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Changes from V1: - Removed support for suspend_enable & suspend_disable functions. Signed-off-by: Balaji Rao <balajirrao@openmoko.org> Cc: Andy Green <andy@openmoko.com> Cc: Liam Girdwood <lrg@slimlogic.co.uk> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
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Balaji Rao
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Jan 11, 2009
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,329 @@ | ||
| /* 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);; | ||
|
|
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| 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); | ||
|
|
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| 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); | ||
|
|
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| regulator_unregister(rdev); | ||
|
|
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| return 0; | ||
| } | ||
|
|
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| 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"); |
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