ds2760_battery.c revision 9c6f8740d0c8d2b4de78511257f38384f4cbb292
1fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov/* 2fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * Driver for batteries with DS2760 chips inside. 3fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 4fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * Copyright © 2007 Anton Vorontsov 5fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 2004-2007 Matt Reimer 6fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 2004 Szabolcs Gyurko 7fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 8fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * Use consistent with the GNU GPL is permitted, 9fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * provided that this copyright notice is 10fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * preserved in its entirety in all copies and derived works. 11fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 12fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * Author: Anton Vorontsov <cbou@mail.ru> 13fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * February 2007 14fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 15fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * Matt Reimer <mreimer@vpop.net> 16fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * April 2004, 2005, 2007 17fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * 18fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> 19fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * September 2004 20fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov */ 21fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 22fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/module.h> 23fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/param.h> 24fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/jiffies.h> 25fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/workqueue.h> 26fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/pm.h> 275a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 28fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/platform_device.h> 29fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/power_supply.h> 30fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 31fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include "../w1/w1.h" 32fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include "../w1/slaves/w1_ds2760.h" 33fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 34fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstruct ds2760_device_info { 35fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct device *dev; 36fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 37fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 data, valid after calling ds2760_battery_read_status() */ 38fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov unsigned long update_time; /* jiffies when data read */ 39fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov char raw[DS2760_DATA_SIZE]; /* raw DS2760 data */ 40fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int voltage_raw; /* units of 4.88 mV */ 41fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int voltage_uV; /* units of µV */ 42fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int current_raw; /* units of 0.625 mA */ 43fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int current_uA; /* units of µA */ 44fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int accum_current_raw; /* units of 0.25 mAh */ 45fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int accum_current_uAh; /* units of µAh */ 46fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int temp_raw; /* units of 0.125 °C */ 47fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int temp_C; /* units of 0.1 °C */ 48fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int rated_capacity; /* units of µAh */ 49fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int rem_capacity; /* percentage */ 50fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int full_active_uAh; /* units of µAh */ 51fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int empty_uAh; /* units of µAh */ 52fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int life_sec; /* units of seconds */ 53fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int charge_status; /* POWER_SUPPLY_STATUS_* */ 54fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 55fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int full_counter; 56fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct power_supply bat; 57fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct device *w1_dev; 58fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct workqueue_struct *monitor_wqueue; 59fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct delayed_work monitor_work; 608d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack struct delayed_work set_charged_work; 61fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 62fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 63fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic unsigned int cache_time = 1000; 64fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovmodule_param(cache_time, uint, 0644); 65fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_PARM_DESC(cache_time, "cache time in milliseconds"); 66fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 67cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mackstatic unsigned int pmod_enabled; 68cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mackmodule_param(pmod_enabled, bool, 0644); 69cef437e3a9b6d229d4ed3730cde047007267df6dDaniel MackMODULE_PARM_DESC(pmod_enabled, "PMOD enable bit"); 70cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack 71c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mackstatic unsigned int rated_capacity; 72c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mackmodule_param(rated_capacity, uint, 0644); 73c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel MackMODULE_PARM_DESC(rated_capacity, "rated battery capacity, 10*mAh or index"); 74c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack 7502d0d2758821c38b2601d34dac544140af09e651Daniel Mackstatic unsigned int current_accum; 7602d0d2758821c38b2601d34dac544140af09e651Daniel Mackmodule_param(current_accum, uint, 0644); 7702d0d2758821c38b2601d34dac544140af09e651Daniel MackMODULE_PARM_DESC(current_accum, "current accumulator value"); 7802d0d2758821c38b2601d34dac544140af09e651Daniel Mack 79fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov/* Some batteries have their rated capacity stored a N * 10 mAh, while 80fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * others use an index into this table. */ 81fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int rated_capacities[] = { 82fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 0, 83fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* Samsung */ 84fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* BYD */ 85fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* Lishen */ 86fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* NEC */ 87fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* Samsung */ 88fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* BYD */ 899c6f8740d0c8d2b4de78511257f38384f4cbb292Paul Parsons#ifdef CONFIG_MACH_H4700 909c6f8740d0c8d2b4de78511257f38384f4cbb292Paul Parsons 1800, /* HP iPAQ hx4700 3.7V 1800mAh (359113-001) */ 919c6f8740d0c8d2b4de78511257f38384f4cbb292Paul Parsons#else 92fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* Lishen */ 939c6f8740d0c8d2b4de78511257f38384f4cbb292Paul Parsons#endif 94fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* NEC */ 95fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880, /* Samsung */ 96fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880, /* BYD */ 97fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880, /* Lishen */ 98fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880 /* NEC */ 99fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 100fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 101fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C 102fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * temp is in Celsius */ 103fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int battery_interpolate(int array[], int temp) 104fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 105fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int index, dt; 106fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 107fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (temp <= 0) 108fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return array[0]; 109fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (temp >= 40) 110fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return array[4]; 111fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 112fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov index = temp / 10; 113fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dt = temp % 10; 114fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 115fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return array[index] + (((array[index + 1] - array[index]) * dt) / 10); 116fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 117fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 118fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_read_status(struct ds2760_device_info *di) 119fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 120fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int ret, i, start, count, scale[5]; 121fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 122fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->update_time && time_before(jiffies, di->update_time + 123fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov msecs_to_jiffies(cache_time))) 124fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 125fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 126fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* The first time we read the entire contents of SRAM/EEPROM, 127fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * but after that we just read the interesting bits that change. */ 128fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->update_time == 0) { 129fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov start = 0; 130fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov count = DS2760_DATA_SIZE; 131fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else { 132fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov start = DS2760_VOLTAGE_MSB; 133fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov count = DS2760_TEMP_LSB - start + 1; 134fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 135fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 136fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ret = w1_ds2760_read(di->w1_dev, di->raw + start, start, count); 137fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (ret != count) { 138fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n", 139fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->w1_dev); 140fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 1; 141fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 142fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 143fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->update_time = jiffies; 144fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 145fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports voltage in units of 4.88mV, but the battery class 146fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * reports in units of uV, so convert by multiplying by 4880. */ 147fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) | 148fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->raw[DS2760_VOLTAGE_LSB] >> 5); 149fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->voltage_uV = di->voltage_raw * 4880; 150fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 151fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports current in signed units of 0.625mA, but the battery 152fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * class reports in units of µA, so convert by multiplying by 625. */ 153fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->current_raw = 154fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) | 155fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->raw[DS2760_CURRENT_LSB] >> 3); 156fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->current_uA = di->current_raw * 625; 157fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 158fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports accumulated current in signed units of 0.25mAh. */ 159fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->accum_current_raw = 160fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) | 161fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->raw[DS2760_CURRENT_ACCUM_LSB]; 162fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->accum_current_uAh = di->accum_current_raw * 250; 163fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 164fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports temperature in signed units of 0.125°C, but the 165fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * battery class reports in units of 1/10 °C, so we convert by 166fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * multiplying by .125 * 10 = 1.25. */ 167fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) | 168fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->raw[DS2760_TEMP_LSB] >> 5); 169fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->temp_C = di->temp_raw + (di->temp_raw / 4); 170fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 171fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* At least some battery monitors (e.g. HP iPAQ) store the battery's 172fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * maximum rated capacity. */ 173fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities)) 174fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rated_capacity = rated_capacities[ 175fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (unsigned int)di->raw[DS2760_RATED_CAPACITY]]; 176fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov else 177fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10; 178fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 179fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rated_capacity *= 1000; /* convert to µAh */ 180fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 181fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* Calculate the full level at the present temperature. */ 182fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 | 183fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->raw[DS2760_ACTIVE_FULL + 1]; 184fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 18525f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack /* If the full_active_uAh value is not given, fall back to the rated 18625f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack * capacity. This is likely to happen when chips are not part of the 18725f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack * battery pack and is therefore not bootstrapped. */ 18825f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack if (di->full_active_uAh == 0) 18925f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack di->full_active_uAh = di->rated_capacity / 1000L; 19025f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack 19125f2bfa62ae77820a8185734c4a2ab7f3971a2fcDaniel Mack scale[0] = di->full_active_uAh; 192fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov for (i = 1; i < 5; i++) 1933af98a8f39dee8ffb93a93e4145276d58e66e48fPaul Parsons scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 1 + i]; 194fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 195fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10); 196fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_active_uAh *= 1000; /* convert to µAh */ 197fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 198fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* Calculate the empty level at the present temperature. */ 199fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4]; 200fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov for (i = 3; i >= 0; i--) 201fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i]; 202fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 203fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->empty_uAh = battery_interpolate(scale, di->temp_C / 10); 204fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->empty_uAh *= 1000; /* convert to µAh */ 205fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 206a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack if (di->full_active_uAh == di->empty_uAh) 207a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack di->rem_capacity = 0; 208a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack else 209a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack /* From Maxim Application Note 131: remaining capacity = 210a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */ 211a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) / 212a4e3f91b98d86ae0b5c816fe45190bb29ac32f71Daniel Mack (di->full_active_uAh - di->empty_uAh); 213fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 214fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->rem_capacity < 0) 215fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rem_capacity = 0; 216fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->rem_capacity > 100) 217fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rem_capacity = 100; 218fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 21986af95039b69a90db15294eb1f9c147f1df0a8eaSven Neumann if (di->current_uA < -100L) 220b0525b48f06714e8d5cf6a3266261b71de8d6dd4Daniel Mack di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 36L) 221b0525b48f06714e8d5cf6a3266261b71de8d6dd4Daniel Mack / (di->current_uA / 100L); 222fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov else 223fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->life_sec = 0; 224fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 225fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 226fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 227fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 22802d0d2758821c38b2601d34dac544140af09e651Daniel Mackstatic void ds2760_battery_set_current_accum(struct ds2760_device_info *di, 22902d0d2758821c38b2601d34dac544140af09e651Daniel Mack unsigned int acr_val) 23002d0d2758821c38b2601d34dac544140af09e651Daniel Mack{ 23102d0d2758821c38b2601d34dac544140af09e651Daniel Mack unsigned char acr[2]; 23202d0d2758821c38b2601d34dac544140af09e651Daniel Mack 23302d0d2758821c38b2601d34dac544140af09e651Daniel Mack /* acr is in units of 0.25 mAh */ 23402d0d2758821c38b2601d34dac544140af09e651Daniel Mack acr_val *= 4L; 23502d0d2758821c38b2601d34dac544140af09e651Daniel Mack acr_val /= 1000; 23602d0d2758821c38b2601d34dac544140af09e651Daniel Mack 23702d0d2758821c38b2601d34dac544140af09e651Daniel Mack acr[0] = acr_val >> 8; 23802d0d2758821c38b2601d34dac544140af09e651Daniel Mack acr[1] = acr_val & 0xff; 23902d0d2758821c38b2601d34dac544140af09e651Daniel Mack 24002d0d2758821c38b2601d34dac544140af09e651Daniel Mack if (w1_ds2760_write(di->w1_dev, acr, DS2760_CURRENT_ACCUM_MSB, 2) < 2) 24102d0d2758821c38b2601d34dac544140af09e651Daniel Mack dev_warn(di->dev, "ACR write failed\n"); 24202d0d2758821c38b2601d34dac544140af09e651Daniel Mack} 24302d0d2758821c38b2601d34dac544140af09e651Daniel Mack 244fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void ds2760_battery_update_status(struct ds2760_device_info *di) 245fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 246fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int old_charge_status = di->charge_status; 247fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 248fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_read_status(di); 249fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 250fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN) 251fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 252fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 253fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (power_supply_am_i_supplied(&di->bat)) { 254fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->current_uA > 10000) { 255fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 256fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 257fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else if (di->current_uA < -5000) { 258fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING) 259fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_notice(di->dev, "not enough power to " 260fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "charge\n"); 261fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 262fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 263fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else if (di->current_uA < 10000 && 264fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status != POWER_SUPPLY_STATUS_FULL) { 265fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 266fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* Don't consider the battery to be full unless 267fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * we've seen the current < 10 mA at least two 268fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * consecutive times. */ 269fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 270fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter++; 271fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 272fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->full_counter < 2) { 273fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 274fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else { 275fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_FULL; 27602d0d2758821c38b2601d34dac544140af09e651Daniel Mack ds2760_battery_set_current_accum(di, 27702d0d2758821c38b2601d34dac544140af09e651Daniel Mack di->full_active_uAh); 278fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 279fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 280fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else { 281fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 282fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 283fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 284fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 285fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->charge_status != old_charge_status) 286fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_changed(&di->bat); 287fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 288fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 289cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mackstatic void ds2760_battery_write_status(struct ds2760_device_info *di, 290cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack char status) 291cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack{ 292cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack if (status == di->raw[DS2760_STATUS_REG]) 293cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack return; 294cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack 295cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack w1_ds2760_write(di->w1_dev, &status, DS2760_STATUS_WRITE_REG, 1); 296cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1); 297cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1); 298cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack} 299cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack 300c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mackstatic void ds2760_battery_write_rated_capacity(struct ds2760_device_info *di, 301c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack unsigned char rated_capacity) 302c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack{ 303c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack if (rated_capacity == di->raw[DS2760_RATED_CAPACITY]) 304c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack return; 305c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack 306c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack w1_ds2760_write(di->w1_dev, &rated_capacity, DS2760_RATED_CAPACITY, 1); 307c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1); 308c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1); 309c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack} 310c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack 311bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mackstatic void ds2760_battery_write_active_full(struct ds2760_device_info *di, 312bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack int active_full) 313bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack{ 314bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack unsigned char tmp[2] = { 315bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack active_full >> 8, 316bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack active_full & 0xff 317bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack }; 318bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 319bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack if (tmp[0] == di->raw[DS2760_ACTIVE_FULL] && 320bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack tmp[1] == di->raw[DS2760_ACTIVE_FULL + 1]) 321bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack return; 322bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 323bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack w1_ds2760_write(di->w1_dev, tmp, DS2760_ACTIVE_FULL, sizeof(tmp)); 324bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK0); 325bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK0); 326bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 327bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack /* Write to the di->raw[] buffer directly - the DS2760_ACTIVE_FULL 328bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack * values won't be read back by ds2760_battery_read_status() */ 329bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack di->raw[DS2760_ACTIVE_FULL] = tmp[0]; 330bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack di->raw[DS2760_ACTIVE_FULL + 1] = tmp[1]; 331bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack} 332bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 333fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void ds2760_battery_work(struct work_struct *work) 334fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 335fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = container_of(work, 336fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info, monitor_work.work); 337fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov const int interval = HZ * 60; 338fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 3390cddc0a906ee3e47ce3e09107d385ff89f87cd6dHarvey Harrison dev_dbg(di->dev, "%s\n", __func__); 340fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 341fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_update_status(di); 342fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval); 343fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 344fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 345fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#define to_ds2760_device_info(x) container_of((x), struct ds2760_device_info, \ 346fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov bat); 347fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 348fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void ds2760_battery_external_power_changed(struct power_supply *psy) 349fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 350fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = to_ds2760_device_info(psy); 351fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 3520cddc0a906ee3e47ce3e09107d385ff89f87cd6dHarvey Harrison dev_dbg(di->dev, "%s\n", __func__); 353fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 354fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov cancel_delayed_work(&di->monitor_work); 355fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10); 356fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 357fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 3588d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3598d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mackstatic void ds2760_battery_set_charged_work(struct work_struct *work) 3608d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack{ 3618d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack char bias; 3628d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack struct ds2760_device_info *di = container_of(work, 3638d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack struct ds2760_device_info, set_charged_work.work); 3648d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3658d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack dev_dbg(di->dev, "%s\n", __func__); 3668d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3678d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack ds2760_battery_read_status(di); 3688d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3698d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack /* When we get notified by external circuitry that the battery is 3708d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * considered fully charged now, we know that there is no current 3718d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * flow any more. However, the ds2760's internal current meter is 3728d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * too inaccurate to rely on - spec say something ~15% failure. 3738d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * Hence, we use the current offset bias register to compensate 3748d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * that error. 3758d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack */ 3768d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3778d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack if (!power_supply_am_i_supplied(&di->bat)) 3788d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack return; 3798d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3808d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack bias = (signed char) di->current_raw + 3818d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack (signed char) di->raw[DS2760_CURRENT_OFFSET_BIAS]; 3828d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3838d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack dev_dbg(di->dev, "%s: bias = %d\n", __func__, bias); 3848d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3858d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack w1_ds2760_write(di->w1_dev, &bias, DS2760_CURRENT_OFFSET_BIAS, 1); 3868d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1); 3878d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1); 3888d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3898d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack /* Write to the di->raw[] buffer directly - the CURRENT_OFFSET_BIAS 3908d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * value won't be read back by ds2760_battery_read_status() */ 3918d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack di->raw[DS2760_CURRENT_OFFSET_BIAS] = bias; 3928d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack} 3938d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3948d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mackstatic void ds2760_battery_set_charged(struct power_supply *psy) 3958d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack{ 3968d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack struct ds2760_device_info *di = to_ds2760_device_info(psy); 3978d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 3988d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack /* postpone the actual work by 20 secs. This is for debouncing GPIO 3998d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack * signals and to let the current value settle. See AN4188. */ 4008d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack cancel_delayed_work(&di->set_charged_work); 4018d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack queue_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20); 4028d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack} 4038d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack 404fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_get_property(struct power_supply *psy, 405fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov enum power_supply_property psp, 406fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov union power_supply_propval *val) 407fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 408fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = to_ds2760_device_info(psy); 409fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 410fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov switch (psp) { 411fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_STATUS: 412fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->charge_status; 413fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 414fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov default: 415fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 416fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 417fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 418fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_read_status(di); 419fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 420fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov switch (psp) { 421fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_VOLTAGE_NOW: 422fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->voltage_uV; 423fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 424fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CURRENT_NOW: 425fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->current_uA; 426fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 427fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 428fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->rated_capacity; 429fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 430fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_FULL: 431fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->full_active_uAh; 432fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 433fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_EMPTY: 434fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->empty_uAh; 435fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 436fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_NOW: 437fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->accum_current_uAh; 438fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 439fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_TEMP: 440fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->temp_C; 441fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 4425c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: 4435c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack val->intval = di->life_sec; 4445c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack break; 4455c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack case POWER_SUPPLY_PROP_CAPACITY: 4465c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack val->intval = di->rem_capacity; 4475c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack break; 448fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov default: 449fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return -EINVAL; 450fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 451fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 452fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 453fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 454fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 455bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mackstatic int ds2760_battery_set_property(struct power_supply *psy, 456bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack enum power_supply_property psp, 457bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack const union power_supply_propval *val) 458bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack{ 459bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack struct ds2760_device_info *di = to_ds2760_device_info(psy); 460bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 461bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack switch (psp) { 462bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack case POWER_SUPPLY_PROP_CHARGE_FULL: 463bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack /* the interface counts in uAh, convert the value */ 464bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack ds2760_battery_write_active_full(di, val->intval / 1000L); 465bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack break; 466bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 467bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack case POWER_SUPPLY_PROP_CHARGE_NOW: 468bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack /* ds2760_battery_set_current_accum() does the conversion */ 469bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack ds2760_battery_set_current_accum(di, val->intval); 470bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack break; 471bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 472bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack default: 473bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack return -EPERM; 474bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack } 475bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 476bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack return 0; 477bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack} 478bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 479bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mackstatic int ds2760_battery_property_is_writeable(struct power_supply *psy, 480bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack enum power_supply_property psp) 481bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack{ 482bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack switch (psp) { 483bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack case POWER_SUPPLY_PROP_CHARGE_FULL: 484bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack case POWER_SUPPLY_PROP_CHARGE_NOW: 485bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack return 1; 486bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 487bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack default: 488bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack break; 489bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack } 490bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 491bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack return 0; 492bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack} 493bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack 494fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic enum power_supply_property ds2760_battery_props[] = { 495fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_STATUS, 496fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_VOLTAGE_NOW, 497fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CURRENT_NOW, 498fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 499fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_FULL, 500fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_EMPTY, 501fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_NOW, 502fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_TEMP, 5035c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, 5045c6e9bf2c96e746237516bc8897add67682ee452Daniel Mack POWER_SUPPLY_PROP_CAPACITY, 505fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 506fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 507fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_probe(struct platform_device *pdev) 508fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 509cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack char status; 510fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int retval = 0; 511fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di; 512fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 513fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di = kzalloc(sizeof(*di), GFP_KERNEL); 514fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (!di) { 515fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov retval = -ENOMEM; 516fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto di_alloc_failed; 517fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 518fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 519fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov platform_set_drvdata(pdev, di); 520fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 521ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->dev = &pdev->dev; 522ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->w1_dev = pdev->dev.parent; 523ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->bat.name = dev_name(&pdev->dev); 524ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->bat.type = POWER_SUPPLY_TYPE_BATTERY; 525ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->bat.properties = ds2760_battery_props; 526ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props); 527ae9fb6e814ecede683bcd404910085cea3ab1260Daniel Mack di->bat.get_property = ds2760_battery_get_property; 528bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack di->bat.set_property = ds2760_battery_set_property; 529bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack di->bat.property_is_writeable = 530bd52ca555ef36bf5b790178cfe8b7d42b5c16ca6Daniel Mack ds2760_battery_property_is_writeable; 5318d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack di->bat.set_charged = ds2760_battery_set_charged; 532fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.external_power_changed = 533fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_external_power_changed; 534fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 535fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; 536fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 537cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack /* enable sleep mode feature */ 538cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack ds2760_battery_read_status(di); 539cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack status = di->raw[DS2760_STATUS_REG]; 540cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack if (pmod_enabled) 541cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack status |= DS2760_STATUS_PMOD; 542cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack else 543cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack status &= ~DS2760_STATUS_PMOD; 544cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack 545cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack ds2760_battery_write_status(di, status); 546cef437e3a9b6d229d4ed3730cde047007267df6dDaniel Mack 547c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack /* set rated capacity from module param */ 548c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack if (rated_capacity) 549c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack ds2760_battery_write_rated_capacity(di, rated_capacity); 550c1e72193ea3fa02e96bf3aa66006e18d107d0266Daniel Mack 55102d0d2758821c38b2601d34dac544140af09e651Daniel Mack /* set current accumulator if given as parameter. 55202d0d2758821c38b2601d34dac544140af09e651Daniel Mack * this should only be done for bootstrapping the value */ 55302d0d2758821c38b2601d34dac544140af09e651Daniel Mack if (current_accum) 55402d0d2758821c38b2601d34dac544140af09e651Daniel Mack ds2760_battery_set_current_accum(di, current_accum); 55502d0d2758821c38b2601d34dac544140af09e651Daniel Mack 5562e83a5c5d2317c386de2880eb43ef0bef8eb1fa9Daniel Mack retval = power_supply_register(&pdev->dev, &di->bat); 5572e83a5c5d2317c386de2880eb43ef0bef8eb1fa9Daniel Mack if (retval) { 5582e83a5c5d2317c386de2880eb43ef0bef8eb1fa9Daniel Mack dev_err(di->dev, "failed to register battery\n"); 5592e83a5c5d2317c386de2880eb43ef0bef8eb1fa9Daniel Mack goto batt_failed; 5602e83a5c5d2317c386de2880eb43ef0bef8eb1fa9Daniel Mack } 5612e83a5c5d2317c386de2880eb43ef0bef8eb1fa9Daniel Mack 562fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work); 5638d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack INIT_DELAYED_WORK(&di->set_charged_work, 5648d631ccff8d90fce77b42f01b3872595c599cbf9Daniel Mack ds2760_battery_set_charged_work); 565ba88b0029fcdc39d23acd4d0e64b38145ffa4d5fKay Sievers di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev)); 566fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (!di->monitor_wqueue) { 567fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov retval = -ESRCH; 568fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto workqueue_failed; 569fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 570fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1); 571fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 572fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto success; 573fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 574fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovworkqueue_failed: 575fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_unregister(&di->bat); 576fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovbatt_failed: 577fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov kfree(di); 578fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovdi_alloc_failed: 579fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovsuccess: 580fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return retval; 581fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 582fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 583fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_remove(struct platform_device *pdev) 584fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 585fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = platform_get_drvdata(pdev); 586fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 587afe2c511fb2d75f1515081ff1be15bd79cfe722dTejun Heo cancel_delayed_work_sync(&di->monitor_work); 588afe2c511fb2d75f1515081ff1be15bd79cfe722dTejun Heo cancel_delayed_work_sync(&di->set_charged_work); 589fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov destroy_workqueue(di->monitor_wqueue); 590fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_unregister(&di->bat); 591a01bce6ad970d181797dffff5649e1e6989aa88bAxel Lin kfree(di); 592fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 593fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 594fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 595fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 596fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#ifdef CONFIG_PM 597fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 598fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_suspend(struct platform_device *pdev, 599fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov pm_message_t state) 600fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 601fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = platform_get_drvdata(pdev); 602fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 603fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; 604fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 605fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 606fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 607fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 608fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_resume(struct platform_device *pdev) 609fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 610fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = platform_get_drvdata(pdev); 611fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 612fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; 613fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_changed(&di->bat); 614fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 615fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov cancel_delayed_work(&di->monitor_work); 616fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ); 617fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 618fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 619fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 620fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 621fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#else 622fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 623fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#define ds2760_battery_suspend NULL 624fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#define ds2760_battery_resume NULL 625fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 626fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#endif /* CONFIG_PM */ 627fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 6282f5a5cf93fae7b8354b45b8443dcc3448a8fc276Kay SieversMODULE_ALIAS("platform:ds2760-battery"); 6292f5a5cf93fae7b8354b45b8443dcc3448a8fc276Kay Sievers 630fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic struct platform_driver ds2760_battery_driver = { 631fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .driver = { 632fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .name = "ds2760-battery", 633fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov }, 634fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .probe = ds2760_battery_probe, 635fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .remove = ds2760_battery_remove, 636fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .suspend = ds2760_battery_suspend, 637fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .resume = ds2760_battery_resume, 638fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 639fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 640fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int __init ds2760_battery_init(void) 641fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 642fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return platform_driver_register(&ds2760_battery_driver); 643fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 644fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 645fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void __exit ds2760_battery_exit(void) 646fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 647fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov platform_driver_unregister(&ds2760_battery_driver); 648fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 649fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 650fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovmodule_init(ds2760_battery_init); 651fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovmodule_exit(ds2760_battery_exit); 652fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 653fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_LICENSE("GPL"); 654fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, " 655fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "Matt Reimer <mreimer@vpop.net>, " 656fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "Anton Vorontsov <cbou@mail.ru>"); 657fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_DESCRIPTION("ds2760 battery driver"); 658