// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 ROHM Semiconductors // bd71837-regulator.c ROHM BD71837MWV regulator driver #include #include #include #include #include #include #include #include #include #include #include #include struct bd71837_pmic { struct regulator_desc descs[BD71837_REGULATOR_CNT]; struct bd71837 *mfd; struct platform_device *pdev; struct regulator_dev *rdev[BD71837_REGULATOR_CNT]; }; /* * BUCK1/2/3/4 * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting * 00: 10.00mV/usec 10mV 1uS * 01: 5.00mV/usec 10mV 2uS * 10: 2.50mV/usec 10mV 4uS * 11: 1.25mV/usec 10mV 8uS */ static int bd71837_buck1234_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { struct bd71837_pmic *pmic = rdev_get_drvdata(rdev); struct bd71837 *mfd = pmic->mfd; int id = rdev->desc->id; unsigned int ramp_value = BUCK_RAMPRATE_10P00MV; dev_dbg(&pmic->pdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1, ramp_delay); switch (ramp_delay) { case 1 ... 1250: ramp_value = BUCK_RAMPRATE_1P25MV; break; case 1251 ... 2500: ramp_value = BUCK_RAMPRATE_2P50MV; break; case 2501 ... 5000: ramp_value = BUCK_RAMPRATE_5P00MV; break; case 5001 ... 10000: ramp_value = BUCK_RAMPRATE_10P00MV; break; default: ramp_value = BUCK_RAMPRATE_10P00MV; dev_err(&pmic->pdev->dev, "%s: ramp_delay: %d not supported, setting 10000mV//us\n", rdev->desc->name, ramp_delay); } return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id, BUCK_RAMPRATE_MASK, ramp_value << 6); } /* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed. * Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage * is changed. Hence we return -EBUSY for these if voltage is changed * when BUCK/LDO is enabled. */ static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev, unsigned int sel) { if (regulator_is_enabled_regmap(rdev)) return -EBUSY; return regulator_set_voltage_sel_regmap(rdev, sel); } static struct regulator_ops bd71837_ldo_regulator_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear_range, .set_voltage_sel = bd71837_set_voltage_sel_restricted, .get_voltage_sel = regulator_get_voltage_sel_regmap, }; static struct regulator_ops bd71837_ldo_regulator_nolinear_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_table, .set_voltage_sel = bd71837_set_voltage_sel_restricted, .get_voltage_sel = regulator_get_voltage_sel_regmap, }; static struct regulator_ops bd71837_buck_regulator_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear_range, .set_voltage_sel = bd71837_set_voltage_sel_restricted, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, }; static struct regulator_ops bd71837_buck_regulator_nolinear_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_table, .set_voltage_sel = bd71837_set_voltage_sel_restricted, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, }; static struct regulator_ops bd71837_buck1234_regulator_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear_range, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = bd71837_buck1234_set_ramp_delay, }; /* * BUCK1/2/3/4 * 0.70 to 1.30V (10mV step) */ static const struct regulator_linear_range bd71837_buck1234_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000), REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0), }; /* * BUCK5 * 0.9V to 1.35V () */ static const struct regulator_linear_range bd71837_buck5_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000), REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000), REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000), }; /* * BUCK6 * 3.0V to 3.3V (step 100mV) */ static const struct regulator_linear_range bd71837_buck6_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000), }; /* * BUCK7 * 000 = 1.605V * 001 = 1.695V * 010 = 1.755V * 011 = 1.8V (Initial) * 100 = 1.845V * 101 = 1.905V * 110 = 1.95V * 111 = 1.995V */ static const unsigned int buck_7_volts[] = { 1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000 }; /* * BUCK8 * 0.8V to 1.40V (step 10mV) */ static const struct regulator_linear_range bd71837_buck8_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000), REGULATOR_LINEAR_RANGE(1400000, 0x3D, 0x3F, 0), }; /* * LDO1 * 3.0 to 3.3V (100mV step) */ static const struct regulator_linear_range bd71837_ldo1_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000), }; /* * LDO2 * 0.8 or 0.9V */ static const unsigned int ldo_2_volts[] = { 900000, 800000 }; /* * LDO3 * 1.8 to 3.3V (100mV step) */ static const struct regulator_linear_range bd71837_ldo3_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000), }; /* * LDO4 * 0.9 to 1.8V (100mV step) */ static const struct regulator_linear_range bd71837_ldo4_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000), REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0), }; /* * LDO5 * 1.8 to 3.3V (100mV step) */ static const struct regulator_linear_range bd71837_ldo5_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000), }; /* * LDO6 * 0.9 to 1.8V (100mV step) */ static const struct regulator_linear_range bd71837_ldo6_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000), REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0), }; /* * LDO7 * 1.8 to 3.3V (100mV step) */ static const struct regulator_linear_range bd71837_ldo7_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000), }; static const struct regulator_desc bd71837_regulators[] = { { .name = "buck1", .of_match = of_match_ptr("BUCK1"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK1, .ops = &bd71837_buck1234_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK1_VOLTAGE_NUM, .linear_ranges = bd71837_buck1234_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges), .vsel_reg = BD71837_REG_BUCK1_VOLT_RUN, .vsel_mask = BUCK1_RUN_MASK, .enable_reg = BD71837_REG_BUCK1_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck2", .of_match = of_match_ptr("BUCK2"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK2, .ops = &bd71837_buck1234_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK2_VOLTAGE_NUM, .linear_ranges = bd71837_buck1234_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges), .vsel_reg = BD71837_REG_BUCK2_VOLT_RUN, .vsel_mask = BUCK2_RUN_MASK, .enable_reg = BD71837_REG_BUCK2_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck3", .of_match = of_match_ptr("BUCK3"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK3, .ops = &bd71837_buck1234_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK3_VOLTAGE_NUM, .linear_ranges = bd71837_buck1234_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges), .vsel_reg = BD71837_REG_BUCK3_VOLT_RUN, .vsel_mask = BUCK3_RUN_MASK, .enable_reg = BD71837_REG_BUCK3_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck4", .of_match = of_match_ptr("BUCK4"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK4, .ops = &bd71837_buck1234_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK4_VOLTAGE_NUM, .linear_ranges = bd71837_buck1234_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges), .vsel_reg = BD71837_REG_BUCK4_VOLT_RUN, .vsel_mask = BUCK4_RUN_MASK, .enable_reg = BD71837_REG_BUCK4_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck5", .of_match = of_match_ptr("BUCK5"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK5, .ops = &bd71837_buck_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK5_VOLTAGE_NUM, .linear_ranges = bd71837_buck5_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck5_voltage_ranges), .vsel_reg = BD71837_REG_BUCK5_VOLT, .vsel_mask = BUCK5_MASK, .enable_reg = BD71837_REG_BUCK5_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck6", .of_match = of_match_ptr("BUCK6"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK6, .ops = &bd71837_buck_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK6_VOLTAGE_NUM, .linear_ranges = bd71837_buck6_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck6_voltage_ranges), .vsel_reg = BD71837_REG_BUCK6_VOLT, .vsel_mask = BUCK6_MASK, .enable_reg = BD71837_REG_BUCK6_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck7", .of_match = of_match_ptr("BUCK7"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK7, .ops = &bd71837_buck_regulator_nolinear_ops, .type = REGULATOR_VOLTAGE, .volt_table = &buck_7_volts[0], .n_voltages = ARRAY_SIZE(buck_7_volts), .vsel_reg = BD71837_REG_BUCK7_VOLT, .vsel_mask = BUCK7_MASK, .enable_reg = BD71837_REG_BUCK7_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "buck8", .of_match = of_match_ptr("BUCK8"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_BUCK8, .ops = &bd71837_buck_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_BUCK8_VOLTAGE_NUM, .linear_ranges = bd71837_buck8_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_buck8_voltage_ranges), .vsel_reg = BD71837_REG_BUCK8_VOLT, .vsel_mask = BUCK8_MASK, .enable_reg = BD71837_REG_BUCK8_CTRL, .enable_mask = BD71837_BUCK_EN, .owner = THIS_MODULE, }, { .name = "ldo1", .of_match = of_match_ptr("LDO1"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO1, .ops = &bd71837_ldo_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_LDO1_VOLTAGE_NUM, .linear_ranges = bd71837_ldo1_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_ldo1_voltage_ranges), .vsel_reg = BD71837_REG_LDO1_VOLT, .vsel_mask = LDO1_MASK, .enable_reg = BD71837_REG_LDO1_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, { .name = "ldo2", .of_match = of_match_ptr("LDO2"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO2, .ops = &bd71837_ldo_regulator_nolinear_ops, .type = REGULATOR_VOLTAGE, .volt_table = &ldo_2_volts[0], .vsel_reg = BD71837_REG_LDO2_VOLT, .vsel_mask = LDO2_MASK, .n_voltages = ARRAY_SIZE(ldo_2_volts), .n_voltages = BD71837_LDO2_VOLTAGE_NUM, .enable_reg = BD71837_REG_LDO2_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, { .name = "ldo3", .of_match = of_match_ptr("LDO3"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO3, .ops = &bd71837_ldo_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_LDO3_VOLTAGE_NUM, .linear_ranges = bd71837_ldo3_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_ldo3_voltage_ranges), .vsel_reg = BD71837_REG_LDO3_VOLT, .vsel_mask = LDO3_MASK, .enable_reg = BD71837_REG_LDO3_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, { .name = "ldo4", .of_match = of_match_ptr("LDO4"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO4, .ops = &bd71837_ldo_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_LDO4_VOLTAGE_NUM, .linear_ranges = bd71837_ldo4_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_ldo4_voltage_ranges), .vsel_reg = BD71837_REG_LDO4_VOLT, .vsel_mask = LDO4_MASK, .enable_reg = BD71837_REG_LDO4_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, { .name = "ldo5", .of_match = of_match_ptr("LDO5"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO5, .ops = &bd71837_ldo_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_LDO5_VOLTAGE_NUM, .linear_ranges = bd71837_ldo5_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_voltage_ranges), /* LDO5 is supplied by buck6 */ .supply_name = "buck6", .vsel_reg = BD71837_REG_LDO5_VOLT, .vsel_mask = LDO5_MASK, .enable_reg = BD71837_REG_LDO5_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, { .name = "ldo6", .of_match = of_match_ptr("LDO6"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO6, .ops = &bd71837_ldo_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_LDO6_VOLTAGE_NUM, .linear_ranges = bd71837_ldo6_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_ldo6_voltage_ranges), /* LDO6 is supplied by buck7 */ .supply_name = "buck7", .vsel_reg = BD71837_REG_LDO6_VOLT, .vsel_mask = LDO6_MASK, .enable_reg = BD71837_REG_LDO6_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, { .name = "ldo7", .of_match = of_match_ptr("LDO7"), .regulators_node = of_match_ptr("regulators"), .id = BD71837_LDO7, .ops = &bd71837_ldo_regulator_ops, .type = REGULATOR_VOLTAGE, .n_voltages = BD71837_LDO7_VOLTAGE_NUM, .linear_ranges = bd71837_ldo7_voltage_ranges, .n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_voltage_ranges), .vsel_reg = BD71837_REG_LDO7_VOLT, .vsel_mask = LDO7_MASK, .enable_reg = BD71837_REG_LDO7_VOLT, .enable_mask = BD71837_LDO_EN, .owner = THIS_MODULE, }, }; struct reg_init { unsigned int reg; unsigned int mask; }; static int bd71837_probe(struct platform_device *pdev) { struct bd71837_pmic *pmic; struct regulator_config config = { 0 }; struct reg_init pmic_regulator_inits[] = { { .reg = BD71837_REG_BUCK1_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK2_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK3_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK4_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK5_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK6_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK7_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_BUCK8_CTRL, .mask = BD71837_BUCK_SEL, }, { .reg = BD71837_REG_LDO1_VOLT, .mask = BD71837_LDO_SEL, }, { .reg = BD71837_REG_LDO2_VOLT, .mask = BD71837_LDO_SEL, }, { .reg = BD71837_REG_LDO3_VOLT, .mask = BD71837_LDO_SEL, }, { .reg = BD71837_REG_LDO4_VOLT, .mask = BD71837_LDO_SEL, }, { .reg = BD71837_REG_LDO5_VOLT, .mask = BD71837_LDO_SEL, }, { .reg = BD71837_REG_LDO6_VOLT, .mask = BD71837_LDO_SEL, }, { .reg = BD71837_REG_LDO7_VOLT, .mask = BD71837_LDO_SEL, } }; int i, err; pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); if (!pmic) return -ENOMEM; memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs)); pmic->pdev = pdev; pmic->mfd = dev_get_drvdata(pdev->dev.parent); if (!pmic->mfd) { dev_err(&pdev->dev, "No MFD driver data\n"); err = -EINVAL; goto err; } platform_set_drvdata(pdev, pmic); /* Register LOCK release */ err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK, (REGLOCK_PWRSEQ | REGLOCK_VREG), 0); if (err) { dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err); goto err; } else { dev_dbg(&pmic->pdev->dev, "Unlocked lock register 0x%x\n", BD71837_REG_REGLOCK); } /* * There is a HW quirk in BD71837. The shutdown sequence timings for * bucks/LDOs which are controlled via register interface are changed. * At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the * beginning of shut-down sequence. As bucks 6 and 7 are parent * supplies for LDO5 and LDO6 - this causes LDO5/6 voltage * monitoring to errorneously detect under voltage and force PMIC to * emergency state instead of poweroff. In order to avoid this we * disable voltage monitoring for LDO5 and LDO6 */ err = regmap_update_bits(pmic->mfd->regmap, BD718XX_REG_MVRFLTMASK2, BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80, BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80); if (err) { dev_err(&pmic->pdev->dev, "Failed to disable voltage monitoring\n"); goto err; } for (i = 0; i < ARRAY_SIZE(pmic_regulator_inits); i++) { struct regulator_desc *desc; struct regulator_dev *rdev; desc = &pmic->descs[i]; config.dev = pdev->dev.parent; config.driver_data = pmic; config.regmap = pmic->mfd->regmap; rdev = devm_regulator_register(&pdev->dev, desc, &config); if (IS_ERR(rdev)) { dev_err(pmic->mfd->dev, "failed to register %s regulator\n", desc->name); err = PTR_ERR(rdev); goto err; } /* Regulator register gets the regulator constraints and * applies them (set_machine_constraints). This should have * turned the control register(s) to correct values and we * can now switch the control from PMIC state machine to the * register interface */ err = regmap_update_bits(pmic->mfd->regmap, pmic_regulator_inits[i].reg, pmic_regulator_inits[i].mask, 0xFFFFFFFF); if (err) { dev_err(&pmic->pdev->dev, "Failed to write BUCK/LDO SEL bit for (%s)\n", desc->name); goto err; } pmic->rdev[i] = rdev; } err: return err; } static struct platform_driver bd71837_regulator = { .driver = { .name = "bd71837-pmic", }, .probe = bd71837_probe, }; module_platform_driver(bd71837_regulator); MODULE_AUTHOR("Matti Vaittinen "); MODULE_DESCRIPTION("BD71837 voltage regulator driver"); MODULE_LICENSE("GPL");