/* * tps65217-regulator.c * * Regulator driver for TPS65217 PMIC * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.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. */ #include #include #include #include #include #include #include #include #include #define TPS65217_REGULATOR(_name, _id, _ops, _n) \ { \ .name = _name, \ .id = _id, \ .ops = &_ops, \ .n_voltages = _n, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ } \ #define TPS65217_INFO(_nm, _min, _max, _f1, _f2, _t, _n, _em, _vr, _vm) \ { \ .name = _nm, \ .min_uV = _min, \ .max_uV = _max, \ .vsel_to_uv = _f1, \ .uv_to_vsel = _f2, \ .table = _t, \ .table_len = _n, \ .enable_mask = _em, \ .set_vout_reg = _vr, \ .set_vout_mask = _vm, \ } static const int LDO1_VSEL_table[] = { 1000000, 1100000, 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1800000, 2500000, 2750000, 2800000, 3000000, 3100000, 3300000, }; static int tps65217_vsel_to_uv1(unsigned int vsel) { int uV = 0; if (vsel > 63) return -EINVAL; if (vsel <= 24) uV = vsel * 25000 + 900000; else if (vsel <= 52) uV = (vsel - 24) * 50000 + 1500000; else if (vsel < 56) uV = (vsel - 52) * 100000 + 2900000; else uV = 3300000; return uV; } static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) { if ((uV < 0) && (uV > 3300000)) return -EINVAL; if (uV <= 1500000) *vsel = DIV_ROUND_UP(uV - 900000, 25000); else if (uV <= 2900000) *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000); else if (uV < 3300000) *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000); else *vsel = 56; return 0; } static int tps65217_vsel_to_uv2(unsigned int vsel) { int uV = 0; if (vsel > 31) return -EINVAL; if (vsel <= 8) uV = vsel * 50000 + 1500000; else if (vsel <= 13) uV = (vsel - 8) * 100000 + 1900000; else uV = (vsel - 13) * 50000 + 2400000; return uV; } static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) { if ((uV < 0) && (uV > 3300000)) return -EINVAL; if (uV <= 1900000) *vsel = DIV_ROUND_UP(uV - 1500000, 50000); else if (uV <= 2400000) *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000); else *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000); return 0; } static struct tps_info tps65217_pmic_regs[] = { TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC1_EN, TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK), TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC2_EN, TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK), TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC3_EN, TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK), TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL, LDO1_VSEL_table, 16, TPS65217_ENABLE_LDO1_EN, TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK), TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_LDO2_EN, TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK), TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, tps65217_uv_to_vsel2, NULL, 32, TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK), TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, tps65217_uv_to_vsel2, NULL, 32, TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK), }; static int tps65217_pmic_is_enabled(struct regulator_dev *dev) { int ret; struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int data, rid = rdev_get_id(dev); if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) return -EINVAL; ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data); if (ret) return ret; return (data & tps->info[rid]->enable_mask) ? 1 : 0; } static int tps65217_pmic_enable(struct regulator_dev *dev) { struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int rid = rdev_get_id(dev); if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) return -EINVAL; /* Enable the regulator and password protection is level 1 */ return tps65217_set_bits(tps, TPS65217_REG_ENABLE, tps->info[rid]->enable_mask, tps->info[rid]->enable_mask, TPS65217_PROTECT_L1); } static int tps65217_pmic_disable(struct regulator_dev *dev) { struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int rid = rdev_get_id(dev); if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) return -EINVAL; /* Disable the regulator and password protection is level 1 */ return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, tps->info[rid]->enable_mask, TPS65217_PROTECT_L1); } static int tps65217_pmic_get_voltage_sel(struct regulator_dev *dev) { int ret; struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int selector, rid = rdev_get_id(dev); if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) return -EINVAL; ret = tps65217_reg_read(tps, tps->info[rid]->set_vout_reg, &selector); if (ret) return ret; selector &= tps->info[rid]->set_vout_mask; return selector; } static int tps65217_pmic_ldo1_set_voltage_sel(struct regulator_dev *dev, unsigned selector) { struct tps65217 *tps = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev); if (ldo != TPS65217_LDO_1) return -EINVAL; if (selector >= tps->info[ldo]->table_len) return -EINVAL; /* Set the voltage based on vsel value and write protect level is 2 */ return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg, tps->info[ldo]->set_vout_mask, selector, TPS65217_PROTECT_L2); } static int tps65217_pmic_set_voltage(struct regulator_dev *dev, int min_uV, int max_uV, unsigned *selector) { int ret; struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int rid = rdev_get_id(dev); /* LDO1 implements set_voltage_sel callback */ if (rid == TPS65217_LDO_1) return -EINVAL; if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) return -EINVAL; if (min_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) return -EINVAL; if (max_uV < tps->info[rid]->min_uV || max_uV > tps->info[rid]->max_uV) return -EINVAL; ret = tps->info[rid]->uv_to_vsel(min_uV, selector); if (ret) return ret; /* Set the voltage based on vsel value and write protect level is 2 */ ret = tps65217_set_bits(tps, tps->info[rid]->set_vout_reg, tps->info[rid]->set_vout_mask, *selector, TPS65217_PROTECT_L2); /* Set GO bit for DCDCx to initiate voltage transistion */ switch (rid) { case TPS65217_DCDC_1 ... TPS65217_DCDC_3: ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, TPS65217_PROTECT_L2); break; } return ret; } static int tps65217_pmic_list_voltage(struct regulator_dev *dev, unsigned selector) { struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int rid = rdev_get_id(dev); if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) return -EINVAL; if (selector >= tps->info[rid]->table_len) return -EINVAL; if (tps->info[rid]->table) return tps->info[rid]->table[selector]; return tps->info[rid]->vsel_to_uv(selector); } /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ static struct regulator_ops tps65217_pmic_ops = { .is_enabled = tps65217_pmic_is_enabled, .enable = tps65217_pmic_enable, .disable = tps65217_pmic_disable, .get_voltage_sel = tps65217_pmic_get_voltage_sel, .set_voltage = tps65217_pmic_set_voltage, .list_voltage = tps65217_pmic_list_voltage, }; /* Operations permitted on LDO1 */ static struct regulator_ops tps65217_pmic_ldo1_ops = { .is_enabled = tps65217_pmic_is_enabled, .enable = tps65217_pmic_enable, .disable = tps65217_pmic_disable, .get_voltage_sel = tps65217_pmic_get_voltage_sel, .set_voltage_sel = tps65217_pmic_ldo1_set_voltage_sel, .list_voltage = tps65217_pmic_list_voltage, }; static struct regulator_desc regulators[] = { TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64), TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64), TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64), TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16), TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64), TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32), TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32), }; static int __devinit tps65217_regulator_probe(struct platform_device *pdev) { struct regulator_dev *rdev; struct tps65217 *tps; struct tps_info *info = &tps65217_pmic_regs[pdev->id]; /* Already set by core driver */ tps = dev_to_tps65217(pdev->dev.parent); tps->info[pdev->id] = info; rdev = regulator_register(®ulators[pdev->id], &pdev->dev, pdev->dev.platform_data, tps, NULL); if (IS_ERR(rdev)) return PTR_ERR(rdev); platform_set_drvdata(pdev, rdev); return 0; } static int __devexit tps65217_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); regulator_unregister(rdev); return 0; } static struct platform_driver tps65217_regulator_driver = { .driver = { .name = "tps65217-pmic", }, .probe = tps65217_regulator_probe, .remove = __devexit_p(tps65217_regulator_remove), }; static int __init tps65217_regulator_init(void) { return platform_driver_register(&tps65217_regulator_driver); } subsys_initcall(tps65217_regulator_init); static void __exit tps65217_regulator_exit(void) { platform_driver_unregister(&tps65217_regulator_driver); } module_exit(tps65217_regulator_exit); MODULE_AUTHOR("AnilKumar Ch "); MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); MODULE_ALIAS("platform:tps65217-pmic"); MODULE_LICENSE("GPL v2");