/* * tps80031-regulator.c -- TI TPS80031 regulator driver. * * Regulator driver for TI TPS80031/TPS80032 Fully Integrated Power * Management with Power Path and Battery Charger. * * Copyright (c) 2012, NVIDIA Corporation. * * Author: Laxman Dewangan <ldewangan@nvidia.com> * * 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 version 2. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, * whether express or implied; 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., 59 Temple Place, Suite 330, Boston, MA * 02111-1307, USA */ #include <linux/delay.h> #include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/mfd/tps80031.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/slab.h> /* Flags for DCDC Voltage reading */ #define DCDC_OFFSET_EN BIT(0) #define DCDC_EXTENDED_EN BIT(1) #define TRACK_MODE_ENABLE BIT(2) #define SMPS_MULTOFFSET_VIO BIT(1) #define SMPS_MULTOFFSET_SMPS1 BIT(3) #define SMPS_MULTOFFSET_SMPS2 BIT(4) #define SMPS_MULTOFFSET_SMPS3 BIT(6) #define SMPS_MULTOFFSET_SMPS4 BIT(0) #define SMPS_CMD_MASK 0xC0 #define SMPS_VSEL_MASK 0x3F #define LDO_VSEL_MASK 0x1F #define LDO_TRACK_VSEL_MASK 0x3F #define MISC2_LDOUSB_IN_VSYS BIT(4) #define MISC2_LDOUSB_IN_PMID BIT(3) #define MISC2_LDOUSB_IN_MASK 0x18 #define MISC2_LDO3_SEL_VIB_VAL BIT(0) #define MISC2_LDO3_SEL_VIB_MASK 0x1 #define BOOST_HW_PWR_EN BIT(5) #define BOOST_HW_PWR_EN_MASK BIT(5) #define OPA_MODE_EN BIT(6) #define OPA_MODE_EN_MASK BIT(6) #define USB_VBUS_CTRL_SET 0x04 #define USB_VBUS_CTRL_CLR 0x05 #define VBUS_DISCHRG 0x20 struct tps80031_regulator_info { /* Regulator register address.*/ u8 trans_reg; u8 state_reg; u8 force_reg; u8 volt_reg; u8 volt_id; /*Power request bits */ int preq_bit; /* used by regulator core */ struct regulator_desc desc; }; struct tps80031_regulator { struct device *dev; struct regulator_dev *rdev; struct tps80031_regulator_info *rinfo; u8 device_flags; unsigned int config_flags; unsigned int ext_ctrl_flag; }; static inline struct device *to_tps80031_dev(struct regulator_dev *rdev) { return rdev_get_dev(rdev)->parent->parent; } static int tps80031_reg_is_enabled(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); u8 reg_val; int ret; if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ) return true; ret = tps80031_read(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg, ®_val); if (ret < 0) { dev_err(&rdev->dev, "Reg 0x%02x read failed, err = %d\n", ri->rinfo->state_reg, ret); return ret; } return ((reg_val & TPS80031_STATE_MASK) == TPS80031_STATE_ON); } static int tps80031_reg_enable(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); int ret; if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ) return 0; ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg, TPS80031_STATE_ON, TPS80031_STATE_MASK); if (ret < 0) { dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n", ri->rinfo->state_reg, ret); return ret; } return ret; } static int tps80031_reg_disable(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); int ret; if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ) return 0; ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg, TPS80031_STATE_OFF, TPS80031_STATE_MASK); if (ret < 0) dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n", ri->rinfo->state_reg, ret); return ret; } /* DCDC voltages for the selector of 58 to 63 */ static int tps80031_dcdc_voltages[4][5] = { { 1350, 1500, 1800, 1900, 2100}, { 1350, 1500, 1800, 1900, 2100}, { 2084, 2315, 2778, 2932, 3241}, { 4167, 2315, 2778, 2932, 3241}, }; static int tps80031_dcdc_list_voltage(struct regulator_dev *rdev, unsigned sel) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); int volt_index = ri->device_flags & 0x3; if (sel == 0) return 0; else if (sel < 58) return regulator_list_voltage_linear(rdev, sel - 1); else return tps80031_dcdc_voltages[volt_index][sel - 58] * 1000; } static int tps80031_dcdc_set_voltage_sel(struct regulator_dev *rdev, unsigned vsel) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); int ret; u8 reg_val; if (ri->rinfo->force_reg) { ret = tps80031_read(parent, ri->rinfo->volt_id, ri->rinfo->force_reg, ®_val); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", ri->rinfo->force_reg, ret); return ret; } if (!(reg_val & SMPS_CMD_MASK)) { ret = tps80031_update(parent, ri->rinfo->volt_id, ri->rinfo->force_reg, vsel, SMPS_VSEL_MASK); if (ret < 0) dev_err(ri->dev, "reg 0x%02x update failed, e = %d\n", ri->rinfo->force_reg, ret); return ret; } } ret = tps80031_update(parent, ri->rinfo->volt_id, ri->rinfo->volt_reg, vsel, SMPS_VSEL_MASK); if (ret < 0) dev_err(ri->dev, "reg 0x%02x update failed, e = %d\n", ri->rinfo->volt_reg, ret); return ret; } static int tps80031_dcdc_get_voltage_sel(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); uint8_t vsel = 0; int ret; if (ri->rinfo->force_reg) { ret = tps80031_read(parent, ri->rinfo->volt_id, ri->rinfo->force_reg, &vsel); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", ri->rinfo->force_reg, ret); return ret; } if (!(vsel & SMPS_CMD_MASK)) return vsel & SMPS_VSEL_MASK; } ret = tps80031_read(parent, ri->rinfo->volt_id, ri->rinfo->volt_reg, &vsel); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", ri->rinfo->volt_reg, ret); return ret; } return vsel & SMPS_VSEL_MASK; } static int tps80031_ldo_list_voltage(struct regulator_dev *rdev, unsigned int sel) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */ if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) && (ri->device_flags & TRACK_MODE_ENABLE)) { unsigned nvsel = (sel) & 0x1F; if (((tps80031_get_chip_info(parent) == TPS80031) || ((tps80031_get_chip_info(parent) == TPS80032) && (tps80031_get_pmu_version(parent) == 0x0))) && ((nvsel == 0x0) || (nvsel >= 0x19 && nvsel <= 0x1F))) { dev_err(ri->dev, "Invalid sel %d in track mode LDO2\n", nvsel); return -EINVAL; } } return regulator_list_voltage_linear(rdev, sel); } static int tps80031_ldo_map_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */ if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) && (ri->device_flags & TRACK_MODE_ENABLE)) { if (((tps80031_get_chip_info(parent) == TPS80031) || ((tps80031_get_chip_info(parent) == TPS80032) && (tps80031_get_pmu_version(parent) == 0x0)))) { return regulator_map_voltage_iterate(rdev, min_uV, max_uV); } } return regulator_map_voltage_linear(rdev, min_uV, max_uV); } static int tps80031_vbus_is_enabled(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); int ret = -EIO; uint8_t ctrl1 = 0; uint8_t ctrl3 = 0; ret = tps80031_read(parent, TPS80031_SLAVE_ID2, TPS80031_CHARGERUSB_CTRL1, &ctrl1); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", TPS80031_CHARGERUSB_CTRL1, ret); return ret; } ret = tps80031_read(parent, TPS80031_SLAVE_ID2, TPS80031_CHARGERUSB_CTRL3, &ctrl3); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", TPS80031_CHARGERUSB_CTRL3, ret); return ret; } if ((ctrl1 & OPA_MODE_EN) && (ctrl3 & BOOST_HW_PWR_EN)) return 1; return ret; } static int tps80031_vbus_enable(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); int ret; ret = tps80031_set_bits(parent, TPS80031_SLAVE_ID2, TPS80031_CHARGERUSB_CTRL1, OPA_MODE_EN); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", TPS80031_CHARGERUSB_CTRL1, ret); return ret; } ret = tps80031_set_bits(parent, TPS80031_SLAVE_ID2, TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n", TPS80031_CHARGERUSB_CTRL3, ret); return ret; } return ret; } static int tps80031_vbus_disable(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); int ret = 0; if (ri->config_flags & TPS80031_VBUS_DISCHRG_EN_PDN) { ret = tps80031_write(parent, TPS80031_SLAVE_ID2, USB_VBUS_CTRL_SET, VBUS_DISCHRG); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n", USB_VBUS_CTRL_SET, ret); return ret; } } ret = tps80031_clr_bits(parent, TPS80031_SLAVE_ID2, TPS80031_CHARGERUSB_CTRL1, OPA_MODE_EN); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n", TPS80031_CHARGERUSB_CTRL1, ret); return ret; } ret = tps80031_clr_bits(parent, TPS80031_SLAVE_ID2, TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n", TPS80031_CHARGERUSB_CTRL3, ret); return ret; } mdelay(DIV_ROUND_UP(ri->rinfo->desc.enable_time, 1000)); if (ri->config_flags & TPS80031_VBUS_DISCHRG_EN_PDN) { ret = tps80031_write(parent, TPS80031_SLAVE_ID2, USB_VBUS_CTRL_CLR, VBUS_DISCHRG); if (ret < 0) { dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n", USB_VBUS_CTRL_CLR, ret); return ret; } } return ret; } static struct regulator_ops tps80031_dcdc_ops = { .list_voltage = tps80031_dcdc_list_voltage, .set_voltage_sel = tps80031_dcdc_set_voltage_sel, .get_voltage_sel = tps80031_dcdc_get_voltage_sel, .enable = tps80031_reg_enable, .disable = tps80031_reg_disable, .is_enabled = tps80031_reg_is_enabled, }; static struct regulator_ops tps80031_ldo_ops = { .list_voltage = tps80031_ldo_list_voltage, .map_voltage = tps80031_ldo_map_voltage, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .enable = tps80031_reg_enable, .disable = tps80031_reg_disable, .is_enabled = tps80031_reg_is_enabled, }; static struct regulator_ops tps80031_vbus_sw_ops = { .list_voltage = regulator_list_voltage_linear, .enable = tps80031_vbus_enable, .disable = tps80031_vbus_disable, .is_enabled = tps80031_vbus_is_enabled, }; static struct regulator_ops tps80031_vbus_hw_ops = { .list_voltage = regulator_list_voltage_linear, }; static struct regulator_ops tps80031_ext_reg_ops = { .list_voltage = regulator_list_voltage_linear, .enable = tps80031_reg_enable, .disable = tps80031_reg_disable, .is_enabled = tps80031_reg_is_enabled, }; /* Non-exiting default definition for some register */ #define TPS80031_SMPS3_CFG_FORCE 0 #define TPS80031_SMPS4_CFG_FORCE 0 #define TPS80031_VBUS_CFG_TRANS 0 #define TPS80031_VBUS_CFG_STATE 0 #define TPS80031_REG_SMPS(_id, _volt_id, _pbit) \ { \ .trans_reg = TPS80031_##_id##_CFG_TRANS, \ .state_reg = TPS80031_##_id##_CFG_STATE, \ .force_reg = TPS80031_##_id##_CFG_FORCE, \ .volt_reg = TPS80031_##_id##_CFG_VOLTAGE, \ .volt_id = TPS80031_SLAVE_##_volt_id, \ .preq_bit = _pbit, \ .desc = { \ .name = "tps80031_"#_id, \ .id = TPS80031_REGULATOR_##_id, \ .n_voltages = 63, \ .ops = &tps80031_dcdc_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .enable_time = 500, \ }, \ } #define TPS80031_REG_LDO(_id, _preq_bit) \ { \ .trans_reg = TPS80031_##_id##_CFG_TRANS, \ .state_reg = TPS80031_##_id##_CFG_STATE, \ .volt_reg = TPS80031_##_id##_CFG_VOLTAGE, \ .volt_id = TPS80031_SLAVE_ID1, \ .preq_bit = _preq_bit, \ .desc = { \ .owner = THIS_MODULE, \ .name = "tps80031_"#_id, \ .id = TPS80031_REGULATOR_##_id, \ .ops = &tps80031_ldo_ops, \ .type = REGULATOR_VOLTAGE, \ .min_uV = 1000000, \ .uV_step = 100000, \ .linear_min_sel = 1, \ .n_voltages = 25, \ .vsel_reg = TPS80031_##_id##_CFG_VOLTAGE, \ .vsel_mask = LDO_VSEL_MASK, \ .enable_time = 500, \ }, \ } #define TPS80031_REG_FIXED(_id, max_mV, _ops, _delay, _pbit) \ { \ .trans_reg = TPS80031_##_id##_CFG_TRANS, \ .state_reg = TPS80031_##_id##_CFG_STATE, \ .volt_id = TPS80031_SLAVE_ID1, \ .preq_bit = _pbit, \ .desc = { \ .name = "tps80031_"#_id, \ .id = TPS80031_REGULATOR_##_id, \ .min_uV = max_mV * 1000, \ .n_voltages = 1, \ .ops = &_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .enable_time = _delay, \ }, \ } static struct tps80031_regulator_info tps80031_rinfo[TPS80031_REGULATOR_MAX] = { TPS80031_REG_SMPS(VIO, ID0, 4), TPS80031_REG_SMPS(SMPS1, ID0, 0), TPS80031_REG_SMPS(SMPS2, ID0, 1), TPS80031_REG_SMPS(SMPS3, ID1, 2), TPS80031_REG_SMPS(SMPS4, ID1, 3), TPS80031_REG_LDO(VANA, -1), TPS80031_REG_LDO(LDO1, 8), TPS80031_REG_LDO(LDO2, 9), TPS80031_REG_LDO(LDO3, 10), TPS80031_REG_LDO(LDO4, 11), TPS80031_REG_LDO(LDO5, 12), TPS80031_REG_LDO(LDO6, 13), TPS80031_REG_LDO(LDO7, 14), TPS80031_REG_LDO(LDOLN, 15), TPS80031_REG_LDO(LDOUSB, 5), TPS80031_REG_FIXED(VBUS, 5000, tps80031_vbus_hw_ops, 100000, -1), TPS80031_REG_FIXED(REGEN1, 3300, tps80031_ext_reg_ops, 0, 16), TPS80031_REG_FIXED(REGEN2, 3300, tps80031_ext_reg_ops, 0, 17), TPS80031_REG_FIXED(SYSEN, 3300, tps80031_ext_reg_ops, 0, 18), }; static int tps80031_power_req_config(struct device *parent, struct tps80031_regulator *ri, struct tps80031_regulator_platform_data *tps80031_pdata) { int ret = 0; if (ri->rinfo->preq_bit < 0) goto skip_pwr_req_config; ret = tps80031_ext_power_req_config(parent, ri->ext_ctrl_flag, ri->rinfo->preq_bit, ri->rinfo->state_reg, ri->rinfo->trans_reg); if (ret < 0) { dev_err(ri->dev, "ext powerreq config failed, err = %d\n", ret); return ret; } skip_pwr_req_config: if (tps80031_pdata->ext_ctrl_flag & TPS80031_PWR_ON_ON_SLEEP) { ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->trans_reg, TPS80031_TRANS_SLEEP_ON, TPS80031_TRANS_SLEEP_MASK); if (ret < 0) { dev_err(ri->dev, "Reg 0x%02x update failed, e %d\n", ri->rinfo->trans_reg, ret); return ret; } } return ret; } static int tps80031_regulator_config(struct device *parent, struct tps80031_regulator *ri, struct tps80031_regulator_platform_data *tps80031_pdata) { int ret = 0; switch (ri->rinfo->desc.id) { case TPS80031_REGULATOR_LDOUSB: if (ri->config_flags & (TPS80031_USBLDO_INPUT_VSYS | TPS80031_USBLDO_INPUT_PMID)) { unsigned val = 0; if (ri->config_flags & TPS80031_USBLDO_INPUT_VSYS) val = MISC2_LDOUSB_IN_VSYS; else val = MISC2_LDOUSB_IN_PMID; ret = tps80031_update(parent, TPS80031_SLAVE_ID1, TPS80031_MISC2, val, MISC2_LDOUSB_IN_MASK); if (ret < 0) { dev_err(ri->dev, "LDOUSB config failed, e= %d\n", ret); return ret; } } break; case TPS80031_REGULATOR_LDO3: if (ri->config_flags & TPS80031_LDO3_OUTPUT_VIB) { ret = tps80031_update(parent, TPS80031_SLAVE_ID1, TPS80031_MISC2, MISC2_LDO3_SEL_VIB_VAL, MISC2_LDO3_SEL_VIB_MASK); if (ret < 0) { dev_err(ri->dev, "LDO3 config failed, e = %d\n", ret); return ret; } } break; case TPS80031_REGULATOR_VBUS: /* Provide SW control Ops if VBUS is SW control */ if (!(ri->config_flags & TPS80031_VBUS_SW_ONLY)) ri->rinfo->desc.ops = &tps80031_vbus_sw_ops; break; default: break; } /* Configure Active state to ON, SLEEP to OFF and OFF_state to OFF */ ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->trans_reg, TPS80031_TRANS_ACTIVE_ON | TPS80031_TRANS_SLEEP_OFF | TPS80031_TRANS_OFF_OFF, TPS80031_TRANS_ACTIVE_MASK | TPS80031_TRANS_SLEEP_MASK | TPS80031_TRANS_OFF_MASK); if (ret < 0) { dev_err(ri->dev, "trans reg update failed, e %d\n", ret); return ret; } return ret; } static int check_smps_mode_mult(struct device *parent, struct tps80031_regulator *ri) { int mult_offset; int ret; u8 smps_offset; u8 smps_mult; ret = tps80031_read(parent, TPS80031_SLAVE_ID1, TPS80031_SMPS_OFFSET, &smps_offset); if (ret < 0) { dev_err(parent, "Error in reading smps offset register\n"); return ret; } ret = tps80031_read(parent, TPS80031_SLAVE_ID1, TPS80031_SMPS_MULT, &smps_mult); if (ret < 0) { dev_err(parent, "Error in reading smps mult register\n"); return ret; } switch (ri->rinfo->desc.id) { case TPS80031_REGULATOR_VIO: mult_offset = SMPS_MULTOFFSET_VIO; break; case TPS80031_REGULATOR_SMPS1: mult_offset = SMPS_MULTOFFSET_SMPS1; break; case TPS80031_REGULATOR_SMPS2: mult_offset = SMPS_MULTOFFSET_SMPS2; break; case TPS80031_REGULATOR_SMPS3: mult_offset = SMPS_MULTOFFSET_SMPS3; break; case TPS80031_REGULATOR_SMPS4: mult_offset = SMPS_MULTOFFSET_SMPS4; break; case TPS80031_REGULATOR_LDO2: ri->device_flags = smps_mult & BIT(5) ? TRACK_MODE_ENABLE : 0; /* TRACK mode the ldo2 varies from 600mV to 1300mV */ if (ri->device_flags & TRACK_MODE_ENABLE) { ri->rinfo->desc.min_uV = 600000; ri->rinfo->desc.uV_step = 12500; ri->rinfo->desc.n_voltages = 57; ri->rinfo->desc.vsel_mask = LDO_TRACK_VSEL_MASK; } return 0; default: return 0; } ri->device_flags = (smps_offset & mult_offset) ? DCDC_OFFSET_EN : 0; ri->device_flags |= (smps_mult & mult_offset) ? DCDC_EXTENDED_EN : 0; switch (ri->device_flags) { case 0: ri->rinfo->desc.min_uV = 607700; ri->rinfo->desc.uV_step = 12660; break; case DCDC_OFFSET_EN: ri->rinfo->desc.min_uV = 700000; ri->rinfo->desc.uV_step = 12500; break; case DCDC_EXTENDED_EN: ri->rinfo->desc.min_uV = 1852000; ri->rinfo->desc.uV_step = 38600; break; case DCDC_OFFSET_EN | DCDC_EXTENDED_EN: ri->rinfo->desc.min_uV = 2161000; ri->rinfo->desc.uV_step = 38600; break; } return 0; } static int tps80031_regulator_probe(struct platform_device *pdev) { struct tps80031_platform_data *pdata; struct tps80031_regulator_platform_data *tps_pdata; struct tps80031_regulator *ri; struct tps80031_regulator *pmic; struct regulator_dev *rdev; struct regulator_config config = { }; struct tps80031 *tps80031_mfd = dev_get_drvdata(pdev->dev.parent); int ret; int num; pdata = dev_get_platdata(pdev->dev.parent); if (!pdata) { dev_err(&pdev->dev, "No platform data\n"); return -EINVAL; } pmic = devm_kzalloc(&pdev->dev, TPS80031_REGULATOR_MAX * sizeof(*pmic), GFP_KERNEL); if (!pmic) { dev_err(&pdev->dev, "mem alloc for pmic failed\n"); return -ENOMEM; } for (num = 0; num < TPS80031_REGULATOR_MAX; ++num) { tps_pdata = pdata->regulator_pdata[num]; ri = &pmic[num]; ri->rinfo = &tps80031_rinfo[num]; ri->dev = &pdev->dev; check_smps_mode_mult(pdev->dev.parent, ri); config.dev = &pdev->dev; config.init_data = NULL; config.driver_data = ri; config.regmap = tps80031_mfd->regmap[ri->rinfo->volt_id]; if (tps_pdata) { config.init_data = tps_pdata->reg_init_data; ri->config_flags = tps_pdata->config_flags; ri->ext_ctrl_flag = tps_pdata->ext_ctrl_flag; ret = tps80031_regulator_config(pdev->dev.parent, ri, tps_pdata); if (ret < 0) { dev_err(&pdev->dev, "regulator config failed, e %d\n", ret); return ret; } ret = tps80031_power_req_config(pdev->dev.parent, ri, tps_pdata); if (ret < 0) { dev_err(&pdev->dev, "pwr_req config failed, err %d\n", ret); return ret; } } rdev = devm_regulator_register(&pdev->dev, &ri->rinfo->desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "register regulator failed %s\n", ri->rinfo->desc.name); return PTR_ERR(rdev); } ri->rdev = rdev; } platform_set_drvdata(pdev, pmic); return 0; } static struct platform_driver tps80031_regulator_driver = { .driver = { .name = "tps80031-pmic", .owner = THIS_MODULE, }, .probe = tps80031_regulator_probe, }; static int __init tps80031_regulator_init(void) { return platform_driver_register(&tps80031_regulator_driver); } subsys_initcall(tps80031_regulator_init); static void __exit tps80031_regulator_exit(void) { platform_driver_unregister(&tps80031_regulator_driver); } module_exit(tps80031_regulator_exit); MODULE_ALIAS("platform:tps80031-regulator"); MODULE_DESCRIPTION("Regulator Driver for TI TPS80031/TPS80032 PMIC"); MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); MODULE_LICENSE("GPL v2");