/* * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/ * * Author: Andrew F. Davis <afd@ti.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any * kind, whether expressed or implied; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License version 2 for more details. * * Based on the TPS65912 driver */ #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/mfd/tps65086.h> enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1, LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT }; #define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm) \ [_id] = { \ .desc = { \ .name = _name, \ .of_match = of_match_ptr(_of), \ .regulators_node = "regulators", \ .of_parse_cb = tps65086_of_parse_cb, \ .id = _id, \ .ops = ®_ops, \ .n_voltages = _nv, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = _vr, \ .vsel_mask = _vm, \ .enable_reg = _er, \ .enable_mask = _em, \ .volt_table = NULL, \ .linear_ranges = _lr, \ .n_linear_ranges = ARRAY_SIZE(_lr), \ }, \ .decay_reg = _dr, \ .decay_mask = _dm, \ } #define TPS65086_SWITCH(_name, _of, _id, _er, _em) \ [_id] = { \ .desc = { \ .name = _name, \ .of_match = of_match_ptr(_of), \ .regulators_node = "regulators", \ .of_parse_cb = tps65086_of_parse_cb, \ .id = _id, \ .ops = &switch_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .enable_reg = _er, \ .enable_mask = _em, \ }, \ } struct tps65086_regulator { struct regulator_desc desc; unsigned int decay_reg; unsigned int decay_mask; }; static const struct linear_range tps65086_10mv_ranges[] = { REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000), }; static const struct linear_range tps65086_buck126_25mv_ranges[] = { REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0), REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000), }; static const struct linear_range tps65086_buck345_25mv_ranges[] = { REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000), }; static const struct linear_range tps65086_ldoa1_ranges[] = { REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0), REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000), REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000), REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000), REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0), }; static const struct linear_range tps65086_ldoa23_ranges[] = { REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000), REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000), }; /* Operations permitted on regulators */ static const struct regulator_ops reg_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .map_voltage = regulator_map_voltage_linear_range, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear_range, }; /* Operations permitted on load switches */ static const struct regulator_ops switch_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; static int tps65086_of_parse_cb(struct device_node *dev, const struct regulator_desc *desc, struct regulator_config *config); static struct tps65086_regulator regulators[] = { TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL, BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0), tps65086_10mv_ranges, TPS65086_BUCK1CTRL, BIT(0)), TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL, BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1), tps65086_10mv_ranges, TPS65086_BUCK2CTRL, BIT(0)), TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID, BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2), tps65086_10mv_ranges, TPS65086_BUCK3DECAY, BIT(0)), TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID, BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0), tps65086_10mv_ranges, TPS65086_BUCK4VID, BIT(0)), TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID, BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0), tps65086_10mv_ranges, TPS65086_BUCK5CTRL, BIT(0)), TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID, BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0), tps65086_10mv_ranges, TPS65086_BUCK6CTRL, BIT(0)), TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL, VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0), tps65086_ldoa1_ranges, 0, 0), TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID, VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0), tps65086_ldoa23_ranges, 0, 0), TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID, VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0), tps65086_ldoa23_ranges, 0, 0), TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)), TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)), TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)), TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)), }; static int tps65086_of_parse_cb(struct device_node *node, const struct regulator_desc *desc, struct regulator_config *config) { int ret; /* Check for 25mV step mode */ if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) { switch (desc->id) { case BUCK1: case BUCK2: case BUCK6: regulators[desc->id].desc.linear_ranges = tps65086_buck126_25mv_ranges; regulators[desc->id].desc.n_linear_ranges = ARRAY_SIZE(tps65086_buck126_25mv_ranges); break; case BUCK3: case BUCK4: case BUCK5: regulators[desc->id].desc.linear_ranges = tps65086_buck345_25mv_ranges; regulators[desc->id].desc.n_linear_ranges = ARRAY_SIZE(tps65086_buck345_25mv_ranges); break; default: dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n"); } } /* Check for decay mode */ if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) { ret = regmap_write_bits(config->regmap, regulators[desc->id].decay_reg, regulators[desc->id].decay_mask, regulators[desc->id].decay_mask); if (ret) { dev_err(config->dev, "Error setting decay\n"); return ret; } } return 0; } static int tps65086_regulator_probe(struct platform_device *pdev) { struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent); struct regulator_config config = { }; struct regulator_dev *rdev; int i; platform_set_drvdata(pdev, tps); config.dev = &pdev->dev; config.dev->of_node = tps->dev->of_node; config.driver_data = tps; config.regmap = tps->regmap; for (i = 0; i < ARRAY_SIZE(regulators); i++) { rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, &config); if (IS_ERR(rdev)) { dev_err(tps->dev, "failed to register %s regulator\n", pdev->name); return PTR_ERR(rdev); } } return 0; } static const struct platform_device_id tps65086_regulator_id_table[] = { { "tps65086-regulator", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table); static struct platform_driver tps65086_regulator_driver = { .driver = { .name = "tps65086-regulator", }, .probe = tps65086_regulator_probe, .id_table = tps65086_regulator_id_table, }; module_platform_driver(tps65086_regulator_driver); MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); MODULE_DESCRIPTION("TPS65086 Regulator driver"); MODULE_LICENSE("GPL v2");