltage = tps6591x_ldo_list_voltage,
+       .get_voltage = tps6591x_vio_get_voltage,
+       .set_voltage = tps6591x_vio_set_voltage,
+
+       .is_enabled = tps6591x_regulator_is_enabled,
+       .enable = tps6591x_regulator_enable,
+       .disable = tps6591x_regulator_disable,
+};
+
+static struct regulator_ops tps6591x_regulator_ldo1_ops = {
+       .list_voltage = tps6591x_ldo_list_voltage,
+       .get_voltage = tps6591x_ldo1_get_voltage,
+       .set_voltage = tps6591x_ldo1_set_voltage,
+
+       .is_enabled = tps6591x_regulator_is_enabled,
+       .enable = tps6591x_regulator_enable,
+       .disable = tps6591x_regulator_disable,
+};
+
+static struct regulator_ops tps6591x_regulator_ldo3_ops = {
+       .list_voltage = tps6591x_ldo_list_voltage,
+       .get_voltage = tps6591x_ldo3_get_voltage,
+       .set_voltage = tps6591x_ldo3_set_voltage,
+
+       .is_enabled = tps6591x_regulator_is_enabled,
+       .enable = tps6591x_regulator_enable,
+       .disable = tps6591x_regulator_disable,
+};
+
+static struct regulator_ops tps6591x_regulator_vdd_ops = {
+       .list_voltage = tps6591x_ldo_list_voltage,
+       .get_voltage = tps6591x_vdd_get_voltage,
+       .set_voltage = tps6591x_vdd_set_voltage,
+
+       .is_enabled = tps6591x_regulator_is_enabled,
+       .enable = tps6591x_regulator_enable,
+       .disable = tps6591x_regulator_disable,
+};
+
+static int tps6591x_vio_voltages[] = {
+       1500, 1800, 2500, 3300,
+};
+
+/* SEL[7:2]=000100:1000mV --> 110010:3300mV */
+static int tps6591x_ldo124_voltages[] = {
+       1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, 1400, 1450,
+       1500, 1550, 1600, 1650, 1700, 1750, 1800, 1850, 1900, 1950,
+       2000, 2050, 2100, 2150, 2200, 2250, 2300, 2350, 2400, 2450,
+       2500, 2550, 2600, 2650, 2700, 2750, 2800, 2850, 2900, 2950,
+       3000, 3050, 3100, 3150, 3200, 3250, 3300,
+};
+
+/* SEL[6:2]=00010:1000mv --> 11001:3300mV */
+static int tps6591x_ldo35678_voltages[] = {
+       1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900,
+       2000, 2100, 2200, 2300, 2400, 2500, 2600, 2700, 2800, 2900,
+       3000, 3100, 3200, 3300,
+};
+
+static int tps6591x_vdd_voltages[] = {
+       600, 612, 625, 637, 650, 662, 675, 687, 700, 712, 725, 737,
+       750, 762, 775, 787, 800, 812, 825, 837, 850, 862, 875, 887,
+       900, 912, 925, 937, 950, 962, 975, 987, 1000, 1012, 1025,
+       1037, 1050, 1062, 1075, 1087, 1100, 1112, 1125, 1137, 1150,
+       1162, 1175, 1187, 1200, 1212, 1225, 1237, 1250, 1262, 1275,
+       1287, 1300, 1312, 1325, 1337, 1350, 1362, 1375, 1387, 1400,
+       1412, 1425, 1437, 1450, 1462, 1475, 1487, 1500,
+};
+
+#define TPS6591X_REGULATOR(_id, vdata, _ops, s_addr, s_nbits, s_shift, \
+                       s_type, op_addr, op_nbits, op_shift, sr_addr,   \
+                       sr_nbits, sr_shift)                             \
+       .desc   = {                                                     \
+               .name   = tps6591x_rails(_id),                          \
+               .ops    = &tps6591x_regulator_##_ops,                   \
+               .type   = REGULATOR_VOLTAGE,                            \
+               .id     = TPS6591X_ID_##_id,                            \
+               .n_voltages = ARRAY_SIZE(tps6591x_##vdata##_voltages),  \
+               .owner  = THIS_MODULE,                                  \
+       },                                                              \
+       .supply_type    = supply_type_##s_type,                         \
+       .supply_reg     = {                                             \
+               .addr   = TPS6591X_##s_addr##_ADD,                      \
+               .nbits  = s_nbits,                                      \
+               .shift_bits = s_shift,                                  \
+       },                                                              \
+       .op_reg         = {                                             \
+               .addr   = TPS6591X_##op_addr##_ADD,                     \
+               .nbits  = op_nbits,                                     \
+               .shift_bits = op_shift,                                 \
+       },                                                              \
+       .sr_reg         = {                                             \
+               .addr   = TPS6591X_##sr_addr##_ADD,                     \
+               .nbits  = sr_nbits,                                     \
+               .shift_bits = sr_shift,                                 \
+       },                                                              \
+       .voltages       = tps6591x_##vdata##_voltages,
+
+#define TPS6591X_VIO(_id, vdata, s_addr, s_nbits, s_shift, s_type)     \
+{                                                                      \
+       TPS6591X_REGULATOR(_id, vdata, vio_ops, s_addr, s_nbits,        \
+                       s_shift, s_type, INVALID, 0, 0, INVALID, 0, 0)  \
+}
+
+#define TPS6591X_LDO1(_id, vdata, s_addr, s_nbits, s_shift, s_type)    \
+{                                                                      \
+       TPS6591X_REGULATOR(_id, vdata, ldo1_ops, s_addr, s_nbits,       \
+                       s_shift, s_type, INVALID, 0, 0, INVALID, 0, 0)  \
+}
+
+#define TPS6591X_LDO3(_id, vdata, s_addr, s_nbits, s_shift, s_type)    \
+{                                                                      \
+       TPS6591X_REGULATOR(_id, vdata, ldo3_ops, s_addr, s_nbits,       \
+                       s_shift, s_type, INVALID, 0, 0, INVALID, 0, 0)  \
+}
+
+#define TPS6591X_VDD(_id, vdata, s_addr, s_nbits, s_shift, s_type,     \
+                       op_addr, op_nbits, op_shift, sr_addr, sr_nbits, \
+                       sr_shift)                                       \
+{                                                                      \
+       TPS6591X_REGULATOR(_id, vdata, vdd_ops, s_addr, s_nbits,        \
+                       s_shift, s_type, op_addr, op_nbits, op_shift,   \
+                       sr_addr, sr_nbits, sr_shift)                    \
+}
+
+static struct tps6591x_regulator tps6591x_regulator[] = {
+       TPS6591X_VIO(VIO, vio, VIO, 2, 2, single_reg),
+       TPS6591X_LDO1(LDO_1, ldo124, LDO1, 6, 2, single_reg),
+       TPS6591X_LDO1(LDO_2, ldo124, LDO2, 6, 2, single_reg),
+       TPS6591X_LDO3(LDO_3, ldo35678, LDO3, 5, 2, single_reg),
+       TPS6591X_LDO1(LDO_4, ldo124, LDO4, 6, 2, single_reg),
+       TPS6591X_LDO3(LDO_5, ldo35678, LDO5, 5, 2, single_reg),
+       TPS6591X_LDO3(LDO_6, ldo35678, LDO6, 5, 2, single_reg),
+       TPS6591X_LDO3(LDO_7, ldo35678, LDO7, 5, 2, single_reg),
+       TPS6591X_LDO3(LDO_8, ldo35678, LDO8, 5, 2, single_reg),
+       TPS6591X_VDD(VDD_1, vdd, VDD1, 2, 0, sr_op_reg, VDD1_OP,
+               7, 0, VDD1_SR, 7, 0),
+       TPS6591X_VDD(VDD_2, vdd, VDD2, 2, 0, sr_op_reg, VDD2_OP,
+               7, 0, VDD2_SR, 7, 0),
+       TPS6591X_VDD(VDDCTRL, vdd, VDDCTRL, 2, 0, sr_op_reg,
+               VDDCTRL_OP, 7, 0, VDDCTRL_SR, 7, 0),
+};
+
+static inline int tps6591x_regulator_preinit(struct device *parent,
+                                            struct tps6591x_regulator *ri)
+{
+       return tps6591x_set_bits(parent, ri->supply_reg.addr, 0x1);
+}
+
+static inline struct tps6591x_regulator *find_regulator_info(int id)
+{
+       struct tps6591x_regulator *ri;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(tps6591x_regulator); i++) {
+               ri = &tps6591x_regulator[i];
+               if (ri->desc.id == id)
+                       return ri;
+       }
+       return NULL;
+}
+
+static int __devinit tps6591x_regulator_probe(struct platform_device *pdev)
+{
+       struct tps6591x_regulator *ri = NULL;
+       struct regulator_dev *rdev;
+       int id = pdev->id;
+       int err;
+
+       dev_dbg(&pdev->dev, "Probing reulator %d\n", id);
+
+       ri = find_regulator_info(id);
+       if (ri == NULL) {
+               dev_err(&pdev->dev, "invalid regulator ID specified\n");
+               return -EINVAL;
+       }
+
+       err = tps6591x_regulator_preinit(pdev->dev.parent, ri);
+       if (err)
+               return err;
+
+       rdev = regulator_register(&ri->desc, &pdev->dev,
+                                 pdev->dev.platform_data, ri);
+       if (IS_ERR_OR_NULL(rdev)) {
+               dev_err(&pdev->dev, "failed to register regulator %s\n",
+                               ri->desc.name);
+               return PTR_ERR(rdev);
+       }
+
+       platform_set_drvdata(pdev, rdev);
+
+       return 0;
+}
+
+static int __devexit tps6591x_regulator_remove(struct platform_device *pdev)
+{
+       struct regulator_dev *rdev = platform_get_drvdata(pdev);
+
+       regulator_unregister(rdev);
+       return 0;
+}
+
+static struct platform_driver tps6591x_regulator_driver = {
+       .driver = {
+               .name   = "tps6591x-regulator",
+               .owner  = THIS_MODULE,
+       },
+       .probe          = tps6591x_regulator_probe,
+       .remove         = __devexit_p(tps6591x_regulator_remove),
+};
+
+static int __init tps6591x_regulator_init(void)
+{
+       return platform_driver_register(&tps6591x_regulator_driver);
+}
+subsys_initcall(tps6591x_regulator_init);
+
+static void __exit tps6591x_regulator_exit(void)
+{
+       platform_driver_unregister(&tps6591x_regulator_driver);
+}
+module_exit(tps6591x_regulator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Regulator Driver for TI TPS6591X PMIC");
+MODULE_ALIAS("platform:tps6591x-regulator");