tps65912: add regulator driver

The tps65912 consist of 4 DCDCs and 10 LDOs. The output voltages can be
configured by the SPI or I2C interface, they are meant to supply power
to the main processor and other components.

Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

3 files changed, 807 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 118eb213eb3a..13722a7e7abd 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -249,6 +249,12 @@ config REGULATOR_TPS6507X
           three step-down converters and two general-purpose LDO voltage regulators.
           It supports TI's software based Class-2 SmartReflex implementation.
 
+config REGULATOR_TPS65912
+        tristate "TI TPS65912 Power regulator"
+        depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
+        help
+            This driver supports TPS65912 voltage regulator chip.
+
 config REGULATOR_88PM8607
         bool "Marvell 88PM8607 Power regulators"
         depends on MFD_88PM860X=y
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 3932d2ec38f3..87ba2fd1dbcb 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
 obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
 obj-$(CONFIG_REGULATOR_AB8500)  += ab8500.o
diff --git a/drivers/regulator/tps65912-regulator.c b/drivers/regulator/tps65912-regulator.c
new file mode 100644
index 000000000000..d2c6542776f1
--- /dev/null
+++ b/drivers/regulator/tps65912-regulator.c
@@ -0,0 +1,800 @@
+/*
+ * tps65912.c  --  TI tps65912
+ *
+ * Copyright 2011 Texas Instruments Inc.
+ *
+ * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
+ *
+ *  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 driver is based on wm8350 implementation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/mfd/tps65912.h>
+
+/* DCDC's */
+#define TPS65912_REG_DCDC1      0
+#define TPS65912_REG_DCDC2      1
+#define TPS65912_REG_DCDC3      2
+#define TPS65912_REG_DCDC4      3
+
+/* LDOs */
+#define TPS65912_REG_LDO1       4
+#define TPS65912_REG_LDO2       5
+#define TPS65912_REG_LDO3       6
+#define TPS65912_REG_LDO4       7
+#define TPS65912_REG_LDO5       8
+#define TPS65912_REG_LDO6       9
+#define TPS65912_REG_LDO7       10
+#define TPS65912_REG_LDO8       11
+#define TPS65912_REG_LDO9       12
+#define TPS65912_REG_LDO10      13
+
+#define TPS65912_MAX_REG_ID     TPS65912_REG_LDO_10
+
+/* Number of step-down converters available */
+#define TPS65912_NUM_DCDC       4
+
+/* Number of LDO voltage regulators  available */
+#define TPS65912_NUM_LDO        10
+
+/* Number of total regulators available */
+#define TPS65912_NUM_REGULATOR          (TPS65912_NUM_DCDC + TPS65912_NUM_LDO)
+
+#define TPS65912_REG_ENABLED    0x80
+#define OP_SELREG_MASK          0x40
+#define OP_SELREG_SHIFT         6
+
+struct tps_info {
+        const char *name;
+};
+
+static struct tps_info tps65912_regs[] = {
+        {
+                .name = "DCDC1",
+        },
+        {
+                .name = "DCDC2",
+        },
+        {
+                .name = "DCDC3",
+        },
+        {
+                .name = "DCDC4",
+        },
+        {
+                .name = "LDO1",
+        },
+        {
+                .name = "LDO2",
+        },
+        {
+                .name = "LDO3",
+        },
+        {
+                .name = "LDO4",
+        },
+        {
+                .name = "LDO5",
+        },
+        {
+                .name = "LDO6",
+        },
+        {
+                .name = "LDO7",
+        },
+        {
+                .name = "LDO8",
+        },
+        {
+                .name = "LDO9",
+        },
+        {
+                .name = "LDO10",
+        },
+};
+
+struct tps65912_reg {
+        struct regulator_desc desc[TPS65912_NUM_REGULATOR];
+        struct tps65912 *mfd;
+        struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
+        struct tps_info *info[TPS65912_NUM_REGULATOR];
+        /* for read/write access */
+        struct mutex io_lock;
+        int mode;
+        int (*get_ctrl_reg)(int);
+        int dcdc1_range;
+        int dcdc2_range;
+        int dcdc3_range;
+        int dcdc4_range;
+        int pwm_mode_reg;
+        int eco_reg;
+};
+
+static int tps65912_get_range(struct tps65912_reg *pmic, int id)
+{
+        struct tps65912 *mfd = pmic->mfd;
+
+        if (id > TPS65912_REG_DCDC4)
+                return 0;
+
+        switch (id) {
+        case TPS65912_REG_DCDC1:
+                pmic->dcdc1_range = tps65912_reg_read(mfd,
+                                                        TPS65912_DCDC1_LIMIT);
+                if (pmic->dcdc1_range < 0)
+                        return pmic->dcdc1_range;
+                pmic->dcdc1_range = (pmic->dcdc1_range &
+                        DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
+                return pmic->dcdc1_range;
+        case TPS65912_REG_DCDC2:
+                pmic->dcdc2_range = tps65912_reg_read(mfd,
+                                                        TPS65912_DCDC2_LIMIT);
+                if (pmic->dcdc2_range < 0)
+                        return pmic->dcdc2_range;
+                pmic->dcdc2_range = (pmic->dcdc2_range &
+                        DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
+                return pmic->dcdc2_range;
+        case TPS65912_REG_DCDC3:
+                pmic->dcdc3_range = tps65912_reg_read(mfd,
+                                                        TPS65912_DCDC3_LIMIT);
+                if (pmic->dcdc3_range < 0)
+                        return pmic->dcdc3_range;
+                pmic->dcdc3_range = (pmic->dcdc3_range &
+                        DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
+                return pmic->dcdc3_range;
+        case TPS65912_REG_DCDC4:
+                pmic->dcdc4_range = tps65912_reg_read(mfd,
+                                                        TPS65912_DCDC4_LIMIT);
+                if (pmic->dcdc4_range < 0)
+                        return pmic->dcdc4_range;
+                pmic->dcdc4_range = (pmic->dcdc4_range &
+                        DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
+                return pmic->dcdc4_range;
+        default:
+                return 0;
+        }
+}
+
+static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
+{
+        unsigned long uv;
+
+        uv = ((vsel * 12500) + 500000);
+        return uv;
+}
+
+static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
+{
+        unsigned long uv;
+
+         uv = ((vsel * 12500) + 700000);
+        return uv;
+}
+
+static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
+{
+        unsigned long uv;
+
+        uv = ((vsel * 25000) + 500000);
+        return uv;
+}
+
+static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
+{
+        unsigned long uv;
+
+        if (vsel == 0x3f)
+                uv = 3800000;
+        else
+                uv = ((vsel * 50000) + 500000);
+
+        return uv;
+}
+
+static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel)
+{
+        unsigned long uv = 0;
+
+        if (vsel <= 32)
+                uv = ((vsel * 25000) + 800000);
+        else if (vsel > 32 && vsel <= 60)
+                uv = (((vsel - 32) * 50000) + 1600000);
+        else if (vsel > 60)
+                uv = (((vsel - 60) * 100000) + 3000000);
+
+        return uv;
+}
+
+static int tps65912_get_ctrl_register(int id)
+{
+        switch (id) {
+        case TPS65912_REG_DCDC1:
+                return TPS65912_DCDC1_AVS;
+        case TPS65912_REG_DCDC2:
+                return TPS65912_DCDC2_AVS;
+        case TPS65912_REG_DCDC3:
+                return TPS65912_DCDC3_AVS;
+        case TPS65912_REG_DCDC4:
+                return TPS65912_DCDC4_AVS;
+        case TPS65912_REG_LDO1:
+                return TPS65912_LDO1_AVS;
+        case TPS65912_REG_LDO2:
+                return TPS65912_LDO2_AVS;
+        case TPS65912_REG_LDO3:
+                return TPS65912_LDO3_AVS;
+        case TPS65912_REG_LDO4:
+                return TPS65912_LDO4_AVS;
+        case TPS65912_REG_LDO5:
+                return TPS65912_LDO5;
+        case TPS65912_REG_LDO6:
+                return TPS65912_LDO6;
+        case TPS65912_REG_LDO7:
+                return TPS65912_LDO7;
+        case TPS65912_REG_LDO8:
+                return TPS65912_LDO8;
+        case TPS65912_REG_LDO9:
+                return TPS65912_LDO9;
+        case TPS65912_REG_LDO10:
+                return TPS65912_LDO10;
+        default:
+                return -EINVAL;
+        }
+}
+
+static int tps65912_get_dcdc_sel_register(struct tps65912_reg *pmic, int id)
+{
+        struct tps65912 *mfd = pmic->mfd;
+        int opvsel = 0, sr = 0;
+        u8 reg = 0;
+
+        if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_DCDC4)
+                return -EINVAL;
+
+        switch (id) {
+        case TPS65912_REG_DCDC1:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP);
+                sr = ((opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT);
+                if (sr)
+                        reg = TPS65912_DCDC1_AVS;
+                else
+                        reg = TPS65912_DCDC1_OP;
+                break;
+        case TPS65912_REG_DCDC2:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_DCDC2_AVS;
+                else
+                        reg = TPS65912_DCDC2_OP;
+                break;
+        case TPS65912_REG_DCDC3:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_DCDC3_AVS;
+                else
+                        reg = TPS65912_DCDC3_OP;
+                break;
+        case TPS65912_REG_DCDC4:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_DCDC4_AVS;
+                else
+                        reg = TPS65912_DCDC4_OP;
+                break;
+        }
+        return reg;
+}
+
+static int tps65912_get_ldo_sel_register(struct tps65912_reg *pmic, int id)
+{
+        struct tps65912 *mfd = pmic->mfd;
+        int opvsel = 0, sr = 0;
+        u8 reg = 0;
+
+        if (id < TPS65912_REG_LDO1 || id > TPS65912_REG_LDO10)
+                return -EINVAL;
+
+        switch (id) {
+        case TPS65912_REG_LDO1:
+                opvsel = tps65912_reg_read(mfd, TPS65912_LDO1_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_LDO1_AVS;
+                else
+                        reg = TPS65912_LDO1_OP;
+                break;
+        case TPS65912_REG_LDO2:
+                opvsel = tps65912_reg_read(mfd, TPS65912_LDO2_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_LDO2_AVS;
+                else
+                        reg = TPS65912_LDO2_OP;
+                break;
+        case TPS65912_REG_LDO3:
+                opvsel = tps65912_reg_read(mfd, TPS65912_LDO3_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_LDO3_AVS;
+                else
+                        reg = TPS65912_LDO3_OP;
+                break;
+        case TPS65912_REG_LDO4:
+                opvsel = tps65912_reg_read(mfd, TPS65912_LDO4_OP);
+                sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+                if (sr)
+                        reg = TPS65912_LDO4_AVS;
+                else
+                        reg = TPS65912_LDO4_OP;
+                break;
+        case TPS65912_REG_LDO5:
+                reg = TPS65912_LDO5;
+                break;
+        case TPS65912_REG_LDO6:
+                reg = TPS65912_LDO6;
+                break;
+        case TPS65912_REG_LDO7:
+                reg = TPS65912_LDO7;
+                break;
+        case TPS65912_REG_LDO8:
+                reg = TPS65912_LDO8;
+                break;
+        case TPS65912_REG_LDO9:
+                reg = TPS65912_LDO9;
+                break;
+        case TPS65912_REG_LDO10:
+                reg = TPS65912_LDO10;
+                break;
+        }
+
+        return reg;
+}
+
+static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
+{
+        switch (id) {
+        case TPS65912_REG_DCDC1:
+                pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
+                pmic->eco_reg = TPS65912_DCDC1_AVS;
+                break;
+        case TPS65912_REG_DCDC2:
+                pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
+                pmic->eco_reg = TPS65912_DCDC2_AVS;
+                break;
+        case TPS65912_REG_DCDC3:
+                pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
+                pmic->eco_reg = TPS65912_DCDC3_AVS;
+                break;
+        case TPS65912_REG_DCDC4:
+                pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
+                pmic->eco_reg = TPS65912_DCDC4_AVS;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static int tps65912_reg_is_enabled(struct regulator_dev *dev)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int reg, value, id = rdev_get_id(dev);
+
+        if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
+                return -EINVAL;
+
+        reg = pmic->get_ctrl_reg(id);
+        if (reg < 0)
+                return reg;
+
+        value = tps65912_reg_read(mfd, reg);
+        if (value < 0)
+                return value;
+
+        return value & TPS65912_REG_ENABLED;
+}
+
+static int tps65912_reg_enable(struct regulator_dev *dev)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int id = rdev_get_id(dev);
+        u8 reg;
+
+        if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
+                return -EINVAL;
+
+        reg = pmic->get_ctrl_reg(id);
+        if (reg < 0)
+                return reg;
+
+        return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
+}
+
+static int tps65912_reg_disable(struct regulator_dev *dev)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int id = rdev_get_id(dev), reg;
+
+        reg = pmic->get_ctrl_reg(id);
+        if (reg < 0)
+                return reg;
+
+        return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
+}
+
+static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int pwm_mode, eco, id = rdev_get_id(dev);
+
+        tps65912_get_mode_regiters(pmic, id);
+
+        pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
+        eco = tps65912_reg_read(mfd, pmic->eco_reg);
+
+        pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
+        eco &= DCDC_AVS_ECO_MASK;
+
+        switch (mode) {
+        case REGULATOR_MODE_FAST:
+                /* Verify if mode alredy set */
+                if (pwm_mode && !eco)
+                        break;
+                tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
+                tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
+                break;
+        case REGULATOR_MODE_NORMAL:
+        case REGULATOR_MODE_IDLE:
+                if (!pwm_mode && !eco)
+                        break;
+                tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
+                tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
+                break;
+        case REGULATOR_MODE_STANDBY:
+                if (!pwm_mode && eco)
+                        break;
+                tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
+                tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static unsigned int tps65912_get_mode(struct regulator_dev *dev)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
+
+        tps65912_get_mode_regiters(pmic, id);
+
+        pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
+        eco = tps65912_reg_read(mfd, pmic->eco_reg);
+
+        pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
+        eco &= DCDC_AVS_ECO_MASK;
+
+        if (pwm_mode && !eco)
+                mode = REGULATOR_MODE_FAST;
+        else if (!pwm_mode && !eco)
+                mode = REGULATOR_MODE_NORMAL;
+        else if (!pwm_mode && eco)
+                mode = REGULATOR_MODE_STANDBY;
+
+        return mode;
+}
+
+static int tps65912_get_voltage_dcdc(struct regulator_dev *dev)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int id = rdev_get_id(dev), voltage = 0, range;
+        int opvsel = 0, avsel = 0, sr, vsel;
+
+        switch (id) {
+        case TPS65912_REG_DCDC1:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP);
+                avsel = tps65912_reg_read(mfd, TPS65912_DCDC1_AVS);
+                range = pmic->dcdc1_range;
+                break;
+        case TPS65912_REG_DCDC2:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP);
+                avsel = tps65912_reg_read(mfd, TPS65912_DCDC2_AVS);
+                range = pmic->dcdc2_range;
+                break;
+        case TPS65912_REG_DCDC3:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP);
+                avsel = tps65912_reg_read(mfd, TPS65912_DCDC3_AVS);
+                range = pmic->dcdc3_range;
+                break;
+        case TPS65912_REG_DCDC4:
+                opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP);
+                avsel = tps65912_reg_read(mfd, TPS65912_DCDC4_AVS);
+                range = pmic->dcdc4_range;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
+        if (sr)
+                vsel = avsel;
+        else
+                vsel = opvsel;
+        vsel &= 0x3F;
+
+        switch (range) {
+        case 0:
+                /* 0.5 - 1.2875V in 12.5mV steps */
+                voltage = tps65912_vsel_to_uv_range0(vsel);
+                break;
+        case 1:
+                /* 0.7 - 1.4875V in 12.5mV steps */
+                voltage = tps65912_vsel_to_uv_range1(vsel);
+                break;
+        case 2:
+                /* 0.5 - 2.075V in 25mV steps */
+                voltage = tps65912_vsel_to_uv_range2(vsel);
+                break;
+        case 3:
+                /* 0.5 - 3.8V in 50mV steps */
+                voltage = tps65912_vsel_to_uv_range3(vsel);
+                break;
+        }
+        return voltage;
+}
+
+static int tps65912_set_voltage_dcdc(struct regulator_dev *dev,
+                                                unsigned selector)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int id = rdev_get_id(dev);
+        int value;
+        u8 reg;
+
+        reg = tps65912_get_dcdc_sel_register(pmic, id);
+        value = tps65912_reg_read(mfd, reg);
+        value &= 0xC0;
+        return tps65912_reg_write(mfd, reg, selector | value);
+}
+
+static int tps65912_get_voltage_ldo(struct regulator_dev *dev)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int id = rdev_get_id(dev);
+        int vsel = 0;
+        u8 reg;
+
+        reg = tps65912_get_ldo_sel_register(pmic, id);
+        vsel = tps65912_reg_read(mfd, reg);
+        vsel &= 0x3F;
+
+        return tps65912_vsel_to_uv_ldo(vsel);
+}
+
+static int tps65912_set_voltage_ldo(struct regulator_dev *dev,
+                                                unsigned selector)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        struct tps65912 *mfd = pmic->mfd;
+        int id = rdev_get_id(dev), reg, value;
+
+        reg = tps65912_get_ldo_sel_register(pmic, id);
+        value = tps65912_reg_read(mfd, reg);
+        value &= 0xC0;
+        return tps65912_reg_write(mfd, reg, selector | value);
+}
+
+static int tps65912_list_voltage_dcdc(struct regulator_dev *dev,
+                                        unsigned selector)
+{
+        struct tps65912_reg *pmic = rdev_get_drvdata(dev);
+        int range, voltage = 0, id = rdev_get_id(dev);
+
+        switch (id) {
+        case TPS65912_REG_DCDC1:
+                range = pmic->dcdc1_range;
+                break;
+        case TPS65912_REG_DCDC2:
+                range = pmic->dcdc2_range;
+                break;
+        case TPS65912_REG_DCDC3:
+                range = pmic->dcdc3_range;
+                break;
+        case TPS65912_REG_DCDC4:
+                range = pmic->dcdc4_range;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        switch (range) {
+        case 0:
+                /* 0.5 - 1.2875V in 12.5mV steps */
+                voltage = tps65912_vsel_to_uv_range0(selector);
+                break;
+        case 1:
+                /* 0.7 - 1.4875V in 12.5mV steps */
+                voltage = tps65912_vsel_to_uv_range1(selector);
+                break;
+        case 2:
+                /* 0.5 - 2.075V in 25mV steps */
+                voltage = tps65912_vsel_to_uv_range2(selector);
+                break;
+        case 3:
+                /* 0.5 - 3.8V in 50mV steps */
+                voltage = tps65912_vsel_to_uv_range3(selector);
+                break;
+        }
+        return voltage;
+}
+
+static int tps65912_list_voltage_ldo(struct regulator_dev *dev,
+                                        unsigned selector)
+{
+        int ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65912_REG_LDO1 || ldo > TPS65912_REG_LDO10)
+                return -EINVAL;
+
+        return tps65912_vsel_to_uv_ldo(selector);
+}
+
+/* Operations permitted on DCDCx */
+static struct regulator_ops tps65912_ops_dcdc = {
+        .is_enabled = tps65912_reg_is_enabled,
+        .enable = tps65912_reg_enable,
+        .disable = tps65912_reg_disable,
+        .set_mode = tps65912_set_mode,
+        .get_mode = tps65912_get_mode,
+        .get_voltage = tps65912_get_voltage_dcdc,
+        .set_voltage_sel = tps65912_set_voltage_dcdc,
+        .list_voltage = tps65912_list_voltage_dcdc,
+};
+
+/* Operations permitted on LDOx */
+static struct regulator_ops tps65912_ops_ldo = {
+        .is_enabled = tps65912_reg_is_enabled,
+        .enable = tps65912_reg_enable,
+        .disable = tps65912_reg_disable,
+        .get_voltage = tps65912_get_voltage_ldo,
+        .set_voltage_sel = tps65912_set_voltage_ldo,
+        .list_voltage = tps65912_list_voltage_ldo,
+};
+
+static __devinit int tps65912_probe(struct platform_device *pdev)
+{
+        struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
+        struct tps_info *info;
+        struct regulator_init_data *reg_data;
+        struct regulator_dev *rdev;
+        struct tps65912_reg *pmic;
+        struct tps65912_board *pmic_plat_data;
+        int i, err;
+
+        pmic_plat_data = dev_get_platdata(tps65912->dev);
+        if (!pmic_plat_data)
+                return -EINVAL;
+
+        reg_data = pmic_plat_data->tps65912_pmic_init_data;
+
+        pmic = kzalloc(sizeof(*pmic), GFP_KERNEL);
+        if (!pmic)
+                return -ENOMEM;
+
+        mutex_init(&pmic->io_lock);
+        pmic->mfd = tps65912;
+        platform_set_drvdata(pdev, pmic);
+
+        pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
+        info = tps65912_regs;
+
+        for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
+                int range = 0;
+                /* Register the regulators */
+                pmic->info[i] = info;
+
+                pmic->desc[i].name = info->name;
+                pmic->desc[i].id = i;
+                pmic->desc[i].n_voltages = 64;
+                pmic->desc[i].ops = (i > TPS65912_REG_DCDC4 ?
+                        &tps65912_ops_ldo : &tps65912_ops_dcdc);
+                pmic->desc[i].type = REGULATOR_VOLTAGE;
+                pmic->desc[i].owner = THIS_MODULE;
+                range = tps65912_get_range(pmic, i);
+                rdev = regulator_register(&pmic->desc[i],
+                                        tps65912->dev, reg_data, pmic);
+                if (IS_ERR(rdev)) {
+                        dev_err(tps65912->dev,
+                                "failed to register %s regulator\n",
+                                pdev->name);
+                        err = PTR_ERR(rdev);
+                        goto err;
+                }
+
+                /* Save regulator for cleanup */
+                pmic->rdev[i] = rdev;
+        }
+        return 0;
+
+err:
+        while (--i >= 0)
+                regulator_unregister(pmic->rdev[i]);
+
+        kfree(pmic);
+        return err;
+}
+
+static int __devexit tps65912_remove(struct platform_device *pdev)
+{
+        struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev);
+        int i;
+
+        for (i = 0; i < TPS65912_NUM_REGULATOR; i++)
+                regulator_unregister(tps65912_reg->rdev[i]);
+
+        kfree(tps65912_reg);
+        return 0;
+}
+
+static struct platform_driver tps65912_driver = {
+        .driver = {
+                .name = "tps65912-pmic",
+                .owner = THIS_MODULE,
+        },
+        .probe = tps65912_probe,
+        .remove = __devexit_p(tps65912_remove),
+};
+
+/**
+ * tps65912_init
+ *
+ * Module init function
+ */
+static int __init tps65912_init(void)
+{
+        return platform_driver_register(&tps65912_driver);
+}
+subsys_initcall(tps65912_init);
+
+/**
+ * tps65912_cleanup
+ *
+ * Module exit function
+ */
+static void __exit tps65912_cleanup(void)
+{
+        platform_driver_unregister(&tps65912_driver);
+}
+module_exit(tps65912_cleanup);
+
+MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
+MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tps65912-pmic");