/* * Regulator driver for LP873X PMIC * * Copyright (C) 2016 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 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. */ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/mfd/lp873x.h> #define LP873X_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ _delay, _lr, _cr) \ [_id] = { \ .desc = { \ .name = _name, \ .supply_name = _of "-in", \ .id = _id, \ .of_match = of_match_ptr(_of), \ .regulators_node = of_match_ptr("regulators"),\ .ops = &_ops, \ .n_voltages = _n, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = _vr, \ .vsel_mask = _vm, \ .enable_reg = _er, \ .enable_mask = _em, \ .ramp_delay = _delay, \ .linear_ranges = _lr, \ .n_linear_ranges = ARRAY_SIZE(_lr), \ }, \ .ctrl2_reg = _cr, \ } struct lp873x_regulator { struct regulator_desc desc; unsigned int ctrl2_reg; }; static const struct lp873x_regulator regulators[]; static const struct regulator_linear_range buck0_buck1_ranges[] = { REGULATOR_LINEAR_RANGE(0, 0x0, 0x13, 0), REGULATOR_LINEAR_RANGE(700000, 0x14, 0x17, 10000), REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), }; static const struct regulator_linear_range ldo0_ldo1_ranges[] = { REGULATOR_LINEAR_RANGE(800000, 0x0, 0x19, 100000), }; static unsigned int lp873x_buck_ramp_delay[] = { 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 }; /* LP873X BUCK current limit */ static const unsigned int lp873x_buck_uA[] = { 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, }; static int lp873x_buck_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { int id = rdev_get_id(rdev); struct lp873x *lp873 = rdev_get_drvdata(rdev); unsigned int reg; int ret; if (ramp_delay <= 470) reg = 7; else if (ramp_delay <= 940) reg = 6; else if (ramp_delay <= 1900) reg = 5; else if (ramp_delay <= 3800) reg = 4; else if (ramp_delay <= 7500) reg = 3; else if (ramp_delay <= 10000) reg = 2; else if (ramp_delay <= 15000) reg = 1; else reg = 0; ret = regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg, LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE, reg << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE)); if (ret) { dev_err(lp873->dev, "SLEW RATE write failed: %d\n", ret); return ret; } rdev->constraints->ramp_delay = lp873x_buck_ramp_delay[reg]; return 0; } static int lp873x_buck_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { int id = rdev_get_id(rdev); struct lp873x *lp873 = rdev_get_drvdata(rdev); int i; for (i = ARRAY_SIZE(lp873x_buck_uA) - 1; i >= 0; i--) { if (lp873x_buck_uA[i] >= min_uA && lp873x_buck_uA[i] <= max_uA) return regmap_update_bits(lp873->regmap, regulators[id].ctrl2_reg, LP873X_BUCK0_CTRL_2_BUCK0_ILIM, i << __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM)); } return -EINVAL; } static int lp873x_buck_get_current_limit(struct regulator_dev *rdev) { int id = rdev_get_id(rdev); struct lp873x *lp873 = rdev_get_drvdata(rdev); int ret; unsigned int val; ret = regmap_read(lp873->regmap, regulators[id].ctrl2_reg, &val); if (ret) return ret; val = (val & LP873X_BUCK0_CTRL_2_BUCK0_ILIM) >> __ffs(LP873X_BUCK0_CTRL_2_BUCK0_ILIM); return (val < ARRAY_SIZE(lp873x_buck_uA)) ? lp873x_buck_uA[val] : -EINVAL; } /* Operations permitted on BUCK0, BUCK1 */ static struct regulator_ops lp873x_buck01_ops = { .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = lp873x_buck_set_ramp_delay, .set_current_limit = lp873x_buck_set_current_limit, .get_current_limit = lp873x_buck_get_current_limit, }; /* Operations permitted on LDO0 and LDO1 */ static struct regulator_ops lp873x_ldo01_ops = { .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, }; static const struct lp873x_regulator regulators[] = { LP873X_REGULATOR("BUCK0", LP873X_BUCK_0, "buck0", lp873x_buck01_ops, 256, LP873X_REG_BUCK0_VOUT, LP873X_BUCK0_VOUT_BUCK0_VSET, LP873X_REG_BUCK0_CTRL_1, LP873X_BUCK0_CTRL_1_BUCK0_EN, 10000, buck0_buck1_ranges, LP873X_REG_BUCK0_CTRL_2), LP873X_REGULATOR("BUCK1", LP873X_BUCK_1, "buck1", lp873x_buck01_ops, 256, LP873X_REG_BUCK1_VOUT, LP873X_BUCK1_VOUT_BUCK1_VSET, LP873X_REG_BUCK1_CTRL_1, LP873X_BUCK1_CTRL_1_BUCK1_EN, 10000, buck0_buck1_ranges, LP873X_REG_BUCK1_CTRL_2), LP873X_REGULATOR("LDO0", LP873X_LDO_0, "ldo0", lp873x_ldo01_ops, 26, LP873X_REG_LDO0_VOUT, LP873X_LDO0_VOUT_LDO0_VSET, LP873X_REG_LDO0_CTRL, LP873X_LDO0_CTRL_LDO0_EN, 0, ldo0_ldo1_ranges, 0xFF), LP873X_REGULATOR("LDO1", LP873X_LDO_1, "ldo1", lp873x_ldo01_ops, 26, LP873X_REG_LDO1_VOUT, LP873X_LDO1_VOUT_LDO1_VSET, LP873X_REG_LDO1_CTRL, LP873X_LDO1_CTRL_LDO1_EN, 0, ldo0_ldo1_ranges, 0xFF), }; static int lp873x_regulator_probe(struct platform_device *pdev) { struct lp873x *lp873 = dev_get_drvdata(pdev->dev.parent); struct regulator_config config = { }; struct regulator_dev *rdev; int i; platform_set_drvdata(pdev, lp873); config.dev = &pdev->dev; config.dev->of_node = lp873->dev->of_node; config.driver_data = lp873; config.regmap = lp873->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(lp873->dev, "failed to register %s regulator\n", pdev->name); return PTR_ERR(rdev); } } return 0; } static const struct platform_device_id lp873x_regulator_id_table[] = { { "lp873x-regulator", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, lp873x_regulator_id_table); static struct platform_driver lp873x_regulator_driver = { .driver = { .name = "lp873x-pmic", }, .probe = lp873x_regulator_probe, .id_table = lp873x_regulator_id_table, }; module_platform_driver(lp873x_regulator_driver); MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); MODULE_DESCRIPTION("LP873X voltage regulator driver"); MODULE_ALIAS("platform:lp873x-pmic"); MODULE_LICENSE("GPL v2");