| // SPDX-License-Identifier: GPL-2.0-only |
| // |
| // Copyright (C) 2020 MediaTek Inc. |
| // |
| // Author: Gene Chen <gene_chen@richtek.com> |
| |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| |
| #include <dt-bindings/regulator/mediatek,mt6360-regulator.h> |
| |
| enum { |
| MT6360_REGULATOR_BUCK1 = 0, |
| MT6360_REGULATOR_BUCK2, |
| MT6360_REGULATOR_LDO6, |
| MT6360_REGULATOR_LDO7, |
| MT6360_REGULATOR_LDO1, |
| MT6360_REGULATOR_LDO2, |
| MT6360_REGULATOR_LDO3, |
| MT6360_REGULATOR_LDO5, |
| MT6360_REGULATOR_MAX, |
| }; |
| |
| struct mt6360_irq_mapping { |
| const char *name; |
| irq_handler_t handler; |
| }; |
| |
| struct mt6360_regulator_desc { |
| const struct regulator_desc desc; |
| unsigned int mode_reg; |
| unsigned int mode_mask; |
| unsigned int state_reg; |
| unsigned int state_mask; |
| const struct mt6360_irq_mapping *irq_tables; |
| int irq_table_size; |
| }; |
| |
| struct mt6360_regulator_data { |
| struct device *dev; |
| struct regmap *regmap; |
| }; |
| |
| static irqreturn_t mt6360_pgb_event_handler(int irq, void *data) |
| { |
| struct regulator_dev *rdev = data; |
| |
| regulator_notifier_call_chain(rdev, REGULATOR_EVENT_FAIL, NULL); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mt6360_oc_event_handler(int irq, void *data) |
| { |
| struct regulator_dev *rdev = data; |
| |
| regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_CURRENT, NULL); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mt6360_ov_event_handler(int irq, void *data) |
| { |
| struct regulator_dev *rdev = data; |
| |
| regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mt6360_uv_event_handler(int irq, void *data) |
| { |
| struct regulator_dev *rdev = data; |
| |
| regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL); |
| return IRQ_HANDLED; |
| } |
| |
| static const struct mt6360_irq_mapping buck1_irq_tbls[] = { |
| { "buck1_pgb_evt", mt6360_pgb_event_handler }, |
| { "buck1_oc_evt", mt6360_oc_event_handler }, |
| { "buck1_ov_evt", mt6360_ov_event_handler }, |
| { "buck1_uv_evt", mt6360_uv_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping buck2_irq_tbls[] = { |
| { "buck2_pgb_evt", mt6360_pgb_event_handler }, |
| { "buck2_oc_evt", mt6360_oc_event_handler }, |
| { "buck2_ov_evt", mt6360_ov_event_handler }, |
| { "buck2_uv_evt", mt6360_uv_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping ldo6_irq_tbls[] = { |
| { "ldo6_pgb_evt", mt6360_pgb_event_handler }, |
| { "ldo6_oc_evt", mt6360_oc_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping ldo7_irq_tbls[] = { |
| { "ldo7_pgb_evt", mt6360_pgb_event_handler }, |
| { "ldo7_oc_evt", mt6360_oc_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping ldo1_irq_tbls[] = { |
| { "ldo1_pgb_evt", mt6360_pgb_event_handler }, |
| { "ldo1_oc_evt", mt6360_oc_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping ldo2_irq_tbls[] = { |
| { "ldo2_pgb_evt", mt6360_pgb_event_handler }, |
| { "ldo2_oc_evt", mt6360_oc_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping ldo3_irq_tbls[] = { |
| { "ldo3_pgb_evt", mt6360_pgb_event_handler }, |
| { "ldo3_oc_evt", mt6360_oc_event_handler }, |
| }; |
| |
| static const struct mt6360_irq_mapping ldo5_irq_tbls[] = { |
| { "ldo5_pgb_evt", mt6360_pgb_event_handler }, |
| { "ldo5_oc_evt", mt6360_oc_event_handler }, |
| }; |
| |
| static const struct linear_range buck_vout_ranges[] = { |
| REGULATOR_LINEAR_RANGE(300000, 0x00, 0xc7, 5000), |
| REGULATOR_LINEAR_RANGE(1300000, 0xc8, 0xff, 0), |
| }; |
| |
| static const struct linear_range ldo_vout_ranges1[] = { |
| REGULATOR_LINEAR_RANGE(500000, 0x00, 0x09, 10000), |
| REGULATOR_LINEAR_RANGE(600000, 0x0a, 0x10, 0), |
| REGULATOR_LINEAR_RANGE(610000, 0x11, 0x19, 10000), |
| REGULATOR_LINEAR_RANGE(700000, 0x1a, 0x20, 0), |
| REGULATOR_LINEAR_RANGE(710000, 0x21, 0x29, 10000), |
| REGULATOR_LINEAR_RANGE(800000, 0x2a, 0x30, 0), |
| REGULATOR_LINEAR_RANGE(810000, 0x31, 0x39, 10000), |
| REGULATOR_LINEAR_RANGE(900000, 0x3a, 0x40, 0), |
| REGULATOR_LINEAR_RANGE(910000, 0x41, 0x49, 10000), |
| REGULATOR_LINEAR_RANGE(1000000, 0x4a, 0x50, 0), |
| REGULATOR_LINEAR_RANGE(1010000, 0x51, 0x59, 10000), |
| REGULATOR_LINEAR_RANGE(1100000, 0x5a, 0x60, 0), |
| REGULATOR_LINEAR_RANGE(1110000, 0x61, 0x69, 10000), |
| REGULATOR_LINEAR_RANGE(1200000, 0x6a, 0x70, 0), |
| REGULATOR_LINEAR_RANGE(1210000, 0x71, 0x79, 10000), |
| REGULATOR_LINEAR_RANGE(1300000, 0x7a, 0x80, 0), |
| REGULATOR_LINEAR_RANGE(1310000, 0x81, 0x89, 10000), |
| REGULATOR_LINEAR_RANGE(1400000, 0x8a, 0x90, 0), |
| REGULATOR_LINEAR_RANGE(1410000, 0x91, 0x99, 10000), |
| REGULATOR_LINEAR_RANGE(1500000, 0x9a, 0xa0, 0), |
| REGULATOR_LINEAR_RANGE(1510000, 0xa1, 0xa9, 10000), |
| REGULATOR_LINEAR_RANGE(1600000, 0xaa, 0xb0, 0), |
| REGULATOR_LINEAR_RANGE(1610000, 0xb1, 0xb9, 10000), |
| REGULATOR_LINEAR_RANGE(1700000, 0xba, 0xc0, 0), |
| REGULATOR_LINEAR_RANGE(1710000, 0xc1, 0xc9, 10000), |
| REGULATOR_LINEAR_RANGE(1800000, 0xca, 0xd0, 0), |
| REGULATOR_LINEAR_RANGE(1810000, 0xd1, 0xd9, 10000), |
| REGULATOR_LINEAR_RANGE(1900000, 0xda, 0xe0, 0), |
| REGULATOR_LINEAR_RANGE(1910000, 0xe1, 0xe9, 10000), |
| REGULATOR_LINEAR_RANGE(2000000, 0xea, 0xf0, 0), |
| REGULATOR_LINEAR_RANGE(2010000, 0xf1, 0xf9, 10000), |
| REGULATOR_LINEAR_RANGE(2100000, 0xfa, 0xff, 0), |
| }; |
| |
| static const struct linear_range ldo_vout_ranges2[] = { |
| REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x09, 10000), |
| REGULATOR_LINEAR_RANGE(1300000, 0x0a, 0x10, 0), |
| REGULATOR_LINEAR_RANGE(1310000, 0x11, 0x19, 10000), |
| REGULATOR_LINEAR_RANGE(1400000, 0x1a, 0x1f, 0), |
| REGULATOR_LINEAR_RANGE(1500000, 0x20, 0x29, 10000), |
| REGULATOR_LINEAR_RANGE(1600000, 0x2a, 0x2f, 0), |
| REGULATOR_LINEAR_RANGE(1700000, 0x30, 0x39, 10000), |
| REGULATOR_LINEAR_RANGE(1800000, 0x3a, 0x40, 0), |
| REGULATOR_LINEAR_RANGE(1810000, 0x41, 0x49, 10000), |
| REGULATOR_LINEAR_RANGE(1900000, 0x4a, 0x4f, 0), |
| REGULATOR_LINEAR_RANGE(2000000, 0x50, 0x59, 10000), |
| REGULATOR_LINEAR_RANGE(2100000, 0x5a, 0x60, 0), |
| REGULATOR_LINEAR_RANGE(2110000, 0x61, 0x69, 10000), |
| REGULATOR_LINEAR_RANGE(2200000, 0x6a, 0x6f, 0), |
| REGULATOR_LINEAR_RANGE(2500000, 0x70, 0x79, 10000), |
| REGULATOR_LINEAR_RANGE(2600000, 0x7a, 0x7f, 0), |
| REGULATOR_LINEAR_RANGE(2700000, 0x80, 0x89, 10000), |
| REGULATOR_LINEAR_RANGE(2800000, 0x8a, 0x90, 0), |
| REGULATOR_LINEAR_RANGE(2810000, 0x91, 0x99, 10000), |
| REGULATOR_LINEAR_RANGE(2900000, 0x9a, 0xa0, 0), |
| REGULATOR_LINEAR_RANGE(2910000, 0xa1, 0xa9, 10000), |
| REGULATOR_LINEAR_RANGE(3000000, 0xaa, 0xb0, 0), |
| REGULATOR_LINEAR_RANGE(3010000, 0xb1, 0xb9, 10000), |
| REGULATOR_LINEAR_RANGE(3100000, 0xba, 0xc0, 0), |
| REGULATOR_LINEAR_RANGE(3110000, 0xc1, 0xc9, 10000), |
| REGULATOR_LINEAR_RANGE(3200000, 0xca, 0xcf, 0), |
| REGULATOR_LINEAR_RANGE(3300000, 0xd0, 0xd9, 10000), |
| REGULATOR_LINEAR_RANGE(3400000, 0xda, 0xe0, 0), |
| REGULATOR_LINEAR_RANGE(3410000, 0xe1, 0xe9, 10000), |
| REGULATOR_LINEAR_RANGE(3500000, 0xea, 0xf0, 0), |
| REGULATOR_LINEAR_RANGE(3510000, 0xf1, 0xf9, 10000), |
| REGULATOR_LINEAR_RANGE(3600000, 0xfa, 0xff, 0), |
| }; |
| |
| static const struct linear_range ldo_vout_ranges3[] = { |
| REGULATOR_LINEAR_RANGE(2700000, 0x00, 0x09, 10000), |
| REGULATOR_LINEAR_RANGE(2800000, 0x0a, 0x10, 0), |
| REGULATOR_LINEAR_RANGE(2810000, 0x11, 0x19, 10000), |
| REGULATOR_LINEAR_RANGE(2900000, 0x1a, 0x20, 0), |
| REGULATOR_LINEAR_RANGE(2910000, 0x21, 0x29, 10000), |
| REGULATOR_LINEAR_RANGE(3000000, 0x2a, 0x30, 0), |
| REGULATOR_LINEAR_RANGE(3010000, 0x31, 0x39, 10000), |
| REGULATOR_LINEAR_RANGE(3100000, 0x3a, 0x40, 0), |
| REGULATOR_LINEAR_RANGE(3110000, 0x41, 0x49, 10000), |
| REGULATOR_LINEAR_RANGE(3200000, 0x4a, 0x4f, 0), |
| REGULATOR_LINEAR_RANGE(3300000, 0x50, 0x59, 10000), |
| REGULATOR_LINEAR_RANGE(3400000, 0x5a, 0x60, 0), |
| REGULATOR_LINEAR_RANGE(3410000, 0x61, 0x69, 10000), |
| REGULATOR_LINEAR_RANGE(3500000, 0x6a, 0x70, 0), |
| REGULATOR_LINEAR_RANGE(3510000, 0x71, 0x79, 10000), |
| REGULATOR_LINEAR_RANGE(3600000, 0x7a, 0x7f, 0), |
| }; |
| |
| static int mt6360_regulator_set_mode(struct regulator_dev *rdev, |
| unsigned int mode) |
| { |
| const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc; |
| struct regmap *regmap = rdev_get_regmap(rdev); |
| int shift = ffs(rdesc->mode_mask) - 1; |
| unsigned int val; |
| int ret; |
| |
| switch (mode) { |
| case REGULATOR_MODE_NORMAL: |
| val = MT6360_OPMODE_NORMAL; |
| break; |
| case REGULATOR_MODE_STANDBY: |
| val = MT6360_OPMODE_ULP; |
| break; |
| case REGULATOR_MODE_IDLE: |
| val = MT6360_OPMODE_LP; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ret = regmap_update_bits(regmap, rdesc->mode_reg, rdesc->mode_mask, val << shift); |
| if (ret) { |
| dev_err(&rdev->dev, "%s: fail (%d)\n", __func__, ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static unsigned int mt6360_regulator_get_mode(struct regulator_dev *rdev) |
| { |
| const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc; |
| struct regmap *regmap = rdev_get_regmap(rdev); |
| int shift = ffs(rdesc->mode_mask) - 1; |
| unsigned int val; |
| int ret; |
| |
| ret = regmap_read(regmap, rdesc->mode_reg, &val); |
| if (ret) |
| return ret; |
| |
| val &= rdesc->mode_mask; |
| val >>= shift; |
| |
| switch (val) { |
| case MT6360_OPMODE_LP: |
| return REGULATOR_MODE_IDLE; |
| case MT6360_OPMODE_ULP: |
| return REGULATOR_MODE_STANDBY; |
| case MT6360_OPMODE_NORMAL: |
| return REGULATOR_MODE_NORMAL; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int mt6360_regulator_get_status(struct regulator_dev *rdev) |
| { |
| const struct mt6360_regulator_desc *rdesc = (struct mt6360_regulator_desc *)rdev->desc; |
| struct regmap *regmap = rdev_get_regmap(rdev); |
| unsigned int val; |
| int ret; |
| |
| ret = regmap_read(regmap, rdesc->state_reg, &val); |
| if (ret) |
| return ret; |
| |
| if (val & rdesc->state_mask) |
| return REGULATOR_STATUS_ON; |
| |
| return REGULATOR_STATUS_OFF; |
| } |
| |
| static const struct regulator_ops mt6360_regulator_ops = { |
| .list_voltage = regulator_list_voltage_linear_range, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .set_mode = mt6360_regulator_set_mode, |
| .get_mode = mt6360_regulator_get_mode, |
| .get_status = mt6360_regulator_get_status, |
| }; |
| |
| static unsigned int mt6360_regulator_of_map_mode(unsigned int hw_mode) |
| { |
| switch (hw_mode) { |
| case MT6360_OPMODE_NORMAL: |
| return REGULATOR_MODE_NORMAL; |
| case MT6360_OPMODE_LP: |
| return REGULATOR_MODE_IDLE; |
| case MT6360_OPMODE_ULP: |
| return REGULATOR_MODE_STANDBY; |
| default: |
| return REGULATOR_MODE_INVALID; |
| } |
| } |
| |
| #define MT6360_REGULATOR_DESC(_name, _sname, ereg, emask, vreg, vmask, \ |
| mreg, mmask, streg, stmask, vranges, \ |
| vcnts, offon_delay, irq_tbls) \ |
| { \ |
| .desc = { \ |
| .name = #_name, \ |
| .supply_name = #_sname, \ |
| .id = MT6360_REGULATOR_##_name, \ |
| .of_match = of_match_ptr(#_name), \ |
| .regulators_node = of_match_ptr("regulator"), \ |
| .of_map_mode = mt6360_regulator_of_map_mode, \ |
| .owner = THIS_MODULE, \ |
| .ops = &mt6360_regulator_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .vsel_reg = vreg, \ |
| .vsel_mask = vmask, \ |
| .enable_reg = ereg, \ |
| .enable_mask = emask, \ |
| .linear_ranges = vranges, \ |
| .n_linear_ranges = ARRAY_SIZE(vranges), \ |
| .n_voltages = vcnts, \ |
| .off_on_delay = offon_delay, \ |
| }, \ |
| .mode_reg = mreg, \ |
| .mode_mask = mmask, \ |
| .state_reg = streg, \ |
| .state_mask = stmask, \ |
| .irq_tables = irq_tbls, \ |
| .irq_table_size = ARRAY_SIZE(irq_tbls), \ |
| } |
| |
| static const struct mt6360_regulator_desc mt6360_regulator_descs[] = { |
| MT6360_REGULATOR_DESC(BUCK1, BUCK1_VIN, 0x117, 0x40, 0x110, 0xff, 0x117, 0x30, 0x117, 0x04, |
| buck_vout_ranges, 256, 0, buck1_irq_tbls), |
| MT6360_REGULATOR_DESC(BUCK2, BUCK2_VIN, 0x127, 0x40, 0x120, 0xff, 0x127, 0x30, 0x127, 0x04, |
| buck_vout_ranges, 256, 0, buck2_irq_tbls), |
| MT6360_REGULATOR_DESC(LDO6, LDO_VIN3, 0x137, 0x40, 0x13B, 0xff, 0x137, 0x30, 0x137, 0x04, |
| ldo_vout_ranges1, 256, 0, ldo6_irq_tbls), |
| MT6360_REGULATOR_DESC(LDO7, LDO_VIN3, 0x131, 0x40, 0x135, 0xff, 0x131, 0x30, 0x131, 0x04, |
| ldo_vout_ranges1, 256, 0, ldo7_irq_tbls), |
| MT6360_REGULATOR_DESC(LDO1, LDO_VIN1, 0x217, 0x40, 0x21B, 0xff, 0x217, 0x30, 0x217, 0x04, |
| ldo_vout_ranges2, 256, 0, ldo1_irq_tbls), |
| MT6360_REGULATOR_DESC(LDO2, LDO_VIN1, 0x211, 0x40, 0x215, 0xff, 0x211, 0x30, 0x211, 0x04, |
| ldo_vout_ranges2, 256, 0, ldo2_irq_tbls), |
| MT6360_REGULATOR_DESC(LDO3, LDO_VIN1, 0x205, 0x40, 0x209, 0xff, 0x205, 0x30, 0x205, 0x04, |
| ldo_vout_ranges2, 256, 100, ldo3_irq_tbls), |
| MT6360_REGULATOR_DESC(LDO5, LDO_VIN2, 0x20B, 0x40, 0x20F, 0x7f, 0x20B, 0x30, 0x20B, 0x04, |
| ldo_vout_ranges3, 128, 100, ldo5_irq_tbls), |
| }; |
| |
| static int mt6360_regulator_irq_register(struct platform_device *pdev, |
| struct regulator_dev *rdev, |
| const struct mt6360_irq_mapping *tbls, |
| int tbl_size) |
| { |
| int i, irq, ret; |
| |
| for (i = 0; i < tbl_size; i++) { |
| const struct mt6360_irq_mapping *irq_desc = tbls + i; |
| |
| irq = platform_get_irq_byname(pdev, irq_desc->name); |
| if (irq < 0) |
| return irq; |
| |
| ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, irq_desc->handler, 0, |
| irq_desc->name, rdev); |
| if (ret) { |
| dev_err(&pdev->dev, "Fail to request %s irq\n", irq_desc->name); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int mt6360_regulator_probe(struct platform_device *pdev) |
| { |
| struct mt6360_regulator_data *mrd; |
| struct regulator_config config = {}; |
| int i, ret; |
| |
| mrd = devm_kzalloc(&pdev->dev, sizeof(*mrd), GFP_KERNEL); |
| if (!mrd) |
| return -ENOMEM; |
| |
| mrd->dev = &pdev->dev; |
| |
| mrd->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
| if (!mrd->regmap) { |
| dev_err(&pdev->dev, "Failed to get parent regmap\n"); |
| return -ENODEV; |
| } |
| |
| config.dev = pdev->dev.parent; |
| config.driver_data = mrd; |
| config.regmap = mrd->regmap; |
| |
| for (i = 0; i < ARRAY_SIZE(mt6360_regulator_descs); i++) { |
| const struct mt6360_regulator_desc *rdesc = mt6360_regulator_descs + i; |
| struct regulator_dev *rdev; |
| |
| rdev = devm_regulator_register(&pdev->dev, &rdesc->desc, &config); |
| if (IS_ERR(rdev)) { |
| dev_err(&pdev->dev, "Failed to register %d regulator\n", i); |
| return PTR_ERR(rdev); |
| } |
| |
| ret = mt6360_regulator_irq_register(pdev, rdev, rdesc->irq_tables, |
| rdesc->irq_table_size); |
| if (ret) { |
| dev_err(&pdev->dev, "Failed to register %d regulator irqs\n", i); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id mt6360_regulator_id_table[] = { |
| { "mt6360-regulator", 0 }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(platform, mt6360_regulator_id_table); |
| |
| static struct platform_driver mt6360_regulator_driver = { |
| .driver = { |
| .name = "mt6360-regulator", |
| }, |
| .probe = mt6360_regulator_probe, |
| .id_table = mt6360_regulator_id_table, |
| }; |
| module_platform_driver(mt6360_regulator_driver); |
| |
| MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>"); |
| MODULE_DESCRIPTION("MT6360 Regulator Driver"); |
| MODULE_LICENSE("GPL v2"); |