/* * AXP20x regulators driver. * * Copyright (C) 2013 Carlo Caione <carlo@caione.org> * * 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 <linux/err.h> #include <linux/init.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/mfd/axp20x.h> #include <linux/regulator/driver.h> #include <linux/regulator/of_regulator.h> #define AXP20X_IO_ENABLED 0x03 #define AXP20X_IO_DISABLED 0x07 #define AXP20X_WORKMODE_DCDC2_MASK BIT(2) #define AXP20X_WORKMODE_DCDC3_MASK BIT(1) #define AXP20X_FREQ_DCDC_MASK 0x0f #define AXP20X_DESC_IO(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \ _ereg, _emask, _enable_val, _disable_val) \ [AXP20X_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = AXP20X_##_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 AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \ _ereg, _emask) \ [AXP20X_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = AXP20X_##_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 AXP20X_DESC_FIXED(_id, _match, _supply, _volt) \ [AXP20X_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = AXP20X_##_id, \ .n_voltages = 1, \ .owner = THIS_MODULE, \ .min_uV = (_volt) * 1000, \ .ops = &axp20x_ops_fixed \ } #define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg, \ _emask) \ [AXP20X_##_id] = { \ .name = #_id, \ .supply_name = (_supply), \ .of_match = of_match_ptr(_match), \ .regulators_node = of_match_ptr("regulators"), \ .type = REGULATOR_VOLTAGE, \ .id = AXP20X_##_id, \ .n_voltages = ARRAY_SIZE(_table), \ .owner = THIS_MODULE, \ .vsel_reg = (_vreg), \ .vsel_mask = (_vmask), \ .enable_reg = (_ereg), \ .enable_mask = (_emask), \ .volt_table = (_table), \ .ops = &axp20x_ops_table, \ } static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2500000, 2700000, 2800000, 3000000, 3100000, 3200000, 3300000 }; static struct regulator_ops axp20x_ops_fixed = { .list_voltage = regulator_list_voltage_linear, }; static struct regulator_ops axp20x_ops_table = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, .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 const struct regulator_desc axp20x_regulators[] = { AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10), AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02), AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300), AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100, AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04), AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40), AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08), AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100, AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07, AXP20X_IO_ENABLED, AXP20X_IO_DISABLED), }; static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) { struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); if (dcdcfreq < 750) { dcdcfreq = 750; dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n"); } if (dcdcfreq > 1875) { dcdcfreq = 1875; dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n"); } dcdcfreq = (dcdcfreq - 750) / 75; 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; 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 { dcdcfreq = 1500; 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) { unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK; if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3)) return -EINVAL; if (id == AXP20X_DCDC3) mask = AXP20X_WORKMODE_DCDC3_MASK; workmode <<= ffs(mask) - 1; 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); struct regulator_config config = { .dev = pdev->dev.parent, .regmap = axp20x->regmap, }; int ret, i; u32 workmode; /* This only sets the dcdc freq. Ignore any errors */ axp20x_regulator_parse_dt(pdev); for (i = 0; i < AXP20X_REG_ID_MAX; i++) { rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i], &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "Failed to register %s\n", axp20x_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", axp20x_regulators[i].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 <carlo@caione.org>"); MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");