/* * Copyright (C) ST-Ericsson SA 2010 * * License Terms: GNU General Public License v2 * * Authors: Sundar Iyer for ST-Ericsson * Bengt Jonsson for ST-Ericsson * * AB8500 peripheral regulators * * AB8500 supports the following regulators: * VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA */ #include #include #include #include #include #include #include #include #include /** * struct ab8500_regulator_info - ab8500 regulator information * @dev: device pointer * @desc: regulator description * @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 * @update_mask: mask to enable/disable regulator * @update_val_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 * @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 regulator_dev *regulator; int max_uV; int min_uV; int fixed_uV; u8 update_bank; u8 update_reg; u8 update_mask; u8 update_val_enable; u8 voltage_bank; u8 voltage_reg; u8 voltage_mask; int const *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_vaux3_voltages[] = { 1200000, 1500000, 1800000, 2100000, 2500000, 2750000, 2790000, 2910000, }; static const int ldo_vintcore_voltages[] = { 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, }; static int ab8500_regulator_enable(struct regulator_dev *rdev) { int ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); return -EINVAL; } ret = abx500_mask_and_set_register_interruptible(info->dev, info->update_bank, info->update_reg, info->update_mask, info->update_val_enable); if (ret < 0) dev_err(rdev_get_dev(rdev), "couldn't set enable bits for regulator\n"); dev_vdbg(rdev_get_dev(rdev), "%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n", info->desc.name, info->update_bank, info->update_reg, info->update_mask, info->update_val_enable); return ret; } static int ab8500_regulator_disable(struct regulator_dev *rdev) { int ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); return -EINVAL; } ret = abx500_mask_and_set_register_interruptible(info->dev, info->update_bank, info->update_reg, info->update_mask, 0x0); if (ret < 0) dev_err(rdev_get_dev(rdev), "couldn't set disable bits for regulator\n"); dev_vdbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n", info->desc.name, info->update_bank, info->update_reg, info->update_mask, 0x0); return ret; } static int ab8500_regulator_is_enabled(struct regulator_dev *rdev) { int ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); u8 regval; if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); return -EINVAL; } ret = abx500_get_register_interruptible(info->dev, info->update_bank, info->update_reg, ®val); if (ret < 0) { dev_err(rdev_get_dev(rdev), "couldn't read 0x%x register\n", info->update_reg); return ret; } dev_vdbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x," " 0x%x\n", info->desc.name, info->update_bank, info->update_reg, info->update_mask, regval); if (regval & info->update_mask) return true; else return false; } static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector) { struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); 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->voltages[selector]; } static int ab8500_regulator_get_voltage(struct regulator_dev *rdev) { int ret, val; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); u8 regval; if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); return -EINVAL; } ret = abx500_get_register_interruptible(info->dev, info->voltage_bank, info->voltage_reg, ®val); if (ret < 0) { dev_err(rdev_get_dev(rdev), "couldn't read voltage reg for regulator\n"); return ret; } dev_vdbg(rdev_get_dev(rdev), "%s-get_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x," " 0x%x\n", info->desc.name, info->voltage_bank, info->voltage_reg, info->voltage_mask, regval); /* vintcore has a different layout */ val = regval & info->voltage_mask; if (info->desc.id == AB8500_LDO_INTCORE) ret = info->voltages[val >> 0x3]; else ret = info->voltages[val]; 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->voltages[i] >= min_uV) && (info->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 ret; struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); u8 regval; if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); 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 */ regval = (u8)ret; ret = abx500_mask_and_set_register_interruptible(info->dev, info->voltage_bank, info->voltage_reg, info->voltage_mask, regval); if (ret < 0) dev_err(rdev_get_dev(rdev), "couldn't set voltage reg for regulator\n"); dev_vdbg(rdev_get_dev(rdev), "%s-set_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x," " 0x%x\n", info->desc.name, info->voltage_bank, info->voltage_reg, info->voltage_mask, regval); 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) { struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) { dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); return -EINVAL; } return info->fixed_uV; } static struct regulator_ops ab8500_regulator_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, }; static struct ab8500_regulator_info ab8500_regulator_info[AB8500_NUM_REGULATORS] = { /* * Variable Voltage Regulators * name, min mV, max mV, * update bank, reg, mask, enable val * volt bank, reg, mask, table, table length */ [AB8500_LDO_AUX1] = { .desc = { .name = "LDO-AUX1", .ops = &ab8500_regulator_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_AUX1, .owner = THIS_MODULE, .n_voltages = ARRAY_SIZE(ldo_vauxn_voltages), }, .min_uV = 1100000, .max_uV = 3300000, .update_bank = 0x04, .update_reg = 0x09, .update_mask = 0x03, .update_val_enable = 0x01, .voltage_bank = 0x04, .voltage_reg = 0x1f, .voltage_mask = 0x0f, .voltages = ldo_vauxn_voltages, .voltages_len = ARRAY_SIZE(ldo_vauxn_voltages), }, [AB8500_LDO_AUX2] = { .desc = { .name = "LDO-AUX2", .ops = &ab8500_regulator_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_AUX2, .owner = THIS_MODULE, .n_voltages = ARRAY_SIZE(ldo_vauxn_voltages), }, .min_uV = 1100000, .max_uV = 3300000, .update_bank = 0x04, .update_reg = 0x09, .update_mask = 0x0c, .update_val_enable = 0x04, .voltage_bank = 0x04, .voltage_reg = 0x20, .voltage_mask = 0x0f, .voltages = ldo_vauxn_voltages, .voltages_len = ARRAY_SIZE(ldo_vauxn_voltages), }, [AB8500_LDO_AUX3] = { .desc = { .name = "LDO-AUX3", .ops = &ab8500_regulator_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_AUX3, .owner = THIS_MODULE, .n_voltages = ARRAY_SIZE(ldo_vaux3_voltages), }, .min_uV = 1100000, .max_uV = 3300000, .update_bank = 0x04, .update_reg = 0x0a, .update_mask = 0x03, .update_val_enable = 0x01, .voltage_bank = 0x04, .voltage_reg = 0x21, .voltage_mask = 0x07, .voltages = ldo_vaux3_voltages, .voltages_len = ARRAY_SIZE(ldo_vaux3_voltages), }, [AB8500_LDO_INTCORE] = { .desc = { .name = "LDO-INTCORE", .ops = &ab8500_regulator_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_INTCORE, .owner = THIS_MODULE, .n_voltages = ARRAY_SIZE(ldo_vintcore_voltages), }, .min_uV = 1100000, .max_uV = 3300000, .update_bank = 0x03, .update_reg = 0x80, .update_mask = 0x44, .update_val_enable = 0x04, .voltage_bank = 0x03, .voltage_reg = 0x80, .voltage_mask = 0x38, .voltages = ldo_vintcore_voltages, .voltages_len = ARRAY_SIZE(ldo_vintcore_voltages), }, /* * Fixed Voltage Regulators * name, fixed mV, * update bank, reg, mask, enable val */ [AB8500_LDO_TVOUT] = { .desc = { .name = "LDO-TVOUT", .ops = &ab8500_regulator_fixed_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_TVOUT, .owner = THIS_MODULE, .n_voltages = 1, }, .fixed_uV = 2000000, .update_bank = 0x03, .update_reg = 0x80, .update_mask = 0x82, .update_val_enable = 0x02, }, [AB8500_LDO_AUDIO] = { .desc = { .name = "LDO-AUDIO", .ops = &ab8500_regulator_fixed_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_AUDIO, .owner = THIS_MODULE, .n_voltages = 1, }, .fixed_uV = 2000000, .update_bank = 0x03, .update_reg = 0x83, .update_mask = 0x02, .update_val_enable = 0x02, }, [AB8500_LDO_ANAMIC1] = { .desc = { .name = "LDO-ANAMIC1", .ops = &ab8500_regulator_fixed_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_ANAMIC1, .owner = THIS_MODULE, .n_voltages = 1, }, .fixed_uV = 2050000, .update_bank = 0x03, .update_reg = 0x83, .update_mask = 0x08, .update_val_enable = 0x08, }, [AB8500_LDO_ANAMIC2] = { .desc = { .name = "LDO-ANAMIC2", .ops = &ab8500_regulator_fixed_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_ANAMIC2, .owner = THIS_MODULE, .n_voltages = 1, }, .fixed_uV = 2050000, .update_bank = 0x03, .update_reg = 0x83, .update_mask = 0x10, .update_val_enable = 0x10, }, [AB8500_LDO_DMIC] = { .desc = { .name = "LDO-DMIC", .ops = &ab8500_regulator_fixed_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_DMIC, .owner = THIS_MODULE, .n_voltages = 1, }, .fixed_uV = 1800000, .update_bank = 0x03, .update_reg = 0x83, .update_mask = 0x04, .update_val_enable = 0x04, }, [AB8500_LDO_ANA] = { .desc = { .name = "LDO-ANA", .ops = &ab8500_regulator_fixed_ops, .type = REGULATOR_VOLTAGE, .id = AB8500_LDO_ANA, .owner = THIS_MODULE, .n_voltages = 1, }, .fixed_uV = 1200000, .update_bank = 0x04, .update_reg = 0x06, .update_mask = 0x0c, .update_val_enable = 0x04, }, }; 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); if (!pdata) { dev_err(&pdev->dev, "null pdata\n"); return -EINVAL; } /* make sure the platform data has the correct size */ if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) { dev_err(&pdev->dev, "platform configuration error\n"); return -EINVAL; } /* 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; /* fix for hardware before ab8500v2.0 */ if (abx500_get_chip_id(info->dev) < 0x20) { if (info->desc.id == AB8500_LDO_AUX3) { info->desc.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages); info->voltages = ldo_vauxn_voltages; info->voltages_len = ARRAY_SIZE(ldo_vauxn_voltages); info->voltage_mask = 0xf; } } /* register regulator with framework */ 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; } dev_vdbg(rdev_get_dev(info->regulator), "%s-probed\n", info->desc.name); } 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]; dev_vdbg(rdev_get_dev(info->regulator), "%s-remove\n", info->desc.name); 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");