/* * da9052-regulator.c: Regulator driver for DA9052 * * Copyright(c) 2011 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/moduleparam.h> #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #ifdef CONFIG_OF #include <linux/of.h> #include <linux/regulator/of_regulator.h> #endif #include <linux/mfd/da9052/da9052.h> #include <linux/mfd/da9052/reg.h> #include <linux/mfd/da9052/pdata.h> /* Buck step size */ #define DA9052_BUCK_PERI_3uV_STEP 100000 #define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24 #define DA9052_CONST_3uV 3000000 #define DA9052_MIN_UA 0 #define DA9052_MAX_UA 3 #define DA9052_CURRENT_RANGE 4 /* Bit masks */ #define DA9052_BUCK_ILIM_MASK_EVEN 0x0c #define DA9052_BUCK_ILIM_MASK_ODD 0xc0 /* DA9052 REGULATOR IDs */ #define DA9052_ID_BUCK1 0 #define DA9052_ID_BUCK2 1 #define DA9052_ID_BUCK3 2 #define DA9052_ID_BUCK4 3 #define DA9052_ID_LDO1 4 #define DA9052_ID_LDO2 5 #define DA9052_ID_LDO3 6 #define DA9052_ID_LDO4 7 #define DA9052_ID_LDO5 8 #define DA9052_ID_LDO6 9 #define DA9052_ID_LDO7 10 #define DA9052_ID_LDO8 11 #define DA9052_ID_LDO9 12 #define DA9052_ID_LDO10 13 static const u32 da9052_current_limits[3][4] = { {700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */ {1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */ {800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO, * BUCK-MEM and BUCK-PERI */ }; struct da9052_regulator_info { struct regulator_desc reg_desc; int step_uV; int min_uV; int max_uV; unsigned char activate_bit; }; struct da9052_regulator { struct da9052 *da9052; struct da9052_regulator_info *info; struct regulator_dev *rdev; }; static int verify_range(struct da9052_regulator_info *info, int min_uV, int max_uV) { if (min_uV > info->max_uV || max_uV < info->min_uV) return -EINVAL; return 0; } static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); int offset = rdev_get_id(rdev); int ret, row = 2; ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2); if (ret < 0) return ret; /* Determine the even or odd position of the buck current limit * register field */ if (offset % 2 == 0) ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2; else ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6; /* Select the appropriate current limit range */ if (regulator->da9052->chip_id == DA9052) row = 0; else if (offset == 0) row = 1; return da9052_current_limits[row][ret]; } static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); int offset = rdev_get_id(rdev); int reg_val = 0; int i, row = 2; /* Select the appropriate current limit range */ if (regulator->da9052->chip_id == DA9052) row = 0; else if (offset == 0) row = 1; for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) { if ((min_uA <= da9052_current_limits[row][i]) && (da9052_current_limits[row][i] <= max_uA)) { reg_val = i; break; } } if (i < 0) return -EINVAL; /* Determine the even or odd position of the buck current limit * register field */ if (offset % 2 == 0) return da9052_reg_update(regulator->da9052, DA9052_BUCKA_REG + offset/2, DA9052_BUCK_ILIM_MASK_EVEN, reg_val << 2); else return da9052_reg_update(regulator->da9052, DA9052_BUCKA_REG + offset/2, DA9052_BUCK_ILIM_MASK_ODD, reg_val << 6); } static int da9052_list_voltage(struct regulator_dev *rdev, unsigned int selector) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int id = rdev_get_id(rdev); int volt_uV; if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052) && (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) { volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV) + info->min_uV); volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV) * (DA9052_BUCK_PERI_3uV_STEP); } else { volt_uV = (selector * info->step_uV) + info->min_uV; } if (volt_uV > info->max_uV) return -EINVAL; return volt_uV; } static int da9052_map_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int id = rdev_get_id(rdev); int ret, sel; ret = verify_range(info, min_uV, max_uV); if (ret < 0) return ret; if (min_uV < info->min_uV) min_uV = info->min_uV; if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052) && (min_uV >= DA9052_CONST_3uV)) { sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV + DIV_ROUND_UP(min_uV - DA9052_CONST_3uV, DA9052_BUCK_PERI_3uV_STEP); } else { sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV); } ret = da9052_list_voltage(rdev, sel); if (ret < 0) return ret; return sel; } static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int id = rdev_get_id(rdev); int ret; ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg, rdev->desc->vsel_mask, selector); if (ret < 0) return ret; /* Some LDOs and DCDCs are DVC controlled which requires enabling of * the activate bit to implment the changes on the output. */ switch (id) { case DA9052_ID_BUCK1: case DA9052_ID_BUCK2: case DA9052_ID_BUCK3: case DA9052_ID_LDO2: case DA9052_ID_LDO3: ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG, info->activate_bit, info->activate_bit); break; } return ret; } static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev, unsigned int old_sel, unsigned int new_sel) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int id = rdev_get_id(rdev); int ret = 0; /* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling * the activate bit. */ switch (id) { case DA9052_ID_BUCK1: case DA9052_ID_BUCK2: case DA9052_ID_BUCK3: case DA9052_ID_LDO2: case DA9052_ID_LDO3: ret = (new_sel - old_sel) * info->step_uV / 6250; break; } return ret; } static const struct regulator_ops da9052_dcdc_ops = { .get_current_limit = da9052_dcdc_get_current_limit, .set_current_limit = da9052_dcdc_set_current_limit, .list_voltage = da9052_list_voltage, .map_voltage = da9052_map_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = da9052_regulator_set_voltage_sel, .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, }; static const struct regulator_ops da9052_ldo_ops = { .list_voltage = da9052_list_voltage, .map_voltage = da9052_map_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = da9052_regulator_set_voltage_sel, .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, }; #define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \ {\ .reg_desc = {\ .name = #_id,\ .ops = &da9052_ldo_ops,\ .type = REGULATOR_VOLTAGE,\ .id = DA9052_ID_##_id,\ .n_voltages = (max - min) / step + 1, \ .owner = THIS_MODULE,\ .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ .vsel_mask = (1 << (sbits)) - 1,\ .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ .enable_mask = 1 << (ebits),\ },\ .min_uV = (min) * 1000,\ .max_uV = (max) * 1000,\ .step_uV = (step) * 1000,\ .activate_bit = (abits),\ } #define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \ {\ .reg_desc = {\ .name = #_id,\ .ops = &da9052_dcdc_ops,\ .type = REGULATOR_VOLTAGE,\ .id = DA9052_ID_##_id,\ .n_voltages = (max - min) / step + 1, \ .owner = THIS_MODULE,\ .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ .vsel_mask = (1 << (sbits)) - 1,\ .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ .enable_mask = 1 << (ebits),\ },\ .min_uV = (min) * 1000,\ .max_uV = (max) * 1000,\ .step_uV = (step) * 1000,\ .activate_bit = (abits),\ } static struct da9052_regulator_info da9052_regulator_info[] = { DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO), DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO), DA9052_DCDC(BUCK3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO), DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0), DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0), DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO), DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO), DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0), DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0), DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0), }; static struct da9052_regulator_info da9053_regulator_info[] = { DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO), DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO), DA9052_DCDC(BUCK3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO), DA9052_DCDC(BUCK4, 25, 950, 2525, 6, 6, 0), DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0), DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO), DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO), DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0), DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0), DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0), DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0), }; static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id, int id) { struct da9052_regulator_info *info; int i; switch (chip_id) { case DA9052: for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) { info = &da9052_regulator_info[i]; if (info->reg_desc.id == id) return info; } break; case DA9053_AA: case DA9053_BA: case DA9053_BB: case DA9053_BC: for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) { info = &da9053_regulator_info[i]; if (info->reg_desc.id == id) return info; } break; } return NULL; } static int da9052_regulator_probe(struct platform_device *pdev) { const struct mfd_cell *cell = mfd_get_cell(pdev); struct regulator_config config = { }; struct da9052_regulator *regulator; struct da9052 *da9052; struct da9052_pdata *pdata; regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator), GFP_KERNEL); if (!regulator) return -ENOMEM; da9052 = dev_get_drvdata(pdev->dev.parent); pdata = dev_get_platdata(da9052->dev); regulator->da9052 = da9052; regulator->info = find_regulator_info(regulator->da9052->chip_id, cell->id); if (regulator->info == NULL) { dev_err(&pdev->dev, "invalid regulator ID specified\n"); return -EINVAL; } config.dev = &pdev->dev; config.driver_data = regulator; config.regmap = da9052->regmap; if (pdata && pdata->regulators) { config.init_data = pdata->regulators[cell->id]; } else { #ifdef CONFIG_OF struct device_node *nproot = da9052->dev->of_node; struct device_node *np; if (!nproot) return -ENODEV; nproot = of_get_child_by_name(nproot, "regulators"); if (!nproot) return -ENODEV; for_each_child_of_node(nproot, np) { if (!of_node_cmp(np->name, regulator->info->reg_desc.name)) { config.init_data = of_get_regulator_init_data( &pdev->dev, np, ®ulator->info->reg_desc); config.of_node = np; break; } } of_node_put(nproot); #endif } 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); } platform_set_drvdata(pdev, regulator); return 0; } static struct platform_driver da9052_regulator_driver = { .probe = da9052_regulator_probe, .driver = { .name = "da9052-regulator", }, }; static int __init da9052_regulator_init(void) { return platform_driver_register(&da9052_regulator_driver); } subsys_initcall(da9052_regulator_init); static void __exit da9052_regulator_exit(void) { platform_driver_unregister(&da9052_regulator_driver); } module_exit(da9052_regulator_exit); MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:da9052-regulator");