/* * 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 <linux/kernel.h> #include <linux/module.h> #include <linux/device.h> #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/regulator/of_regulator.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/mfd/tps65217.h> #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \ { \ .name = _name, \ .id = _id, \ .ops = &_ops, \ .n_voltages = _n, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = _vr, \ .vsel_mask = _vm, \ .enable_reg = TPS65217_REG_ENABLE, \ .enable_mask = _em, \ .volt_table = _t, \ } \ #define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \ { \ .name = _nm, \ .min_uV = _min, \ .max_uV = _max, \ .vsel_to_uv = _f1, \ .uv_to_vsel = _f2, \ } static const unsigned 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), TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1), TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1), TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL), TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, tps65217_uv_to_vsel1), TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, tps65217_uv_to_vsel2), TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, tps65217_uv_to_vsel2), }; 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, dev->desc->enable_mask, dev->desc->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, dev->desc->enable_mask, TPS65217_PROTECT_L1); } static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, unsigned selector) { int ret; struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int rid = rdev_get_id(dev); /* Set the voltage based on vsel value and write protect level is 2 */ ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_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_map_voltage(struct regulator_dev *dev, int min_uV, int max_uV) { struct tps65217 *tps = rdev_get_drvdata(dev); unsigned int sel, rid = rdev_get_id(dev); int ret; /* LDO1 uses regulator_map_voltage_iterate() */ 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]->min_uV; if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) return -EINVAL; ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); if (ret) return ret; return sel; } 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 >= dev->desc->n_voltages) return -EINVAL; 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 = regulator_is_enabled_regmap, .enable = tps65217_pmic_enable, .disable = tps65217_pmic_disable, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = tps65217_pmic_set_voltage_sel, .list_voltage = tps65217_pmic_list_voltage, .map_voltage = tps65217_pmic_map_voltage, }; /* Operations permitted on LDO1 */ static struct regulator_ops tps65217_pmic_ldo1_ops = { .is_enabled = regulator_is_enabled_regmap, .enable = tps65217_pmic_enable, .disable = tps65217_pmic_disable, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = tps65217_pmic_set_voltage_sel, .list_voltage = regulator_list_voltage_table, }; static const struct regulator_desc regulators[] = { TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN, NULL), TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN, NULL), TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN, NULL), TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table), TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN, NULL), TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, NULL), TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, NULL), }; #ifdef CONFIG_OF static struct of_regulator_match reg_matches[] = { { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 }, { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 }, { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 }, { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 }, { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 }, { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 }, { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 }, }; static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) { struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); struct device_node *node = tps->dev->of_node; struct tps65217_board *pdata; struct device_node *regs; int i, count; regs = of_find_node_by_name(node, "regulators"); if (!regs) return NULL; count = of_regulator_match(&pdev->dev, regs, reg_matches, TPS65217_NUM_REGULATOR); of_node_put(regs); if ((count < 0) || (count > TPS65217_NUM_REGULATOR)) return NULL; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return NULL; for (i = 0; i < count; i++) { if (!reg_matches[i].init_data || !reg_matches[i].of_node) continue; pdata->tps65217_init_data[i] = reg_matches[i].init_data; pdata->of_node[i] = reg_matches[i].of_node; } return pdata; } #else static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) { return NULL; } #endif static int tps65217_regulator_probe(struct platform_device *pdev) { struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); struct tps65217_board *pdata = dev_get_platdata(tps->dev); struct regulator_init_data *reg_data; struct regulator_dev *rdev; struct regulator_config config = { }; int i, ret; if (tps->dev->of_node) pdata = tps65217_parse_dt(pdev); if (!pdata) { dev_err(&pdev->dev, "Platform data not found\n"); return -EINVAL; } if (tps65217_chip_id(tps) != TPS65217) { dev_err(&pdev->dev, "Invalid tps chip version\n"); return -ENODEV; } platform_set_drvdata(pdev, tps); for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { reg_data = pdata->tps65217_init_data[i]; /* * Regulator API handles empty constraints but not NULL * constraints */ if (!reg_data) continue; /* Register the regulators */ tps->info[i] = &tps65217_pmic_regs[i]; config.dev = tps->dev; config.init_data = reg_data; config.driver_data = tps; config.regmap = tps->regmap; if (tps->dev->of_node) config.of_node = pdata->of_node[i]; rdev = regulator_register(®ulators[i], &config); if (IS_ERR(rdev)) { dev_err(tps->dev, "failed to register %s regulator\n", pdev->name); ret = PTR_ERR(rdev); goto err_unregister_regulator; } /* Save regulator for cleanup */ tps->rdev[i] = rdev; } return 0; err_unregister_regulator: while (--i >= 0) regulator_unregister(tps->rdev[i]); return ret; } static int tps65217_regulator_remove(struct platform_device *pdev) { struct tps65217 *tps = platform_get_drvdata(pdev); unsigned int i; for (i = 0; i < TPS65217_NUM_REGULATOR; i++) regulator_unregister(tps->rdev[i]); platform_set_drvdata(pdev, NULL); return 0; } static struct platform_driver tps65217_regulator_driver = { .driver = { .name = "tps65217-pmic", }, .probe = tps65217_regulator_probe, .remove = 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 <anilkumar@ti.com>"); MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); MODULE_ALIAS("platform:tps65217-pmic"); MODULE_LICENSE("GPL v2");