/* NXP PCF50633 PMIC Driver * * (C) 2006-2008 by Openmoko, Inc. * Author: Balaji Rao <balajirrao@openmoko.org> * 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 <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/device.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/mfd/pcf50633/core.h> #include <linux/mfd/pcf50633/pmic.h> #define PCF50633_REGULATOR(_name, _id) \ { \ .name = _name, \ .id = _id, \ .ops = &pcf50633_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ } static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = { [PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT, [PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT, [PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT, [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT, [PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT, [PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT, [PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT, [PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT, [PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT, [PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT, [PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT, }; /* Bits from voltage value */ static u8 auto_voltage_bits(unsigned int millivolts) { if (millivolts < 1800) return 0; 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) { 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) { 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 = pcf50633_regulator_registers[regulator_id]; 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: volt_bits = ldo_voltage_bits(millivolts); break; default: return -EINVAL; } return pcf50633_reg_write(pcf, regnr, volt_bits); } static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev) { struct pcf50633 *pcf; int regulator_id, millivolts, volt_bits; u8 regnr; pcf = rdev_get_drvdata(rdev);; regulator_id = rdev_get_id(rdev); if (regulator_id >= PCF50633_NUM_REGULATORS) return -EINVAL; regnr = pcf50633_regulator_registers[regulator_id]; volt_bits = pcf50633_reg_read(pcf, regnr); if (volt_bits < 0) return -1; switch (regulator_id) { case PCF50633_REGULATOR_AUTO: millivolts = auto_voltage_value(volt_bits); break; case PCF50633_REGULATOR_DOWN1: millivolts = down_voltage_value(volt_bits); break; case PCF50633_REGULATOR_DOWN2: millivolts = down_voltage_value(volt_bits); 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: millivolts = ldo_voltage_value(volt_bits); break; default: return -EINVAL; } return millivolts * 1000; } static int pcf50633_regulator_enable(struct regulator_dev *rdev) { struct pcf50633 *pcf = rdev_get_drvdata(rdev); int regulator_id; u8 regnr; regulator_id = rdev_get_id(rdev); if (regulator_id >= PCF50633_NUM_REGULATORS) return -EINVAL; /* The *ENA register is always one after the *OUT register */ regnr = pcf50633_regulator_registers[regulator_id] + 1; return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON, PCF50633_REGULATOR_ON); } static int pcf50633_regulator_disable(struct regulator_dev *rdev) { struct pcf50633 *pcf = rdev_get_drvdata(rdev); int regulator_id; u8 regnr; regulator_id = rdev_get_id(rdev); if (regulator_id >= PCF50633_NUM_REGULATORS) return -EINVAL; /* the *ENA register is always one after the *OUT register */ regnr = pcf50633_regulator_registers[regulator_id] + 1; return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON, 0); } static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev) { struct pcf50633 *pcf = rdev_get_drvdata(rdev); int regulator_id = rdev_get_id(rdev); u8 regnr; regulator_id = rdev_get_id(rdev); if (regulator_id >= PCF50633_NUM_REGULATORS) return -EINVAL; /* the *ENA register is always one after the *OUT register */ regnr = pcf50633_regulator_registers[regulator_id] + 1; return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON; } static struct regulator_ops pcf50633_regulator_ops = { .set_voltage = pcf50633_regulator_set_voltage, .get_voltage = pcf50633_regulator_get_voltage, .enable = pcf50633_regulator_enable, .disable = pcf50633_regulator_disable, .is_enabled = pcf50633_regulator_is_enabled, }; static struct regulator_desc regulators[] = { [PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO), [PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1), [PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2), [PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1), [PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2), [PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3), [PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4), [PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5), [PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6), [PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO), [PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO), }; static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) { struct regulator_dev *rdev; struct pcf50633 *pcf; /* Already set by core driver */ pcf = platform_get_drvdata(pdev); rdev = regulator_register(®ulators[pdev->id], &pdev->dev, pcf); if (IS_ERR(rdev)) return PTR_ERR(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); 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); } module_init(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 <balajirrao@openmoko.org>"); MODULE_DESCRIPTION("PCF50633 regulator driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pcf50633-regulator");