ds2760_battery.c revision fe0e3153acfef4864b69932cf116eb5f38f7500c
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> 27fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/platform_device.h> 28fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include <linux/power_supply.h> 29fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 30fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include "../w1/w1.h" 31fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#include "../w1/slaves/w1_ds2760.h" 32fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 33fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstruct ds2760_device_info { 34fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct device *dev; 35fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 36fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 data, valid after calling ds2760_battery_read_status() */ 37fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov unsigned long update_time; /* jiffies when data read */ 38fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov char raw[DS2760_DATA_SIZE]; /* raw DS2760 data */ 39fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int voltage_raw; /* units of 4.88 mV */ 40fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int voltage_uV; /* units of µV */ 41fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int current_raw; /* units of 0.625 mA */ 42fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int current_uA; /* units of µA */ 43fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int accum_current_raw; /* units of 0.25 mAh */ 44fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int accum_current_uAh; /* units of µAh */ 45fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int temp_raw; /* units of 0.125 °C */ 46fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int temp_C; /* units of 0.1 °C */ 47fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int rated_capacity; /* units of µAh */ 48fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int rem_capacity; /* percentage */ 49fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int full_active_uAh; /* units of µAh */ 50fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int empty_uAh; /* units of µAh */ 51fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int life_sec; /* units of seconds */ 52fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int charge_status; /* POWER_SUPPLY_STATUS_* */ 53fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 54fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int full_counter; 55fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct power_supply bat; 56fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct device *w1_dev; 57fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct workqueue_struct *monitor_wqueue; 58fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct delayed_work monitor_work; 59fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 60fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 61fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic unsigned int cache_time = 1000; 62fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovmodule_param(cache_time, uint, 0644); 63fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_PARM_DESC(cache_time, "cache time in milliseconds"); 64fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 65fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov/* Some batteries have their rated capacity stored a N * 10 mAh, while 66fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * others use an index into this table. */ 67fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int rated_capacities[] = { 68fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 0, 69fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* Samsung */ 70fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* BYD */ 71fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* Lishen */ 72fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 920, /* NEC */ 73fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* Samsung */ 74fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* BYD */ 75fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* Lishen */ 76fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 1440, /* NEC */ 77fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880, /* Samsung */ 78fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880, /* BYD */ 79fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880, /* Lishen */ 80fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 2880 /* NEC */ 81fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 82fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 83fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C 84fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * temp is in Celsius */ 85fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int battery_interpolate(int array[], int temp) 86fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 87fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int index, dt; 88fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 89fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (temp <= 0) 90fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return array[0]; 91fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (temp >= 40) 92fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return array[4]; 93fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 94fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov index = temp / 10; 95fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dt = temp % 10; 96fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 97fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return array[index] + (((array[index + 1] - array[index]) * dt) / 10); 98fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 99fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 100fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_read_status(struct ds2760_device_info *di) 101fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 102fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int ret, i, start, count, scale[5]; 103fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 104fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->update_time && time_before(jiffies, di->update_time + 105fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov msecs_to_jiffies(cache_time))) 106fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 107fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 108fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* The first time we read the entire contents of SRAM/EEPROM, 109fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * but after that we just read the interesting bits that change. */ 110fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->update_time == 0) { 111fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov start = 0; 112fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov count = DS2760_DATA_SIZE; 113fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else { 114fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov start = DS2760_VOLTAGE_MSB; 115fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov count = DS2760_TEMP_LSB - start + 1; 116fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 117fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 118fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ret = w1_ds2760_read(di->w1_dev, di->raw + start, start, count); 119fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (ret != count) { 120fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n", 121fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->w1_dev); 122fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 1; 123fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 124fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 125fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->update_time = jiffies; 126fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 127fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports voltage in units of 4.88mV, but the battery class 128fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * reports in units of uV, so convert by multiplying by 4880. */ 129fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) | 130fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->raw[DS2760_VOLTAGE_LSB] >> 5); 131fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->voltage_uV = di->voltage_raw * 4880; 132fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 133fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports current in signed units of 0.625mA, but the battery 134fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * class reports in units of µA, so convert by multiplying by 625. */ 135fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->current_raw = 136fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) | 137fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->raw[DS2760_CURRENT_LSB] >> 3); 138fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->current_uA = di->current_raw * 625; 139fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 140fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports accumulated current in signed units of 0.25mAh. */ 141fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->accum_current_raw = 142fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) | 143fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->raw[DS2760_CURRENT_ACCUM_LSB]; 144fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->accum_current_uAh = di->accum_current_raw * 250; 145fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 146fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* DS2760 reports temperature in signed units of 0.125°C, but the 147fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * battery class reports in units of 1/10 °C, so we convert by 148fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * multiplying by .125 * 10 = 1.25. */ 149fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) | 150fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->raw[DS2760_TEMP_LSB] >> 5); 151fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->temp_C = di->temp_raw + (di->temp_raw / 4); 152fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 153fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* At least some battery monitors (e.g. HP iPAQ) store the battery's 154fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * maximum rated capacity. */ 155fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities)) 156fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rated_capacity = rated_capacities[ 157fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (unsigned int)di->raw[DS2760_RATED_CAPACITY]]; 158fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov else 159fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10; 160fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 161fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rated_capacity *= 1000; /* convert to µAh */ 162fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 163fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* Calculate the full level at the present temperature. */ 164fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 | 165fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->raw[DS2760_ACTIVE_FULL + 1]; 166fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 167fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov scale[0] = di->raw[DS2760_ACTIVE_FULL] << 8 | 168fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->raw[DS2760_ACTIVE_FULL + 1]; 169fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov for (i = 1; i < 5; i++) 170fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 2 + i]; 171fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 172fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10); 173fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_active_uAh *= 1000; /* convert to µAh */ 174fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 175fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* Calculate the empty level at the present temperature. */ 176fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4]; 177fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov for (i = 3; i >= 0; i--) 178fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i]; 179fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 180fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->empty_uAh = battery_interpolate(scale, di->temp_C / 10); 181fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->empty_uAh *= 1000; /* convert to µAh */ 182fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 183fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* From Maxim Application Note 131: remaining capacity = 184fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */ 185fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) / 186fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov (di->full_active_uAh - di->empty_uAh); 187fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 188fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->rem_capacity < 0) 189fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rem_capacity = 0; 190fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->rem_capacity > 100) 191fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->rem_capacity = 100; 192fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 193fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->current_uA) 194fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 195fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 3600L) / di->current_uA; 196fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov else 197fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->life_sec = 0; 198fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 199fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 200fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 201fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 202fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void ds2760_battery_update_status(struct ds2760_device_info *di) 203fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 204fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int old_charge_status = di->charge_status; 205fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 206fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_read_status(di); 207fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 208fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN) 209fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 210fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 211fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (power_supply_am_i_supplied(&di->bat)) { 212fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->current_uA > 10000) { 213fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 214fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 215fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else if (di->current_uA < -5000) { 216fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING) 217fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_notice(di->dev, "not enough power to " 218fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "charge\n"); 219fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 220fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 221fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else if (di->current_uA < 10000 && 222fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status != POWER_SUPPLY_STATUS_FULL) { 223fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 224fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* Don't consider the battery to be full unless 225fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * we've seen the current < 10 mA at least two 226fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov * consecutive times. */ 227fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 228fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter++; 229fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 230fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->full_counter < 2) { 231fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_CHARGING; 232fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else { 233fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov unsigned char acr[2]; 234fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int acr_val; 235fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 236fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov /* acr is in units of 0.25 mAh */ 237fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov acr_val = di->full_active_uAh * 4L / 1000; 238fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 239fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov acr[0] = acr_val >> 8; 240fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov acr[1] = acr_val & 0xff; 241fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 242fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (w1_ds2760_write(di->w1_dev, acr, 243fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov DS2760_CURRENT_ACCUM_MSB, 2) < 2) 244fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_warn(di->dev, 245fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "ACR reset failed\n"); 246fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 247fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_FULL; 248fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 249fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 250fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } else { 251fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 252fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->full_counter = 0; 253fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 254fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 255fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (di->charge_status != old_charge_status) 256fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_changed(&di->bat); 257fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 258fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return; 259fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 260fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 261fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void ds2760_battery_work(struct work_struct *work) 262fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 263fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = container_of(work, 264fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info, monitor_work.work); 265fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov const int interval = HZ * 60; 266fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 267fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_dbg(di->dev, "%s\n", __FUNCTION__); 268fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 269fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_update_status(di); 270fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval); 271fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 272fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return; 273fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 274fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 275fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#define to_ds2760_device_info(x) container_of((x), struct ds2760_device_info, \ 276fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov bat); 277fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 278fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void ds2760_battery_external_power_changed(struct power_supply *psy) 279fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 280fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = to_ds2760_device_info(psy); 281fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 282fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_dbg(di->dev, "%s\n", __FUNCTION__); 283fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 284fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov cancel_delayed_work(&di->monitor_work); 285fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10); 286fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 287fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return; 288fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 289fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 290fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_get_property(struct power_supply *psy, 291fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov enum power_supply_property psp, 292fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov union power_supply_propval *val) 293fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 294fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = to_ds2760_device_info(psy); 295fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 296fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov switch (psp) { 297fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_STATUS: 298fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->charge_status; 299fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 300fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov default: 301fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 302fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 303fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 304fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_read_status(di); 305fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 306fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov switch (psp) { 307fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_VOLTAGE_NOW: 308fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->voltage_uV; 309fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 310fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CURRENT_NOW: 311fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->current_uA; 312fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 313fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 314fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->rated_capacity; 315fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 316fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_FULL: 317fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->full_active_uAh; 318fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 319fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_EMPTY: 320fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->empty_uAh; 321fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 322fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_CHARGE_NOW: 323fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->accum_current_uAh; 324fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 325fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov case POWER_SUPPLY_PROP_TEMP: 326fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov val->intval = di->temp_C; 327fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov break; 328fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov default: 329fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return -EINVAL; 330fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 331fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 332fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 333fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 334fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 335fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic enum power_supply_property ds2760_battery_props[] = { 336fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_STATUS, 337fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_VOLTAGE_NOW, 338fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CURRENT_NOW, 339fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 340fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_FULL, 341fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_EMPTY, 342fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_CHARGE_NOW, 343fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov POWER_SUPPLY_PROP_TEMP, 344fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 345fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 346fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_probe(struct platform_device *pdev) 347fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 348fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov int retval = 0; 349fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di; 350fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_platform_data *pdata; 351fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 352fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di = kzalloc(sizeof(*di), GFP_KERNEL); 353fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (!di) { 354fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov retval = -ENOMEM; 355fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto di_alloc_failed; 356fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 357fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 358fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov platform_set_drvdata(pdev, di); 359fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 360fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov pdata = pdev->dev.platform_data; 361fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->dev = &pdev->dev; 362fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->w1_dev = pdev->dev.parent; 363fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.name = pdev->dev.bus_id; 364fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.type = POWER_SUPPLY_TYPE_BATTERY; 365fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.properties = ds2760_battery_props; 366fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props); 367fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.get_property = ds2760_battery_get_property; 368fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->bat.external_power_changed = 369fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov ds2760_battery_external_power_changed; 370fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 371fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; 372fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 373fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov retval = power_supply_register(&pdev->dev, &di->bat); 374fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (retval) { 375fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov dev_err(di->dev, "failed to register battery"); 376fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto batt_failed; 377fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 378fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 379fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work); 380fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->monitor_wqueue = create_singlethread_workqueue(pdev->dev.bus_id); 381fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov if (!di->monitor_wqueue) { 382fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov retval = -ESRCH; 383fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto workqueue_failed; 384fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov } 385fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1); 386fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 387fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov goto success; 388fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 389fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovworkqueue_failed: 390fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_unregister(&di->bat); 391fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovbatt_failed: 392fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov kfree(di); 393fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovdi_alloc_failed: 394fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovsuccess: 395fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return retval; 396fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 397fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 398fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_remove(struct platform_device *pdev) 399fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 400fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = platform_get_drvdata(pdev); 401fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 402fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov cancel_rearming_delayed_workqueue(di->monitor_wqueue, 403fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov &di->monitor_work); 404fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov destroy_workqueue(di->monitor_wqueue); 405fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_unregister(&di->bat); 406fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 407fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 408fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 409fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 410fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#ifdef CONFIG_PM 411fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 412fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_suspend(struct platform_device *pdev, 413fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov pm_message_t state) 414fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 415fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = platform_get_drvdata(pdev); 416fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 417fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; 418fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 419fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 420fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 421fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 422fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int ds2760_battery_resume(struct platform_device *pdev) 423fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 424fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov struct ds2760_device_info *di = platform_get_drvdata(pdev); 425fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 426fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN; 427fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov power_supply_changed(&di->bat); 428fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 429fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov cancel_delayed_work(&di->monitor_work); 430fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ); 431fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 432fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return 0; 433fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 434fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 435fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#else 436fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 437fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#define ds2760_battery_suspend NULL 438fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#define ds2760_battery_resume NULL 439fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 440fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov#endif /* CONFIG_PM */ 441fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 442fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic struct platform_driver ds2760_battery_driver = { 443fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .driver = { 444fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .name = "ds2760-battery", 445fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov }, 446fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .probe = ds2760_battery_probe, 447fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .remove = ds2760_battery_remove, 448fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .suspend = ds2760_battery_suspend, 449fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov .resume = ds2760_battery_resume, 450fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov}; 451fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 452fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic int __init ds2760_battery_init(void) 453fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 454fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return platform_driver_register(&ds2760_battery_driver); 455fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 456fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 457fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovstatic void __exit ds2760_battery_exit(void) 458fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov{ 459fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov platform_driver_unregister(&ds2760_battery_driver); 460fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov return; 461fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov} 462fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 463fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovmodule_init(ds2760_battery_init); 464fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsovmodule_exit(ds2760_battery_exit); 465fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov 466fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_LICENSE("GPL"); 467fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, " 468fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "Matt Reimer <mreimer@vpop.net>, " 469fe0e3153acfef4864b69932cf116eb5f38f7500cAnton Vorontsov "Anton Vorontsov <cbou@mail.ru>"); 470fe0e3153acfef4864b69932cf116eb5f38f7500cAnton VorontsovMODULE_DESCRIPTION("ds2760 battery driver"); 471