| /* |
| * Regulator driver for DA9055 PMIC |
| * |
| * Copyright(c) 2012 Dialog Semiconductor Ltd. |
| * |
| * Author: David Dajun Chen <dchen@diasemi.com> |
| * |
| * 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 <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/gpio.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/of.h> |
| #include <linux/regulator/of_regulator.h> |
| |
| #include <linux/mfd/da9055/core.h> |
| #include <linux/mfd/da9055/reg.h> |
| #include <linux/mfd/da9055/pdata.h> |
| |
| #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 unsigned 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_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 = regulator_get_current_limit_regmap, |
| .set_current_limit = regulator_set_current_limit_regmap, |
| |
| .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,\ |
| .curr_table = da9055_current_limits,\ |
| .n_current_limits = ARRAY_SIZE(da9055_current_limits),\ |
| .csel_reg = DA9055_REG_BUCK_LIM,\ |
| .csel_mask = (mbits),\ |
| },\ |
| .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_gpiod = pdata->ena_gpiods[id]; |
| |
| /* |
| * 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 <dchen@diasemi.com>"); |
| MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:da9055-regulator"); |