/* NXP PCF50633 PMIC Driver * * (C) 2006-2008 by Openmoko, Inc. * Author: Balaji Rao * All rights reserved. * * Broken down from monstrous PCF50633 driver mainly by * Harald Welte and Andy Green and Werner Almesberger * * 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 #define PCF50633_REGULATOR(_name, _id, _n) \ { \ .name = _name, \ .id = PCF50633_REGULATOR_##_id, \ .ops = &pcf50633_regulator_ops, \ .n_voltages = _n, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = PCF50633_REG_##_id##OUT, \ .vsel_mask = 0xff, \ .enable_reg = PCF50633_REG_##_id##OUT + 1, \ .enable_mask = PCF50633_REGULATOR_ON, \ } /* Bits from voltage value */ static u8 auto_voltage_bits(unsigned int millivolts) { if (millivolts < 1800) return 0x2f; if (millivolts > 3800) return 0xff; millivolts -= 625; return millivolts / 25; } static u8 down_voltage_bits(unsigned int millivolts) { if (millivolts < 625) return 0; else if (millivolts > 3000) return 0xff; millivolts -= 625; return millivolts / 25; } static u8 ldo_voltage_bits(unsigned int millivolts) { if (millivolts < 900) return 0; else if (millivolts > 3600) return 0x1f; millivolts -= 900; return millivolts / 100; } /* Obtain voltage value from bits */ static unsigned int auto_voltage_value(u8 bits) { /* AUTOOUT: 00000000 to 00101110 are reserved. * Return 0 for bits in reserved range, which means this selector code * can't be used on this system */ if (bits < 0x2f) return 0; return 625 + (bits * 25); } static unsigned int down_voltage_value(u8 bits) { return 625 + (bits * 25); } static unsigned int ldo_voltage_value(u8 bits) { bits &= 0x1f; return 900 + (bits * 100); } static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { struct pcf50633 *pcf; int regulator_id, millivolts; u8 volt_bits, regnr; pcf = rdev_get_drvdata(rdev); regulator_id = rdev_get_id(rdev); if (regulator_id >= PCF50633_NUM_REGULATORS) return -EINVAL; millivolts = min_uV / 1000; regnr = rdev->desc->vsel_reg; switch (regulator_id) { case PCF50633_REGULATOR_AUTO: volt_bits = auto_voltage_bits(millivolts); break; case PCF50633_REGULATOR_DOWN1: volt_bits = down_voltage_bits(millivolts); break; case PCF50633_REGULATOR_DOWN2: volt_bits = down_voltage_bits(millivolts); break; case PCF50633_REGULATOR_LDO1: case PCF50633_REGULATOR_LDO2: case PCF50633_REGULATOR_LDO3: case PCF50633_REGULATOR_LDO4: case PCF50633_REGULATOR_LDO5: case PCF50633_REGULATOR_LDO6: case PCF50633_REGULATOR_HCLDO: case PCF50633_REGULATOR_MEMLDO: volt_bits = ldo_voltage_bits(millivolts); break; default: return -EINVAL; } *selector = volt_bits; return pcf50633_reg_write(pcf, regnr, volt_bits); } static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev, unsigned int index) { int regulator_id = rdev_get_id(rdev); int millivolts; switch (regulator_id) { case PCF50633_REGULATOR_AUTO: millivolts = auto_voltage_value(index); break; case PCF50633_REGULATOR_DOWN1: millivolts = down_voltage_value(index); break; case PCF50633_REGULATOR_DOWN2: millivolts = down_voltage_value(index); break; case PCF50633_REGULATOR_LDO1: case PCF50633_REGULATOR_LDO2: case PCF50633_REGULATOR_LDO3: case PCF50633_REGULATOR_LDO4: case PCF50633_REGULATOR_LDO5: case PCF50633_REGULATOR_LDO6: case PCF50633_REGULATOR_HCLDO: case PCF50633_REGULATOR_MEMLDO: millivolts = ldo_voltage_value(index); break; default: return -EINVAL; } return millivolts * 1000; } static struct regulator_ops pcf50633_regulator_ops = { .set_voltage = pcf50633_regulator_set_voltage, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = pcf50633_regulator_list_voltage, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; static const struct regulator_desc regulators[] = { [PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128), [PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96), [PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96), [PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28), [PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28), [PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28), [PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28), [PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28), [PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28), [PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28), [PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28), }; static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) { struct regulator_dev *rdev; struct pcf50633 *pcf; struct regulator_config config = { }; /* Already set by core driver */ pcf = dev_to_pcf50633(pdev->dev.parent); config.dev = &pdev->dev; config.init_data = pdev->dev.platform_data; config.driver_data = pcf; config.regmap = pcf->regmap; rdev = regulator_register(®ulators[pdev->id], &config); if (IS_ERR(rdev)) return PTR_ERR(rdev); platform_set_drvdata(pdev, rdev); if (pcf->pdata->regulator_registered) pcf->pdata->regulator_registered(pcf, pdev->id); return 0; } static int __devexit pcf50633_regulator_remove(struct platform_device *pdev) { struct regulator_dev *rdev = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); regulator_unregister(rdev); return 0; } static struct platform_driver pcf50633_regulator_driver = { .driver = { .name = "pcf50633-regltr", }, .probe = pcf50633_regulator_probe, .remove = __devexit_p(pcf50633_regulator_remove), }; static int __init pcf50633_regulator_init(void) { return platform_driver_register(&pcf50633_regulator_driver); } subsys_initcall(pcf50633_regulator_init); static void __exit pcf50633_regulator_exit(void) { platform_driver_unregister(&pcf50633_regulator_driver); } module_exit(pcf50633_regulator_exit); MODULE_AUTHOR("Balaji Rao "); MODULE_DESCRIPTION("PCF50633 regulator driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pcf50633-regulator");