/* * Regulator driver for DA9055 PMIC * * Copyright(c) 2012 Dialog Semiconductor Ltd. * * Author: David Dajun Chen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * */ #include #include #include #include #include #include #include #include #include #include #include #include #define DA9055_MIN_UA 0 #define DA9055_MAX_UA 3 #define DA9055_LDO_MODE_SYNC 0 #define DA9055_LDO_MODE_SLEEP 1 #define DA9055_BUCK_MODE_SLEEP 1 #define DA9055_BUCK_MODE_SYNC 2 #define DA9055_BUCK_MODE_AUTO 3 /* DA9055 REGULATOR IDs */ #define DA9055_ID_BUCK1 0 #define DA9055_ID_BUCK2 1 #define DA9055_ID_LDO1 2 #define DA9055_ID_LDO2 3 #define DA9055_ID_LDO3 4 #define DA9055_ID_LDO4 5 #define DA9055_ID_LDO5 6 #define DA9055_ID_LDO6 7 /* DA9055 BUCK current limit */ static const int da9055_current_limits[] = { 500000, 600000, 700000, 800000 }; struct da9055_conf_reg { int reg; int sel_mask; int en_mask; }; struct da9055_volt_reg { int reg_a; int reg_b; int sl_shift; int v_mask; }; struct da9055_mode_reg { int reg; int mask; int shift; }; struct da9055_regulator_info { struct regulator_desc reg_desc; struct da9055_conf_reg conf; struct da9055_volt_reg volt; struct da9055_mode_reg mode; }; struct da9055_regulator { struct da9055 *da9055; struct da9055_regulator_info *info; struct regulator_dev *rdev; enum gpio_select reg_rselect; }; static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int ret, mode = 0; ret = da9055_reg_read(regulator->da9055, info->mode.reg); if (ret < 0) return ret; switch ((ret & info->mode.mask) >> info->mode.shift) { case DA9055_BUCK_MODE_SYNC: mode = REGULATOR_MODE_FAST; break; case DA9055_BUCK_MODE_AUTO: mode = REGULATOR_MODE_NORMAL; break; case DA9055_BUCK_MODE_SLEEP: mode = REGULATOR_MODE_STANDBY; break; } return mode; } static int da9055_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int val = 0; switch (mode) { case REGULATOR_MODE_FAST: val = DA9055_BUCK_MODE_SYNC << info->mode.shift; break; case REGULATOR_MODE_NORMAL: val = DA9055_BUCK_MODE_AUTO << info->mode.shift; break; case REGULATOR_MODE_STANDBY: val = DA9055_BUCK_MODE_SLEEP << info->mode.shift; break; } return da9055_reg_update(regulator->da9055, info->mode.reg, info->mode.mask, val); } static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int ret; ret = da9055_reg_read(regulator->da9055, info->volt.reg_b); if (ret < 0) return ret; if (ret >> info->volt.sl_shift) return REGULATOR_MODE_STANDBY; else return REGULATOR_MODE_NORMAL; } static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; struct da9055_volt_reg volt = info->volt; int val = 0; switch (mode) { case REGULATOR_MODE_NORMAL: case REGULATOR_MODE_FAST: val = DA9055_LDO_MODE_SYNC; break; case REGULATOR_MODE_STANDBY: val = DA9055_LDO_MODE_SLEEP; break; } return da9055_reg_update(regulator->da9055, volt.reg_b, 1 << volt.sl_shift, val << volt.sl_shift); } static int da9055_buck_get_current_limit(struct regulator_dev *rdev) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int ret; ret = da9055_reg_read(regulator->da9055, DA9055_REG_BUCK_LIM); if (ret < 0) return ret; ret &= info->mode.mask; return da9055_current_limits[ret >> info->mode.shift]; } static int da9055_buck_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int i; for (i = ARRAY_SIZE(da9055_current_limits) - 1; i >= 0; i--) { if ((min_uA <= da9055_current_limits[i]) && (da9055_current_limits[i] <= max_uA)) return da9055_reg_update(regulator->da9055, DA9055_REG_BUCK_LIM, info->mode.mask, i << info->mode.shift); } return -EINVAL; } static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; struct da9055_volt_reg volt = info->volt; int ret, sel; /* * There are two voltage register set A & B for voltage ramping but * either one of then can be active therefore we first determine * the active register set. */ ret = da9055_reg_read(regulator->da9055, info->conf.reg); if (ret < 0) return ret; ret &= info->conf.sel_mask; /* Get the voltage for the active register set A/B */ if (ret == DA9055_REGUALTOR_SET_A) ret = da9055_reg_read(regulator->da9055, volt.reg_a); else ret = da9055_reg_read(regulator->da9055, volt.reg_b); if (ret < 0) return ret; sel = (ret & volt.v_mask); return sel; } static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int ret; /* * Regulator register set A/B is not selected through GPIO therefore * we use default register set A for voltage ramping. */ if (regulator->reg_rselect == NO_GPIO) { /* Select register set A */ ret = da9055_reg_update(regulator->da9055, info->conf.reg, info->conf.sel_mask, DA9055_SEL_REG_A); if (ret < 0) return ret; /* Set the voltage */ return da9055_reg_update(regulator->da9055, info->volt.reg_a, info->volt.v_mask, selector); } /* * Here regulator register set A/B is selected through GPIO. * Therefore we first determine the selected register set A/B and * then set the desired voltage for that register set A/B. */ ret = da9055_reg_read(regulator->da9055, info->conf.reg); if (ret < 0) return ret; ret &= info->conf.sel_mask; /* Set the voltage */ if (ret == DA9055_REGUALTOR_SET_A) return da9055_reg_update(regulator->da9055, info->volt.reg_a, info->volt.v_mask, selector); else return da9055_reg_update(regulator->da9055, info->volt.reg_b, info->volt.v_mask, selector); } static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev, int uV) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; int ret; /* Select register set B for suspend voltage ramping. */ if (regulator->reg_rselect == NO_GPIO) { ret = da9055_reg_update(regulator->da9055, info->conf.reg, info->conf.sel_mask, DA9055_SEL_REG_B); if (ret < 0) return ret; } ret = regulator_map_voltage_linear(rdev, uV, uV); if (ret < 0) return ret; return da9055_reg_update(regulator->da9055, info->volt.reg_b, info->volt.v_mask, ret); } static int da9055_suspend_enable(struct regulator_dev *rdev) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; /* Select register set B for voltage ramping. */ if (regulator->reg_rselect == NO_GPIO) return da9055_reg_update(regulator->da9055, info->conf.reg, info->conf.sel_mask, DA9055_SEL_REG_B); else return 0; } static int da9055_suspend_disable(struct regulator_dev *rdev) { struct da9055_regulator *regulator = rdev_get_drvdata(rdev); struct da9055_regulator_info *info = regulator->info; /* Diselect register set B. */ if (regulator->reg_rselect == NO_GPIO) return da9055_reg_update(regulator->da9055, info->conf.reg, info->conf.sel_mask, DA9055_SEL_REG_A); else return 0; } static const struct regulator_ops da9055_buck_ops = { .get_mode = da9055_buck_get_mode, .set_mode = da9055_buck_set_mode, .get_current_limit = da9055_buck_get_current_limit, .set_current_limit = da9055_buck_set_current_limit, .get_voltage_sel = da9055_regulator_get_voltage_sel, .set_voltage_sel = da9055_regulator_set_voltage_sel, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_voltage = da9055_regulator_set_suspend_voltage, .set_suspend_enable = da9055_suspend_enable, .set_suspend_disable = da9055_suspend_disable, .set_suspend_mode = da9055_buck_set_mode, }; static const struct regulator_ops da9055_ldo_ops = { .get_mode = da9055_ldo_get_mode, .set_mode = da9055_ldo_set_mode, .get_voltage_sel = da9055_regulator_get_voltage_sel, .set_voltage_sel = da9055_regulator_set_voltage_sel, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .set_suspend_voltage = da9055_regulator_set_suspend_voltage, .set_suspend_enable = da9055_suspend_enable, .set_suspend_disable = da9055_suspend_disable, .set_suspend_mode = da9055_ldo_set_mode, }; #define DA9055_LDO(_id, step, min, max, vbits, voffset) \ {\ .reg_desc = {\ .name = #_id,\ .ops = &da9055_ldo_ops,\ .type = REGULATOR_VOLTAGE,\ .id = DA9055_ID_##_id,\ .n_voltages = (max - min) / step + 1 + (voffset), \ .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ .enable_mask = 1, \ .min_uV = (min) * 1000,\ .uV_step = (step) * 1000,\ .linear_min_sel = (voffset),\ .owner = THIS_MODULE,\ },\ .conf = {\ .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ .sel_mask = (1 << 4),\ .en_mask = 1,\ },\ .volt = {\ .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ .sl_shift = 7,\ .v_mask = (1 << (vbits)) - 1,\ },\ } #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \ {\ .reg_desc = {\ .name = #_id,\ .ops = &da9055_buck_ops,\ .type = REGULATOR_VOLTAGE,\ .id = DA9055_ID_##_id,\ .n_voltages = (max - min) / step + 1 + (voffset), \ .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ .enable_mask = 1,\ .min_uV = (min) * 1000,\ .uV_step = (step) * 1000,\ .linear_min_sel = (voffset),\ .owner = THIS_MODULE,\ },\ .conf = {\ .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \ .sel_mask = (1 << 4),\ .en_mask = 1,\ },\ .volt = {\ .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \ .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \ .sl_shift = 7,\ .v_mask = (1 << (vbits)) - 1,\ },\ .mode = {\ .reg = DA9055_REG_BCORE_MODE,\ .mask = (mbits),\ .shift = (sbits),\ },\ } static struct da9055_regulator_info da9055_regulator_info[] = { DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2), DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0), DA9055_LDO(LDO1, 50, 900, 3300, 6, 2), DA9055_LDO(LDO2, 50, 900, 3300, 6, 3), DA9055_LDO(LDO3, 50, 900, 3300, 6, 2), DA9055_LDO(LDO4, 50, 900, 3300, 6, 2), DA9055_LDO(LDO5, 50, 900, 2750, 6, 2), DA9055_LDO(LDO6, 20, 900, 3300, 7, 0), }; /* * Configures regulator to be controlled either through GPIO 1 or 2. * GPIO can control regulator state and/or select the regulator register * set A/B for voltage ramping. */ static int da9055_gpio_init(struct da9055_regulator *regulator, struct regulator_config *config, struct da9055_pdata *pdata, int id) { struct da9055_regulator_info *info = regulator->info; int ret = 0; if (!pdata) return 0; if (pdata->gpio_ren && pdata->gpio_ren[id]) { char name[18]; int gpio_mux = pdata->gpio_ren[id]; config->ena_gpio = pdata->ena_gpio[id]; config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH; config->ena_gpio_invert = 1; /* * GPI pin is muxed with regulator to control the * regulator state. */ sprintf(name, "DA9055 GPI %d", gpio_mux); ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, name); if (ret < 0) goto err; /* * Let the regulator know that its state is controlled * through GPI. */ ret = da9055_reg_update(regulator->da9055, info->conf.reg, DA9055_E_GPI_MASK, pdata->reg_ren[id] << DA9055_E_GPI_SHIFT); if (ret < 0) goto err; } if (pdata->gpio_rsel && pdata->gpio_rsel[id]) { char name[18]; int gpio_mux = pdata->gpio_rsel[id]; regulator->reg_rselect = pdata->reg_rsel[id]; /* * GPI pin is muxed with regulator to select the * regulator register set A/B for voltage ramping. */ sprintf(name, "DA9055 GPI %d", gpio_mux); ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN, name); if (ret < 0) goto err; /* * Let the regulator know that its register set A/B * will be selected through GPI for voltage ramping. */ ret = da9055_reg_update(regulator->da9055, info->conf.reg, DA9055_V_GPI_MASK, pdata->reg_rsel[id] << DA9055_V_GPI_SHIFT); } err: return ret; } static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data) { struct da9055_regulator *regulator = data; regulator_notifier_call_chain(regulator->rdev, REGULATOR_EVENT_OVER_CURRENT, NULL); return IRQ_HANDLED; } static inline struct da9055_regulator_info *find_regulator_info(int id) { struct da9055_regulator_info *info; int i; for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) { info = &da9055_regulator_info[i]; if (info->reg_desc.id == id) return info; } return NULL; } #ifdef CONFIG_OF static struct of_regulator_match da9055_reg_matches[] = { { .name = "BUCK1", }, { .name = "BUCK2", }, { .name = "LDO1", }, { .name = "LDO2", }, { .name = "LDO3", }, { .name = "LDO4", }, { .name = "LDO5", }, { .name = "LDO6", }, }; static int da9055_regulator_dt_init(struct platform_device *pdev, struct da9055_regulator *regulator, struct regulator_config *config, int regid) { struct device_node *nproot, *np; int ret; nproot = of_node_get(pdev->dev.parent->of_node); if (!nproot) return -ENODEV; np = of_get_child_by_name(nproot, "regulators"); if (!np) return -ENODEV; ret = of_regulator_match(&pdev->dev, np, &da9055_reg_matches[regid], 1); of_node_put(nproot); if (ret < 0) { dev_err(&pdev->dev, "Error matching regulator: %d\n", ret); return ret; } config->init_data = da9055_reg_matches[regid].init_data; config->of_node = da9055_reg_matches[regid].of_node; if (!config->of_node) return -ENODEV; return 0; } #else static inline int da9055_regulator_dt_init(struct platform_device *pdev, struct da9055_regulator *regulator, struct regulator_config *config, int regid) { return -ENODEV; } #endif /* CONFIG_OF */ static int da9055_regulator_probe(struct platform_device *pdev) { struct regulator_config config = { }; struct da9055_regulator *regulator; struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent); struct da9055_pdata *pdata = dev_get_platdata(da9055->dev); int ret, irq; regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator), GFP_KERNEL); if (!regulator) return -ENOMEM; regulator->info = find_regulator_info(pdev->id); if (regulator->info == NULL) { dev_err(&pdev->dev, "invalid regulator ID specified\n"); return -EINVAL; } regulator->da9055 = da9055; config.dev = &pdev->dev; config.driver_data = regulator; config.regmap = da9055->regmap; if (pdata) { config.init_data = pdata->regulators[pdev->id]; } else { ret = da9055_regulator_dt_init(pdev, regulator, &config, pdev->id); if (ret < 0) return ret; } ret = da9055_gpio_init(regulator, &config, pdata, pdev->id); if (ret < 0) return ret; regulator->rdev = devm_regulator_register(&pdev->dev, ®ulator->info->reg_desc, &config); if (IS_ERR(regulator->rdev)) { dev_err(&pdev->dev, "Failed to register regulator %s\n", regulator->info->reg_desc.name); return PTR_ERR(regulator->rdev); } /* Only LDO 5 and 6 has got the over current interrupt */ if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) { irq = platform_get_irq_byname(pdev, "REGULATOR"); if (irq < 0) return irq; ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, da9055_ldo5_6_oc_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT | IRQF_PROBE_SHARED, pdev->name, regulator); if (ret != 0) { if (ret != -EBUSY) { dev_err(&pdev->dev, "Failed to request Regulator IRQ %d: %d\n", irq, ret); return ret; } } } platform_set_drvdata(pdev, regulator); return 0; } static struct platform_driver da9055_regulator_driver = { .probe = da9055_regulator_probe, .driver = { .name = "da9055-regulator", }, }; static int __init da9055_regulator_init(void) { return platform_driver_register(&da9055_regulator_driver); } subsys_initcall(da9055_regulator_init); static void __exit da9055_regulator_exit(void) { platform_driver_unregister(&da9055_regulator_driver); } module_exit(da9055_regulator_exit); MODULE_AUTHOR("David Dajun Chen "); MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:da9055-regulator");