/* * Copyright (c) 2016 MediaTek Inc. * Author: Chen Zhong * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #define MT6323_LDO_MODE_NORMAL 0 #define MT6323_LDO_MODE_LP 1 /* * MT6323 regulators' information * * @desc: standard fields of regulator description. * @qi: Mask for query enable signal status of regulators * @vselon_reg: Register sections for hardware control mode of bucks * @vselctrl_reg: Register for controlling the buck control mode. * @vselctrl_mask: Mask for query buck's voltage control mode. */ struct mt6323_regulator_info { struct regulator_desc desc; u32 qi; u32 vselon_reg; u32 vselctrl_reg; u32 vselctrl_mask; u32 modeset_reg; u32 modeset_mask; }; #define MT6323_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \ vosel, vosel_mask, voselon, vosel_ctrl) \ [MT6323_ID_##vreg] = { \ .desc = { \ .name = #vreg, \ .of_match = of_match_ptr(match), \ .ops = &mt6323_volt_range_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MT6323_ID_##vreg, \ .owner = THIS_MODULE, \ .n_voltages = (max - min)/step + 1, \ .linear_ranges = volt_ranges, \ .n_linear_ranges = ARRAY_SIZE(volt_ranges), \ .vsel_reg = vosel, \ .vsel_mask = vosel_mask, \ .enable_reg = enreg, \ .enable_mask = BIT(0), \ }, \ .qi = BIT(13), \ .vselon_reg = voselon, \ .vselctrl_reg = vosel_ctrl, \ .vselctrl_mask = BIT(1), \ } #define MT6323_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \ vosel_mask, _modeset_reg, _modeset_mask) \ [MT6323_ID_##vreg] = { \ .desc = { \ .name = #vreg, \ .of_match = of_match_ptr(match), \ .ops = &mt6323_volt_table_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MT6323_ID_##vreg, \ .owner = THIS_MODULE, \ .n_voltages = ARRAY_SIZE(ldo_volt_table), \ .volt_table = ldo_volt_table, \ .vsel_reg = vosel, \ .vsel_mask = vosel_mask, \ .enable_reg = enreg, \ .enable_mask = BIT(enbit), \ }, \ .qi = BIT(15), \ .modeset_reg = _modeset_reg, \ .modeset_mask = _modeset_mask, \ } #define MT6323_REG_FIXED(match, vreg, enreg, enbit, volt, \ _modeset_reg, _modeset_mask) \ [MT6323_ID_##vreg] = { \ .desc = { \ .name = #vreg, \ .of_match = of_match_ptr(match), \ .ops = &mt6323_volt_fixed_ops, \ .type = REGULATOR_VOLTAGE, \ .id = MT6323_ID_##vreg, \ .owner = THIS_MODULE, \ .n_voltages = 1, \ .enable_reg = enreg, \ .enable_mask = BIT(enbit), \ .min_uV = volt, \ }, \ .qi = BIT(15), \ .modeset_reg = _modeset_reg, \ .modeset_mask = _modeset_mask, \ } static const struct regulator_linear_range buck_volt_range1[] = { REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250), }; static const struct regulator_linear_range buck_volt_range2[] = { REGULATOR_LINEAR_RANGE(1400000, 0, 0x7f, 12500), }; static const struct regulator_linear_range buck_volt_range3[] = { REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000), }; static const u32 ldo_volt_table1[] = { 3300000, 3400000, 3500000, 3600000, }; static const u32 ldo_volt_table2[] = { 1500000, 1800000, 2500000, 2800000, }; static const u32 ldo_volt_table3[] = { 1800000, 3300000, }; static const u32 ldo_volt_table4[] = { 3000000, 3300000, }; static const u32 ldo_volt_table5[] = { 1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000, }; static const u32 ldo_volt_table6[] = { 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000, }; static const u32 ldo_volt_table7[] = { 1200000, 1300000, 1500000, 1800000, }; static const u32 ldo_volt_table8[] = { 1800000, 3000000, }; static const u32 ldo_volt_table9[] = { 1200000, 1350000, 1500000, 1800000, }; static const u32 ldo_volt_table10[] = { 1200000, 1300000, 1500000, 1800000, }; static int mt6323_get_status(struct regulator_dev *rdev) { int ret; u32 regval; struct mt6323_regulator_info *info = rdev_get_drvdata(rdev); ret = regmap_read(rdev->regmap, info->desc.enable_reg, ®val); if (ret != 0) { dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret); return ret; } return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF; } static int mt6323_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) { int ret, val = 0; struct mt6323_regulator_info *info = rdev_get_drvdata(rdev); if (!info->modeset_mask) { dev_err(&rdev->dev, "regulator %s doesn't support set_mode\n", info->desc.name); return -EINVAL; } switch (mode) { case REGULATOR_MODE_STANDBY: val = MT6323_LDO_MODE_LP; break; case REGULATOR_MODE_NORMAL: val = MT6323_LDO_MODE_NORMAL; break; default: return -EINVAL; } val <<= ffs(info->modeset_mask) - 1; ret = regmap_update_bits(rdev->regmap, info->modeset_reg, info->modeset_mask, val); return ret; } static unsigned int mt6323_ldo_get_mode(struct regulator_dev *rdev) { unsigned int val; unsigned int mode; int ret; struct mt6323_regulator_info *info = rdev_get_drvdata(rdev); if (!info->modeset_mask) { dev_err(&rdev->dev, "regulator %s doesn't support get_mode\n", info->desc.name); return -EINVAL; } ret = regmap_read(rdev->regmap, info->modeset_reg, &val); if (ret < 0) return ret; val &= info->modeset_mask; val >>= ffs(info->modeset_mask) - 1; if (val & 0x1) mode = REGULATOR_MODE_STANDBY; else mode = REGULATOR_MODE_NORMAL; return mode; } static const struct regulator_ops mt6323_volt_range_ops = { .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_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, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .get_status = mt6323_get_status, }; static const struct regulator_ops mt6323_volt_table_ops = { .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_iterate, .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, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .get_status = mt6323_get_status, .set_mode = mt6323_ldo_set_mode, .get_mode = mt6323_ldo_get_mode, }; static const struct regulator_ops mt6323_volt_fixed_ops = { .list_voltage = regulator_list_voltage_linear, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .get_status = mt6323_get_status, .set_mode = mt6323_ldo_set_mode, .get_mode = mt6323_ldo_get_mode, }; /* The array is indexed by id(MT6323_ID_XXX) */ static struct mt6323_regulator_info mt6323_regulators[] = { MT6323_BUCK("buck_vproc", VPROC, 700000, 1493750, 6250, buck_volt_range1, MT6323_VPROC_CON7, MT6323_VPROC_CON9, 0x7f, MT6323_VPROC_CON10, MT6323_VPROC_CON5), MT6323_BUCK("buck_vsys", VSYS, 1400000, 2987500, 12500, buck_volt_range2, MT6323_VSYS_CON7, MT6323_VSYS_CON9, 0x7f, MT6323_VSYS_CON10, MT6323_VSYS_CON5), MT6323_BUCK("buck_vpa", VPA, 500000, 3650000, 50000, buck_volt_range3, MT6323_VPA_CON7, MT6323_VPA_CON9, 0x3f, MT6323_VPA_CON10, MT6323_VPA_CON5), MT6323_REG_FIXED("ldo_vtcxo", VTCXO, MT6323_ANALDO_CON1, 10, 2800000, MT6323_ANALDO_CON1, 0x2), MT6323_REG_FIXED("ldo_vcn28", VCN28, MT6323_ANALDO_CON19, 12, 2800000, MT6323_ANALDO_CON20, 0x2), MT6323_LDO("ldo_vcn33_bt", VCN33_BT, ldo_volt_table1, MT6323_ANALDO_CON16, 7, MT6323_ANALDO_CON16, 0xC, MT6323_ANALDO_CON21, 0x2), MT6323_LDO("ldo_vcn33_wifi", VCN33_WIFI, ldo_volt_table1, MT6323_ANALDO_CON17, 12, MT6323_ANALDO_CON16, 0xC, MT6323_ANALDO_CON21, 0x2), MT6323_REG_FIXED("ldo_va", VA, MT6323_ANALDO_CON2, 14, 2800000, MT6323_ANALDO_CON2, 0x2), MT6323_LDO("ldo_vcama", VCAMA, ldo_volt_table2, MT6323_ANALDO_CON4, 15, MT6323_ANALDO_CON10, 0x60, -1, 0), MT6323_REG_FIXED("ldo_vio28", VIO28, MT6323_DIGLDO_CON0, 14, 2800000, MT6323_DIGLDO_CON0, 0x2), MT6323_REG_FIXED("ldo_vusb", VUSB, MT6323_DIGLDO_CON2, 14, 3300000, MT6323_DIGLDO_CON2, 0x2), MT6323_LDO("ldo_vmc", VMC, ldo_volt_table3, MT6323_DIGLDO_CON3, 12, MT6323_DIGLDO_CON24, 0x10, MT6323_DIGLDO_CON3, 0x2), MT6323_LDO("ldo_vmch", VMCH, ldo_volt_table4, MT6323_DIGLDO_CON5, 14, MT6323_DIGLDO_CON26, 0x80, MT6323_DIGLDO_CON5, 0x2), MT6323_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table4, MT6323_DIGLDO_CON6, 14, MT6323_DIGLDO_CON27, 0x80, MT6323_DIGLDO_CON6, 0x2), MT6323_LDO("ldo_vgp1", VGP1, ldo_volt_table5, MT6323_DIGLDO_CON7, 15, MT6323_DIGLDO_CON28, 0xE0, MT6323_DIGLDO_CON7, 0x2), MT6323_LDO("ldo_vgp2", VGP2, ldo_volt_table6, MT6323_DIGLDO_CON8, 15, MT6323_DIGLDO_CON29, 0xE0, MT6323_DIGLDO_CON8, 0x2), MT6323_LDO("ldo_vgp3", VGP3, ldo_volt_table7, MT6323_DIGLDO_CON9, 15, MT6323_DIGLDO_CON30, 0x60, MT6323_DIGLDO_CON9, 0x2), MT6323_REG_FIXED("ldo_vcn18", VCN18, MT6323_DIGLDO_CON11, 14, 1800000, MT6323_DIGLDO_CON11, 0x2), MT6323_LDO("ldo_vsim1", VSIM1, ldo_volt_table8, MT6323_DIGLDO_CON13, 15, MT6323_DIGLDO_CON34, 0x20, MT6323_DIGLDO_CON13, 0x2), MT6323_LDO("ldo_vsim2", VSIM2, ldo_volt_table8, MT6323_DIGLDO_CON14, 15, MT6323_DIGLDO_CON35, 0x20, MT6323_DIGLDO_CON14, 0x2), MT6323_REG_FIXED("ldo_vrtc", VRTC, MT6323_DIGLDO_CON15, 8, 2800000, -1, 0), MT6323_LDO("ldo_vcamaf", VCAMAF, ldo_volt_table5, MT6323_DIGLDO_CON31, 15, MT6323_DIGLDO_CON32, 0xE0, MT6323_DIGLDO_CON31, 0x2), MT6323_LDO("ldo_vibr", VIBR, ldo_volt_table5, MT6323_DIGLDO_CON39, 15, MT6323_DIGLDO_CON40, 0xE0, MT6323_DIGLDO_CON39, 0x2), MT6323_REG_FIXED("ldo_vrf18", VRF18, MT6323_DIGLDO_CON45, 15, 1825000, MT6323_DIGLDO_CON45, 0x2), MT6323_LDO("ldo_vm", VM, ldo_volt_table9, MT6323_DIGLDO_CON47, 14, MT6323_DIGLDO_CON48, 0x30, MT6323_DIGLDO_CON47, 0x2), MT6323_REG_FIXED("ldo_vio18", VIO18, MT6323_DIGLDO_CON49, 14, 1800000, MT6323_DIGLDO_CON49, 0x2), MT6323_LDO("ldo_vcamd", VCAMD, ldo_volt_table10, MT6323_DIGLDO_CON51, 14, MT6323_DIGLDO_CON52, 0x60, MT6323_DIGLDO_CON51, 0x2), MT6323_REG_FIXED("ldo_vcamio", VCAMIO, MT6323_DIGLDO_CON53, 14, 1800000, MT6323_DIGLDO_CON53, 0x2), }; static int mt6323_set_buck_vosel_reg(struct platform_device *pdev) { struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent); int i; u32 regval; for (i = 0; i < MT6323_MAX_REGULATOR; i++) { if (mt6323_regulators[i].vselctrl_reg) { if (regmap_read(mt6323->regmap, mt6323_regulators[i].vselctrl_reg, ®val) < 0) { dev_err(&pdev->dev, "Failed to read buck ctrl\n"); return -EIO; } if (regval & mt6323_regulators[i].vselctrl_mask) { mt6323_regulators[i].desc.vsel_reg = mt6323_regulators[i].vselon_reg; } } } return 0; } static int mt6323_regulator_probe(struct platform_device *pdev) { struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent); struct regulator_config config = {}; struct regulator_dev *rdev; int i; u32 reg_value; /* Query buck controller to select activated voltage register part */ if (mt6323_set_buck_vosel_reg(pdev)) return -EIO; /* Read PMIC chip revision to update constraints and voltage table */ if (regmap_read(mt6323->regmap, MT6323_CID, ®_value) < 0) { dev_err(&pdev->dev, "Failed to read Chip ID\n"); return -EIO; } dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value); for (i = 0; i < MT6323_MAX_REGULATOR; i++) { config.dev = &pdev->dev; config.driver_data = &mt6323_regulators[i]; config.regmap = mt6323->regmap; rdev = devm_regulator_register(&pdev->dev, &mt6323_regulators[i].desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s\n", mt6323_regulators[i].desc.name); return PTR_ERR(rdev); } } return 0; } static const struct platform_device_id mt6323_platform_ids[] = { {"mt6323-regulator", 0}, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(platform, mt6323_platform_ids); static struct platform_driver mt6323_regulator_driver = { .driver = { .name = "mt6323-regulator", }, .probe = mt6323_regulator_probe, .id_table = mt6323_platform_ids, }; module_platform_driver(mt6323_regulator_driver); MODULE_AUTHOR("Chen Zhong "); MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6323 PMIC"); MODULE_LICENSE("GPL v2");