259 lines
6.4 KiB
C
259 lines
6.4 KiB
C
/* NXP PCF50633 PMIC Driver
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*
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* (C) 2006-2008 by Openmoko, Inc.
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* Author: Balaji Rao <balajirrao@openmoko.org>
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* All rights reserved.
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*
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* Broken down from monstrous PCF50633 driver mainly by
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* Harald Welte and Andy Green and Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/pcf50633/core.h>
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#include <linux/mfd/pcf50633/pmic.h>
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#define PCF50633_REGULATOR(_name, _id, _n) \
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{ \
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.name = _name, \
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.id = PCF50633_REGULATOR_##_id, \
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.ops = &pcf50633_regulator_ops, \
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.n_voltages = _n, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.vsel_reg = PCF50633_REG_##_id##OUT, \
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.vsel_mask = 0xff, \
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.enable_reg = PCF50633_REG_##_id##OUT + 1, \
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.enable_mask = PCF50633_REGULATOR_ON, \
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}
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/* Bits from voltage value */
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static u8 auto_voltage_bits(unsigned int millivolts)
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{
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if (millivolts < 1800)
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return 0x2f;
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if (millivolts > 3800)
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return 0xff;
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millivolts -= 625;
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return millivolts / 25;
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}
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static u8 down_voltage_bits(unsigned int millivolts)
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{
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if (millivolts < 625)
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return 0;
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else if (millivolts > 3000)
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return 0xff;
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millivolts -= 625;
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return millivolts / 25;
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}
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static u8 ldo_voltage_bits(unsigned int millivolts)
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{
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if (millivolts < 900)
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return 0;
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else if (millivolts > 3600)
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return 0x1f;
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millivolts -= 900;
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return millivolts / 100;
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}
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/* Obtain voltage value from bits */
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static unsigned int auto_voltage_value(u8 bits)
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{
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/* AUTOOUT: 00000000 to 00101110 are reserved.
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* Return 0 for bits in reserved range, which means this selector code
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* can't be used on this system */
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if (bits < 0x2f)
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return 0;
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return 625 + (bits * 25);
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}
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static unsigned int down_voltage_value(u8 bits)
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{
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return 625 + (bits * 25);
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}
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static unsigned int ldo_voltage_value(u8 bits)
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{
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bits &= 0x1f;
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return 900 + (bits * 100);
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}
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static int pcf50633_regulator_map_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct pcf50633 *pcf;
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int regulator_id, millivolts;
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u8 volt_bits;
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pcf = rdev_get_drvdata(rdev);
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regulator_id = rdev_get_id(rdev);
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if (regulator_id >= PCF50633_NUM_REGULATORS)
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return -EINVAL;
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millivolts = min_uV / 1000;
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switch (regulator_id) {
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case PCF50633_REGULATOR_AUTO:
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volt_bits = auto_voltage_bits(millivolts);
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break;
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case PCF50633_REGULATOR_DOWN1:
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case PCF50633_REGULATOR_DOWN2:
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volt_bits = down_voltage_bits(millivolts);
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break;
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case PCF50633_REGULATOR_LDO1:
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case PCF50633_REGULATOR_LDO2:
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case PCF50633_REGULATOR_LDO3:
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case PCF50633_REGULATOR_LDO4:
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case PCF50633_REGULATOR_LDO5:
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case PCF50633_REGULATOR_LDO6:
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case PCF50633_REGULATOR_HCLDO:
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case PCF50633_REGULATOR_MEMLDO:
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volt_bits = ldo_voltage_bits(millivolts);
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break;
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default:
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return -EINVAL;
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}
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return volt_bits;
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}
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static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
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unsigned int index)
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{
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int regulator_id = rdev_get_id(rdev);
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int millivolts;
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switch (regulator_id) {
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case PCF50633_REGULATOR_AUTO:
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millivolts = auto_voltage_value(index);
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break;
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case PCF50633_REGULATOR_DOWN1:
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case PCF50633_REGULATOR_DOWN2:
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millivolts = down_voltage_value(index);
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break;
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case PCF50633_REGULATOR_LDO1:
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case PCF50633_REGULATOR_LDO2:
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case PCF50633_REGULATOR_LDO3:
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case PCF50633_REGULATOR_LDO4:
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case PCF50633_REGULATOR_LDO5:
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case PCF50633_REGULATOR_LDO6:
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case PCF50633_REGULATOR_HCLDO:
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case PCF50633_REGULATOR_MEMLDO:
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millivolts = ldo_voltage_value(index);
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break;
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default:
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return -EINVAL;
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}
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return millivolts * 1000;
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}
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static struct regulator_ops pcf50633_regulator_ops = {
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = pcf50633_regulator_list_voltage,
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.map_voltage = pcf50633_regulator_map_voltage,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static const struct regulator_desc regulators[] = {
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[PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128),
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[PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96),
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[PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96),
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[PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28),
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[PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28),
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[PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28),
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[PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28),
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[PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28),
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[PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28),
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[PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28),
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[PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28),
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};
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static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
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{
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struct regulator_dev *rdev;
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struct pcf50633 *pcf;
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struct regulator_config config = { };
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/* Already set by core driver */
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pcf = dev_to_pcf50633(pdev->dev.parent);
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config.dev = &pdev->dev;
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config.init_data = pdev->dev.platform_data;
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config.driver_data = pcf;
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config.regmap = pcf->regmap;
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rdev = regulator_register(®ulators[pdev->id], &config);
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if (IS_ERR(rdev))
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return PTR_ERR(rdev);
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platform_set_drvdata(pdev, rdev);
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if (pcf->pdata->regulator_registered)
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pcf->pdata->regulator_registered(pcf, pdev->id);
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return 0;
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}
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static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
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{
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struct regulator_dev *rdev = platform_get_drvdata(pdev);
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platform_set_drvdata(pdev, NULL);
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regulator_unregister(rdev);
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return 0;
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}
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static struct platform_driver pcf50633_regulator_driver = {
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.driver = {
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.name = "pcf50633-regltr",
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},
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.probe = pcf50633_regulator_probe,
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.remove = pcf50633_regulator_remove,
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};
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static int __init pcf50633_regulator_init(void)
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{
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return platform_driver_register(&pcf50633_regulator_driver);
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}
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subsys_initcall(pcf50633_regulator_init);
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static void __exit pcf50633_regulator_exit(void)
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{
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platform_driver_unregister(&pcf50633_regulator_driver);
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}
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module_exit(pcf50633_regulator_exit);
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MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
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MODULE_DESCRIPTION("PCF50633 regulator driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pcf50633-regulator");
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