1f0168a9bSKeerthy /* 2f0168a9bSKeerthy * Regulator driver for LP87565 PMIC 3f0168a9bSKeerthy * 4f0168a9bSKeerthy * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ 5f0168a9bSKeerthy * 6f0168a9bSKeerthy * This program is free software; you can redistribute it and/or modify it 7f0168a9bSKeerthy * under the terms of the GNU General Public License as published by the 8580331d0SKeerthy * Free Software Foundation version 2. 9f0168a9bSKeerthy */ 10f0168a9bSKeerthy 11f0168a9bSKeerthy #include <linux/module.h> 12f0168a9bSKeerthy #include <linux/platform_device.h> 13f0168a9bSKeerthy #include <linux/regmap.h> 14f0168a9bSKeerthy 15f0168a9bSKeerthy #include <linux/mfd/lp87565.h> 16f0168a9bSKeerthy 17f0168a9bSKeerthy #define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ 18f0168a9bSKeerthy _delay, _lr, _cr) \ 19f0168a9bSKeerthy [_id] = { \ 20f0168a9bSKeerthy .desc = { \ 21f0168a9bSKeerthy .name = _name, \ 22f0168a9bSKeerthy .supply_name = _of "-in", \ 23f0168a9bSKeerthy .id = _id, \ 24f0168a9bSKeerthy .of_match = of_match_ptr(_of), \ 25f0168a9bSKeerthy .regulators_node = of_match_ptr("regulators"),\ 26f0168a9bSKeerthy .ops = &_ops, \ 27f0168a9bSKeerthy .n_voltages = _n, \ 28f0168a9bSKeerthy .type = REGULATOR_VOLTAGE, \ 29f0168a9bSKeerthy .owner = THIS_MODULE, \ 30f0168a9bSKeerthy .vsel_reg = _vr, \ 31f0168a9bSKeerthy .vsel_mask = _vm, \ 32f0168a9bSKeerthy .enable_reg = _er, \ 33f0168a9bSKeerthy .enable_mask = _em, \ 34f0168a9bSKeerthy .ramp_delay = _delay, \ 35f0168a9bSKeerthy .linear_ranges = _lr, \ 36f0168a9bSKeerthy .n_linear_ranges = ARRAY_SIZE(_lr), \ 37f0168a9bSKeerthy }, \ 38f0168a9bSKeerthy .ctrl2_reg = _cr, \ 39f0168a9bSKeerthy } 40f0168a9bSKeerthy 41f0168a9bSKeerthy struct lp87565_regulator { 42f0168a9bSKeerthy struct regulator_desc desc; 43f0168a9bSKeerthy unsigned int ctrl2_reg; 44f0168a9bSKeerthy }; 45f0168a9bSKeerthy 46f0168a9bSKeerthy static const struct lp87565_regulator regulators[]; 47f0168a9bSKeerthy 48f0168a9bSKeerthy static const struct regulator_linear_range buck0_1_2_3_ranges[] = { 49f0168a9bSKeerthy REGULATOR_LINEAR_RANGE(500000, 0x0, 0x17, 10000), 50f0168a9bSKeerthy REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), 51f0168a9bSKeerthy REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), 52f0168a9bSKeerthy }; 53f0168a9bSKeerthy 54f0168a9bSKeerthy static unsigned int lp87565_buck_ramp_delay[] = { 55f0168a9bSKeerthy 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 56f0168a9bSKeerthy }; 57f0168a9bSKeerthy 58f0168a9bSKeerthy /* LP87565 BUCK current limit */ 59f0168a9bSKeerthy static const unsigned int lp87565_buck_uA[] = { 60f0168a9bSKeerthy 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, 61f0168a9bSKeerthy }; 62f0168a9bSKeerthy 63f0168a9bSKeerthy static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev, 64f0168a9bSKeerthy int ramp_delay) 65f0168a9bSKeerthy { 66f0168a9bSKeerthy int id = rdev_get_id(rdev); 67f0168a9bSKeerthy struct lp87565 *lp87565 = rdev_get_drvdata(rdev); 68f0168a9bSKeerthy unsigned int reg; 69f0168a9bSKeerthy int ret; 70f0168a9bSKeerthy 71f0168a9bSKeerthy if (ramp_delay <= 470) 72f0168a9bSKeerthy reg = 7; 73f0168a9bSKeerthy else if (ramp_delay <= 940) 74f0168a9bSKeerthy reg = 6; 75f0168a9bSKeerthy else if (ramp_delay <= 1900) 76f0168a9bSKeerthy reg = 5; 77f0168a9bSKeerthy else if (ramp_delay <= 3800) 78f0168a9bSKeerthy reg = 4; 79f0168a9bSKeerthy else if (ramp_delay <= 7500) 80f0168a9bSKeerthy reg = 3; 81f0168a9bSKeerthy else if (ramp_delay <= 10000) 82f0168a9bSKeerthy reg = 2; 83f0168a9bSKeerthy else if (ramp_delay <= 15000) 84f0168a9bSKeerthy reg = 1; 85f0168a9bSKeerthy else 86f0168a9bSKeerthy reg = 0; 87f0168a9bSKeerthy 88f0168a9bSKeerthy ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg, 89f0168a9bSKeerthy LP87565_BUCK_CTRL_2_SLEW_RATE, 90f0168a9bSKeerthy reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); 91f0168a9bSKeerthy if (ret) { 92f0168a9bSKeerthy dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret); 93f0168a9bSKeerthy return ret; 94f0168a9bSKeerthy } 95f0168a9bSKeerthy 96f0168a9bSKeerthy rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; 97f0168a9bSKeerthy 98f0168a9bSKeerthy return 0; 99f0168a9bSKeerthy } 100f0168a9bSKeerthy 101f0168a9bSKeerthy static int lp87565_buck_set_current_limit(struct regulator_dev *rdev, 102f0168a9bSKeerthy int min_uA, int max_uA) 103f0168a9bSKeerthy { 104f0168a9bSKeerthy int id = rdev_get_id(rdev); 105f0168a9bSKeerthy struct lp87565 *lp87565 = rdev_get_drvdata(rdev); 106f0168a9bSKeerthy int i; 107f0168a9bSKeerthy 108f0168a9bSKeerthy for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) { 109f0168a9bSKeerthy if (lp87565_buck_uA[i] >= min_uA && 110f0168a9bSKeerthy lp87565_buck_uA[i] <= max_uA) 111f0168a9bSKeerthy return regmap_update_bits(lp87565->regmap, 112f0168a9bSKeerthy regulators[id].ctrl2_reg, 113f0168a9bSKeerthy LP87565_BUCK_CTRL_2_ILIM, 114f0168a9bSKeerthy i << __ffs(LP87565_BUCK_CTRL_2_ILIM)); 115f0168a9bSKeerthy } 116f0168a9bSKeerthy 117f0168a9bSKeerthy return -EINVAL; 118f0168a9bSKeerthy } 119f0168a9bSKeerthy 120f0168a9bSKeerthy static int lp87565_buck_get_current_limit(struct regulator_dev *rdev) 121f0168a9bSKeerthy { 122f0168a9bSKeerthy int id = rdev_get_id(rdev); 123f0168a9bSKeerthy struct lp87565 *lp87565 = rdev_get_drvdata(rdev); 124f0168a9bSKeerthy int ret; 125f0168a9bSKeerthy unsigned int val; 126f0168a9bSKeerthy 127f0168a9bSKeerthy ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val); 128f0168a9bSKeerthy if (ret) 129f0168a9bSKeerthy return ret; 130f0168a9bSKeerthy 131f0168a9bSKeerthy val = (val & LP87565_BUCK_CTRL_2_ILIM) >> 132f0168a9bSKeerthy __ffs(LP87565_BUCK_CTRL_2_ILIM); 133f0168a9bSKeerthy 134f0168a9bSKeerthy return (val < ARRAY_SIZE(lp87565_buck_uA)) ? 135f0168a9bSKeerthy lp87565_buck_uA[val] : -EINVAL; 136f0168a9bSKeerthy } 137f0168a9bSKeerthy 138f0168a9bSKeerthy /* Operations permitted on BUCK0, BUCK1 */ 139f0168a9bSKeerthy static struct regulator_ops lp87565_buck_ops = { 140f0168a9bSKeerthy .is_enabled = regulator_is_enabled_regmap, 141f0168a9bSKeerthy .enable = regulator_enable_regmap, 142f0168a9bSKeerthy .disable = regulator_disable_regmap, 143f0168a9bSKeerthy .get_voltage_sel = regulator_get_voltage_sel_regmap, 144f0168a9bSKeerthy .set_voltage_sel = regulator_set_voltage_sel_regmap, 145f0168a9bSKeerthy .list_voltage = regulator_list_voltage_linear_range, 146f0168a9bSKeerthy .map_voltage = regulator_map_voltage_linear_range, 147f0168a9bSKeerthy .set_voltage_time_sel = regulator_set_voltage_time_sel, 148f0168a9bSKeerthy .set_ramp_delay = lp87565_buck_set_ramp_delay, 149f0168a9bSKeerthy .set_current_limit = lp87565_buck_set_current_limit, 150f0168a9bSKeerthy .get_current_limit = lp87565_buck_get_current_limit, 151f0168a9bSKeerthy }; 152f0168a9bSKeerthy 153f0168a9bSKeerthy static const struct lp87565_regulator regulators[] = { 154f0168a9bSKeerthy LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, 155f0168a9bSKeerthy 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, 156f0168a9bSKeerthy LP87565_REG_BUCK0_CTRL_1, 157f0168a9bSKeerthy LP87565_BUCK_CTRL_1_EN, 3800, 158f0168a9bSKeerthy buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 159f0168a9bSKeerthy LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, 160f0168a9bSKeerthy 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, 161f0168a9bSKeerthy LP87565_REG_BUCK1_CTRL_1, 162f0168a9bSKeerthy LP87565_BUCK_CTRL_1_EN, 3800, 163f0168a9bSKeerthy buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), 164f0168a9bSKeerthy LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, 165f0168a9bSKeerthy 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, 166f0168a9bSKeerthy LP87565_REG_BUCK2_CTRL_1, 167f0168a9bSKeerthy LP87565_BUCK_CTRL_1_EN, 3800, 168f0168a9bSKeerthy buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), 169f0168a9bSKeerthy LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, 170f0168a9bSKeerthy 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, 171f0168a9bSKeerthy LP87565_REG_BUCK3_CTRL_1, 172f0168a9bSKeerthy LP87565_BUCK_CTRL_1_EN, 3800, 173f0168a9bSKeerthy buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), 174f0168a9bSKeerthy LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, 175f0168a9bSKeerthy 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, 176f0168a9bSKeerthy LP87565_REG_BUCK0_CTRL_1, 177f0168a9bSKeerthy LP87565_BUCK_CTRL_1_EN, 3800, 178f0168a9bSKeerthy buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), 179f0168a9bSKeerthy LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, 180f0168a9bSKeerthy 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, 181f0168a9bSKeerthy LP87565_REG_BUCK2_CTRL_1, 182f0168a9bSKeerthy LP87565_BUCK_CTRL_1_EN, 3800, 183f0168a9bSKeerthy buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), 184f0168a9bSKeerthy }; 185f0168a9bSKeerthy 186f0168a9bSKeerthy static int lp87565_regulator_probe(struct platform_device *pdev) 187f0168a9bSKeerthy { 188f0168a9bSKeerthy struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); 189f0168a9bSKeerthy struct regulator_config config = { }; 190f0168a9bSKeerthy struct regulator_dev *rdev; 191f0168a9bSKeerthy int i, min_idx = LP87565_BUCK_1, max_idx = LP87565_BUCK_3; 192f0168a9bSKeerthy 193f0168a9bSKeerthy platform_set_drvdata(pdev, lp87565); 194f0168a9bSKeerthy 195f0168a9bSKeerthy config.dev = &pdev->dev; 196f0168a9bSKeerthy config.dev->of_node = lp87565->dev->of_node; 197f0168a9bSKeerthy config.driver_data = lp87565; 198f0168a9bSKeerthy config.regmap = lp87565->regmap; 199f0168a9bSKeerthy 200f0168a9bSKeerthy if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) { 201f0168a9bSKeerthy min_idx = LP87565_BUCK_10; 202f0168a9bSKeerthy max_idx = LP87565_BUCK_23; 203f0168a9bSKeerthy } 204f0168a9bSKeerthy 205f0168a9bSKeerthy for (i = min_idx; i <= max_idx; i++) { 206f0168a9bSKeerthy rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, 207f0168a9bSKeerthy &config); 208f0168a9bSKeerthy if (IS_ERR(rdev)) { 209f0168a9bSKeerthy dev_err(lp87565->dev, "failed to register %s regulator\n", 210f0168a9bSKeerthy pdev->name); 211f0168a9bSKeerthy return PTR_ERR(rdev); 212f0168a9bSKeerthy } 213f0168a9bSKeerthy } 214f0168a9bSKeerthy 215f0168a9bSKeerthy return 0; 216f0168a9bSKeerthy } 217f0168a9bSKeerthy 218f0168a9bSKeerthy static const struct platform_device_id lp87565_regulator_id_table[] = { 219f0168a9bSKeerthy { "lp87565-regulator", }, 220f0168a9bSKeerthy { "lp87565-q1-regulator", }, 221f0168a9bSKeerthy { /* sentinel */ } 222f0168a9bSKeerthy }; 223f0168a9bSKeerthy MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); 224f0168a9bSKeerthy 225f0168a9bSKeerthy static struct platform_driver lp87565_regulator_driver = { 226f0168a9bSKeerthy .driver = { 227f0168a9bSKeerthy .name = "lp87565-pmic", 228f0168a9bSKeerthy }, 229f0168a9bSKeerthy .probe = lp87565_regulator_probe, 230f0168a9bSKeerthy .id_table = lp87565_regulator_id_table, 231f0168a9bSKeerthy }; 232f0168a9bSKeerthy module_platform_driver(lp87565_regulator_driver); 233f0168a9bSKeerthy 234f0168a9bSKeerthy MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 235f0168a9bSKeerthy MODULE_DESCRIPTION("LP87565 voltage regulator driver"); 236f0168a9bSKeerthy MODULE_LICENSE("GPL v2"); 237