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drivers/regulator/lp87565-regulator.c
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81f7e3824 Initial Release, ... |
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/* * 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), \ }, \ .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 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 ", ret); return ret; } rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; return 0; } static int lp87565_buck_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { int id = rdev_get_id(rdev); struct lp87565 *lp87565 = rdev_get_drvdata(rdev); int i; for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) { if (lp87565_buck_uA[i] >= min_uA && lp87565_buck_uA[i] <= max_uA) return regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg, LP87565_BUCK_CTRL_2_ILIM, i << __ffs(LP87565_BUCK_CTRL_2_ILIM)); } return -EINVAL; } static int lp87565_buck_get_current_limit(struct regulator_dev *rdev) { int id = rdev_get_id(rdev); struct lp87565 *lp87565 = rdev_get_drvdata(rdev); int ret; unsigned int val; ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val); if (ret) return ret; val = (val & LP87565_BUCK_CTRL_2_ILIM) >> __ffs(LP87565_BUCK_CTRL_2_ILIM); return (val < ARRAY_SIZE(lp87565_buck_uA)) ? lp87565_buck_uA[val] : -EINVAL; } /* Operations permitted on BUCK0, BUCK1 */ static 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 = lp87565_buck_set_current_limit, .get_current_limit = lp87565_buck_get_current_limit, }; 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, 3800, 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, 3800, 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, 3800, 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, 3800, 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, 3800, 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, 3800, 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_1, 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 ", 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"); |