/* * AXP20x regulators driver. * * Copyright (C) 2013 Carlo Caione * * This file is subject to the terms and conditions of the GNU General * Public License. See the file "COPYING" in the main directory of this * archive for more details. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #define AXP20X_IO_ENABLED 0x03 #define AXP20X_IO_DISABLED 0x07 #define AXP22X_IO_ENABLED 0x03 #define AXP22X_IO_DISABLED 0x04 #define AXP20X_WORKMODE_DCDC2_MASK BIT(2) #define AXP20X_WORKMODE_DCDC3_MASK BIT(1) #define AXP22X_WORKMODE_DCDCX_MASK(x) BIT(x) #define AXP20X_FREQ_DCDC_MASK 0x0f #define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg, \ _vmask, _ereg, _emask, _enable_val, _disable_val) \ [_family##_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = _family##_##_id, \ .n_voltages = (((_max) - (_min)) / (_step) + 1), \ .owner = THIS_MODULE, \ .min_uV = (_min) * 1000, \ .uV_step = (_step) * 1000, \ .vsel_reg = (_vreg), \ .vsel_mask = (_vmask), \ .enable_reg = (_ereg), \ .enable_mask = (_emask), \ .enable_val = (_enable_val), \ .disable_val = (_disable_val), \ .ops = &axp20x_ops, \ } #define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg, \ _vmask, _ereg, _emask) \ [_family##_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = _family##_##_id, \ .n_voltages = (((_max) - (_min)) / (_step) + 1), \ .owner = THIS_MODULE, \ .min_uV = (_min) * 1000, \ .uV_step = (_step) * 1000, \ .vsel_reg = (_vreg), \ .vsel_mask = (_vmask), \ .enable_reg = (_ereg), \ .enable_mask = (_emask), \ .ops = &axp20x_ops, \ } #define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask) \ [_family##_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = _family##_##_id, \ .owner = THIS_MODULE, \ .enable_reg = (_ereg), \ .enable_mask = (_emask), \ .ops = &axp20x_ops_sw, \ } #define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt) \ [_family##_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = _family##_##_id, \ .n_voltages = 1, \ .owner = THIS_MODULE, \ .min_uV = (_volt) * 1000, \ .ops = &axp20x_ops_fixed \ } #define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages, \ _vreg, _vmask, _ereg, _emask) \ [_family##_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = _family##_##_id, \ .n_voltages = (_n_voltages), \ .owner = THIS_MODULE, \ .vsel_reg = (_vreg), \ .vsel_mask = (_vmask), \ .enable_reg = (_ereg), \ .enable_mask = (_emask), \ .linear_ranges = (_ranges), \ .n_linear_ranges = ARRAY_SIZE(_ranges), \ .ops = &axp20x_ops_range, \ } static struct regulator_ops axp20x_ops_fixed = { .list_voltage = regulator_list_voltage_linear, }; static struct regulator_ops axp20x_ops_range = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear_range, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; static struct regulator_ops axp20x_ops = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; static struct regulator_ops axp20x_ops_sw = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; static const struct regulator_linear_range axp20x_ldo4_ranges[] = { REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0), REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000), REGULATOR_LINEAR_RANGE(2500000, 0x9, 0xf, 100000), }; static const struct regulator_desc axp20x_regulators[] = { AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10), AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02), AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300), AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100, AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04), AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40), AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges, 16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08), AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100, AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07, AXP20X_IO_ENABLED, AXP20X_IO_DISABLED), }; static const struct regulator_desc axp22x_regulators[] = { AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100, AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)), AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20, AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)), AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20, AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)), AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20, AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)), AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50, AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)), /* secondary switchable output of DCDC1 */ AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2, BIT(7)), /* LDO regulator internally chained to DCDC5 */ AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100, AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)), AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100, AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)), AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100, AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)), AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100, AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)), AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100, AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)), AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100, AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)), AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100, AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)), AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100, AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)), AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100, AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)), AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100, AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)), AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100, AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)), AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 1800, 3300, 100, AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07, AXP22X_IO_ENABLED, AXP22X_IO_DISABLED), AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 1800, 3300, 100, AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07, AXP22X_IO_ENABLED, AXP22X_IO_DISABLED), AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000), }; static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) { struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); u32 min, max, def, step; switch (axp20x->variant) { case AXP202_ID: case AXP209_ID: min = 750; max = 1875; def = 1500; step = 75; break; case AXP221_ID: min = 1800; max = 4050; def = 3000; step = 150; break; default: dev_err(&pdev->dev, "Setting DCDC frequency for unsupported AXP variant\n"); return -EINVAL; } if (dcdcfreq == 0) dcdcfreq = def; if (dcdcfreq < min) { dcdcfreq = min; dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n", min); } if (dcdcfreq > max) { dcdcfreq = max; dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n", max); } dcdcfreq = (dcdcfreq - min) / step; return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ, AXP20X_FREQ_DCDC_MASK, dcdcfreq); } static int axp20x_regulator_parse_dt(struct platform_device *pdev) { struct device_node *np, *regulators; int ret; u32 dcdcfreq = 0; np = of_node_get(pdev->dev.parent->of_node); if (!np) return 0; regulators = of_get_child_by_name(np, "regulators"); if (!regulators) { dev_warn(&pdev->dev, "regulators node not found\n"); } else { of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq); ret = axp20x_set_dcdc_freq(pdev, dcdcfreq); if (ret < 0) { dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret); return ret; } of_node_put(regulators); } return 0; } static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode) { struct axp20x_dev *axp20x = rdev_get_drvdata(rdev); unsigned int mask; switch (axp20x->variant) { case AXP202_ID: case AXP209_ID: if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3)) return -EINVAL; mask = AXP20X_WORKMODE_DCDC2_MASK; if (id == AXP20X_DCDC3) mask = AXP20X_WORKMODE_DCDC3_MASK; workmode <<= ffs(mask) - 1; break; case AXP221_ID: if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5) return -EINVAL; mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1); workmode <<= id - AXP22X_DCDC1; break; default: /* should not happen */ WARN_ON(1); return -EINVAL; } return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode); } static int axp20x_regulator_probe(struct platform_device *pdev) { struct regulator_dev *rdev; struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); const struct regulator_desc *regulators; struct regulator_config config = { .dev = pdev->dev.parent, .regmap = axp20x->regmap, .driver_data = axp20x, }; int ret, i, nregulators; u32 workmode; const char *axp22x_dc1_name = axp22x_regulators[AXP22X_DCDC1].name; const char *axp22x_dc5_name = axp22x_regulators[AXP22X_DCDC5].name; switch (axp20x->variant) { case AXP202_ID: case AXP209_ID: regulators = axp20x_regulators; nregulators = AXP20X_REG_ID_MAX; break; case AXP221_ID: regulators = axp22x_regulators; nregulators = AXP22X_REG_ID_MAX; break; default: dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n", axp20x->variant); return -EINVAL; } /* This only sets the dcdc freq. Ignore any errors */ axp20x_regulator_parse_dt(pdev); for (i = 0; i < nregulators; i++) { const struct regulator_desc *desc = ®ulators[i]; struct regulator_desc *new_desc; /* * Regulators DC1SW and DC5LDO are connected internally, * so we have to handle their supply names separately. * * We always register the regulators in proper sequence, * so the supply names are correctly read. See the last * part of this loop to see where we save the DT defined * name. */ if (regulators == axp22x_regulators) { if (i == AXP22X_DC1SW) { new_desc = devm_kzalloc(&pdev->dev, sizeof(*desc), GFP_KERNEL); *new_desc = regulators[i]; new_desc->supply_name = axp22x_dc1_name; desc = new_desc; } else if (i == AXP22X_DC5LDO) { new_desc = devm_kzalloc(&pdev->dev, sizeof(*desc), GFP_KERNEL); *new_desc = regulators[i]; new_desc->supply_name = axp22x_dc5_name; desc = new_desc; } } rdev = devm_regulator_register(&pdev->dev, desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "Failed to register %s\n", regulators[i].name); return PTR_ERR(rdev); } ret = of_property_read_u32(rdev->dev.of_node, "x-powers,dcdc-workmode", &workmode); if (!ret) { if (axp20x_set_dcdc_workmode(rdev, i, workmode)) dev_err(&pdev->dev, "Failed to set workmode on %s\n", rdev->desc->name); } /* * Save AXP22X DCDC1 / DCDC5 regulator names for later. */ if (regulators == axp22x_regulators) { /* Can we use rdev->constraints->name instead? */ if (i == AXP22X_DCDC1) of_property_read_string(rdev->dev.of_node, "regulator-name", &axp22x_dc1_name); else if (i == AXP22X_DCDC5) of_property_read_string(rdev->dev.of_node, "regulator-name", &axp22x_dc5_name); } } return 0; } static struct platform_driver axp20x_regulator_driver = { .probe = axp20x_regulator_probe, .driver = { .name = "axp20x-regulator", }, }; module_platform_driver(axp20x_regulator_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Carlo Caione "); MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC"); MODULE_ALIAS("platform:axp20x-regulator");