/* * Copyright (C) ST-Ericsson SA 2010 * * License Terms: GNU General Public License v2 * * Author: Sundar Iyer for ST-Ericsson * * AB8500 peripheral regulators * * AB8500 supports the following regulators, * LDOs - VAUDIO, VANAMIC2/2, VDIGMIC, VINTCORE12, VTVOUT, * VAUX1/2/3, VANA * * for DB8500 cut 1.0 and previous versions of the silicon, all accesses * to registers are through the DB8500 SPI. In cut 1.1 onwards, these * accesses are through the DB8500 PRCMU I2C * */ #include #include #include #include #include #include #include #include #include /** * struct ab8500_regulator_info - ab8500 regulator information * @desc: regulator description * @ab8500: ab8500 parent * @regulator_dev: regulator device * @max_uV: maximum voltage (for variable voltage supplies) * @min_uV: minimum voltage (for variable voltage supplies) * @fixed_uV: typical voltage (for fixed voltage supplies) * @update_bank: bank to control on/off * @update_reg: register to control on/off * @mask: mask to enable/disable regulator * @enable: bits to enable the regulator in normal(high power) mode * @voltage_bank: bank to control regulator voltage * @voltage_reg: register to control regulator voltage * @voltage_mask: mask to control regulator voltage * @supported_voltages: supported voltage table * @voltages_len: number of supported voltages for the regulator */ struct ab8500_regulator_info { struct device *dev; struct regulator_desc desc; struct ab8500 *ab8500; struct regulator_dev *regulator; int max_uV; int min_uV; int fixed_uV; u8 update_bank; u8 update_reg; u8 mask; u8 enable; u8 voltage_bank; u8 voltage_reg; u8 voltage_mask; int const *supported_voltages; int voltages_len; }; /* voltage tables for the vauxn/vintcore supplies */ static const int ldo_vauxn_voltages[] = { 1100000, 1200000, 1300000, 1400000, 1500000, 1800000, 1850000, 1900000, 2500000, 2650000, 2700000, 2750000, 2800000, 2900000, 3000000, 3300000, }; static const int ldo_vintcore_voltages[] = { 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, }; static int ab8500_regulator_enable(struct regulator_dev *rdev) { int regulator_id, ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; ret = abx500_mask_and_set_register_interruptible(info->dev, info->update_bank, info->update_reg, info->mask, info->enable); if (ret < 0) dev_err(rdev_get_dev(rdev), "couldn't set enable bits for regulator\n"); return ret; } static int ab8500_regulator_disable(struct regulator_dev *rdev) { int regulator_id, ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; ret = abx500_mask_and_set_register_interruptible(info->dev, info->update_bank, info->update_reg, info->mask, 0x0); if (ret < 0) dev_err(rdev_get_dev(rdev), "couldn't set disable bits for regulator\n"); return ret; } static int ab8500_regulator_is_enabled(struct regulator_dev *rdev) { int regulator_id, ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); u8 value; regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; ret = abx500_get_register_interruptible(info->dev, info->update_bank, info->update_reg, &value); if (ret < 0) { dev_err(rdev_get_dev(rdev), "couldn't read 0x%x register\n", info->update_reg); return ret; } if (value & info->mask) return true; else return false; } static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector) { int regulator_id; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; /* return the uV for the fixed regulators */ if (info->fixed_uV) return info->fixed_uV; if (selector >= info->voltages_len) return -EINVAL; return info->supported_voltages[selector]; } static int ab8500_regulator_get_voltage(struct regulator_dev *rdev) { int regulator_id, ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); u8 value; regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; ret = abx500_get_register_interruptible(info->dev, info->voltage_bank, info->voltage_reg, &value); if (ret < 0) { dev_err(rdev_get_dev(rdev), "couldn't read voltage reg for regulator\n"); return ret; } /* vintcore has a different layout */ value &= info->voltage_mask; if (regulator_id == AB8500_LDO_INTCORE) ret = info->supported_voltages[value >> 0x3]; else ret = info->supported_voltages[value]; return ret; } static int ab8500_get_best_voltage_index(struct regulator_dev *rdev, int min_uV, int max_uV) { struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); int i; /* check the supported voltage */ for (i = 0; i < info->voltages_len; i++) { if ((info->supported_voltages[i] >= min_uV) && (info->supported_voltages[i] <= max_uV)) return i; } return -EINVAL; } static int ab8500_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { int regulator_id, ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; /* get the appropriate voltages within the range */ ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV); if (ret < 0) { dev_err(rdev_get_dev(rdev), "couldn't get best voltage for regulator\n"); return ret; } *selector = ret; /* set the registers for the request */ ret = abx500_mask_and_set_register_interruptible(info->dev, info->voltage_bank, info->voltage_reg, info->voltage_mask, (u8)ret); if (ret < 0) dev_err(rdev_get_dev(rdev), "couldn't set voltage reg for regulator\n"); return ret; } static struct regulator_ops ab8500_regulator_ops = { .enable = ab8500_regulator_enable, .disable = ab8500_regulator_disable, .is_enabled = ab8500_regulator_is_enabled, .get_voltage = ab8500_regulator_get_voltage, .set_voltage = ab8500_regulator_set_voltage, .list_voltage = ab8500_list_voltage, }; static int ab8500_fixed_get_voltage(struct regulator_dev *rdev) { int regulator_id; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); regulator_id = rdev_get_id(rdev); if (regulator_id >= AB8500_NUM_REGULATORS) return -EINVAL; return info->fixed_uV; } static struct regulator_ops ab8500_ldo_fixed_ops = { .enable = ab8500_regulator_enable, .disable = ab8500_regulator_disable, .is_enabled = ab8500_regulator_is_enabled, .get_voltage = ab8500_fixed_get_voltage, .list_voltage = ab8500_list_voltage, }; #define AB8500_LDO(_id, min, max, bank, reg, reg_mask, \ reg_enable, volt_bank, volt_reg, volt_mask, \ voltages, len_volts) \ { \ .desc = { \ .name = "LDO-" #_id, \ .ops = &ab8500_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = AB8500_LDO_##_id, \ .owner = THIS_MODULE, \ }, \ .min_uV = (min) * 1000, \ .max_uV = (max) * 1000, \ .update_bank = bank, \ .update_reg = reg, \ .mask = reg_mask, \ .enable = reg_enable, \ .voltage_bank = volt_bank, \ .voltage_reg = volt_reg, \ .voltage_mask = volt_mask, \ .supported_voltages = voltages, \ .voltages_len = len_volts, \ .fixed_uV = 0, \ } #define AB8500_FIXED_LDO(_id, fixed, bank, reg, \ reg_mask, reg_enable) \ { \ .desc = { \ .name = "LDO-" #_id, \ .ops = &ab8500_ldo_fixed_ops, \ .type = REGULATOR_VOLTAGE, \ .id = AB8500_LDO_##_id, \ .owner = THIS_MODULE, \ }, \ .fixed_uV = fixed * 1000, \ .update_bank = bank, \ .update_reg = reg, \ .mask = reg_mask, \ .enable = reg_enable, \ } static struct ab8500_regulator_info ab8500_regulator_info[] = { /* * Variable Voltage LDOs * name, min uV, max uV, ctrl bank, ctrl reg, reg mask, enable mask, * volt ctrl bank, volt ctrl reg, volt ctrl mask, volt table, * num supported volts */ AB8500_LDO(AUX1, 1100, 3300, 0x04, 0x09, 0x3, 0x1, 0x04, 0x1f, 0xf, ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), AB8500_LDO(AUX2, 1100, 3300, 0x04, 0x09, 0xc, 0x4, 0x04, 0x20, 0xf, ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), AB8500_LDO(AUX3, 1100, 3300, 0x04, 0x0a, 0x3, 0x1, 0x04, 0x21, 0xf, ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), AB8500_LDO(INTCORE, 1100, 3300, 0x03, 0x80, 0x4, 0x4, 0x03, 0x80, 0x38, ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)), /* * Fixed Voltage LDOs * name, o/p uV, ctrl bank, ctrl reg, enable, disable */ AB8500_FIXED_LDO(TVOUT, 2000, 0x03, 0x80, 0x2, 0x2), AB8500_FIXED_LDO(AUDIO, 2000, 0x03, 0x83, 0x2, 0x2), AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03, 0x83, 0x4, 0x4), AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03, 0x83, 0x8, 0x8), AB8500_FIXED_LDO(DMIC, 1800, 0x03, 0x83, 0x10, 0x10), AB8500_FIXED_LDO(ANA, 1200, 0x03, 0x83, 0xc, 0x4), }; static inline struct ab8500_regulator_info *find_regulator_info(int id) { struct ab8500_regulator_info *info; int i; for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { info = &ab8500_regulator_info[i]; if (info->desc.id == id) return info; } return NULL; } static __devinit int ab8500_regulator_probe(struct platform_device *pdev) { struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); struct ab8500_platform_data *pdata; int i, err; if (!ab8500) { dev_err(&pdev->dev, "null mfd parent\n"); return -EINVAL; } pdata = dev_get_platdata(ab8500->dev); /* register all regulators */ for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { struct ab8500_regulator_info *info = NULL; /* assign per-regulator data */ info = &ab8500_regulator_info[i]; info->dev = &pdev->dev; info->ab8500 = ab8500; info->regulator = regulator_register(&info->desc, &pdev->dev, pdata->regulator[i], info); if (IS_ERR(info->regulator)) { err = PTR_ERR(info->regulator); dev_err(&pdev->dev, "failed to register regulator %s\n", info->desc.name); /* when we fail, un-register all earlier regulators */ while (--i >= 0) { info = &ab8500_regulator_info[i]; regulator_unregister(info->regulator); } return err; } } return 0; } static __devexit int ab8500_regulator_remove(struct platform_device *pdev) { int i; for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { struct ab8500_regulator_info *info = NULL; info = &ab8500_regulator_info[i]; regulator_unregister(info->regulator); } return 0; } static struct platform_driver ab8500_regulator_driver = { .probe = ab8500_regulator_probe, .remove = __devexit_p(ab8500_regulator_remove), .driver = { .name = "ab8500-regulator", .owner = THIS_MODULE, }, }; static int __init ab8500_regulator_init(void) { int ret; ret = platform_driver_register(&ab8500_regulator_driver); if (ret != 0) pr_err("Failed to register ab8500 regulator: %d\n", ret); return ret; } subsys_initcall(ab8500_regulator_init); static void __exit ab8500_regulator_exit(void) { platform_driver_unregister(&ab8500_regulator_driver); } module_exit(ab8500_regulator_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Sundar Iyer "); MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC"); MODULE_ALIAS("platform:ab8500-regulator");