| /* |
| * Regulator driver for LP87565 PMIC |
| * |
| * Copyright (C) 2017 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. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| |
| #include <linux/mfd/lp87565.h> |
| |
| #define LP87565_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), \ |
| .curr_table = lp87565_buck_uA, \ |
| .n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\ |
| .csel_reg = (_cr), \ |
| .csel_mask = LP87565_BUCK_CTRL_2_ILIM, \ |
| }, \ |
| .ctrl2_reg = _cr, \ |
| } |
| |
| struct lp87565_regulator { |
| struct regulator_desc desc; |
| unsigned int ctrl2_reg; |
| }; |
| |
| static const struct lp87565_regulator regulators[]; |
| |
| static const struct regulator_linear_range buck0_1_2_3_ranges[] = { |
| REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000), |
| REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), |
| REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), |
| }; |
| |
| static const unsigned int lp87565_buck_ramp_delay[] = { |
| 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 |
| }; |
| |
| /* LP87565 BUCK current limit */ |
| static const unsigned int lp87565_buck_uA[] = { |
| 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, |
| }; |
| |
| static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev, |
| int ramp_delay) |
| { |
| int id = rdev_get_id(rdev); |
| struct lp87565 *lp87565 = 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(lp87565->regmap, regulators[id].ctrl2_reg, |
| LP87565_BUCK_CTRL_2_SLEW_RATE, |
| reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); |
| if (ret) { |
| dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret); |
| return ret; |
| } |
| |
| rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; |
| |
| /* Conservatively give a 15% margin */ |
| rdev->constraints->ramp_delay = |
| rdev->constraints->ramp_delay * 85 / 100; |
| |
| return 0; |
| } |
| |
| /* Operations permitted on BUCKs */ |
| static const struct regulator_ops lp87565_buck_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 = lp87565_buck_set_ramp_delay, |
| .set_current_limit = regulator_set_current_limit_regmap, |
| .get_current_limit = regulator_get_current_limit_regmap, |
| }; |
| |
| static const struct lp87565_regulator regulators[] = { |
| LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, |
| 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, |
| LP87565_REG_BUCK0_CTRL_1, |
| LP87565_BUCK_CTRL_1_EN, 3230, |
| buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
| LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, |
| 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, |
| LP87565_REG_BUCK1_CTRL_1, |
| LP87565_BUCK_CTRL_1_EN, 3230, |
| buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), |
| LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, |
| 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, |
| LP87565_REG_BUCK2_CTRL_1, |
| LP87565_BUCK_CTRL_1_EN, 3230, |
| buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
| LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, |
| 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, |
| LP87565_REG_BUCK3_CTRL_1, |
| LP87565_BUCK_CTRL_1_EN, 3230, |
| buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), |
| LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, |
| 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, |
| LP87565_REG_BUCK0_CTRL_1, |
| LP87565_BUCK_CTRL_1_EN | |
| LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, |
| buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
| LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, |
| 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, |
| LP87565_REG_BUCK2_CTRL_1, |
| LP87565_BUCK_CTRL_1_EN, 3230, |
| buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
| }; |
| |
| static int lp87565_regulator_probe(struct platform_device *pdev) |
| { |
| struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); |
| struct regulator_config config = { }; |
| struct regulator_dev *rdev; |
| int i, min_idx = LP87565_BUCK_0, max_idx = LP87565_BUCK_3; |
| |
| platform_set_drvdata(pdev, lp87565); |
| |
| config.dev = &pdev->dev; |
| config.dev->of_node = lp87565->dev->of_node; |
| config.driver_data = lp87565; |
| config.regmap = lp87565->regmap; |
| |
| if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) { |
| min_idx = LP87565_BUCK_10; |
| max_idx = LP87565_BUCK_23; |
| } |
| |
| for (i = min_idx; i <= max_idx; i++) { |
| rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, |
| &config); |
| if (IS_ERR(rdev)) { |
| dev_err(lp87565->dev, "failed to register %s regulator\n", |
| pdev->name); |
| return PTR_ERR(rdev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id lp87565_regulator_id_table[] = { |
| { "lp87565-regulator", }, |
| { "lp87565-q1-regulator", }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); |
| |
| static struct platform_driver lp87565_regulator_driver = { |
| .driver = { |
| .name = "lp87565-pmic", |
| }, |
| .probe = lp87565_regulator_probe, |
| .id_table = lp87565_regulator_id_table, |
| }; |
| module_platform_driver(lp87565_regulator_driver); |
| |
| MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); |
| MODULE_DESCRIPTION("LP87565 voltage regulator driver"); |
| MODULE_LICENSE("GPL v2"); |
