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Release 4.11 drivers/power/supply/pcf50633-charger.c

/* NXP PCF50633 Main Battery Charger 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, 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/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>

#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/mbc.h>


struct pcf50633_mbc {
	
struct pcf50633 *pcf;

	
int adapter_online;
	
int usb_online;

	
struct power_supply *usb;
	
struct power_supply *adapter;
	
struct power_supply *ac;
};


int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma) { struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev); int ret = 0; u8 bits; int charging_start = 1; u8 mbcs2, chgmod; unsigned int mbcc5; if (ma >= 1000) { bits = PCF50633_MBCC7_USB_1000mA; ma = 1000; } else if (ma >= 500) { bits = PCF50633_MBCC7_USB_500mA; ma = 500; } else if (ma >= 100) { bits = PCF50633_MBCC7_USB_100mA; ma = 100; } else { bits = PCF50633_MBCC7_USB_SUSPEND; charging_start = 0; ma = 0; } ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7, PCF50633_MBCC7_USB_MASK, bits); if (ret) dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma); else dev_info(pcf->dev, "usb curlim to %d mA\n", ma); /* * We limit the charging current to be the USB current limit. * The reason is that on pcf50633, when it enters PMU Standby mode, * which it does when the device goes "off", the USB current limit * reverts to the variant default. In at least one common case, that * default is 500mA. By setting the charging current to be the same * as the USB limit we set here before PMU standby, we enforce it only * using the correct amount of current even when the USB current limit * gets reset to the wrong thing */ if (mbc->pcf->pdata->charger_reference_current_ma) { mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma; if (mbcc5 > 255) mbcc5 = 255; pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5); } mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2); chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK); /* If chgmod == BATFULL, setting chgena has no effect. * Datasheet says we need to set resume instead but when autoresume is * used resume doesn't work. Clear and set chgena instead. */ if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL) pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA); else { pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA); pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA); } power_supply_changed(mbc->usb); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao25694.12%360.00%
Paul Fertser165.88%240.00%
Total272100.00%5100.00%

EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
int pcf50633_mbc_get_status(struct pcf50633 *pcf) { struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev); int status = 0; u8 chgmod; if (!mbc) return 0; chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2) & PCF50633_MBCS2_MBC_MASK; if (mbc->usb_online) status |= PCF50633_MBC_USB_ONLINE; if (chgmod == PCF50633_MBCS2_MBC_USB_PRE || chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT || chgmod == PCF50633_MBCS2_MBC_USB_FAST || chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT) status |= PCF50633_MBC_USB_ACTIVE; if (mbc->adapter_online) status |= PCF50633_MBC_ADAPTER_ONLINE; if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE || chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT || chgmod == PCF50633_MBCS2_MBC_ADP_FAST || chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT) status |= PCF50633_MBC_ADAPTER_ACTIVE; return status; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao6454.24%150.00%
Paul Fertser5445.76%150.00%
Total118100.00%2100.00%

EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf) { struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev); if (!mbc) return 0; return mbc->usb_online; }

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PersonTokensPropCommitsCommitProp
Paul Fertser35100.00%1100.00%
Total35100.00%1100.00%

EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);
static ssize_t show_chgmode(struct device *dev, struct device_attribute *attr, char *buf) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2); u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK); return sprintf(buf, "%d\n", chgmod); }

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PersonTokensPropCommitsCommitProp
Balaji Rao61100.00%1100.00%
Total61100.00%1100.00%

static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
static ssize_t show_usblim(struct device *dev, struct device_attribute *attr, char *buf) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) & PCF50633_MBCC7_USB_MASK; unsigned int ma; if (usblim == PCF50633_MBCC7_USB_1000mA) ma = 1000; else if (usblim == PCF50633_MBCC7_USB_500mA) ma = 500; else if (usblim == PCF50633_MBCC7_USB_100mA) ma = 100; else ma = 0; return sprintf(buf, "%u\n", ma); }

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PersonTokensPropCommitsCommitProp
Balaji Rao95100.00%1100.00%
Total95100.00%1100.00%


static ssize_t set_usblim(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); unsigned long ma; int ret; ret = kstrtoul(buf, 10, &ma); if (ret) return ret; pcf50633_mbc_usb_curlim_set(mbc->pcf, ma); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao7097.22%150.00%
Jingoo Han22.78%150.00%
Total72100.00%2100.00%

static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
static ssize_t show_chglim(struct device *dev, struct device_attribute *attr, char *buf) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5); unsigned int ma; if (!mbc->pcf->pdata->charger_reference_current_ma) return -ENODEV; ma = (mbc->pcf->pdata->charger_reference_current_ma * mbcc5) >> 8; return sprintf(buf, "%u\n", ma); }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao87100.00%2100.00%
Total87100.00%2100.00%


static ssize_t set_chglim(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); unsigned long ma; unsigned int mbcc5; int ret; if (!mbc->pcf->pdata->charger_reference_current_ma) return -ENODEV; ret = kstrtoul(buf, 10, &ma); if (ret) return ret; mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma; if (mbcc5 > 255) mbcc5 = 255; pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao11798.32%375.00%
Jingoo Han21.68%125.00%
Total119100.00%4100.00%

/* * This attribute allows to change MBC charging limit on the fly * independently of usb current limit. It also gets set automatically every * time usb current limit is changed. */ static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim); static struct attribute *pcf50633_mbc_sysfs_entries[] = { &dev_attr_chgmode.attr, &dev_attr_usb_curlim.attr, &dev_attr_chg_curlim.attr, NULL, }; static struct attribute_group mbc_attr_group = { .name = NULL, /* put in device directory */ .attrs = pcf50633_mbc_sysfs_entries, };
static void pcf50633_mbc_irq_handler(int irq, void *data) { struct pcf50633_mbc *mbc = data; /* USB */ if (irq == PCF50633_IRQ_USBINS) { mbc->usb_online = 1; } else if (irq == PCF50633_IRQ_USBREM) { mbc->usb_online = 0; pcf50633_mbc_usb_curlim_set(mbc->pcf, 0); } /* Adapter */ if (irq == PCF50633_IRQ_ADPINS) mbc->adapter_online = 1; else if (irq == PCF50633_IRQ_ADPREM) mbc->adapter_online = 0; power_supply_changed(mbc->ac); power_supply_changed(mbc->usb); power_supply_changed(mbc->adapter); if (mbc->pcf->pdata->mbc_event_callback) mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq); }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao12998.47%266.67%
Sean McNeil21.53%133.33%
Total131100.00%3100.00%


static int adapter_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy); int ret = 0; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = mbc->adapter_online; break; default: ret = -EINVAL; break; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao6298.41%150.00%
Krzysztof Kozlowski11.59%150.00%
Total63100.00%2100.00%


static int usb_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy); int ret = 0; u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) & PCF50633_MBCC7_USB_MASK; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = mbc->usb_online && (usblim <= PCF50633_MBCC7_USB_500mA); break; default: ret = -EINVAL; break; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao4857.83%133.33%
Sean McNeil3440.96%133.33%
Krzysztof Kozlowski11.20%133.33%
Total83100.00%3100.00%


static int ac_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy); int ret = 0; u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) & PCF50633_MBCC7_USB_MASK; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = mbc->usb_online && (usblim == PCF50633_MBCC7_USB_1000mA); break; default: ret = -EINVAL; break; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Sean McNeil5363.86%133.33%
Balaji Rao2934.94%133.33%
Krzysztof Kozlowski11.20%133.33%
Total83100.00%3100.00%

static enum power_supply_property power_props[] = { POWER_SUPPLY_PROP_ONLINE, }; static const u8 mbc_irq_handlers[] = { PCF50633_IRQ_ADPINS, PCF50633_IRQ_ADPREM, PCF50633_IRQ_USBINS, PCF50633_IRQ_USBREM, PCF50633_IRQ_BATFULL, PCF50633_IRQ_CHGHALT, PCF50633_IRQ_THLIMON, PCF50633_IRQ_THLIMOFF, PCF50633_IRQ_USBLIMON, PCF50633_IRQ_USBLIMOFF, PCF50633_IRQ_LOWSYS, PCF50633_IRQ_LOWBAT, }; static const struct power_supply_desc pcf50633_mbc_adapter_desc = { .name = "adapter", .type = POWER_SUPPLY_TYPE_MAINS, .properties = power_props, .num_properties = ARRAY_SIZE(power_props), .get_property = &adapter_get_property, }; static const struct power_supply_desc pcf50633_mbc_usb_desc = { .name = "usb", .type = POWER_SUPPLY_TYPE_USB, .properties = power_props, .num_properties = ARRAY_SIZE(power_props), .get_property = usb_get_property, }; static const struct power_supply_desc pcf50633_mbc_ac_desc = { .name = "ac", .type = POWER_SUPPLY_TYPE_MAINS, .properties = power_props, .num_properties = ARRAY_SIZE(power_props), .get_property = ac_get_property, };
static int pcf50633_mbc_probe(struct platform_device *pdev) { struct power_supply_config psy_cfg = {}; struct pcf50633_mbc *mbc; int i; u8 mbcs1; mbc = devm_kzalloc(&pdev->dev, sizeof(*mbc), GFP_KERNEL); if (!mbc) return -ENOMEM; platform_set_drvdata(pdev, mbc); mbc->pcf = dev_to_pcf50633(pdev->dev.parent); /* Set up IRQ handlers */ for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++) pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i], pcf50633_mbc_irq_handler, mbc); psy_cfg.supplied_to = mbc->pcf->pdata->batteries; psy_cfg.num_supplicants = mbc->pcf->pdata->num_batteries; psy_cfg.drv_data = mbc; /* Create power supplies */ mbc->adapter = power_supply_register(&pdev->dev, &pcf50633_mbc_adapter_desc, &psy_cfg); if (IS_ERR(mbc->adapter)) { dev_err(mbc->pcf->dev, "failed to register adapter\n"); return PTR_ERR(mbc->adapter); } mbc->usb = power_supply_register(&pdev->dev, &pcf50633_mbc_usb_desc, &psy_cfg); if (IS_ERR(mbc->usb)) { dev_err(mbc->pcf->dev, "failed to register usb\n"); power_supply_unregister(mbc->adapter); return PTR_ERR(mbc->usb); } mbc->ac = power_supply_register(&pdev->dev, &pcf50633_mbc_ac_desc, &psy_cfg); if (IS_ERR(mbc->ac)) { dev_err(mbc->pcf->dev, "failed to register ac\n"); power_supply_unregister(mbc->adapter); power_supply_unregister(mbc->usb); return PTR_ERR(mbc->ac); } if (sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group)) dev_err(mbc->pcf->dev, "failed to create sysfs entries\n"); mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1); if (mbcs1 & PCF50633_MBCS1_USBPRES) pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc); if (mbcs1 & PCF50633_MBCS1_ADAPTPRES) pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao22861.62%225.00%
Krzysztof Kozlowski8723.51%225.00%
Sean McNeil3710.00%112.50%
Lars-Peter Clausen71.89%112.50%
Jingoo Han61.62%112.50%
Gustavo A. R. Silva51.35%112.50%
Total370100.00%8100.00%


static int pcf50633_mbc_remove(struct platform_device *pdev) { struct pcf50633_mbc *mbc = platform_get_drvdata(pdev); int i; /* Remove IRQ handlers */ for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++) pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]); sysfs_remove_group(&pdev->dev.kobj, &mbc_attr_group); power_supply_unregister(mbc->usb); power_supply_unregister(mbc->adapter); power_supply_unregister(mbc->ac); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao7583.33%250.00%
Axel Lin1314.44%125.00%
Sean McNeil22.22%125.00%
Total90100.00%4100.00%

static struct platform_driver pcf50633_mbc_driver = { .driver = { .name = "pcf50633-mbc", }, .probe = pcf50633_mbc_probe, .remove = pcf50633_mbc_remove, }; module_platform_driver(pcf50633_mbc_driver); MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); MODULE_DESCRIPTION("PCF50633 mbc driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pcf50633-mbc");

Overall Contributors

PersonTokensPropCommitsCommitProp
Balaji Rao156676.50%320.00%
Krzysztof Kozlowski2029.87%213.33%
Sean McNeil1306.35%16.67%
Paul Fertser1105.37%213.33%
Axel Lin140.68%213.33%
Jingoo Han100.49%213.33%
Lars-Peter Clausen70.34%16.67%
Gustavo A. R. Silva50.24%16.67%
Tejun Heo30.15%16.67%
Total2047100.00%15100.00%
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