/* * da9052-regulator.c: Regulator driver for DA9052 * * Copyright(c) 2011 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 /* 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 volt_shift; unsigned char en_bit; 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_regulator_enable(struct regulator_dev *rdev) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int offset = rdev_get_id(rdev); return da9052_reg_update(regulator->da9052, DA9052_BUCKCORE_REG + offset, 1 << info->en_bit, 1 << info->en_bit); } static int da9052_regulator_disable(struct regulator_dev *rdev) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int offset = rdev_get_id(rdev); return da9052_reg_update(regulator->da9052, DA9052_BUCKCORE_REG + offset, 1 << info->en_bit, 0); } static int da9052_regulator_is_enabled(struct regulator_dev *rdev) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int offset = rdev_get_id(rdev); int ret; ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset); if (ret < 0) return ret; return ret & (1 << info->en_bit); } 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; if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] || max_uA < da9052_current_limits[row][DA9052_MIN_UA]) return -EINVAL; for (i = 0; i < DA9052_CURRENT_RANGE; i++) { if (min_uA <= da9052_current_limits[row][i]) { reg_val = i; break; } } /* 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_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, 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 = 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)) { *selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV + DIV_ROUND_UP(min_uV - DA9052_CONST_3uV, DA9052_BUCK_PERI_3uV_STEP); } else { *selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV); } ret = da9052_list_voltage(rdev, *selector); if (ret < 0) return ret; ret = da9052_reg_update(regulator->da9052, DA9052_BUCKCORE_REG + id, (1 << info->volt_shift) - 1, *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_get_regulator_voltage_sel(struct regulator_dev *rdev) { struct da9052_regulator *regulator = rdev_get_drvdata(rdev); struct da9052_regulator_info *info = regulator->info; int offset = rdev_get_id(rdev); int ret; ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset); if (ret < 0) return ret; ret &= ((1 << info->volt_shift) - 1); return ret; } static struct regulator_ops da9052_dcdc_ops = { .set_voltage = da9052_regulator_set_voltage, .get_current_limit = da9052_dcdc_get_current_limit, .set_current_limit = da9052_dcdc_set_current_limit, .list_voltage = da9052_list_voltage, .get_voltage_sel = da9052_get_regulator_voltage_sel, .is_enabled = da9052_regulator_is_enabled, .enable = da9052_regulator_enable, .disable = da9052_regulator_disable, }; static struct regulator_ops da9052_ldo_ops = { .set_voltage = da9052_regulator_set_voltage, .list_voltage = da9052_list_voltage, .get_voltage_sel = da9052_get_regulator_voltage_sel, .is_enabled = da9052_regulator_is_enabled, .enable = da9052_regulator_enable, .disable = da9052_regulator_disable, }; #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,\ },\ .min_uV = (min) * 1000,\ .max_uV = (max) * 1000,\ .step_uV = (step) * 1000,\ .volt_shift = (sbits),\ .en_bit = (ebits),\ .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,\ },\ .min_uV = (min) * 1000,\ .max_uV = (max) * 1000,\ .step_uV = (step) * 1000,\ .volt_shift = (sbits),\ .en_bit = (ebits),\ .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, 925, 2500, 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, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO), DA9052_DCDC(BUCK4, 25, 925, 2500, 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: 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 __devinit da9052_regulator_probe(struct platform_device *pdev) { struct da9052_regulator *regulator; struct da9052 *da9052; struct da9052_pdata *pdata; int ret; regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator), GFP_KERNEL); if (!regulator) return -ENOMEM; da9052 = dev_get_drvdata(pdev->dev.parent); pdata = da9052->dev->platform_data; regulator->da9052 = da9052; regulator->info = find_regulator_info(regulator->da9052->chip_id, pdev->id); if (regulator->info == NULL) { dev_err(&pdev->dev, "invalid regulator ID specified\n"); ret = -EINVAL; goto err; } regulator->rdev = regulator_register(®ulator->info->reg_desc, &pdev->dev, pdata->regulators[pdev->id], regulator, NULL); if (IS_ERR(regulator->rdev)) { dev_err(&pdev->dev, "failed to register regulator %s\n", regulator->info->reg_desc.name); ret = PTR_ERR(regulator->rdev); goto err; } platform_set_drvdata(pdev, regulator); return 0; err: devm_kfree(&pdev->dev, regulator); return ret; } static int __devexit da9052_regulator_remove(struct platform_device *pdev) { struct da9052_regulator *regulator = platform_get_drvdata(pdev); regulator_unregister(regulator->rdev); devm_kfree(&pdev->dev, regulator); return 0; } static struct platform_driver da9052_regulator_driver = { .probe = da9052_regulator_probe, .remove = __devexit_p(da9052_regulator_remove), .driver = { .name = "da9052-regulator", .owner = THIS_MODULE, }, }; 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 "); MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:da9052-regulator");