// SPDX-License-Identifier: GPL-2.0 // // regulator driver for the PF1550 // // Copyright (C) 2016 Freescale Semiconductor, Inc. // Robin Gong // // Portions Copyright (c) 2025 Savoir-faire Linux Inc. // Samuel Kayode // #include #include #include #include #include #include #include #define PF1550_REGULATOR_IRQ_NR 11 #define PF1550_MAX_REGULATOR 7 struct pf1550_desc { struct regulator_desc desc; unsigned char stby_reg; unsigned char stby_mask; unsigned char stby_enable_reg; unsigned char stby_enable_mask; }; struct pf1550_regulator_info { struct device *dev; const struct pf1550_ddata *pf1550; struct pf1550_desc regulator_descs[PF1550_MAX_REGULATOR]; struct regulator_dev *rdevs[PF1550_MAX_REGULATOR]; }; static const int pf1550_sw12_volts[] = { 1100000, 1200000, 1350000, 1500000, 1800000, 2500000, 3000000, 3300000, }; static const int pf1550_ldo13_volts[] = { 750000, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000, }; static int pf1550_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { int id = rdev_get_id(rdev); unsigned int ramp_bits = 0; int ret; if (id > PF1550_VREFDDR) return -EACCES; if (ramp_delay < 0 || ramp_delay > 6250) return -EINVAL; ramp_delay = 6250 / ramp_delay; ramp_bits = ramp_delay >> 1; ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg + 4, 0x10, ramp_bits << 4); if (ret < 0) dev_err(&rdev->dev, "ramp failed, err %d\n", ret); return ret; } static int pf1550_set_suspend_enable(struct regulator_dev *rdev) { const struct pf1550_desc *desc = container_of_const(rdev->desc, struct pf1550_desc, desc); unsigned int val = desc->stby_enable_mask; return regmap_update_bits(rdev->regmap, desc->stby_enable_reg, desc->stby_enable_mask, val); } static int pf1550_set_suspend_disable(struct regulator_dev *rdev) { const struct pf1550_desc *desc = container_of_const(rdev->desc, struct pf1550_desc, desc); return regmap_update_bits(rdev->regmap, desc->stby_enable_reg, desc->stby_enable_mask, 0); } static int pf1550_buck_set_table_suspend_voltage(struct regulator_dev *rdev, int uV) { const struct pf1550_desc *desc = container_of_const(rdev->desc, struct pf1550_desc, desc); int ret; ret = regulator_map_voltage_ascend(rdev, uV, uV); if (ret < 0) { dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV); return ret; } return regmap_update_bits(rdev->regmap, desc->stby_reg, desc->stby_mask, ret); } static int pf1550_buck_set_linear_suspend_voltage(struct regulator_dev *rdev, int uV) { const struct pf1550_desc *desc = container_of_const(rdev->desc, struct pf1550_desc, desc); int ret; ret = regulator_map_voltage_linear(rdev, uV, uV); if (ret < 0) { dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV); return ret; } return regmap_update_bits(rdev->regmap, desc->stby_reg, desc->stby_mask, ret); } static const struct regulator_ops pf1550_sw1_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_enable = pf1550_set_suspend_enable, .set_suspend_disable = pf1550_set_suspend_disable, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_table, .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_suspend_voltage = pf1550_buck_set_table_suspend_voltage, .map_voltage = regulator_map_voltage_ascend, .set_ramp_delay = pf1550_set_ramp_delay, }; static const struct regulator_ops pf1550_sw2_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_enable = pf1550_set_suspend_enable, .set_suspend_disable = pf1550_set_suspend_disable, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear, .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_suspend_voltage = pf1550_buck_set_linear_suspend_voltage, .map_voltage = regulator_map_voltage_linear, .set_ramp_delay = pf1550_set_ramp_delay, }; static const struct regulator_ops pf1550_ldo1_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_enable = pf1550_set_suspend_enable, .set_suspend_disable = pf1550_set_suspend_disable, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, }; static const struct regulator_ops pf1550_ldo2_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_enable = pf1550_set_suspend_enable, .set_suspend_disable = pf1550_set_suspend_disable, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .map_voltage = regulator_map_voltage_linear, }; static const struct regulator_ops pf1550_fixed_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_enable = pf1550_set_suspend_enable, .set_suspend_disable = pf1550_set_suspend_disable, .is_enabled = regulator_is_enabled_regmap, .list_voltage = regulator_list_voltage_linear, }; #define PF_VREF(_chip, match, _name, voltage) { \ .desc = { \ .name = #_name, \ .of_match = of_match_ptr(match), \ .regulators_node = of_match_ptr("regulators"), \ .n_voltages = 1, \ .ops = &pf1550_fixed_ops, \ .type = REGULATOR_VOLTAGE, \ .id = _chip ## _ ## _name, \ .owner = THIS_MODULE, \ .min_uV = (voltage), \ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .enable_mask = 0x1, \ }, \ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .stby_enable_mask = 0x2, \ } #define PF_SW(_chip, match, _name, min, max, mask, step) { \ .desc = { \ .name = #_name, \ .of_match = of_match_ptr(match), \ .regulators_node = of_match_ptr("regulators"), \ .n_voltages = ((max) - (min)) / (step) + 1, \ .ops = &pf1550_sw2_ops, \ .type = REGULATOR_VOLTAGE, \ .id = _chip ## _ ## _name, \ .owner = THIS_MODULE, \ .min_uV = (min), \ .uV_step = (step), \ .linear_min_sel = 0, \ .vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \ .vsel_mask = (mask), \ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .enable_mask = 0x1, \ }, \ .stby_reg = _chip ## _PMIC_REG_ ## _name ## _STBY_VOLT, \ .stby_mask = (mask), \ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .stby_enable_mask = 0x2, \ } #define PF_LDO1(_chip, match, _name, mask, voltages) { \ .desc = { \ .name = #_name, \ .of_match = of_match_ptr(match), \ .regulators_node = of_match_ptr("regulators"), \ .n_voltages = ARRAY_SIZE(voltages), \ .ops = &pf1550_ldo1_ops, \ .type = REGULATOR_VOLTAGE, \ .id = _chip ## _ ## _name, \ .owner = THIS_MODULE, \ .volt_table = voltages, \ .vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \ .vsel_mask = (mask), \ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .enable_mask = 0x1, \ }, \ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .stby_enable_mask = 0x2, \ } #define PF_LDO2(_chip, match, _name, mask, min, max, step) { \ .desc = { \ .name = #_name, \ .of_match = of_match_ptr(match), \ .regulators_node = of_match_ptr("regulators"), \ .n_voltages = ((max) - (min)) / (step) + 1, \ .ops = &pf1550_ldo2_ops, \ .type = REGULATOR_VOLTAGE, \ .id = _chip ## _ ## _name, \ .owner = THIS_MODULE, \ .min_uV = (min), \ .uV_step = (step), \ .linear_min_sel = 0, \ .vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \ .vsel_mask = (mask), \ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .enable_mask = 0x1, \ }, \ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \ .stby_enable_mask = 0x2, \ } static struct pf1550_desc pf1550_regulators[] = { PF_SW(PF1550, "sw1", SW1, 600000, 1387500, 0x3f, 12500), PF_SW(PF1550, "sw2", SW2, 600000, 1387500, 0x3f, 12500), PF_SW(PF1550, "sw3", SW3, 1800000, 3300000, 0xf, 100000), PF_VREF(PF1550, "vrefddr", VREFDDR, 1200000), PF_LDO1(PF1550, "ldo1", LDO1, 0x1f, pf1550_ldo13_volts), PF_LDO2(PF1550, "ldo2", LDO2, 0xf, 1800000, 3300000, 100000), PF_LDO1(PF1550, "ldo3", LDO3, 0x1f, pf1550_ldo13_volts), }; static irqreturn_t pf1550_regulator_irq_handler(int irq, void *data) { struct pf1550_regulator_info *info = data; struct device *dev = info->dev; struct platform_device *pdev = to_platform_device(dev); int i, irq_type = -1; unsigned int event; for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++) if (irq == platform_get_irq(pdev, i)) irq_type = i; switch (irq_type) { /* The _LS interrupts indicate over-current event. The _HS interrupts * which are more accurate and can detect catastrophic faults, issue * an error event. The current limit FAULT interrupt is similar to the * _HS' */ case PF1550_PMIC_IRQ_SW1_LS: case PF1550_PMIC_IRQ_SW2_LS: case PF1550_PMIC_IRQ_SW3_LS: event = REGULATOR_EVENT_OVER_CURRENT_WARN; for (i = 0; i < PF1550_MAX_REGULATOR; i++) if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3")) regulator_notifier_call_chain(info->rdevs[i], event, NULL); break; case PF1550_PMIC_IRQ_SW1_HS: case PF1550_PMIC_IRQ_SW2_HS: case PF1550_PMIC_IRQ_SW3_HS: event = REGULATOR_EVENT_OVER_CURRENT; for (i = 0; i < PF1550_MAX_REGULATOR; i++) if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3")) regulator_notifier_call_chain(info->rdevs[i], event, NULL); break; case PF1550_PMIC_IRQ_LDO1_FAULT: case PF1550_PMIC_IRQ_LDO2_FAULT: case PF1550_PMIC_IRQ_LDO3_FAULT: event = REGULATOR_EVENT_OVER_CURRENT; for (i = 0; i < PF1550_MAX_REGULATOR; i++) if (!strcmp(rdev_get_name(info->rdevs[i]), "LDO3")) regulator_notifier_call_chain(info->rdevs[i], event, NULL); break; case PF1550_PMIC_IRQ_TEMP_110: case PF1550_PMIC_IRQ_TEMP_125: event = REGULATOR_EVENT_OVER_TEMP; for (i = 0; i < PF1550_MAX_REGULATOR; i++) regulator_notifier_call_chain(info->rdevs[i], event, NULL); break; default: dev_err(dev, "regulator interrupt: irq %d occurred\n", irq_type); } return IRQ_HANDLED; } static int pf1550_regulator_probe(struct platform_device *pdev) { const struct pf1550_ddata *pf1550 = dev_get_drvdata(pdev->dev.parent); struct regulator_config config = { }; struct pf1550_regulator_info *info; int i, irq = -1, ret = 0; info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; config.regmap = dev_get_regmap(pf1550->dev, NULL); if (!config.regmap) return dev_err_probe(&pdev->dev, -ENODEV, "failed to get parent regmap\n"); config.dev = pf1550->dev; config.regmap = pf1550->regmap; info->dev = &pdev->dev; info->pf1550 = pf1550; memcpy(info->regulator_descs, pf1550_regulators, sizeof(info->regulator_descs)); for (i = 0; i < ARRAY_SIZE(pf1550_regulators); i++) { struct regulator_desc *desc; desc = &info->regulator_descs[i].desc; if ((desc->id == PF1550_SW2 && !pf1550->dvs2_enable) || (desc->id == PF1550_SW1 && !pf1550->dvs1_enable)) { /* OTP_SW2_DVS_ENB == 1? or OTP_SW1_DVS_ENB == 1? */ desc->volt_table = pf1550_sw12_volts; desc->n_voltages = ARRAY_SIZE(pf1550_sw12_volts); desc->ops = &pf1550_sw1_ops; } info->rdevs[i] = devm_regulator_register(&pdev->dev, desc, &config); if (IS_ERR(info->rdevs[i])) return dev_err_probe(&pdev->dev, PTR_ERR(info->rdevs[i]), "failed to initialize regulator-%d\n", i); } platform_set_drvdata(pdev, info); for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++) { irq = platform_get_irq(pdev, i); if (irq < 0) return irq; ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, pf1550_regulator_irq_handler, IRQF_NO_SUSPEND, "pf1550-regulator", info); if (ret) return dev_err_probe(&pdev->dev, ret, "failed: irq request (IRQ: %d)\n", i); } return 0; } static const struct platform_device_id pf1550_regulator_id[] = { { "pf1550-regulator", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, pf1550_regulator_id); static struct platform_driver pf1550_regulator_driver = { .driver = { .name = "pf1550-regulator", }, .probe = pf1550_regulator_probe, .id_table = pf1550_regulator_id, }; module_platform_driver(pf1550_regulator_driver); MODULE_DESCRIPTION("NXP PF1550 regulator driver"); MODULE_AUTHOR("Robin Gong "); MODULE_LICENSE("GPL");