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Release 4.11 drivers/power/supply/wm97xx_battery.c

/*
 * Battery measurement code for WM97xx
 *
 * based on tosa_battery.c
 *
 * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/wm97xx.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/slab.h>


static struct work_struct bat_work;
static DEFINE_MUTEX(work_lock);

static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;

static enum power_supply_property *prop;


static unsigned long wm97xx_read_bat(struct power_supply *bat_ps) { struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps); return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent), pdata->batt_aux) * pdata->batt_mult / pdata->batt_div; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut3982.98%350.00%
Robert Jarzmik48.51%116.67%
Alexander Beregalov36.38%116.67%
Krzysztof Kozlowski12.13%116.67%
Total47100.00%6100.00%


static unsigned long wm97xx_read_temp(struct power_supply *bat_ps) { struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps); return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent), pdata->temp_aux) * pdata->temp_mult / pdata->temp_div; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut3982.98%350.00%
Robert Jarzmik48.51%116.67%
Alexander Beregalov36.38%116.67%
Krzysztof Kozlowski12.13%116.67%
Total47100.00%6100.00%


static int wm97xx_bat_get_property(struct power_supply *bat_ps, enum power_supply_property psp, union power_supply_propval *val) { struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps); switch (psp) { case POWER_SUPPLY_PROP_STATUS: val->intval = bat_status; break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = pdata->batt_tech; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: if (pdata->batt_aux >= 0) val->intval = wm97xx_read_bat(bat_ps); else return -EINVAL; break; case POWER_SUPPLY_PROP_TEMP: if (pdata->temp_aux >= 0) val->intval = wm97xx_read_temp(bat_ps); else return -EINVAL; break; case POWER_SUPPLY_PROP_VOLTAGE_MAX: if (pdata->max_voltage >= 0) val->intval = pdata->max_voltage; else return -EINVAL; break; case POWER_SUPPLY_PROP_VOLTAGE_MIN: if (pdata->min_voltage >= 0) val->intval = pdata->min_voltage; else return -EINVAL; break; case POWER_SUPPLY_PROP_PRESENT: val->intval = 1; break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut17497.75%375.00%
Robert Jarzmik42.25%125.00%
Total178100.00%4100.00%


static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps) { schedule_work(&bat_work); }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut17100.00%2100.00%
Total17100.00%2100.00%


static void wm97xx_bat_update(struct power_supply *bat_ps) { int old_status = bat_status; struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps); mutex_lock(&work_lock); bat_status = (pdata->charge_gpio >= 0) ? (gpio_get_value(pdata->charge_gpio) ? POWER_SUPPLY_STATUS_DISCHARGING : POWER_SUPPLY_STATUS_CHARGING) : POWER_SUPPLY_STATUS_UNKNOWN; if (old_status != bat_status) { pr_debug("%s: %i -> %i\n", bat_ps->desc->name, old_status, bat_status); power_supply_changed(bat_ps); } mutex_unlock(&work_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut8593.41%360.00%
Robert Jarzmik44.40%120.00%
Krzysztof Kozlowski22.20%120.00%
Total91100.00%5100.00%

static struct power_supply *bat_psy; static struct power_supply_desc bat_psy_desc = { .type = POWER_SUPPLY_TYPE_BATTERY, .get_property = wm97xx_bat_get_property, .external_power_changed = wm97xx_bat_external_power_changed, .use_for_apm = 1, };
static void wm97xx_bat_work(struct work_struct *work) { wm97xx_bat_update(bat_psy); }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut1593.75%266.67%
Krzysztof Kozlowski16.25%133.33%
Total16100.00%3100.00%


static irqreturn_t wm97xx_chrg_irq(int irq, void *data) { schedule_work(&bat_work); return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut22100.00%1100.00%
Total22100.00%1100.00%

#ifdef CONFIG_PM
static int wm97xx_bat_suspend(struct device *dev) { flush_work(&bat_work); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut1575.00%360.00%
Tejun Heo525.00%240.00%
Total20100.00%5100.00%


static int wm97xx_bat_resume(struct device *dev) { schedule_work(&bat_work); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut20100.00%3100.00%
Total20100.00%3100.00%

static const struct dev_pm_ops wm97xx_bat_pm_ops = { .suspend = wm97xx_bat_suspend, .resume = wm97xx_bat_resume, }; #endif
static int wm97xx_bat_probe(struct platform_device *dev) { int ret = 0; int props = 1; /* POWER_SUPPLY_PROP_PRESENT */ int i = 0; struct wm97xx_batt_pdata *pdata = dev->dev.platform_data; struct power_supply_config cfg = {}; if (!pdata) { dev_err(&dev->dev, "No platform data supplied\n"); return -EINVAL; } cfg.drv_data = pdata; if (dev->id != -1) return -EINVAL; if (gpio_is_valid(pdata->charge_gpio)) { ret = gpio_request(pdata->charge_gpio, "BATT CHRG"); if (ret) goto err; ret = gpio_direction_input(pdata->charge_gpio); if (ret) goto err2; ret = request_irq(gpio_to_irq(pdata->charge_gpio), wm97xx_chrg_irq, 0, "AC Detect", dev); if (ret) goto err2; props++; /* POWER_SUPPLY_PROP_STATUS */ } if (pdata->batt_tech >= 0) props++; /* POWER_SUPPLY_PROP_TECHNOLOGY */ if (pdata->temp_aux >= 0) props++; /* POWER_SUPPLY_PROP_TEMP */ if (pdata->batt_aux >= 0) props++; /* POWER_SUPPLY_PROP_VOLTAGE_NOW */ if (pdata->max_voltage >= 0) props++; /* POWER_SUPPLY_PROP_VOLTAGE_MAX */ if (pdata->min_voltage >= 0) props++; /* POWER_SUPPLY_PROP_VOLTAGE_MIN */ prop = kzalloc(props * sizeof(*prop), GFP_KERNEL); if (!prop) { ret = -ENOMEM; goto err3; } prop[i++] = POWER_SUPPLY_PROP_PRESENT; if (pdata->charge_gpio >= 0) prop[i++] = POWER_SUPPLY_PROP_STATUS; if (pdata->batt_tech >= 0) prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY; if (pdata->temp_aux >= 0) prop[i++] = POWER_SUPPLY_PROP_TEMP; if (pdata->batt_aux >= 0) prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW; if (pdata->max_voltage >= 0) prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX; if (pdata->min_voltage >= 0) prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN; INIT_WORK(&bat_work, wm97xx_bat_work); if (!pdata->batt_name) { dev_info(&dev->dev, "Please consider setting proper battery " "name in platform definition file, falling " "back to name \"wm97xx-batt\"\n"); bat_psy_desc.name = "wm97xx-batt"; } else bat_psy_desc.name = pdata->batt_name; bat_psy_desc.properties = prop; bat_psy_desc.num_properties = props; bat_psy = power_supply_register(&dev->dev, &bat_psy_desc, &cfg); if (!IS_ERR(bat_psy)) { schedule_work(&bat_work); } else { ret = PTR_ERR(bat_psy); goto err4; } return 0; err4: kfree(prop); err3: if (gpio_is_valid(pdata->charge_gpio)) free_irq(gpio_to_irq(pdata->charge_gpio), dev); err2: if (gpio_is_valid(pdata->charge_gpio)) gpio_free(pdata->charge_gpio); err: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut44987.87%436.36%
Krzysztof Kozlowski224.31%218.18%
Mark Brown193.72%218.18%
Robert Jarzmik132.54%19.09%
Julia Lawall71.37%19.09%
Yong Zhang10.20%19.09%
Total511100.00%11100.00%


static int wm97xx_bat_remove(struct platform_device *dev) { struct wm97xx_batt_pdata *pdata = dev->dev.platform_data; if (pdata && gpio_is_valid(pdata->charge_gpio)) { free_irq(gpio_to_irq(pdata->charge_gpio), dev); gpio_free(pdata->charge_gpio); } cancel_work_sync(&bat_work); power_supply_unregister(bat_psy); kfree(prop); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut6589.04%457.14%
Tejun Heo56.85%114.29%
Robert Jarzmik22.74%114.29%
Krzysztof Kozlowski11.37%114.29%
Total73100.00%7100.00%

static struct platform_driver wm97xx_bat_driver = { .driver = { .name = "wm97xx-battery", #ifdef CONFIG_PM .pm = &wm97xx_bat_pm_ops, #endif }, .probe = wm97xx_bat_probe, .remove = wm97xx_bat_remove, }; module_platform_driver(wm97xx_bat_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); MODULE_DESCRIPTION("WM97xx battery driver");

Overall Contributors

PersonTokensPropCommitsCommitProp
Marek Vašut109390.03%525.00%
Krzysztof Kozlowski352.88%210.00%
Robert Jarzmik312.55%15.00%
Mark Brown201.65%210.00%
Tejun Heo131.07%315.00%
Julia Lawall70.58%15.00%
Alexander Beregalov60.49%15.00%
Axel Lin60.49%210.00%
Yong Zhang10.08%15.00%
Alexey Dobriyan10.08%15.00%
Sebastian Reichel10.08%15.00%
Total1214100.00%20100.00%
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