--- /dev/null
+Linux power supply class
+========================
+
+Synopsis
+~~~~~~~~
+Power supply class used to represent battery, UPS, AC or DC power supply
+properties to user-space.
+
+It defines core set of attributes, which should be applicable to (almost)
+every power supply out there. Attributes are available via sysfs and uevent
+interfaces.
+
+Each attribute has well defined meaning, up to unit of measure used. While
+the attributes provided are believed to be universally applicable to any
+power supply, specific monitoring hardware may not be able to provide them
+all, so any of them may be skipped.
+
+Power supply class is extensible, and allows to define drivers own attributes.
+The core attribute set is subject to the standard Linux evolution (i.e.
+if it will be found that some attribute is applicable to many power supply
+types or their drivers, it can be added to the core set).
+
+It also integrates with LED framework, for the purpose of providing
+typically expected feedback of battery charging/fully charged status and
+AC/USB power supply online status. (Note that specific details of the
+indication (including whether to use it at all) are fully controllable by
+user and/or specific machine defaults, per design principles of LED
+framework).
+
+
+Attributes/properties
+~~~~~~~~~~~~~~~~~~~~~
+Power supply class has predefined set of attributes, this eliminates code
+duplication across drivers. Power supply class insist on reusing its
+predefined attributes *and* their units.
+
+So, userspace gets predictable set of attributes and their units for any
+kind of power supply, and can process/present them to a user in consistent
+manner. Results for different power supplies and machines are also directly
+comparable.
+
+See drivers/power/ds2760_battery.c and drivers/power/pda_power.c for the
+example how to declare and handle attributes.
+
+
+Units
+~~~~~
+Quoting include/linux/power_supply.h:
+
+ All voltages, currents, charges, energies, time and temperatures in µV,
+ µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise
+ stated. It's driver's job to convert its raw values to units in which
+ this class operates.
+
+
+Attributes/properties detailed
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+~ ~ ~ ~ ~ ~ ~ Charge/Energy/Capacity - how to not confuse ~ ~ ~ ~ ~ ~ ~
+~ ~
+~ Because both "charge" (µAh) and "energy" (µWh) represents "capacity" ~
+~ of battery, this class distinguish these terms. Don't mix them! ~
+~ ~
+~ CHARGE_* attributes represents capacity in µAh only. ~
+~ ENERGY_* attributes represents capacity in µWh only. ~
+~ CAPACITY attribute represents capacity in *percents*, from 0 to 100. ~
+~ ~
+~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
+
+Postfixes:
+_AVG - *hardware* averaged value, use it if your hardware is really able to
+report averaged values.
+_NOW - momentary/instantaneous values.
+
+STATUS - this attribute represents operating status (charging, full,
+discharging (i.e. powering a load), etc.). This corresponds to
+BATTERY_STATUS_* values, as defined in battery.h.
+
+HEALTH - represents health of the battery, values corresponds to
+POWER_SUPPLY_HEALTH_*, defined in battery.h.
+
+VOLTAGE_MAX_DESIGN, VOLTAGE_MIN_DESIGN - design values for maximal and
+minimal power supply voltages. Maximal/minimal means values of voltages
+when battery considered "full"/"empty" at normal conditions. Yes, there is
+no direct relation between voltage and battery capacity, but some dumb
+batteries use voltage for very approximated calculation of capacity.
+Battery driver also can use this attribute just to inform userspace
+about maximal and minimal voltage thresholds of a given battery.
+
+CHARGE_FULL_DESIGN, CHARGE_EMPTY_DESIGN - design charge values, when
+battery considered full/empty.
+
+ENERGY_FULL_DESIGN, ENERGY_EMPTY_DESIGN - same as above but for energy.
+
+CHARGE_FULL, CHARGE_EMPTY - These attributes means "last remembered value
+of charge when battery became full/empty". It also could mean "value of
+charge when battery considered full/empty at given conditions (temperature,
+age)". I.e. these attributes represents real thresholds, not design values.
+
+ENERGY_FULL, ENERGY_EMPTY - same as above but for energy.
+
+CAPACITY - capacity in percents.
+CAPACITY_LEVEL - capacity level. This corresponds to
+POWER_SUPPLY_CAPACITY_LEVEL_*.
+
+TEMP - temperature of the power supply.
+TEMP_AMBIENT - ambient temperature.
+
+TIME_TO_EMPTY - seconds left for battery to be considered empty (i.e.
+while battery powers a load)
+TIME_TO_FULL - seconds left for battery to be considered full (i.e.
+while battery is charging)
+
+
+Battery <-> external power supply interaction
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Often power supplies are acting as supplies and supplicants at the same
+time. Batteries are good example. So, batteries usually care if they're
+externally powered or not.
+
+For that case, power supply class implements notification mechanism for
+batteries.
+
+External power supply (AC) lists supplicants (batteries) names in
+"supplied_to" struct member, and each power_supply_changed() call
+issued by external power supply will notify supplicants via
+external_power_changed callback.
+
+
+QA
+~~
+Q: Where is POWER_SUPPLY_PROP_XYZ attribute?
+A: If you cannot find attribute suitable for your driver needs, feel free
+ to add it and send patch along with your driver.
+
+ The attributes available currently are the ones currently provided by the
+ drivers written.
+
+ Good candidates to add in future: model/part#, cycle_time, manufacturer,
+ etc.
+
+
+Q: I have some very specific attribute (e.g. battery color), should I add
+ this attribute to standard ones?
+A: Most likely, no. Such attribute can be placed in the driver itself, if
+ it is useful. Of course, if the attribute in question applicable to
+ large set of batteries, provided by many drivers, and/or comes from
+ some general battery specification/standard, it may be a candidate to
+ be added to the core attribute set.
+
+
+Q: Suppose, my battery monitoring chip/firmware does not provides capacity
+ in percents, but provides charge_{now,full,empty}. Should I calculate
+ percentage capacity manually, inside the driver, and register CAPACITY
+ attribute? The same question about time_to_empty/time_to_full.
+A: Most likely, no. This class is designed to export properties which are
+ directly measurable by the specific hardware available.
+
+ Inferring not available properties using some heuristics or mathematical
+ model is not subject of work for a battery driver. Such functionality
+ should be factored out, and in fact, apm_power, the driver to serve
+ legacy APM API on top of power supply class, uses a simple heuristic of
+ approximating remaining battery capacity based on its charge, current,
+ voltage and so on. But full-fledged battery model is likely not subject
+ for kernel at all, as it would require floating point calculation to deal
+ with things like differential equations and Kalman filters. This is
+ better be handled by batteryd/libbattery, yet to be written.
source "drivers/w1/Kconfig"
+source "drivers/power/Kconfig"
+
source "drivers/hwmon/Kconfig"
source "drivers/mfd/Kconfig"
obj-$(CONFIG_RTC_LIB) += rtc/
obj-y += i2c/
obj-$(CONFIG_W1) += w1/
+obj-$(CONFIG_POWER_SUPPLY) += power/
obj-$(CONFIG_HWMON) += hwmon/
obj-$(CONFIG_PHONE) += telephony/
obj-$(CONFIG_MD) += md/
--- /dev/null
+menuconfig POWER_SUPPLY
+ tristate "Power supply class support"
+ help
+ Say Y here to enable power supply class support. This allows
+ power supply (batteries, AC, USB) monitoring by userspace
+ via sysfs and uevent (if available) and/or APM kernel interface
+ (if selected below).
+
+if POWER_SUPPLY
+
+config POWER_SUPPLY_DEBUG
+ bool "Power supply debug"
+ help
+ Say Y here to enable debugging messages for power supply class
+ and drivers.
+
+config PDA_POWER
+ tristate "Generic PDA/phone power driver"
+ help
+ Say Y here to enable generic power driver for PDAs and phones with
+ one or two external power supplies (AC/USB) connected to main and
+ backup batteries, and optional builtin charger.
+
+config APM_POWER
+ tristate "APM emulation for class batteries"
+ depends on APM_EMULATION
+ help
+ Say Y here to enable support APM status emulation using
+ battery class devices.
+
+config BATTERY_DS2760
+ tristate "DS2760 battery driver (HP iPAQ & others)"
+ select W1
+ select W1_SLAVE_DS2760
+ help
+ Say Y here to enable support for batteries with ds2760 chip.
+
+config BATTERY_PMU
+ tristate "Apple PMU battery"
+ depends on ADB_PMU
+ help
+ Say Y here to expose battery information on Apple machines
+ through the generic battery class.
+
+config BATTERY_OLPC
+ tristate "One Laptop Per Child battery"
+ depends on X86_32 && OLPC
+ help
+ Say Y to enable support for the battery on the OLPC laptop.
+
+endif # POWER_SUPPLY
--- /dev/null
+power_supply-objs := power_supply_core.o
+
+ifeq ($(CONFIG_SYSFS),y)
+power_supply-objs += power_supply_sysfs.o
+endif
+
+ifeq ($(CONFIG_LEDS_TRIGGERS),y)
+power_supply-objs += power_supply_leds.o
+endif
+
+ifeq ($(CONFIG_POWER_SUPPLY_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
+
+obj-$(CONFIG_POWER_SUPPLY) += power_supply.o
+
+obj-$(CONFIG_PDA_POWER) += pda_power.o
+obj-$(CONFIG_APM_POWER) += apm_power.o
+
+obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
+obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
+obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
--- /dev/null
+/*
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2007 Eugeny Boger <eugenyboger@dgap.mipt.ru>
+ *
+ * Author: Eugeny Boger <eugenyboger@dgap.mipt.ru>
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ */
+
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/apm-emulation.h>
+
+#define PSY_PROP(psy, prop, val) psy->get_property(psy, \
+ POWER_SUPPLY_PROP_##prop, val)
+
+#define _MPSY_PROP(prop, val) main_battery->get_property(main_battery, \
+ prop, val)
+
+#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)
+
+static struct power_supply *main_battery;
+
+static void find_main_battery(void)
+{
+ struct device *dev;
+ struct power_supply *bat, *batm;
+ union power_supply_propval full;
+ int max_charge = 0;
+
+ main_battery = NULL;
+ batm = NULL;
+ list_for_each_entry(dev, &power_supply_class->devices, node) {
+ bat = dev_get_drvdata(dev);
+ /* If none of battery devices cantains 'use_for_apm' flag,
+ choice one with maximum design charge */
+ if (!PSY_PROP(bat, CHARGE_FULL_DESIGN, &full)) {
+ if (full.intval > max_charge) {
+ batm = bat;
+ max_charge = full.intval;
+ }
+ }
+
+ if (bat->use_for_apm)
+ main_battery = bat;
+ }
+ if (!main_battery)
+ main_battery = batm;
+
+ return;
+}
+
+static int calculate_time(int status)
+{
+ union power_supply_propval charge_full, charge_empty;
+ union power_supply_propval charge, I;
+
+ if (MPSY_PROP(CHARGE_FULL, &charge_full)) {
+ /* if battery can't report this property, use design value */
+ if (MPSY_PROP(CHARGE_FULL_DESIGN, &charge_full))
+ return -1;
+ }
+
+ if (MPSY_PROP(CHARGE_EMPTY, &charge_empty)) {
+ /* if battery can't report this property, use design value */
+ if (MPSY_PROP(CHARGE_EMPTY_DESIGN, &charge_empty))
+ charge_empty.intval = 0;
+ }
+
+ if (MPSY_PROP(CHARGE_AVG, &charge)) {
+ /* if battery can't report average value, use momentary */
+ if (MPSY_PROP(CHARGE_NOW, &charge))
+ return -1;
+ }
+
+ if (MPSY_PROP(CURRENT_AVG, &I)) {
+ /* if battery can't report average value, use momentary */
+ if (MPSY_PROP(CURRENT_NOW, &I))
+ return -1;
+ }
+
+ if (status == POWER_SUPPLY_STATUS_CHARGING)
+ return ((charge.intval - charge_full.intval) * 60L) /
+ I.intval;
+ else
+ return -((charge.intval - charge_empty.intval) * 60L) /
+ I.intval;
+}
+
+static int calculate_capacity(int using_charge)
+{
+ enum power_supply_property full_prop, empty_prop;
+ enum power_supply_property full_design_prop, empty_design_prop;
+ enum power_supply_property now_prop, avg_prop;
+ union power_supply_propval empty, full, cur;
+ int ret;
+
+ if (using_charge) {
+ full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
+ empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
+ full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
+ empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
+ now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
+ avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
+ } else {
+ full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
+ empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
+ full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
+ empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
+ now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
+ avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
+ }
+
+ if (_MPSY_PROP(full_prop, &full)) {
+ /* if battery can't report this property, use design value */
+ if (_MPSY_PROP(full_design_prop, &full))
+ return -1;
+ }
+
+ if (_MPSY_PROP(avg_prop, &cur)) {
+ /* if battery can't report average value, use momentary */
+ if (_MPSY_PROP(now_prop, &cur))
+ return -1;
+ }
+
+ if (_MPSY_PROP(empty_prop, &empty)) {
+ /* if battery can't report this property, use design value */
+ if (_MPSY_PROP(empty_design_prop, &empty))
+ empty.intval = 0;
+ }
+
+ if (full.intval - empty.intval)
+ ret = ((cur.intval - empty.intval) * 100L) /
+ (full.intval - empty.intval);
+ else
+ return -1;
+
+ if (ret > 100)
+ return 100;
+ else if (ret < 0)
+ return 0;
+
+ return ret;
+}
+
+static void apm_battery_apm_get_power_status(struct apm_power_info *info)
+{
+ union power_supply_propval status;
+ union power_supply_propval capacity, time_to_full, time_to_empty;
+
+ down(&power_supply_class->sem);
+ find_main_battery();
+ if (!main_battery) {
+ up(&power_supply_class->sem);
+ return;
+ }
+
+ /* status */
+
+ if (MPSY_PROP(STATUS, &status))
+ status.intval = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ /* ac line status */
+
+ if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) ||
+ (status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) ||
+ (status.intval == POWER_SUPPLY_STATUS_FULL))
+ info->ac_line_status = APM_AC_ONLINE;
+ else
+ info->ac_line_status = APM_AC_OFFLINE;
+
+ /* battery life (i.e. capacity, in percents) */
+
+ if (MPSY_PROP(CAPACITY, &capacity) == 0) {
+ info->battery_life = capacity.intval;
+ } else {
+ /* try calculate using energy */
+ info->battery_life = calculate_capacity(0);
+ /* if failed try calculate using charge instead */
+ if (info->battery_life == -1)
+ info->battery_life = calculate_capacity(1);
+ }
+
+ /* charging status */
+
+ if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
+ info->battery_status = APM_BATTERY_STATUS_CHARGING;
+ } else {
+ if (info->battery_life > 50)
+ info->battery_status = APM_BATTERY_STATUS_HIGH;
+ else if (info->battery_life > 5)
+ info->battery_status = APM_BATTERY_STATUS_LOW;
+ else
+ info->battery_status = APM_BATTERY_STATUS_CRITICAL;
+ }
+ info->battery_flag = info->battery_status;
+
+ /* time */
+
+ info->units = APM_UNITS_MINS;
+
+ if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
+ if (MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full)) {
+ if (MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full))
+ info->time = calculate_time(status.intval);
+ else
+ info->time = time_to_full.intval / 60;
+ }
+ } else {
+ if (MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty)) {
+ if (MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty))
+ info->time = calculate_time(status.intval);
+ else
+ info->time = time_to_empty.intval / 60;
+ }
+ }
+
+ up(&power_supply_class->sem);
+ return;
+}
+
+static int __init apm_battery_init(void)
+{
+ printk(KERN_INFO "APM Battery Driver\n");
+
+ apm_get_power_status = apm_battery_apm_get_power_status;
+ return 0;
+}
+
+static void __exit apm_battery_exit(void)
+{
+ apm_get_power_status = NULL;
+ return;
+}
+
+module_init(apm_battery_init);
+module_exit(apm_battery_exit);
+
+MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>");
+MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Driver for batteries with DS2760 chips inside.
+ *
+ * Copyright © 2007 Anton Vorontsov
+ * 2004-2007 Matt Reimer
+ * 2004 Szabolcs Gyurko
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ *
+ * Author: Anton Vorontsov <cbou@mail.ru>
+ * February 2007
+ *
+ * Matt Reimer <mreimer@vpop.net>
+ * April 2004, 2005, 2007
+ *
+ * Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
+ * September 2004
+ */
+
+#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/jiffies.h>
+#include <linux/workqueue.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include "../w1/w1.h"
+#include "../w1/slaves/w1_ds2760.h"
+
+struct ds2760_device_info {
+ struct device *dev;
+
+ /* DS2760 data, valid after calling ds2760_battery_read_status() */
+ unsigned long update_time; /* jiffies when data read */
+ char raw[DS2760_DATA_SIZE]; /* raw DS2760 data */
+ int voltage_raw; /* units of 4.88 mV */
+ int voltage_uV; /* units of µV */
+ int current_raw; /* units of 0.625 mA */
+ int current_uA; /* units of µA */
+ int accum_current_raw; /* units of 0.25 mAh */
+ int accum_current_uAh; /* units of µAh */
+ int temp_raw; /* units of 0.125 °C */
+ int temp_C; /* units of 0.1 °C */
+ int rated_capacity; /* units of µAh */
+ int rem_capacity; /* percentage */
+ int full_active_uAh; /* units of µAh */
+ int empty_uAh; /* units of µAh */
+ int life_sec; /* units of seconds */
+ int charge_status; /* POWER_SUPPLY_STATUS_* */
+
+ int full_counter;
+ struct power_supply bat;
+ struct device *w1_dev;
+ struct workqueue_struct *monitor_wqueue;
+ struct delayed_work monitor_work;
+};
+
+static unsigned int cache_time = 1000;
+module_param(cache_time, uint, 0644);
+MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
+
+/* Some batteries have their rated capacity stored a N * 10 mAh, while
+ * others use an index into this table. */
+static int rated_capacities[] = {
+ 0,
+ 920, /* Samsung */
+ 920, /* BYD */
+ 920, /* Lishen */
+ 920, /* NEC */
+ 1440, /* Samsung */
+ 1440, /* BYD */
+ 1440, /* Lishen */
+ 1440, /* NEC */
+ 2880, /* Samsung */
+ 2880, /* BYD */
+ 2880, /* Lishen */
+ 2880 /* NEC */
+};
+
+/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C
+ * temp is in Celsius */
+static int battery_interpolate(int array[], int temp)
+{
+ int index, dt;
+
+ if (temp <= 0)
+ return array[0];
+ if (temp >= 40)
+ return array[4];
+
+ index = temp / 10;
+ dt = temp % 10;
+
+ return array[index] + (((array[index + 1] - array[index]) * dt) / 10);
+}
+
+static int ds2760_battery_read_status(struct ds2760_device_info *di)
+{
+ int ret, i, start, count, scale[5];
+
+ if (di->update_time && time_before(jiffies, di->update_time +
+ msecs_to_jiffies(cache_time)))
+ return 0;
+
+ /* The first time we read the entire contents of SRAM/EEPROM,
+ * but after that we just read the interesting bits that change. */
+ if (di->update_time == 0) {
+ start = 0;
+ count = DS2760_DATA_SIZE;
+ } else {
+ start = DS2760_VOLTAGE_MSB;
+ count = DS2760_TEMP_LSB - start + 1;
+ }
+
+ ret = w1_ds2760_read(di->w1_dev, di->raw + start, start, count);
+ if (ret != count) {
+ dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n",
+ di->w1_dev);
+ return 1;
+ }
+
+ di->update_time = jiffies;
+
+ /* DS2760 reports voltage in units of 4.88mV, but the battery class
+ * reports in units of uV, so convert by multiplying by 4880. */
+ di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) |
+ (di->raw[DS2760_VOLTAGE_LSB] >> 5);
+ di->voltage_uV = di->voltage_raw * 4880;
+
+ /* DS2760 reports current in signed units of 0.625mA, but the battery
+ * class reports in units of µA, so convert by multiplying by 625. */
+ di->current_raw =
+ (((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) |
+ (di->raw[DS2760_CURRENT_LSB] >> 3);
+ di->current_uA = di->current_raw * 625;
+
+ /* DS2760 reports accumulated current in signed units of 0.25mAh. */
+ di->accum_current_raw =
+ (((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) |
+ di->raw[DS2760_CURRENT_ACCUM_LSB];
+ di->accum_current_uAh = di->accum_current_raw * 250;
+
+ /* DS2760 reports temperature in signed units of 0.125°C, but the
+ * battery class reports in units of 1/10 °C, so we convert by
+ * multiplying by .125 * 10 = 1.25. */
+ di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) |
+ (di->raw[DS2760_TEMP_LSB] >> 5);
+ di->temp_C = di->temp_raw + (di->temp_raw / 4);
+
+ /* At least some battery monitors (e.g. HP iPAQ) store the battery's
+ * maximum rated capacity. */
+ if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities))
+ di->rated_capacity = rated_capacities[
+ (unsigned int)di->raw[DS2760_RATED_CAPACITY]];
+ else
+ di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10;
+
+ di->rated_capacity *= 1000; /* convert to µAh */
+
+ /* Calculate the full level at the present temperature. */
+ di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 |
+ di->raw[DS2760_ACTIVE_FULL + 1];
+
+ scale[0] = di->raw[DS2760_ACTIVE_FULL] << 8 |
+ di->raw[DS2760_ACTIVE_FULL + 1];
+ for (i = 1; i < 5; i++)
+ scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 2 + i];
+
+ di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10);
+ di->full_active_uAh *= 1000; /* convert to µAh */
+
+ /* Calculate the empty level at the present temperature. */
+ scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4];
+ for (i = 3; i >= 0; i--)
+ scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i];
+
+ di->empty_uAh = battery_interpolate(scale, di->temp_C / 10);
+ di->empty_uAh *= 1000; /* convert to µAh */
+
+ /* From Maxim Application Note 131: remaining capacity =
+ * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */
+ di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) /
+ (di->full_active_uAh - di->empty_uAh);
+
+ if (di->rem_capacity < 0)
+ di->rem_capacity = 0;
+ if (di->rem_capacity > 100)
+ di->rem_capacity = 100;
+
+ if (di->current_uA)
+ di->life_sec = -((di->accum_current_uAh - di->empty_uAh) *
+ 3600L) / di->current_uA;
+ else
+ di->life_sec = 0;
+
+ return 0;
+}
+
+static void ds2760_battery_update_status(struct ds2760_device_info *di)
+{
+ int old_charge_status = di->charge_status;
+
+ ds2760_battery_read_status(di);
+
+ if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN)
+ di->full_counter = 0;
+
+ if (power_supply_am_i_supplied(&di->bat)) {
+ if (di->current_uA > 10000) {
+ di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
+ di->full_counter = 0;
+ } else if (di->current_uA < -5000) {
+ if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING)
+ dev_notice(di->dev, "not enough power to "
+ "charge\n");
+ di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ di->full_counter = 0;
+ } else if (di->current_uA < 10000 &&
+ di->charge_status != POWER_SUPPLY_STATUS_FULL) {
+
+ /* Don't consider the battery to be full unless
+ * we've seen the current < 10 mA at least two
+ * consecutive times. */
+
+ di->full_counter++;
+
+ if (di->full_counter < 2) {
+ di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
+ } else {
+ unsigned char acr[2];
+ int acr_val;
+
+ /* acr is in units of 0.25 mAh */
+ acr_val = di->full_active_uAh * 4L / 1000;
+
+ acr[0] = acr_val >> 8;
+ acr[1] = acr_val & 0xff;
+
+ if (w1_ds2760_write(di->w1_dev, acr,
+ DS2760_CURRENT_ACCUM_MSB, 2) < 2)
+ dev_warn(di->dev,
+ "ACR reset failed\n");
+
+ di->charge_status = POWER_SUPPLY_STATUS_FULL;
+ }
+ }
+ } else {
+ di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
+ di->full_counter = 0;
+ }
+
+ if (di->charge_status != old_charge_status)
+ power_supply_changed(&di->bat);
+
+ return;
+}
+
+static void ds2760_battery_work(struct work_struct *work)
+{
+ struct ds2760_device_info *di = container_of(work,
+ struct ds2760_device_info, monitor_work.work);
+ const int interval = HZ * 60;
+
+ dev_dbg(di->dev, "%s\n", __FUNCTION__);
+
+ ds2760_battery_update_status(di);
+ queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval);
+
+ return;
+}
+
+#define to_ds2760_device_info(x) container_of((x), struct ds2760_device_info, \
+ bat);
+
+static void ds2760_battery_external_power_changed(struct power_supply *psy)
+{
+ struct ds2760_device_info *di = to_ds2760_device_info(psy);
+
+ dev_dbg(di->dev, "%s\n", __FUNCTION__);
+
+ cancel_delayed_work(&di->monitor_work);
+ queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
+
+ return;
+}
+
+static int ds2760_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct ds2760_device_info *di = to_ds2760_device_info(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = di->charge_status;
+ return 0;
+ default:
+ break;
+ }
+
+ ds2760_battery_read_status(di);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = di->voltage_uV;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ val->intval = di->current_uA;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = di->rated_capacity;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ val->intval = di->full_active_uAh;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_EMPTY:
+ val->intval = di->empty_uAh;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ val->intval = di->accum_current_uAh;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ val->intval = di->temp_C;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property ds2760_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_EMPTY,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_TEMP,
+};
+
+static int ds2760_battery_probe(struct platform_device *pdev)
+{
+ int retval = 0;
+ struct ds2760_device_info *di;
+ struct ds2760_platform_data *pdata;
+
+ di = kzalloc(sizeof(*di), GFP_KERNEL);
+ if (!di) {
+ retval = -ENOMEM;
+ goto di_alloc_failed;
+ }
+
+ platform_set_drvdata(pdev, di);
+
+ pdata = pdev->dev.platform_data;
+ di->dev = &pdev->dev;
+ di->w1_dev = pdev->dev.parent;
+ di->bat.name = pdev->dev.bus_id;
+ di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
+ di->bat.properties = ds2760_battery_props;
+ di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props);
+ di->bat.get_property = ds2760_battery_get_property;
+ di->bat.external_power_changed =
+ ds2760_battery_external_power_changed;
+
+ di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ retval = power_supply_register(&pdev->dev, &di->bat);
+ if (retval) {
+ dev_err(di->dev, "failed to register battery");
+ goto batt_failed;
+ }
+
+ INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
+ di->monitor_wqueue = create_singlethread_workqueue(pdev->dev.bus_id);
+ if (!di->monitor_wqueue) {
+ retval = -ESRCH;
+ goto workqueue_failed;
+ }
+ queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1);
+
+ goto success;
+
+workqueue_failed:
+ power_supply_unregister(&di->bat);
+batt_failed:
+ kfree(di);
+di_alloc_failed:
+success:
+ return retval;
+}
+
+static int ds2760_battery_remove(struct platform_device *pdev)
+{
+ struct ds2760_device_info *di = platform_get_drvdata(pdev);
+
+ cancel_rearming_delayed_workqueue(di->monitor_wqueue,
+ &di->monitor_work);
+ destroy_workqueue(di->monitor_wqueue);
+ power_supply_unregister(&di->bat);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int ds2760_battery_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct ds2760_device_info *di = platform_get_drvdata(pdev);
+
+ di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ return 0;
+}
+
+static int ds2760_battery_resume(struct platform_device *pdev)
+{
+ struct ds2760_device_info *di = platform_get_drvdata(pdev);
+
+ di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
+ power_supply_changed(&di->bat);
+
+ cancel_delayed_work(&di->monitor_work);
+ queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
+
+ return 0;
+}
+
+#else
+
+#define ds2760_battery_suspend NULL
+#define ds2760_battery_resume NULL
+
+#endif /* CONFIG_PM */
+
+static struct platform_driver ds2760_battery_driver = {
+ .driver = {
+ .name = "ds2760-battery",
+ },
+ .probe = ds2760_battery_probe,
+ .remove = ds2760_battery_remove,
+ .suspend = ds2760_battery_suspend,
+ .resume = ds2760_battery_resume,
+};
+
+static int __init ds2760_battery_init(void)
+{
+ return platform_driver_register(&ds2760_battery_driver);
+}
+
+static void __exit ds2760_battery_exit(void)
+{
+ platform_driver_unregister(&ds2760_battery_driver);
+ return;
+}
+
+module_init(ds2760_battery_init);
+module_exit(ds2760_battery_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, "
+ "Matt Reimer <mreimer@vpop.net>, "
+ "Anton Vorontsov <cbou@mail.ru>");
+MODULE_DESCRIPTION("ds2760 battery driver");
--- /dev/null
+/*
+ * Battery driver for One Laptop Per Child board.
+ *
+ * Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
+ *
+ * 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/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <asm/olpc.h>
+
+
+#define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */
+#define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */
+#define EC_BAT_ACR 0x12
+#define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */
+#define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */
+#define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */
+#define EC_BAT_SOC 0x16 /* uint8_t, percentage */
+#define EC_BAT_SERIAL 0x17 /* uint8_t[6] */
+#define EC_BAT_EEPROM 0x18 /* uint8_t adr as input, uint8_t output */
+#define EC_BAT_ERRCODE 0x1f /* uint8_t, bitmask */
+
+#define BAT_STAT_PRESENT 0x01
+#define BAT_STAT_FULL 0x02
+#define BAT_STAT_LOW 0x04
+#define BAT_STAT_DESTROY 0x08
+#define BAT_STAT_AC 0x10
+#define BAT_STAT_CHARGING 0x20
+#define BAT_STAT_DISCHARGING 0x40
+
+#define BAT_ERR_INFOFAIL 0x02
+#define BAT_ERR_OVERVOLTAGE 0x04
+#define BAT_ERR_OVERTEMP 0x05
+#define BAT_ERR_GAUGESTOP 0x06
+#define BAT_ERR_OUT_OF_CONTROL 0x07
+#define BAT_ERR_ID_FAIL 0x09
+#define BAT_ERR_ACR_FAIL 0x10
+
+#define BAT_ADDR_MFR_TYPE 0x5F
+
+/*********************************************************************
+ * Power
+ *********************************************************************/
+
+static int olpc_ac_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ uint8_t status;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
+ if (ret)
+ return ret;
+
+ val->intval = !!(status & BAT_STAT_AC);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static enum power_supply_property olpc_ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static struct power_supply olpc_ac = {
+ .name = "olpc-ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = olpc_ac_props,
+ .num_properties = ARRAY_SIZE(olpc_ac_props),
+ .get_property = olpc_ac_get_prop,
+};
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+static int olpc_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ int16_t ec_word;
+ uint8_t ec_byte;
+
+ ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ /* Theoretically there's a race here -- the battery could be
+ removed immediately after we check whether it's present, and
+ then we query for some other property of the now-absent battery.
+ It doesn't matter though -- the EC will return the last-known
+ information, and it's as if we just ran that _little_ bit faster
+ and managed to read it out before the battery went away. */
+ if (!(ec_byte & BAT_STAT_PRESENT) && psp != POWER_SUPPLY_PROP_PRESENT)
+ return -ENODEV;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (olpc_platform_info.ecver > 0x44) {
+ if (ec_byte & BAT_STAT_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (ec_byte & BAT_STAT_DISCHARGING)
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else /* er,... */
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ } else {
+ /* Older EC didn't report charge/discharge bits */
+ if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else /* Not _necessarily_ true but EC doesn't tell all yet */
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ }
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = !!(ec_byte & BAT_STAT_PRESENT);
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (ec_byte & BAT_STAT_DESTROY)
+ val->intval = POWER_SUPPLY_HEALTH_DEAD;
+ else {
+ ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ switch (ec_byte) {
+ case 0:
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+
+ case BAT_ERR_OVERTEMP:
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ break;
+
+ case BAT_ERR_OVERVOLTAGE:
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+
+ case BAT_ERR_INFOFAIL:
+ case BAT_ERR_OUT_OF_CONTROL:
+ case BAT_ERR_ID_FAIL:
+ case BAT_ERR_ACR_FAIL:
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+
+ default:
+ /* Eep. We don't know this failure code */
+ return -EIO;
+ }
+ }
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ switch (ec_byte >> 4) {
+ case 1:
+ val->strval = "Gold Peak";
+ break;
+ case 2:
+ val->strval = "BYD";
+ break;
+ default:
+ val->strval = "Unknown";
+ break;
+ }
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ ec_byte = BAT_ADDR_MFR_TYPE;
+ ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+ if (ret)
+ return ret;
+
+ switch (ec_byte & 0xf) {
+ case 1:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
+ break;
+ case 2:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+ break;
+ }
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ ec_word = be16_to_cpu(ec_word);
+ val->intval = ec_word * 9760L / 32;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ ec_word = be16_to_cpu(ec_word);
+ val->intval = ec_word * 15625L / 120;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
+ if (ret)
+ return ret;
+ val->intval = ec_byte;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ if (ec_byte & BAT_STAT_FULL)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else if (ec_byte & BAT_STAT_LOW)
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ else
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+ ec_word = be16_to_cpu(ec_word);
+ val->intval = ec_word * 100 / 256;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_AMBIENT:
+ ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
+ if (ret)
+ return ret;
+
+ ec_word = be16_to_cpu(ec_word);
+ val->intval = ec_word * 100 / 256;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property olpc_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_AMBIENT,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+/*********************************************************************
+ * Initialisation
+ *********************************************************************/
+
+static struct platform_device *bat_pdev;
+
+static struct power_supply olpc_bat = {
+ .properties = olpc_bat_props,
+ .num_properties = ARRAY_SIZE(olpc_bat_props),
+ .get_property = olpc_bat_get_property,
+ .use_for_apm = 1,
+};
+
+void olpc_battery_trigger_uevent(unsigned long cause)
+{
+ if (cause & EC_SCI_SRC_ACPWR)
+ kobject_uevent(&olpc_ac.dev->kobj, KOBJ_CHANGE);
+ if (cause & (EC_SCI_SRC_BATERR|EC_SCI_SRC_BATSOC|EC_SCI_SRC_BATTERY))
+ kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE);
+}
+
+static int __init olpc_bat_init(void)
+{
+ int ret = 0;
+ uint8_t status;
+
+ if (!olpc_platform_info.ecver)
+ return -ENXIO;
+ if (olpc_platform_info.ecver < 0x43) {
+ printk(KERN_NOTICE "OLPC EC version 0x%02x too old for battery driver.\n", olpc_platform_info.ecver);
+ return -ENXIO;
+ }
+
+ ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
+ if (ret)
+ return ret;
+
+ /* Ignore the status. It doesn't actually matter */
+
+ bat_pdev = platform_device_register_simple("olpc-battery", 0, NULL, 0);
+ if (IS_ERR(bat_pdev))
+ return PTR_ERR(bat_pdev);
+
+ ret = power_supply_register(&bat_pdev->dev, &olpc_ac);
+ if (ret)
+ goto ac_failed;
+
+ olpc_bat.name = bat_pdev->name;
+
+ ret = power_supply_register(&bat_pdev->dev, &olpc_bat);
+ if (ret)
+ goto battery_failed;
+
+ olpc_register_battery_callback(&olpc_battery_trigger_uevent);
+ goto success;
+
+battery_failed:
+ power_supply_unregister(&olpc_ac);
+ac_failed:
+ platform_device_unregister(bat_pdev);
+success:
+ return ret;
+}
+
+static void __exit olpc_bat_exit(void)
+{
+ olpc_deregister_battery_callback();
+ power_supply_unregister(&olpc_bat);
+ power_supply_unregister(&olpc_ac);
+ platform_device_unregister(bat_pdev);
+ return;
+}
+
+module_init(olpc_bat_init);
+module_exit(olpc_bat_exit);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine");
--- /dev/null
+/*
+ * Common power driver for PDAs and phones with one or two external
+ * power supplies (AC/USB) connected to main and backup batteries,
+ * and optional builtin charger.
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ *
+ * 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/power_supply.h>
+#include <linux/pda_power.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+
+static inline unsigned int get_irq_flags(struct resource *res)
+{
+ unsigned int flags = IRQF_DISABLED | IRQF_SHARED;
+
+ flags |= res->flags & IRQF_TRIGGER_MASK;
+
+ return flags;
+}
+
+static struct device *dev;
+static struct pda_power_pdata *pdata;
+static struct resource *ac_irq, *usb_irq;
+static struct timer_list charger_timer;
+static struct timer_list supply_timer;
+
+static int pda_power_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ if (psy->type == POWER_SUPPLY_TYPE_MAINS)
+ val->intval = pdata->is_ac_online ?
+ pdata->is_ac_online() : 0;
+ else
+ val->intval = pdata->is_usb_online ?
+ pdata->is_usb_online() : 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static enum power_supply_property pda_power_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static char *pda_power_supplied_to[] = {
+ "main-battery",
+ "backup-battery",
+};
+
+static struct power_supply pda_power_supplies[] = {
+ {
+ .name = "ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .supplied_to = pda_power_supplied_to,
+ .num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
+ .properties = pda_power_props,
+ .num_properties = ARRAY_SIZE(pda_power_props),
+ .get_property = pda_power_get_property,
+ },
+ {
+ .name = "usb",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .supplied_to = pda_power_supplied_to,
+ .num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
+ .properties = pda_power_props,
+ .num_properties = ARRAY_SIZE(pda_power_props),
+ .get_property = pda_power_get_property,
+ },
+};
+
+static void update_charger(void)
+{
+ if (!pdata->set_charge)
+ return;
+
+ if (pdata->is_ac_online && pdata->is_ac_online()) {
+ dev_dbg(dev, "charger on (AC)\n");
+ pdata->set_charge(PDA_POWER_CHARGE_AC);
+ } else if (pdata->is_usb_online && pdata->is_usb_online()) {
+ dev_dbg(dev, "charger on (USB)\n");
+ pdata->set_charge(PDA_POWER_CHARGE_USB);
+ } else {
+ dev_dbg(dev, "charger off\n");
+ pdata->set_charge(0);
+ }
+
+ return;
+}
+
+static void supply_timer_func(unsigned long irq)
+{
+ if (ac_irq && irq == ac_irq->start)
+ power_supply_changed(&pda_power_supplies[0]);
+ else if (usb_irq && irq == usb_irq->start)
+ power_supply_changed(&pda_power_supplies[1]);
+ return;
+}
+
+static void charger_timer_func(unsigned long irq)
+{
+ update_charger();
+
+ /* Okay, charger set. Now wait a bit before notifying supplicants,
+ * charge power should stabilize. */
+ supply_timer.data = irq;
+ mod_timer(&supply_timer,
+ jiffies + msecs_to_jiffies(pdata->wait_for_charger));
+ return;
+}
+
+static irqreturn_t power_changed_isr(int irq, void *unused)
+{
+ /* Wait a bit before reading ac/usb line status and setting charger,
+ * because ac/usb status readings may lag from irq. */
+ charger_timer.data = irq;
+ mod_timer(&charger_timer,
+ jiffies + msecs_to_jiffies(pdata->wait_for_status));
+ return IRQ_HANDLED;
+}
+
+static int pda_power_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ dev = &pdev->dev;
+
+ if (pdev->id != -1) {
+ dev_err(dev, "it's meaningless to register several "
+ "pda_powers; use id = -1\n");
+ ret = -EINVAL;
+ goto wrongid;
+ }
+
+ pdata = pdev->dev.platform_data;
+
+ update_charger();
+
+ if (!pdata->wait_for_status)
+ pdata->wait_for_status = 500;
+
+ if (!pdata->wait_for_charger)
+ pdata->wait_for_charger = 500;
+
+ setup_timer(&charger_timer, charger_timer_func, 0);
+ setup_timer(&supply_timer, supply_timer_func, 0);
+
+ ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
+ usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
+ if (!ac_irq && !usb_irq) {
+ dev_err(dev, "no ac/usb irq specified\n");
+ ret = -ENODEV;
+ goto noirqs;
+ }
+
+ if (pdata->supplied_to) {
+ pda_power_supplies[0].supplied_to = pdata->supplied_to;
+ pda_power_supplies[1].supplied_to = pdata->supplied_to;
+ pda_power_supplies[0].num_supplicants = pdata->num_supplicants;
+ pda_power_supplies[1].num_supplicants = pdata->num_supplicants;
+ }
+
+ ret = power_supply_register(&pdev->dev, &pda_power_supplies[0]);
+ if (ret) {
+ dev_err(dev, "failed to register %s power supply\n",
+ pda_power_supplies[0].name);
+ goto supply0_failed;
+ }
+
+ ret = power_supply_register(&pdev->dev, &pda_power_supplies[1]);
+ if (ret) {
+ dev_err(dev, "failed to register %s power supply\n",
+ pda_power_supplies[1].name);
+ goto supply1_failed;
+ }
+
+ if (ac_irq) {
+ ret = request_irq(ac_irq->start, power_changed_isr,
+ get_irq_flags(ac_irq), ac_irq->name,
+ &pda_power_supplies[0]);
+ if (ret) {
+ dev_err(dev, "request ac irq failed\n");
+ goto ac_irq_failed;
+ }
+ }
+
+ if (usb_irq) {
+ ret = request_irq(usb_irq->start, power_changed_isr,
+ get_irq_flags(usb_irq), usb_irq->name,
+ &pda_power_supplies[1]);
+ if (ret) {
+ dev_err(dev, "request usb irq failed\n");
+ goto usb_irq_failed;
+ }
+ }
+
+ goto success;
+
+usb_irq_failed:
+ if (ac_irq)
+ free_irq(ac_irq->start, &pda_power_supplies[0]);
+ac_irq_failed:
+ power_supply_unregister(&pda_power_supplies[1]);
+supply1_failed:
+ power_supply_unregister(&pda_power_supplies[0]);
+supply0_failed:
+noirqs:
+wrongid:
+success:
+ return ret;
+}
+
+static int pda_power_remove(struct platform_device *pdev)
+{
+ if (usb_irq)
+ free_irq(usb_irq->start, &pda_power_supplies[1]);
+ if (ac_irq)
+ free_irq(ac_irq->start, &pda_power_supplies[0]);
+ del_timer_sync(&charger_timer);
+ del_timer_sync(&supply_timer);
+ power_supply_unregister(&pda_power_supplies[1]);
+ power_supply_unregister(&pda_power_supplies[0]);
+ return 0;
+}
+
+static struct platform_driver pda_power_pdrv = {
+ .driver = {
+ .name = "pda-power",
+ },
+ .probe = pda_power_probe,
+ .remove = pda_power_remove,
+};
+
+static int __init pda_power_init(void)
+{
+ return platform_driver_register(&pda_power_pdrv);
+}
+
+static void __exit pda_power_exit(void)
+{
+ platform_driver_unregister(&pda_power_pdrv);
+ return;
+}
+
+module_init(pda_power_init);
+module_exit(pda_power_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
--- /dev/null
+/*
+ * Battery class driver for Apple PMU
+ *
+ * Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
+ *
+ * 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+
+static struct pmu_battery_dev {
+ struct power_supply bat;
+ struct pmu_battery_info *pbi;
+ char name[16];
+ int propval;
+} *pbats[PMU_MAX_BATTERIES];
+
+#define to_pmu_battery_dev(x) container_of(x, struct pmu_battery_dev, bat)
+
+/*********************************************************************
+ * Power
+ *********************************************************************/
+
+static int pmu_get_ac_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
+ (pmu_battery_count == 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property pmu_ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static struct power_supply pmu_ac = {
+ .name = "pmu-ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = pmu_ac_props,
+ .num_properties = ARRAY_SIZE(pmu_ac_props),
+ .get_property = pmu_get_ac_prop,
+};
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+
+static char *pmu_batt_types[] = {
+ "Smart", "Comet", "Hooper", "Unknown"
+};
+
+static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
+{
+ switch (pbi->flags & PMU_BATT_TYPE_MASK) {
+ case PMU_BATT_TYPE_SMART:
+ return pmu_batt_types[0];
+ case PMU_BATT_TYPE_COMET:
+ return pmu_batt_types[1];
+ case PMU_BATT_TYPE_HOOPER:
+ return pmu_batt_types[2];
+ default: break;
+ }
+ return pmu_batt_types[3];
+}
+
+static int pmu_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
+ struct pmu_battery_info *pbi = pbat->pbi;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (pbi->flags & PMU_BATT_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = pmu_bat_get_model_name(pbi);
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_AVG:
+ val->intval = pbi->charge * 1000; /* mWh -> µWh */
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_FULL:
+ val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ val->intval = pbi->amperage * 1000; /* mA -> µA */
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ val->intval = pbi->voltage * 1000; /* mV -> µV */
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
+ val->intval = pbi->time_remaining;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property pmu_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_ENERGY_AVG,
+ POWER_SUPPLY_PROP_ENERGY_FULL,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+};
+
+/*********************************************************************
+ * Initialisation
+ *********************************************************************/
+
+static struct platform_device *bat_pdev;
+
+static int __init pmu_bat_init(void)
+{
+ int ret;
+ int i;
+
+ bat_pdev = platform_device_register_simple("pmu-battery",
+ 0, NULL, 0);
+ if (IS_ERR(bat_pdev)) {
+ ret = PTR_ERR(bat_pdev);
+ goto pdev_register_failed;
+ }
+
+ ret = power_supply_register(&bat_pdev->dev, &pmu_ac);
+ if (ret)
+ goto ac_register_failed;
+
+ for (i = 0; i < pmu_battery_count; i++) {
+ struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
+ GFP_KERNEL);
+ if (!pbat)
+ break;
+
+ sprintf(pbat->name, "PMU battery %d", i);
+ pbat->bat.name = pbat->name;
+ pbat->bat.properties = pmu_bat_props;
+ pbat->bat.num_properties = ARRAY_SIZE(pmu_bat_props);
+ pbat->bat.get_property = pmu_bat_get_property;
+ pbat->pbi = &pmu_batteries[i];
+
+ ret = power_supply_register(&bat_pdev->dev, &pbat->bat);
+ if (ret) {
+ kfree(pbat);
+ goto battery_register_failed;
+ }
+ pbats[i] = pbat;
+ }
+
+ goto success;
+
+battery_register_failed:
+ while (i--) {
+ if (!pbats[i])
+ continue;
+ power_supply_unregister(&pbats[i]->bat);
+ kfree(pbats[i]);
+ }
+ power_supply_unregister(&pmu_ac);
+ac_register_failed:
+ platform_device_unregister(bat_pdev);
+pdev_register_failed:
+success:
+ return ret;
+}
+
+static void __exit pmu_bat_exit(void)
+{
+ int i;
+
+ for (i = 0; i < PMU_MAX_BATTERIES; i++) {
+ if (!pbats[i])
+ continue;
+ power_supply_unregister(&pbats[i]->bat);
+ kfree(pbats[i]);
+ }
+ power_supply_unregister(&pmu_ac);
+ platform_device_unregister(bat_pdev);
+
+ return;
+}
+
+module_init(pmu_bat_init);
+module_exit(pmu_bat_exit);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PMU battery driver");
--- /dev/null
+/*
+ * Functions private to power supply class
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ *
+ * You may use this code as per GPL version 2
+ */
+
+#ifdef CONFIG_SYSFS
+
+extern int power_supply_create_attrs(struct power_supply *psy);
+extern void power_supply_remove_attrs(struct power_supply *psy);
+extern int power_supply_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size);
+
+#else
+
+static inline int power_supply_create_attrs(struct power_supply *psy)
+{ return 0; }
+static inline void power_supply_remove_attrs(struct power_supply *psy) {}
+#define power_supply_uevent NULL
+
+#endif /* CONFIG_SYSFS */
+
+#ifdef CONFIG_LEDS_TRIGGERS
+
+extern void power_supply_update_leds(struct power_supply *psy);
+extern int power_supply_create_triggers(struct power_supply *psy);
+extern void power_supply_remove_triggers(struct power_supply *psy);
+
+#else
+
+static inline void power_supply_update_leds(struct power_supply *psy) {}
+static inline int power_supply_create_triggers(struct power_supply *psy)
+{ return 0; }
+static inline void power_supply_remove_triggers(struct power_supply *psy) {}
+
+#endif /* CONFIG_LEDS_TRIGGERS */
--- /dev/null
+/*
+ * Universal power supply monitor class
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ *
+ * You may use this code as per GPL version 2
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include "power_supply.h"
+
+struct class *power_supply_class;
+
+static void power_supply_changed_work(struct work_struct *work)
+{
+ struct power_supply *psy = container_of(work, struct power_supply,
+ changed_work);
+ int i;
+
+ dev_dbg(psy->dev, "%s\n", __FUNCTION__);
+
+ for (i = 0; i < psy->num_supplicants; i++) {
+ struct device *dev;
+
+ down(&power_supply_class->sem);
+ list_for_each_entry(dev, &power_supply_class->devices, node) {
+ struct power_supply *pst = dev_get_drvdata(dev);
+
+ if (!strcmp(psy->supplied_to[i], pst->name)) {
+ if (pst->external_power_changed)
+ pst->external_power_changed(pst);
+ }
+ }
+ up(&power_supply_class->sem);
+ }
+
+ power_supply_update_leds(psy);
+
+ kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE);
+
+ return;
+}
+
+void power_supply_changed(struct power_supply *psy)
+{
+ dev_dbg(psy->dev, "%s\n", __FUNCTION__);
+
+ schedule_work(&psy->changed_work);
+
+ return;
+}
+
+int power_supply_am_i_supplied(struct power_supply *psy)
+{
+ union power_supply_propval ret = {0,};
+ struct device *dev;
+
+ down(&power_supply_class->sem);
+ list_for_each_entry(dev, &power_supply_class->devices, node) {
+ struct power_supply *epsy = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < epsy->num_supplicants; i++) {
+ if (!strcmp(epsy->supplied_to[i], psy->name)) {
+ if (epsy->get_property(epsy,
+ POWER_SUPPLY_PROP_ONLINE, &ret))
+ continue;
+ if (ret.intval)
+ goto out;
+ }
+ }
+ }
+out:
+ up(&power_supply_class->sem);
+
+ dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, ret.intval);
+
+ return ret.intval;
+}
+
+int power_supply_register(struct device *parent, struct power_supply *psy)
+{
+ int rc = 0;
+
+ psy->dev = device_create(power_supply_class, parent, 0,
+ "%s", psy->name);
+ if (IS_ERR(psy->dev)) {
+ rc = PTR_ERR(psy->dev);
+ goto dev_create_failed;
+ }
+
+ dev_set_drvdata(psy->dev, psy);
+
+ INIT_WORK(&psy->changed_work, power_supply_changed_work);
+
+ rc = power_supply_create_attrs(psy);
+ if (rc)
+ goto create_attrs_failed;
+
+ rc = power_supply_create_triggers(psy);
+ if (rc)
+ goto create_triggers_failed;
+
+ power_supply_changed(psy);
+
+ goto success;
+
+create_triggers_failed:
+ power_supply_remove_attrs(psy);
+create_attrs_failed:
+ device_unregister(psy->dev);
+dev_create_failed:
+success:
+ return rc;
+}
+
+void power_supply_unregister(struct power_supply *psy)
+{
+ flush_scheduled_work();
+ power_supply_remove_triggers(psy);
+ power_supply_remove_attrs(psy);
+ device_unregister(psy->dev);
+ return;
+}
+
+static int __init power_supply_class_init(void)
+{
+ power_supply_class = class_create(THIS_MODULE, "power_supply");
+
+ if (IS_ERR(power_supply_class))
+ return PTR_ERR(power_supply_class);
+
+ power_supply_class->dev_uevent = power_supply_uevent;
+
+ return 0;
+}
+
+static void __exit power_supply_class_exit(void)
+{
+ class_destroy(power_supply_class);
+ return;
+}
+
+EXPORT_SYMBOL_GPL(power_supply_changed);
+EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);
+EXPORT_SYMBOL_GPL(power_supply_register);
+EXPORT_SYMBOL_GPL(power_supply_unregister);
+
+/* exported for the APM Power driver, APM emulation */
+EXPORT_SYMBOL_GPL(power_supply_class);
+
+subsys_initcall(power_supply_class_init);
+module_exit(power_supply_class_exit);
+
+MODULE_DESCRIPTION("Universal power supply monitor class");
+MODULE_AUTHOR("Ian Molton <spyro@f2s.com>, "
+ "Szabolcs Gyurko, "
+ "Anton Vorontsov <cbou@mail.ru>");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * LEDs triggers for power supply class
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ *
+ * You may use this code as per GPL version 2
+ */
+
+#include <linux/power_supply.h>
+
+/* Battery specific LEDs triggers. */
+
+static void power_supply_update_bat_leds(struct power_supply *psy)
+{
+ union power_supply_propval status;
+
+ if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
+ return;
+
+ dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, status.intval);
+
+ switch (status.intval) {
+ case POWER_SUPPLY_STATUS_FULL:
+ led_trigger_event(psy->charging_full_trig, LED_FULL);
+ led_trigger_event(psy->charging_trig, LED_OFF);
+ led_trigger_event(psy->full_trig, LED_FULL);
+ break;
+ case POWER_SUPPLY_STATUS_CHARGING:
+ led_trigger_event(psy->charging_full_trig, LED_FULL);
+ led_trigger_event(psy->charging_trig, LED_FULL);
+ led_trigger_event(psy->full_trig, LED_OFF);
+ break;
+ default:
+ led_trigger_event(psy->charging_full_trig, LED_OFF);
+ led_trigger_event(psy->charging_trig, LED_OFF);
+ led_trigger_event(psy->full_trig, LED_OFF);
+ break;
+ }
+
+ return;
+}
+
+static int power_supply_create_bat_triggers(struct power_supply *psy)
+{
+ int rc = 0;
+
+ psy->charging_full_trig_name = kmalloc(strlen(psy->name) +
+ sizeof("-charging-or-full"), GFP_KERNEL);
+ if (!psy->charging_full_trig_name)
+ goto charging_full_failed;
+
+ psy->charging_trig_name = kmalloc(strlen(psy->name) +
+ sizeof("-charging"), GFP_KERNEL);
+ if (!psy->charging_trig_name)
+ goto charging_failed;
+
+ psy->full_trig_name = kmalloc(strlen(psy->name) +
+ sizeof("-full"), GFP_KERNEL);
+ if (!psy->full_trig_name)
+ goto full_failed;
+
+ strcpy(psy->charging_full_trig_name, psy->name);
+ strcat(psy->charging_full_trig_name, "-charging-or-full");
+ strcpy(psy->charging_trig_name, psy->name);
+ strcat(psy->charging_trig_name, "-charging");
+ strcpy(psy->full_trig_name, psy->name);
+ strcat(psy->full_trig_name, "-full");
+
+ led_trigger_register_simple(psy->charging_full_trig_name,
+ &psy->charging_full_trig);
+ led_trigger_register_simple(psy->charging_trig_name,
+ &psy->charging_trig);
+ led_trigger_register_simple(psy->full_trig_name,
+ &psy->full_trig);
+
+ goto success;
+
+full_failed:
+ kfree(psy->charging_trig_name);
+charging_failed:
+ kfree(psy->charging_full_trig_name);
+charging_full_failed:
+ rc = -ENOMEM;
+success:
+ return rc;
+}
+
+static void power_supply_remove_bat_triggers(struct power_supply *psy)
+{
+ led_trigger_unregister_simple(psy->charging_full_trig);
+ led_trigger_unregister_simple(psy->charging_trig);
+ led_trigger_unregister_simple(psy->full_trig);
+ kfree(psy->full_trig_name);
+ kfree(psy->charging_trig_name);
+ kfree(psy->charging_full_trig_name);
+ return;
+}
+
+/* Generated power specific LEDs triggers. */
+
+static void power_supply_update_gen_leds(struct power_supply *psy)
+{
+ union power_supply_propval online;
+
+ if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
+ return;
+
+ dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, online.intval);
+
+ if (online.intval)
+ led_trigger_event(psy->online_trig, LED_FULL);
+ else
+ led_trigger_event(psy->online_trig, LED_OFF);
+
+ return;
+}
+
+static int power_supply_create_gen_triggers(struct power_supply *psy)
+{
+ int rc = 0;
+
+ psy->online_trig_name = kmalloc(strlen(psy->name) + sizeof("-online"),
+ GFP_KERNEL);
+ if (!psy->online_trig_name)
+ goto online_failed;
+
+ strcpy(psy->online_trig_name, psy->name);
+ strcat(psy->online_trig_name, "-online");
+
+ led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
+
+ goto success;
+
+online_failed:
+ rc = -ENOMEM;
+success:
+ return rc;
+}
+
+static void power_supply_remove_gen_triggers(struct power_supply *psy)
+{
+ led_trigger_unregister_simple(psy->online_trig);
+ kfree(psy->online_trig_name);
+ return;
+}
+
+/* Choice what triggers to create&update. */
+
+void power_supply_update_leds(struct power_supply *psy)
+{
+ if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
+ power_supply_update_bat_leds(psy);
+ else
+ power_supply_update_gen_leds(psy);
+ return;
+}
+
+int power_supply_create_triggers(struct power_supply *psy)
+{
+ if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
+ return power_supply_create_bat_triggers(psy);
+ return power_supply_create_gen_triggers(psy);
+}
+
+void power_supply_remove_triggers(struct power_supply *psy)
+{
+ if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
+ power_supply_remove_bat_triggers(psy);
+ else
+ power_supply_remove_gen_triggers(psy);
+ return;
+}
--- /dev/null
+/*
+ * Sysfs interface for the universal power supply monitor class
+ *
+ * Copyright © 2007 David Woodhouse <dwmw2@infradead.org>
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ *
+ * You may use this code as per GPL version 2
+ */
+
+#include <linux/ctype.h>
+#include <linux/power_supply.h>
+
+/*
+ * This is because the name "current" breaks the device attr macro.
+ * The "current" word resolves to "(get_current())" so instead of
+ * "current" "(get_current())" appears in the sysfs.
+ *
+ * The source of this definition is the device.h which calls __ATTR
+ * macro in sysfs.h which calls the __stringify macro.
+ *
+ * Only modification that the name is not tried to be resolved
+ * (as a macro let's say).
+ */
+
+#define POWER_SUPPLY_ATTR(_name) \
+{ \
+ .attr = { .name = #_name, .mode = 0444, .owner = THIS_MODULE }, \
+ .show = power_supply_show_property, \
+ .store = NULL, \
+}
+
+static struct device_attribute power_supply_attrs[];
+
+static ssize_t power_supply_show_property(struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+ static char *status_text[] = {
+ "Unknown", "Charging", "Discharging", "Not charging", "Full"
+ };
+ static char *health_text[] = {
+ "Unknown", "Good", "Overheat", "Dead", "Over voltage",
+ "Unspecified failure"
+ };
+ static char *technology_text[] = {
+ "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd"
+ };
+ static char *capacity_level_text[] = {
+ "Unknown", "Critical", "Low", "Normal", "High", "Full"
+ };
+ ssize_t ret;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ const ptrdiff_t off = attr - power_supply_attrs;
+ union power_supply_propval value;
+
+ ret = psy->get_property(psy, off, &value);
+
+ if (ret < 0) {
+ if (ret != -ENODEV)
+ dev_err(dev, "driver failed to report `%s' property\n",
+ attr->attr.name);
+ return ret;
+ }
+
+ if (off == POWER_SUPPLY_PROP_STATUS)
+ return sprintf(buf, "%s\n", status_text[value.intval]);
+ else if (off == POWER_SUPPLY_PROP_HEALTH)
+ return sprintf(buf, "%s\n", health_text[value.intval]);
+ else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
+ return sprintf(buf, "%s\n", technology_text[value.intval]);
+ else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
+ return sprintf(buf, "%s\n",
+ capacity_level_text[value.intval]);
+ else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
+ return sprintf(buf, "%s\n", value.strval);
+
+ return sprintf(buf, "%d\n", value.intval);
+}
+
+/* Must be in the same order as POWER_SUPPLY_PROP_* */
+static struct device_attribute power_supply_attrs[] = {
+ /* Properties of type `int' */
+ POWER_SUPPLY_ATTR(status),
+ POWER_SUPPLY_ATTR(health),
+ POWER_SUPPLY_ATTR(present),
+ POWER_SUPPLY_ATTR(online),
+ POWER_SUPPLY_ATTR(technology),
+ POWER_SUPPLY_ATTR(voltage_max_design),
+ POWER_SUPPLY_ATTR(voltage_min_design),
+ POWER_SUPPLY_ATTR(voltage_now),
+ POWER_SUPPLY_ATTR(voltage_avg),
+ POWER_SUPPLY_ATTR(current_now),
+ POWER_SUPPLY_ATTR(current_avg),
+ POWER_SUPPLY_ATTR(charge_full_design),
+ POWER_SUPPLY_ATTR(charge_empty_design),
+ POWER_SUPPLY_ATTR(charge_full),
+ POWER_SUPPLY_ATTR(charge_empty),
+ POWER_SUPPLY_ATTR(charge_now),
+ POWER_SUPPLY_ATTR(charge_avg),
+ POWER_SUPPLY_ATTR(energy_full_design),
+ POWER_SUPPLY_ATTR(energy_empty_design),
+ POWER_SUPPLY_ATTR(energy_full),
+ POWER_SUPPLY_ATTR(energy_empty),
+ POWER_SUPPLY_ATTR(energy_now),
+ POWER_SUPPLY_ATTR(energy_avg),
+ POWER_SUPPLY_ATTR(capacity),
+ POWER_SUPPLY_ATTR(capacity_level),
+ POWER_SUPPLY_ATTR(temp),
+ POWER_SUPPLY_ATTR(temp_ambient),
+ POWER_SUPPLY_ATTR(time_to_empty_now),
+ POWER_SUPPLY_ATTR(time_to_empty_avg),
+ POWER_SUPPLY_ATTR(time_to_full_now),
+ POWER_SUPPLY_ATTR(time_to_full_avg),
+ /* Properties of type `const char *' */
+ POWER_SUPPLY_ATTR(model_name),
+ POWER_SUPPLY_ATTR(manufacturer),
+};
+
+static ssize_t power_supply_show_static_attrs(struct device *dev,
+ struct device_attribute *attr,
+ char *buf) {
+ static char *type_text[] = { "Battery", "UPS", "Mains", "USB" };
+ struct power_supply *psy = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", type_text[psy->type]);
+}
+
+static struct device_attribute power_supply_static_attrs[] = {
+ __ATTR(type, 0444, power_supply_show_static_attrs, NULL),
+};
+
+int power_supply_create_attrs(struct power_supply *psy)
+{
+ int rc = 0;
+ int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++) {
+ rc = device_create_file(psy->dev,
+ &power_supply_static_attrs[i]);
+ if (rc)
+ goto statics_failed;
+ }
+
+ for (j = 0; j < psy->num_properties; j++) {
+ rc = device_create_file(psy->dev,
+ &power_supply_attrs[psy->properties[j]]);
+ if (rc)
+ goto dynamics_failed;
+ }
+
+ goto succeed;
+
+dynamics_failed:
+ while (j--)
+ device_remove_file(psy->dev,
+ &power_supply_attrs[psy->properties[j]]);
+statics_failed:
+ while (i--)
+ device_remove_file(psy->dev,
+ &power_supply_static_attrs[psy->properties[i]]);
+succeed:
+ return rc;
+}
+
+void power_supply_remove_attrs(struct power_supply *psy)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++)
+ device_remove_file(psy->dev,
+ &power_supply_static_attrs[i]);
+
+ for (i = 0; i < psy->num_properties; i++)
+ device_remove_file(psy->dev,
+ &power_supply_attrs[psy->properties[i]]);
+
+ return;
+}
+
+static char *kstruprdup(const char *str, gfp_t gfp)
+{
+ char *ret, *ustr;
+
+ ustr = ret = kmalloc(strlen(str) + 1, gfp);
+
+ if (!ret)
+ return NULL;
+
+ while (*str)
+ *ustr++ = toupper(*str++);
+
+ *ustr = 0;
+
+ return ret;
+}
+
+int power_supply_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ int i = 0, length = 0, ret = 0, j;
+ char *prop_buf;
+ char *attrname;
+
+ dev_dbg(dev, "uevent\n");
+
+ if (!psy) {
+ dev_dbg(dev, "No power supply yet\n");
+ return ret;
+ }
+
+ dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name);
+
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
+ &length, "POWER_SUPPLY_NAME=%s", psy->name);
+ if (ret)
+ return ret;
+
+ prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!prop_buf)
+ return -ENOMEM;
+
+ for (j = 0; j < ARRAY_SIZE(power_supply_static_attrs); j++) {
+ struct device_attribute *attr;
+ char *line;
+
+ attr = &power_supply_static_attrs[j];
+
+ ret = power_supply_show_static_attrs(dev, attr, prop_buf);
+ if (ret < 0)
+ goto out;
+
+ line = strchr(prop_buf, '\n');
+ if (line)
+ *line = 0;
+
+ attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
+ if (!attrname) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ dev_dbg(dev, "Static prop %s=%s\n", attrname, prop_buf);
+
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
+ &length, "POWER_SUPPLY_%s=%s",
+ attrname, prop_buf);
+ kfree(attrname);
+ if (ret)
+ goto out;
+ }
+
+ dev_dbg(dev, "%zd dynamic props\n", psy->num_properties);
+
+ for (j = 0; j < psy->num_properties; j++) {
+ struct device_attribute *attr;
+ char *line;
+
+ attr = &power_supply_attrs[psy->properties[j]];
+
+ ret = power_supply_show_property(dev, attr, prop_buf);
+ if (ret == -ENODEV) {
+ /* When a battery is absent, we expect -ENODEV. Don't abort;
+ send the uevent with at least the the PRESENT=0 property */
+ ret = 0;
+ continue;
+ }
+
+ if (ret < 0)
+ goto out;
+
+ line = strchr(prop_buf, '\n');
+ if (line)
+ *line = 0;
+
+ attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
+ if (!attrname) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf);
+
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
+ &length, "POWER_SUPPLY_%s=%s",
+ attrname, prop_buf);
+ kfree(attrname);
+ if (ret)
+ goto out;
+ }
+
+out:
+ free_page((unsigned long)prop_buf);
+
+ return ret;
+}
Each block has 30 bytes of data and a two byte CRC16.
Full block writes are only allowed if the CRC is valid.
+config W1_SLAVE_DS2760
+ tristate "Dallas 2760 battery monitor chip (HP iPAQ & others)"
+ depends on W1
+ help
+ If you enable this you will have the DS2760 battery monitor
+ chip support.
+
+ The battery monitor chip is used in many batteries/devices
+ as the one who is responsible for charging/discharging/monitoring
+ Li+ batteries.
+
+ If you are unsure, say N.
+
endmenu
obj-$(CONFIG_W1_SLAVE_THERM) += w1_therm.o
obj-$(CONFIG_W1_SLAVE_SMEM) += w1_smem.o
obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
+obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o
--- /dev/null
+/*
+ * 1-Wire implementation for the ds2760 chip
+ *
+ * Copyright © 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/idr.h>
+
+#include "../w1.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+#include "w1_ds2760.h"
+
+static int w1_ds2760_io(struct device *dev, char *buf, int addr, size_t count,
+ int io)
+{
+ struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+
+ if (!dev)
+ return 0;
+
+ mutex_lock(&sl->master->mutex);
+
+ if (addr > DS2760_DATA_SIZE || addr < 0) {
+ count = 0;
+ goto out;
+ }
+ if (addr + count > DS2760_DATA_SIZE)
+ count = DS2760_DATA_SIZE - addr;
+
+ if (!w1_reset_select_slave(sl)) {
+ if (!io) {
+ w1_write_8(sl->master, W1_DS2760_READ_DATA);
+ w1_write_8(sl->master, addr);
+ count = w1_read_block(sl->master, buf, count);
+ } else {
+ w1_write_8(sl->master, W1_DS2760_WRITE_DATA);
+ w1_write_8(sl->master, addr);
+ w1_write_block(sl->master, buf, count);
+ /* XXX w1_write_block returns void, not n_written */
+ }
+ }
+
+out:
+ mutex_unlock(&sl->master->mutex);
+
+ return count;
+}
+
+int w1_ds2760_read(struct device *dev, char *buf, int addr, size_t count)
+{
+ return w1_ds2760_io(dev, buf, addr, count, 0);
+}
+
+int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count)
+{
+ return w1_ds2760_io(dev, buf, addr, count, 1);
+}
+
+static ssize_t w1_ds2760_read_bin(struct kobject *kobj, char *buf, loff_t off,
+ size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ return w1_ds2760_read(dev, buf, off, count);
+}
+
+static struct bin_attribute w1_ds2760_bin_attr = {
+ .attr = {
+ .name = "w1_slave",
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE,
+ },
+ .size = DS2760_DATA_SIZE,
+ .read = w1_ds2760_read_bin,
+};
+
+static DEFINE_IDR(bat_idr);
+static DEFINE_MUTEX(bat_idr_lock);
+
+static int new_bat_id(void)
+{
+ int ret;
+
+ while (1) {
+ int id;
+
+ ret = idr_pre_get(&bat_idr, GFP_KERNEL);
+ if (ret == 0)
+ return -ENOMEM;
+
+ mutex_lock(&bat_idr_lock);
+ ret = idr_get_new(&bat_idr, NULL, &id);
+ mutex_unlock(&bat_idr_lock);
+
+ if (ret == 0) {
+ ret = id & MAX_ID_MASK;
+ break;
+ } else if (ret == -EAGAIN) {
+ continue;
+ } else {
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void release_bat_id(int id)
+{
+ mutex_lock(&bat_idr_lock);
+ idr_remove(&bat_idr, id);
+ mutex_unlock(&bat_idr_lock);
+
+ return;
+}
+
+static int w1_ds2760_add_slave(struct w1_slave *sl)
+{
+ int ret;
+ int id;
+ struct platform_device *pdev;
+
+ id = new_bat_id();
+ if (id < 0) {
+ ret = id;
+ goto noid;
+ }
+
+ pdev = platform_device_alloc("ds2760-battery", id);
+ if (!pdev) {
+ ret = -ENOMEM;
+ goto pdev_alloc_failed;
+ }
+ pdev->dev.parent = &sl->dev;
+
+ ret = platform_device_add(pdev);
+ if (ret)
+ goto pdev_add_failed;
+
+ ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
+ if (ret)
+ goto bin_attr_failed;
+
+ dev_set_drvdata(&sl->dev, pdev);
+
+ goto success;
+
+bin_attr_failed:
+pdev_add_failed:
+ platform_device_unregister(pdev);
+pdev_alloc_failed:
+ release_bat_id(id);
+noid:
+success:
+ return ret;
+}
+
+static void w1_ds2760_remove_slave(struct w1_slave *sl)
+{
+ struct platform_device *pdev = dev_get_drvdata(&sl->dev);
+ int id = pdev->id;
+
+ platform_device_unregister(pdev);
+ release_bat_id(id);
+ sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
+
+ return;
+}
+
+static struct w1_family_ops w1_ds2760_fops = {
+ .add_slave = w1_ds2760_add_slave,
+ .remove_slave = w1_ds2760_remove_slave,
+};
+
+static struct w1_family w1_ds2760_family = {
+ .fid = W1_FAMILY_DS2760,
+ .fops = &w1_ds2760_fops,
+};
+
+static int __init w1_ds2760_init(void)
+{
+ printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor "
+ " chip - (c) 2004-2005, Szabolcs Gyurko\n");
+ idr_init(&bat_idr);
+ return w1_register_family(&w1_ds2760_family);
+}
+
+static void __exit w1_ds2760_exit(void)
+{
+ w1_unregister_family(&w1_ds2760_family);
+ idr_destroy(&bat_idr);
+}
+
+EXPORT_SYMBOL(w1_ds2760_read);
+EXPORT_SYMBOL(w1_ds2760_write);
+
+module_init(w1_ds2760_init);
+module_exit(w1_ds2760_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>");
+MODULE_DESCRIPTION("1-wire Driver Dallas 2760 battery monitor chip");
--- /dev/null
+/*
+ * 1-Wire implementation for the ds2760 chip
+ *
+ * Copyright © 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ *
+ */
+
+#ifndef __w1_ds2760_h__
+#define __w1_ds2760_h__
+
+/* Known commands to the DS2760 chip */
+#define W1_DS2760_SWAP 0xAA
+#define W1_DS2760_READ_DATA 0x69
+#define W1_DS2760_WRITE_DATA 0x6C
+#define W1_DS2760_COPY_DATA 0x48
+#define W1_DS2760_RECALL_DATA 0xB8
+#define W1_DS2760_LOCK 0x6A
+
+/* Number of valid register addresses */
+#define DS2760_DATA_SIZE 0x40
+
+#define DS2760_PROTECTION_REG 0x00
+#define DS2760_STATUS_REG 0x01
+#define DS2760_EEPROM_REG 0x07
+#define DS2760_SPECIAL_FEATURE_REG 0x08
+#define DS2760_VOLTAGE_MSB 0x0c
+#define DS2760_VOLTAGE_LSB 0x0d
+#define DS2760_CURRENT_MSB 0x0e
+#define DS2760_CURRENT_LSB 0x0f
+#define DS2760_CURRENT_ACCUM_MSB 0x10
+#define DS2760_CURRENT_ACCUM_LSB 0x11
+#define DS2760_TEMP_MSB 0x18
+#define DS2760_TEMP_LSB 0x19
+#define DS2760_EEPROM_BLOCK0 0x20
+#define DS2760_ACTIVE_FULL 0x20
+#define DS2760_EEPROM_BLOCK1 0x30
+#define DS2760_RATED_CAPACITY 0x32
+#define DS2760_CURRENT_OFFSET_BIAS 0x33
+#define DS2760_ACTIVE_EMPTY 0x3b
+
+extern int w1_ds2760_read(struct device *dev, char *buf, int addr,
+ size_t count);
+extern int w1_ds2760_write(struct device *dev, char *buf, int addr,
+ size_t count);
+
+#endif /* !__w1_ds2760_h__ */
#define W1_THERM_DS1822 0x22
#define W1_EEPROM_DS2433 0x23
#define W1_THERM_DS18B20 0x28
+#define W1_FAMILY_DS2760 0x30
#define MAXNAMELEN 32
--- /dev/null
+/*
+ * Common power driver for PDAs and phones with one or two external
+ * power supplies (AC/USB) connected to main and backup batteries,
+ * and optional builtin charger.
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ *
+ * 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.
+ */
+
+#ifndef __PDA_POWER_H__
+#define __PDA_POWER_H__
+
+#define PDA_POWER_CHARGE_AC (1 << 0)
+#define PDA_POWER_CHARGE_USB (1 << 1)
+
+struct pda_power_pdata {
+ int (*is_ac_online)(void);
+ int (*is_usb_online)(void);
+ void (*set_charge)(int flags);
+
+ char **supplied_to;
+ size_t num_supplicants;
+
+ unsigned int wait_for_status; /* msecs, default is 500 */
+ unsigned int wait_for_charger; /* msecs, default is 500 */
+};
+
+#endif /* __PDA_POWER_H__ */
--- /dev/null
+/*
+ * Universal power supply monitor class
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ *
+ * You may use this code as per GPL version 2
+ */
+
+#ifndef __LINUX_POWER_SUPPLY_H__
+#define __LINUX_POWER_SUPPLY_H__
+
+#include <linux/device.h>
+#include <linux/workqueue.h>
+#include <linux/leds.h>
+
+/*
+ * All voltages, currents, charges, energies, time and temperatures in uV,
+ * µA, µAh, µWh, seconds and tenths of degree Celsius unless otherwise
+ * stated. It's driver's job to convert its raw values to units in which
+ * this class operates.
+ */
+
+/*
+ * For systems where the charger determines the maximum battery capacity
+ * the min and max fields should be used to present these values to user
+ * space. Unused/unknown fields will not appear in sysfs.
+ */
+
+enum {
+ POWER_SUPPLY_STATUS_UNKNOWN = 0,
+ POWER_SUPPLY_STATUS_CHARGING,
+ POWER_SUPPLY_STATUS_DISCHARGING,
+ POWER_SUPPLY_STATUS_NOT_CHARGING,
+ POWER_SUPPLY_STATUS_FULL,
+};
+
+enum {
+ POWER_SUPPLY_HEALTH_UNKNOWN = 0,
+ POWER_SUPPLY_HEALTH_GOOD,
+ POWER_SUPPLY_HEALTH_OVERHEAT,
+ POWER_SUPPLY_HEALTH_DEAD,
+ POWER_SUPPLY_HEALTH_OVERVOLTAGE,
+ POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
+};
+
+enum {
+ POWER_SUPPLY_TECHNOLOGY_UNKNOWN = 0,
+ POWER_SUPPLY_TECHNOLOGY_NiMH,
+ POWER_SUPPLY_TECHNOLOGY_LION,
+ POWER_SUPPLY_TECHNOLOGY_LIPO,
+ POWER_SUPPLY_TECHNOLOGY_LiFe,
+ POWER_SUPPLY_TECHNOLOGY_NiCd,
+};
+
+enum {
+ POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN = 0,
+ POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL,
+ POWER_SUPPLY_CAPACITY_LEVEL_LOW,
+ POWER_SUPPLY_CAPACITY_LEVEL_NORMAL,
+ POWER_SUPPLY_CAPACITY_LEVEL_HIGH,
+ POWER_SUPPLY_CAPACITY_LEVEL_FULL,
+};
+
+enum power_supply_property {
+ /* Properties of type `int' */
+ POWER_SUPPLY_PROP_STATUS = 0,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_EMPTY,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_CHARGE_AVG,
+ POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
+ POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN,
+ POWER_SUPPLY_PROP_ENERGY_FULL,
+ POWER_SUPPLY_PROP_ENERGY_EMPTY,
+ POWER_SUPPLY_PROP_ENERGY_NOW,
+ POWER_SUPPLY_PROP_ENERGY_AVG,
+ POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_AMBIENT,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+ POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
+ POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
+ /* Properties of type `const char *' */
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+enum power_supply_type {
+ POWER_SUPPLY_TYPE_BATTERY = 0,
+ POWER_SUPPLY_TYPE_UPS,
+ POWER_SUPPLY_TYPE_MAINS,
+ POWER_SUPPLY_TYPE_USB,
+};
+
+union power_supply_propval {
+ int intval;
+ const char *strval;
+};
+
+struct power_supply {
+ const char *name;
+ enum power_supply_type type;
+ enum power_supply_property *properties;
+ size_t num_properties;
+
+ char **supplied_to;
+ size_t num_supplicants;
+
+ int (*get_property)(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val);
+ void (*external_power_changed)(struct power_supply *psy);
+
+ /* For APM emulation, think legacy userspace. */
+ int use_for_apm;
+
+ /* private */
+ struct device *dev;
+ struct work_struct changed_work;
+
+#ifdef CONFIG_LEDS_TRIGGERS
+ struct led_trigger *charging_full_trig;
+ char *charging_full_trig_name;
+ struct led_trigger *charging_trig;
+ char *charging_trig_name;
+ struct led_trigger *full_trig;
+ char *full_trig_name;
+ struct led_trigger *online_trig;
+ char *online_trig_name;
+#endif
+};
+
+/*
+ * This is recommended structure to specify static power supply parameters.
+ * Generic one, parametrizable for different power supplies. Power supply
+ * class itself does not use it, but that's what implementing most platform
+ * drivers, should try reuse for consistency.
+ */
+
+struct power_supply_info {
+ const char *name;
+ int technology;
+ int voltage_max_design;
+ int voltage_min_design;
+ int charge_full_design;
+ int charge_empty_design;
+ int energy_full_design;
+ int energy_empty_design;
+ int use_for_apm;
+};
+
+extern void power_supply_changed(struct power_supply *psy);
+extern int power_supply_am_i_supplied(struct power_supply *psy);
+
+extern int power_supply_register(struct device *parent,
+ struct power_supply *psy);
+extern void power_supply_unregister(struct power_supply *psy);
+
+/* For APM emulation, think legacy userspace. */
+extern struct class *power_supply_class;
+
+#endif /* __LINUX_POWER_SUPPLY_H__ */
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff