10376148fSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 28c0984e5SSebastian Reichel /* 38c0984e5SSebastian Reichel * Copyright (C) ST-Ericsson SA 2012 48c0984e5SSebastian Reichel * 58c0984e5SSebastian Reichel * Battery temperature driver for AB8500 68c0984e5SSebastian Reichel * 78c0984e5SSebastian Reichel * Author: 88c0984e5SSebastian Reichel * Johan Palsson <johan.palsson@stericsson.com> 98c0984e5SSebastian Reichel * Karl Komierowski <karl.komierowski@stericsson.com> 108c0984e5SSebastian Reichel * Arun R Murthy <arun.murthy@stericsson.com> 118c0984e5SSebastian Reichel */ 128c0984e5SSebastian Reichel 138c0984e5SSebastian Reichel #include <linux/init.h> 148c0984e5SSebastian Reichel #include <linux/module.h> 158c0984e5SSebastian Reichel #include <linux/device.h> 161c1f13a0SLinus Walleij #include <linux/component.h> 178c0984e5SSebastian Reichel #include <linux/interrupt.h> 188c0984e5SSebastian Reichel #include <linux/delay.h> 198c0984e5SSebastian Reichel #include <linux/slab.h> 208c0984e5SSebastian Reichel #include <linux/platform_device.h> 218c0984e5SSebastian Reichel #include <linux/power_supply.h> 228c0984e5SSebastian Reichel #include <linux/completion.h> 238c0984e5SSebastian Reichel #include <linux/workqueue.h> 248c0984e5SSebastian Reichel #include <linux/jiffies.h> 258c0984e5SSebastian Reichel #include <linux/of.h> 268c0984e5SSebastian Reichel #include <linux/mfd/core.h> 278c0984e5SSebastian Reichel #include <linux/mfd/abx500.h> 288c0984e5SSebastian Reichel #include <linux/mfd/abx500/ab8500.h> 29*2b0e7ac0SLinus Walleij #include <linux/thermal.h> 300a8686e3SLinus Walleij #include <linux/iio/consumer.h> 31f8205474SLinus Walleij #include <linux/fixp-arith.h> 328c0984e5SSebastian Reichel 33417c0fc2SLinus Walleij #include "ab8500-bm.h" 34417c0fc2SLinus Walleij 358c0984e5SSebastian Reichel #define BTEMP_THERMAL_LOW_LIMIT -10 368c0984e5SSebastian Reichel #define BTEMP_THERMAL_MED_LIMIT 0 378c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_52 52 388c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_57 57 398c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_62 62 408c0984e5SSebastian Reichel 418c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_7UA 7 428c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_20UA 20 438c0984e5SSebastian Reichel 448c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_16UA 16 458c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_18UA 18 468c0984e5SSebastian Reichel 478c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_60UA 60 488c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_120UA 120 498c0984e5SSebastian Reichel 508c0984e5SSebastian Reichel /** 518c0984e5SSebastian Reichel * struct ab8500_btemp_interrupts - ab8500 interrupts 528c0984e5SSebastian Reichel * @name: name of the interrupt 538c0984e5SSebastian Reichel * @isr function pointer to the isr 548c0984e5SSebastian Reichel */ 558c0984e5SSebastian Reichel struct ab8500_btemp_interrupts { 568c0984e5SSebastian Reichel char *name; 578c0984e5SSebastian Reichel irqreturn_t (*isr)(int irq, void *data); 588c0984e5SSebastian Reichel }; 598c0984e5SSebastian Reichel 608c0984e5SSebastian Reichel struct ab8500_btemp_events { 618c0984e5SSebastian Reichel bool batt_rem; 628c0984e5SSebastian Reichel bool btemp_high; 638c0984e5SSebastian Reichel bool btemp_medhigh; 648c0984e5SSebastian Reichel bool btemp_lowmed; 658c0984e5SSebastian Reichel bool btemp_low; 668c0984e5SSebastian Reichel bool ac_conn; 678c0984e5SSebastian Reichel bool usb_conn; 688c0984e5SSebastian Reichel }; 698c0984e5SSebastian Reichel 708c0984e5SSebastian Reichel struct ab8500_btemp_ranges { 718c0984e5SSebastian Reichel int btemp_high_limit; 728c0984e5SSebastian Reichel int btemp_med_limit; 738c0984e5SSebastian Reichel int btemp_low_limit; 748c0984e5SSebastian Reichel }; 758c0984e5SSebastian Reichel 768c0984e5SSebastian Reichel /** 778c0984e5SSebastian Reichel * struct ab8500_btemp - ab8500 BTEMP device information 788c0984e5SSebastian Reichel * @dev: Pointer to the structure device 798c0984e5SSebastian Reichel * @node: List of AB8500 BTEMPs, hence prepared for reentrance 808c0984e5SSebastian Reichel * @curr_source: What current source we use, in uA 81c56ca24aSColin Ian King * @bat_temp: Dispatched battery temperature in degree Celsius 82c56ca24aSColin Ian King * @prev_bat_temp Last measured battery temperature in degree Celsius 838c0984e5SSebastian Reichel * @parent: Pointer to the struct ab8500 84*2b0e7ac0SLinus Walleij * @tz: Thermal zone for the battery 850a8686e3SLinus Walleij * @adc_bat_ctrl: ADC channel for the battery control 868c0984e5SSebastian Reichel * @fg: Pointer to the struct fg 878c0984e5SSebastian Reichel * @bm: Platform specific battery management information 888c0984e5SSebastian Reichel * @btemp_psy: Structure for BTEMP specific battery properties 898c0984e5SSebastian Reichel * @events: Structure for information about events triggered 908c0984e5SSebastian Reichel * @btemp_ranges: Battery temperature range structure 918c0984e5SSebastian Reichel * @btemp_wq: Work queue for measuring the temperature periodically 928c0984e5SSebastian Reichel * @btemp_periodic_work: Work for measuring the temperature periodically 938c0984e5SSebastian Reichel * @initialized: True if battery id read. 948c0984e5SSebastian Reichel */ 958c0984e5SSebastian Reichel struct ab8500_btemp { 968c0984e5SSebastian Reichel struct device *dev; 978c0984e5SSebastian Reichel struct list_head node; 988c0984e5SSebastian Reichel int curr_source; 998c0984e5SSebastian Reichel int bat_temp; 1008c0984e5SSebastian Reichel int prev_bat_temp; 1018c0984e5SSebastian Reichel struct ab8500 *parent; 102*2b0e7ac0SLinus Walleij struct thermal_zone_device *tz; 1030a8686e3SLinus Walleij struct iio_channel *bat_ctrl; 1048c0984e5SSebastian Reichel struct ab8500_fg *fg; 105484a9cc3SLinus Walleij struct ab8500_bm_data *bm; 1068c0984e5SSebastian Reichel struct power_supply *btemp_psy; 1078c0984e5SSebastian Reichel struct ab8500_btemp_events events; 1088c0984e5SSebastian Reichel struct ab8500_btemp_ranges btemp_ranges; 1098c0984e5SSebastian Reichel struct workqueue_struct *btemp_wq; 1108c0984e5SSebastian Reichel struct delayed_work btemp_periodic_work; 1118c0984e5SSebastian Reichel bool initialized; 1128c0984e5SSebastian Reichel }; 1138c0984e5SSebastian Reichel 1148c0984e5SSebastian Reichel /* BTEMP power supply properties */ 1158c0984e5SSebastian Reichel static enum power_supply_property ab8500_btemp_props[] = { 1168c0984e5SSebastian Reichel POWER_SUPPLY_PROP_PRESENT, 1178c0984e5SSebastian Reichel POWER_SUPPLY_PROP_ONLINE, 1188c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TECHNOLOGY, 1198c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TEMP, 1208c0984e5SSebastian Reichel }; 1218c0984e5SSebastian Reichel 1228c0984e5SSebastian Reichel static LIST_HEAD(ab8500_btemp_list); 1238c0984e5SSebastian Reichel 1248c0984e5SSebastian Reichel /** 1258c0984e5SSebastian Reichel * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance 1268c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1278c0984e5SSebastian Reichel * @v_batctrl: measured batctrl voltage 1288c0984e5SSebastian Reichel * @inst_curr: measured instant current 1298c0984e5SSebastian Reichel * 1308c0984e5SSebastian Reichel * This function returns the battery resistance that is 1318c0984e5SSebastian Reichel * derived from the BATCTRL voltage. 1328c0984e5SSebastian Reichel * Returns value in Ohms. 1338c0984e5SSebastian Reichel */ 1348c0984e5SSebastian Reichel static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, 1358c0984e5SSebastian Reichel int v_batctrl, int inst_curr) 1368c0984e5SSebastian Reichel { 1378c0984e5SSebastian Reichel if (is_ab8500_1p1_or_earlier(di->parent)) { 1388c0984e5SSebastian Reichel /* 1398c0984e5SSebastian Reichel * For ABB cut1.0 and 1.1 BAT_CTRL is internally 1408c0984e5SSebastian Reichel * connected to 1.8V through a 450k resistor 1418c0984e5SSebastian Reichel */ 1428c0984e5SSebastian Reichel return (450000 * (v_batctrl)) / (1800 - v_batctrl); 1438c0984e5SSebastian Reichel } 1448c0984e5SSebastian Reichel 1458c0984e5SSebastian Reichel /* 1468c0984e5SSebastian Reichel * BAT_CTRL is internally 1478c0984e5SSebastian Reichel * connected to 1.8V through a 80k resistor 1488c0984e5SSebastian Reichel */ 149d58964beSLinus Walleij return (80000 * (v_batctrl)) / (1800 - v_batctrl); 1508c0984e5SSebastian Reichel } 1518c0984e5SSebastian Reichel 1528c0984e5SSebastian Reichel /** 1538c0984e5SSebastian Reichel * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage 1548c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1558c0984e5SSebastian Reichel * 1568c0984e5SSebastian Reichel * This function returns the voltage on BATCTRL. Returns value in mV. 1578c0984e5SSebastian Reichel */ 1588c0984e5SSebastian Reichel static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) 1598c0984e5SSebastian Reichel { 1600a8686e3SLinus Walleij int vbtemp, ret; 1618c0984e5SSebastian Reichel static int prev; 1628c0984e5SSebastian Reichel 1630a8686e3SLinus Walleij ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp); 1640a8686e3SLinus Walleij if (ret < 0) { 1658c0984e5SSebastian Reichel dev_err(di->dev, 1660a8686e3SLinus Walleij "%s ADC conversion failed, using previous value", 1678c0984e5SSebastian Reichel __func__); 1688c0984e5SSebastian Reichel return prev; 1698c0984e5SSebastian Reichel } 1708c0984e5SSebastian Reichel prev = vbtemp; 1718c0984e5SSebastian Reichel return vbtemp; 1728c0984e5SSebastian Reichel } 1738c0984e5SSebastian Reichel 1748c0984e5SSebastian Reichel /** 1758c0984e5SSebastian Reichel * ab8500_btemp_get_batctrl_res() - get battery resistance 1768c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1778c0984e5SSebastian Reichel * 1788c0984e5SSebastian Reichel * This function returns the battery pack identification resistance. 1798c0984e5SSebastian Reichel * Returns value in Ohms. 1808c0984e5SSebastian Reichel */ 1818c0984e5SSebastian Reichel static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) 1828c0984e5SSebastian Reichel { 1838c0984e5SSebastian Reichel int ret; 1848c0984e5SSebastian Reichel int batctrl = 0; 1858c0984e5SSebastian Reichel int res; 1868c0984e5SSebastian Reichel int inst_curr; 1878c0984e5SSebastian Reichel int i; 1888c0984e5SSebastian Reichel 1898c0984e5SSebastian Reichel if (!di->fg) 1908c0984e5SSebastian Reichel di->fg = ab8500_fg_get(); 1918c0984e5SSebastian Reichel if (!di->fg) { 1928c0984e5SSebastian Reichel dev_err(di->dev, "No fg found\n"); 1938c0984e5SSebastian Reichel return -EINVAL; 1948c0984e5SSebastian Reichel } 1958c0984e5SSebastian Reichel 1968c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_start(di->fg); 1978c0984e5SSebastian Reichel 1988c0984e5SSebastian Reichel if (ret) { 1998c0984e5SSebastian Reichel dev_err(di->dev, "Failed to start current measurement\n"); 2008c0984e5SSebastian Reichel return ret; 2018c0984e5SSebastian Reichel } 2028c0984e5SSebastian Reichel 2038c0984e5SSebastian Reichel do { 2048c0984e5SSebastian Reichel msleep(20); 2058c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_started(di->fg)); 2068c0984e5SSebastian Reichel 2078c0984e5SSebastian Reichel i = 0; 2088c0984e5SSebastian Reichel 2098c0984e5SSebastian Reichel do { 2108c0984e5SSebastian Reichel batctrl += ab8500_btemp_read_batctrl_voltage(di); 2118c0984e5SSebastian Reichel i++; 2128c0984e5SSebastian Reichel msleep(20); 2138c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_done(di->fg)); 2148c0984e5SSebastian Reichel batctrl /= i; 2158c0984e5SSebastian Reichel 2168c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); 2178c0984e5SSebastian Reichel if (ret) { 2188c0984e5SSebastian Reichel dev_err(di->dev, "Failed to finalize current measurement\n"); 2198c0984e5SSebastian Reichel return ret; 2208c0984e5SSebastian Reichel } 2218c0984e5SSebastian Reichel 2228c0984e5SSebastian Reichel res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); 2238c0984e5SSebastian Reichel 2248c0984e5SSebastian Reichel dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", 2258c0984e5SSebastian Reichel __func__, batctrl, res, inst_curr, i); 2268c0984e5SSebastian Reichel 2278c0984e5SSebastian Reichel return res; 2288c0984e5SSebastian Reichel } 2298c0984e5SSebastian Reichel 2308c0984e5SSebastian Reichel /** 2318c0984e5SSebastian Reichel * ab8500_btemp_id() - Identify the connected battery 2328c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 2338c0984e5SSebastian Reichel * 2348c0984e5SSebastian Reichel * This function will try to identify the battery by reading the ID 2358c0984e5SSebastian Reichel * resistor. Some brands use a combined ID resistor with a NTC resistor to 2368c0984e5SSebastian Reichel * both be able to identify and to read the temperature of it. 2378c0984e5SSebastian Reichel */ 2388c0984e5SSebastian Reichel static int ab8500_btemp_id(struct ab8500_btemp *di) 2398c0984e5SSebastian Reichel { 2408c0984e5SSebastian Reichel int res; 2418c0984e5SSebastian Reichel u8 i; 2428c0984e5SSebastian Reichel 2434c4268dcSLinus Walleij di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; 2448c0984e5SSebastian Reichel 2458c0984e5SSebastian Reichel res = ab8500_btemp_get_batctrl_res(di); 2468c0984e5SSebastian Reichel if (res < 0) { 2478c0984e5SSebastian Reichel dev_err(di->dev, "%s get batctrl res failed\n", __func__); 2488c0984e5SSebastian Reichel return -ENXIO; 2498c0984e5SSebastian Reichel } 2508c0984e5SSebastian Reichel 251e5dff305SLinus Walleij if ((res <= di->bm->bat_type->resis_high) && 252e5dff305SLinus Walleij (res >= di->bm->bat_type->resis_low)) { 253d58964beSLinus Walleij dev_info(di->dev, "Battery detected on BATTEMP" 2548c0984e5SSebastian Reichel " low %d < res %d < high: %d" 2558c0984e5SSebastian Reichel " index: %d\n", 256e5dff305SLinus Walleij di->bm->bat_type->resis_low, res, 257e5dff305SLinus Walleij di->bm->bat_type->resis_high, i); 258e5dff305SLinus Walleij } else { 2598c0984e5SSebastian Reichel dev_warn(di->dev, "Battery identified as unknown" 2608c0984e5SSebastian Reichel ", resistance %d Ohm\n", res); 2618c0984e5SSebastian Reichel return -ENXIO; 2628c0984e5SSebastian Reichel } 2638c0984e5SSebastian Reichel 264e5dff305SLinus Walleij return 0; 2658c0984e5SSebastian Reichel } 2668c0984e5SSebastian Reichel 2678c0984e5SSebastian Reichel /** 2688c0984e5SSebastian Reichel * ab8500_btemp_periodic_work() - Measuring the temperature periodically 2698c0984e5SSebastian Reichel * @work: pointer to the work_struct structure 2708c0984e5SSebastian Reichel * 2718c0984e5SSebastian Reichel * Work function for measuring the temperature periodically 2728c0984e5SSebastian Reichel */ 2738c0984e5SSebastian Reichel static void ab8500_btemp_periodic_work(struct work_struct *work) 2748c0984e5SSebastian Reichel { 2758c0984e5SSebastian Reichel int interval; 2768c0984e5SSebastian Reichel int bat_temp; 2778c0984e5SSebastian Reichel struct ab8500_btemp *di = container_of(work, 2788c0984e5SSebastian Reichel struct ab8500_btemp, btemp_periodic_work.work); 279*2b0e7ac0SLinus Walleij /* Assume 25 degrees celsius as start temperature */ 280*2b0e7ac0SLinus Walleij static int prev = 25; 281*2b0e7ac0SLinus Walleij int ret; 2828c0984e5SSebastian Reichel 2838c0984e5SSebastian Reichel if (!di->initialized) { 2848c0984e5SSebastian Reichel /* Identify the battery */ 2858c0984e5SSebastian Reichel if (ab8500_btemp_id(di) < 0) 2868c0984e5SSebastian Reichel dev_warn(di->dev, "failed to identify the battery\n"); 2878c0984e5SSebastian Reichel } 2888c0984e5SSebastian Reichel 289*2b0e7ac0SLinus Walleij /* Failover if a reading is erroneous, use last meausurement */ 290*2b0e7ac0SLinus Walleij ret = thermal_zone_get_temp(di->tz, &bat_temp); 291*2b0e7ac0SLinus Walleij if (ret) { 292*2b0e7ac0SLinus Walleij dev_err(di->dev, "error reading temperature\n"); 293*2b0e7ac0SLinus Walleij bat_temp = prev; 294*2b0e7ac0SLinus Walleij } else { 295*2b0e7ac0SLinus Walleij /* Convert from millicentigrades to centigrades */ 296*2b0e7ac0SLinus Walleij bat_temp /= 1000; 297*2b0e7ac0SLinus Walleij prev = bat_temp; 298*2b0e7ac0SLinus Walleij } 299*2b0e7ac0SLinus Walleij 3008c0984e5SSebastian Reichel /* 3018c0984e5SSebastian Reichel * Filter battery temperature. 3028c0984e5SSebastian Reichel * Allow direct updates on temperature only if two samples result in 3038c0984e5SSebastian Reichel * same temperature. Else only allow 1 degree change from previous 3048c0984e5SSebastian Reichel * reported value in the direction of the new measurement. 3058c0984e5SSebastian Reichel */ 3068c0984e5SSebastian Reichel if ((bat_temp == di->prev_bat_temp) || !di->initialized) { 3078c0984e5SSebastian Reichel if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { 3088c0984e5SSebastian Reichel di->initialized = true; 3098c0984e5SSebastian Reichel di->bat_temp = bat_temp; 3108c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3118c0984e5SSebastian Reichel } 3128c0984e5SSebastian Reichel } else if (bat_temp < di->prev_bat_temp) { 3138c0984e5SSebastian Reichel di->bat_temp--; 3148c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3158c0984e5SSebastian Reichel } else if (bat_temp > di->prev_bat_temp) { 3168c0984e5SSebastian Reichel di->bat_temp++; 3178c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3188c0984e5SSebastian Reichel } 3198c0984e5SSebastian Reichel di->prev_bat_temp = bat_temp; 3208c0984e5SSebastian Reichel 3218c0984e5SSebastian Reichel if (di->events.ac_conn || di->events.usb_conn) 3228c0984e5SSebastian Reichel interval = di->bm->temp_interval_chg; 3238c0984e5SSebastian Reichel else 3248c0984e5SSebastian Reichel interval = di->bm->temp_interval_nochg; 3258c0984e5SSebastian Reichel 3268c0984e5SSebastian Reichel /* Schedule a new measurement */ 3278c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, 3288c0984e5SSebastian Reichel &di->btemp_periodic_work, 3298c0984e5SSebastian Reichel round_jiffies(interval * HZ)); 3308c0984e5SSebastian Reichel } 3318c0984e5SSebastian Reichel 3328c0984e5SSebastian Reichel /** 3338c0984e5SSebastian Reichel * ab8500_btemp_batctrlindb_handler() - battery removal detected 3348c0984e5SSebastian Reichel * @irq: interrupt number 3358c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 3368c0984e5SSebastian Reichel * 3378c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 3388c0984e5SSebastian Reichel */ 3398c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) 3408c0984e5SSebastian Reichel { 3418c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 3428c0984e5SSebastian Reichel dev_err(di->dev, "Battery removal detected!\n"); 3438c0984e5SSebastian Reichel 3448c0984e5SSebastian Reichel di->events.batt_rem = true; 3458c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3468c0984e5SSebastian Reichel 3478c0984e5SSebastian Reichel return IRQ_HANDLED; 3488c0984e5SSebastian Reichel } 3498c0984e5SSebastian Reichel 3508c0984e5SSebastian Reichel /** 3518c0984e5SSebastian Reichel * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees 3528c0984e5SSebastian Reichel * @irq: interrupt number 3538c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 3548c0984e5SSebastian Reichel * 3558c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 3568c0984e5SSebastian Reichel */ 3578c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) 3588c0984e5SSebastian Reichel { 3598c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 3608c0984e5SSebastian Reichel 3618c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) { 3628c0984e5SSebastian Reichel dev_dbg(di->dev, "Ignore false btemp low irq" 3638c0984e5SSebastian Reichel " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); 3648c0984e5SSebastian Reichel } else { 3658c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); 3668c0984e5SSebastian Reichel 3678c0984e5SSebastian Reichel di->events.btemp_low = true; 3688c0984e5SSebastian Reichel di->events.btemp_high = false; 3698c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 3708c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 3718c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3728c0984e5SSebastian Reichel } 3738c0984e5SSebastian Reichel 3748c0984e5SSebastian Reichel return IRQ_HANDLED; 3758c0984e5SSebastian Reichel } 3768c0984e5SSebastian Reichel 3778c0984e5SSebastian Reichel /** 3788c0984e5SSebastian Reichel * ab8500_btemp_temphigh_handler() - battery temp higher than max temp 3798c0984e5SSebastian Reichel * @irq: interrupt number 3808c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 3818c0984e5SSebastian Reichel * 3828c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 3838c0984e5SSebastian Reichel */ 3848c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) 3858c0984e5SSebastian Reichel { 3868c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 3878c0984e5SSebastian Reichel 3888c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); 3898c0984e5SSebastian Reichel 3908c0984e5SSebastian Reichel di->events.btemp_high = true; 3918c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 3928c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 3938c0984e5SSebastian Reichel di->events.btemp_low = false; 3948c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3958c0984e5SSebastian Reichel 3968c0984e5SSebastian Reichel return IRQ_HANDLED; 3978c0984e5SSebastian Reichel } 3988c0984e5SSebastian Reichel 3998c0984e5SSebastian Reichel /** 4008c0984e5SSebastian Reichel * ab8500_btemp_lowmed_handler() - battery temp between low and medium 4018c0984e5SSebastian Reichel * @irq: interrupt number 4028c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 4038c0984e5SSebastian Reichel * 4048c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 4058c0984e5SSebastian Reichel */ 4068c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) 4078c0984e5SSebastian Reichel { 4088c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4098c0984e5SSebastian Reichel 4108c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between low and medium\n"); 4118c0984e5SSebastian Reichel 4128c0984e5SSebastian Reichel di->events.btemp_lowmed = true; 4138c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 4148c0984e5SSebastian Reichel di->events.btemp_high = false; 4158c0984e5SSebastian Reichel di->events.btemp_low = false; 4168c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4178c0984e5SSebastian Reichel 4188c0984e5SSebastian Reichel return IRQ_HANDLED; 4198c0984e5SSebastian Reichel } 4208c0984e5SSebastian Reichel 4218c0984e5SSebastian Reichel /** 4228c0984e5SSebastian Reichel * ab8500_btemp_medhigh_handler() - battery temp between medium and high 4238c0984e5SSebastian Reichel * @irq: interrupt number 4248c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 4258c0984e5SSebastian Reichel * 4268c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 4278c0984e5SSebastian Reichel */ 4288c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) 4298c0984e5SSebastian Reichel { 4308c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4318c0984e5SSebastian Reichel 4328c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between medium and high\n"); 4338c0984e5SSebastian Reichel 4348c0984e5SSebastian Reichel di->events.btemp_medhigh = true; 4358c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 4368c0984e5SSebastian Reichel di->events.btemp_high = false; 4378c0984e5SSebastian Reichel di->events.btemp_low = false; 4388c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4398c0984e5SSebastian Reichel 4408c0984e5SSebastian Reichel return IRQ_HANDLED; 4418c0984e5SSebastian Reichel } 4428c0984e5SSebastian Reichel 4438c0984e5SSebastian Reichel /** 4448c0984e5SSebastian Reichel * ab8500_btemp_periodic() - Periodic temperature measurements 4458c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 4468c0984e5SSebastian Reichel * @enable: enable or disable periodic temperature measurements 4478c0984e5SSebastian Reichel * 4488c0984e5SSebastian Reichel * Starts of stops periodic temperature measurements. Periodic measurements 4498c0984e5SSebastian Reichel * should only be done when a charger is connected. 4508c0984e5SSebastian Reichel */ 4518c0984e5SSebastian Reichel static void ab8500_btemp_periodic(struct ab8500_btemp *di, 4528c0984e5SSebastian Reichel bool enable) 4538c0984e5SSebastian Reichel { 4548c0984e5SSebastian Reichel dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", 4558c0984e5SSebastian Reichel enable); 4568c0984e5SSebastian Reichel /* 4578c0984e5SSebastian Reichel * Make sure a new measurement is done directly by cancelling 4588c0984e5SSebastian Reichel * any pending work 4598c0984e5SSebastian Reichel */ 4608c0984e5SSebastian Reichel cancel_delayed_work_sync(&di->btemp_periodic_work); 4618c0984e5SSebastian Reichel 4628c0984e5SSebastian Reichel if (enable) 4638c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); 4648c0984e5SSebastian Reichel } 4658c0984e5SSebastian Reichel 4668c0984e5SSebastian Reichel /** 4678c0984e5SSebastian Reichel * ab8500_btemp_get_temp() - get battery temperature 4688c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 4698c0984e5SSebastian Reichel * 4708c0984e5SSebastian Reichel * Returns battery temperature 4718c0984e5SSebastian Reichel */ 472417c0fc2SLinus Walleij static int ab8500_btemp_get_temp(struct ab8500_btemp *di) 4738c0984e5SSebastian Reichel { 4748c0984e5SSebastian Reichel int temp = 0; 4758c0984e5SSebastian Reichel 4768c0984e5SSebastian Reichel /* 4778c0984e5SSebastian Reichel * The BTEMP events are not reliabe on AB8500 cut3.3 4788c0984e5SSebastian Reichel * and prior versions 4798c0984e5SSebastian Reichel */ 4808c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) { 4818c0984e5SSebastian Reichel temp = di->bat_temp * 10; 4828c0984e5SSebastian Reichel } else { 4838c0984e5SSebastian Reichel if (di->events.btemp_low) { 4848c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_low_limit) 4858c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_low_limit * 10; 4868c0984e5SSebastian Reichel else 4878c0984e5SSebastian Reichel temp = di->bat_temp * 10; 4888c0984e5SSebastian Reichel } else if (di->events.btemp_high) { 4898c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_high_limit) 4908c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_high_limit * 10; 4918c0984e5SSebastian Reichel else 4928c0984e5SSebastian Reichel temp = di->bat_temp * 10; 4938c0984e5SSebastian Reichel } else if (di->events.btemp_lowmed) { 4948c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_med_limit) 4958c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10; 4968c0984e5SSebastian Reichel else 4978c0984e5SSebastian Reichel temp = di->bat_temp * 10; 4988c0984e5SSebastian Reichel } else if (di->events.btemp_medhigh) { 4998c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_med_limit) 5008c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10; 5018c0984e5SSebastian Reichel else 5028c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5038c0984e5SSebastian Reichel } else 5048c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5058c0984e5SSebastian Reichel } 5068c0984e5SSebastian Reichel return temp; 5078c0984e5SSebastian Reichel } 5088c0984e5SSebastian Reichel 5098c0984e5SSebastian Reichel /** 5108c0984e5SSebastian Reichel * ab8500_btemp_get_property() - get the btemp properties 5118c0984e5SSebastian Reichel * @psy: pointer to the power_supply structure 5128c0984e5SSebastian Reichel * @psp: pointer to the power_supply_property structure 5138c0984e5SSebastian Reichel * @val: pointer to the power_supply_propval union 5148c0984e5SSebastian Reichel * 5158c0984e5SSebastian Reichel * This function gets called when an application tries to get the btemp 5168c0984e5SSebastian Reichel * properties by reading the sysfs files. 5178c0984e5SSebastian Reichel * online: presence of the battery 5188c0984e5SSebastian Reichel * present: presence of the battery 5198c0984e5SSebastian Reichel * technology: battery technology 5208c0984e5SSebastian Reichel * temp: battery temperature 5218c0984e5SSebastian Reichel * Returns error code in case of failure else 0(on success) 5228c0984e5SSebastian Reichel */ 5238c0984e5SSebastian Reichel static int ab8500_btemp_get_property(struct power_supply *psy, 5248c0984e5SSebastian Reichel enum power_supply_property psp, 5258c0984e5SSebastian Reichel union power_supply_propval *val) 5268c0984e5SSebastian Reichel { 5278c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy); 5288c0984e5SSebastian Reichel 5298c0984e5SSebastian Reichel switch (psp) { 5308c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT: 5318c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_ONLINE: 5328c0984e5SSebastian Reichel if (di->events.batt_rem) 5338c0984e5SSebastian Reichel val->intval = 0; 5348c0984e5SSebastian Reichel else 5358c0984e5SSebastian Reichel val->intval = 1; 5368c0984e5SSebastian Reichel break; 5378c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TECHNOLOGY: 53825fd3303SLinus Walleij if (di->bm->bi) 53925fd3303SLinus Walleij val->intval = di->bm->bi->technology; 54025fd3303SLinus Walleij else 54125fd3303SLinus Walleij val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 5428c0984e5SSebastian Reichel break; 5438c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TEMP: 5448c0984e5SSebastian Reichel val->intval = ab8500_btemp_get_temp(di); 5458c0984e5SSebastian Reichel break; 5468c0984e5SSebastian Reichel default: 5478c0984e5SSebastian Reichel return -EINVAL; 5488c0984e5SSebastian Reichel } 5498c0984e5SSebastian Reichel return 0; 5508c0984e5SSebastian Reichel } 5518c0984e5SSebastian Reichel 5528c0984e5SSebastian Reichel static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) 5538c0984e5SSebastian Reichel { 5548c0984e5SSebastian Reichel struct power_supply *psy; 5558c0984e5SSebastian Reichel struct power_supply *ext = dev_get_drvdata(dev); 5568c0984e5SSebastian Reichel const char **supplicants = (const char **)ext->supplied_to; 5578c0984e5SSebastian Reichel struct ab8500_btemp *di; 5588c0984e5SSebastian Reichel union power_supply_propval ret; 5598c0984e5SSebastian Reichel int j; 5608c0984e5SSebastian Reichel 5618c0984e5SSebastian Reichel psy = (struct power_supply *)data; 5628c0984e5SSebastian Reichel di = power_supply_get_drvdata(psy); 5638c0984e5SSebastian Reichel 5648c0984e5SSebastian Reichel /* 5658c0984e5SSebastian Reichel * For all psy where the name of your driver 5668c0984e5SSebastian Reichel * appears in any supplied_to 5678c0984e5SSebastian Reichel */ 5688c0984e5SSebastian Reichel j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 5698c0984e5SSebastian Reichel if (j < 0) 5708c0984e5SSebastian Reichel return 0; 5718c0984e5SSebastian Reichel 5728c0984e5SSebastian Reichel /* Go through all properties for the psy */ 5738c0984e5SSebastian Reichel for (j = 0; j < ext->desc->num_properties; j++) { 5748c0984e5SSebastian Reichel enum power_supply_property prop; 5758c0984e5SSebastian Reichel prop = ext->desc->properties[j]; 5768c0984e5SSebastian Reichel 5778c0984e5SSebastian Reichel if (power_supply_get_property(ext, prop, &ret)) 5788c0984e5SSebastian Reichel continue; 5798c0984e5SSebastian Reichel 5808c0984e5SSebastian Reichel switch (prop) { 5818c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT: 5828c0984e5SSebastian Reichel switch (ext->desc->type) { 5838c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_MAINS: 5848c0984e5SSebastian Reichel /* AC disconnected */ 5858c0984e5SSebastian Reichel if (!ret.intval && di->events.ac_conn) { 5868c0984e5SSebastian Reichel di->events.ac_conn = false; 5878c0984e5SSebastian Reichel } 5888c0984e5SSebastian Reichel /* AC connected */ 5898c0984e5SSebastian Reichel else if (ret.intval && !di->events.ac_conn) { 5908c0984e5SSebastian Reichel di->events.ac_conn = true; 5918c0984e5SSebastian Reichel if (!di->events.usb_conn) 5928c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 5938c0984e5SSebastian Reichel } 5948c0984e5SSebastian Reichel break; 5958c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_USB: 5968c0984e5SSebastian Reichel /* USB disconnected */ 5978c0984e5SSebastian Reichel if (!ret.intval && di->events.usb_conn) { 5988c0984e5SSebastian Reichel di->events.usb_conn = false; 5998c0984e5SSebastian Reichel } 6008c0984e5SSebastian Reichel /* USB connected */ 6018c0984e5SSebastian Reichel else if (ret.intval && !di->events.usb_conn) { 6028c0984e5SSebastian Reichel di->events.usb_conn = true; 6038c0984e5SSebastian Reichel if (!di->events.ac_conn) 6048c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 6058c0984e5SSebastian Reichel } 6068c0984e5SSebastian Reichel break; 6078c0984e5SSebastian Reichel default: 6088c0984e5SSebastian Reichel break; 6098c0984e5SSebastian Reichel } 6108c0984e5SSebastian Reichel break; 6118c0984e5SSebastian Reichel default: 6128c0984e5SSebastian Reichel break; 6138c0984e5SSebastian Reichel } 6148c0984e5SSebastian Reichel } 6158c0984e5SSebastian Reichel return 0; 6168c0984e5SSebastian Reichel } 6178c0984e5SSebastian Reichel 6188c0984e5SSebastian Reichel /** 6198c0984e5SSebastian Reichel * ab8500_btemp_external_power_changed() - callback for power supply changes 6208c0984e5SSebastian Reichel * @psy: pointer to the structure power_supply 6218c0984e5SSebastian Reichel * 6228c0984e5SSebastian Reichel * This function is pointing to the function pointer external_power_changed 6238c0984e5SSebastian Reichel * of the structure power_supply. 6248c0984e5SSebastian Reichel * This function gets executed when there is a change in the external power 6258c0984e5SSebastian Reichel * supply to the btemp. 6268c0984e5SSebastian Reichel */ 6278c0984e5SSebastian Reichel static void ab8500_btemp_external_power_changed(struct power_supply *psy) 6288c0984e5SSebastian Reichel { 6298c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy); 6308c0984e5SSebastian Reichel 6318c0984e5SSebastian Reichel class_for_each_device(power_supply_class, NULL, 6328c0984e5SSebastian Reichel di->btemp_psy, ab8500_btemp_get_ext_psy_data); 6338c0984e5SSebastian Reichel } 6348c0984e5SSebastian Reichel 6358c0984e5SSebastian Reichel /* ab8500 btemp driver interrupts and their respective isr */ 6368c0984e5SSebastian Reichel static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { 6378c0984e5SSebastian Reichel {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, 6388c0984e5SSebastian Reichel {"BTEMP_LOW", ab8500_btemp_templow_handler}, 6398c0984e5SSebastian Reichel {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, 6408c0984e5SSebastian Reichel {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, 6418c0984e5SSebastian Reichel {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, 6428c0984e5SSebastian Reichel }; 6438c0984e5SSebastian Reichel 644f8efa0a8SLinus Walleij static int __maybe_unused ab8500_btemp_resume(struct device *dev) 6458c0984e5SSebastian Reichel { 646f8efa0a8SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 6478c0984e5SSebastian Reichel 6488c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 6498c0984e5SSebastian Reichel 6508c0984e5SSebastian Reichel return 0; 6518c0984e5SSebastian Reichel } 6528c0984e5SSebastian Reichel 653f8efa0a8SLinus Walleij static int __maybe_unused ab8500_btemp_suspend(struct device *dev) 6548c0984e5SSebastian Reichel { 655f8efa0a8SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 6568c0984e5SSebastian Reichel 6578c0984e5SSebastian Reichel ab8500_btemp_periodic(di, false); 6588c0984e5SSebastian Reichel 6598c0984e5SSebastian Reichel return 0; 6608c0984e5SSebastian Reichel } 6618c0984e5SSebastian Reichel 6628c0984e5SSebastian Reichel static char *supply_interface[] = { 6638c0984e5SSebastian Reichel "ab8500_chargalg", 6648c0984e5SSebastian Reichel "ab8500_fg", 6658c0984e5SSebastian Reichel }; 6668c0984e5SSebastian Reichel 6678c0984e5SSebastian Reichel static const struct power_supply_desc ab8500_btemp_desc = { 6688c0984e5SSebastian Reichel .name = "ab8500_btemp", 6698c0984e5SSebastian Reichel .type = POWER_SUPPLY_TYPE_BATTERY, 6708c0984e5SSebastian Reichel .properties = ab8500_btemp_props, 6718c0984e5SSebastian Reichel .num_properties = ARRAY_SIZE(ab8500_btemp_props), 6728c0984e5SSebastian Reichel .get_property = ab8500_btemp_get_property, 6738c0984e5SSebastian Reichel .external_power_changed = ab8500_btemp_external_power_changed, 6748c0984e5SSebastian Reichel }; 6758c0984e5SSebastian Reichel 6761c1f13a0SLinus Walleij static int ab8500_btemp_bind(struct device *dev, struct device *master, 6771c1f13a0SLinus Walleij void *data) 6781c1f13a0SLinus Walleij { 6791c1f13a0SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 6801c1f13a0SLinus Walleij 6811c1f13a0SLinus Walleij /* Create a work queue for the btemp */ 6821c1f13a0SLinus Walleij di->btemp_wq = 6831c1f13a0SLinus Walleij alloc_workqueue("ab8500_btemp_wq", WQ_MEM_RECLAIM, 0); 6841c1f13a0SLinus Walleij if (di->btemp_wq == NULL) { 6851c1f13a0SLinus Walleij dev_err(dev, "failed to create work queue\n"); 6861c1f13a0SLinus Walleij return -ENOMEM; 6871c1f13a0SLinus Walleij } 6881c1f13a0SLinus Walleij 6891c1f13a0SLinus Walleij /* Kick off periodic temperature measurements */ 6901c1f13a0SLinus Walleij ab8500_btemp_periodic(di, true); 6911c1f13a0SLinus Walleij 6921c1f13a0SLinus Walleij return 0; 6931c1f13a0SLinus Walleij } 6941c1f13a0SLinus Walleij 6951c1f13a0SLinus Walleij static void ab8500_btemp_unbind(struct device *dev, struct device *master, 6961c1f13a0SLinus Walleij void *data) 6971c1f13a0SLinus Walleij { 6981c1f13a0SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 6991c1f13a0SLinus Walleij 7001c1f13a0SLinus Walleij /* Delete the work queue */ 7011c1f13a0SLinus Walleij destroy_workqueue(di->btemp_wq); 7021c1f13a0SLinus Walleij flush_scheduled_work(); 7031c1f13a0SLinus Walleij } 7041c1f13a0SLinus Walleij 7051c1f13a0SLinus Walleij static const struct component_ops ab8500_btemp_component_ops = { 7061c1f13a0SLinus Walleij .bind = ab8500_btemp_bind, 7071c1f13a0SLinus Walleij .unbind = ab8500_btemp_unbind, 7081c1f13a0SLinus Walleij }; 7091c1f13a0SLinus Walleij 7108c0984e5SSebastian Reichel static int ab8500_btemp_probe(struct platform_device *pdev) 7118c0984e5SSebastian Reichel { 7128c0984e5SSebastian Reichel struct power_supply_config psy_cfg = {}; 713ad89cb5fSLinus Walleij struct device *dev = &pdev->dev; 7148c0984e5SSebastian Reichel struct ab8500_btemp *di; 7158c0984e5SSebastian Reichel int irq, i, ret = 0; 7168c0984e5SSebastian Reichel u8 val; 7178c0984e5SSebastian Reichel 718ad89cb5fSLinus Walleij di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); 719ad89cb5fSLinus Walleij if (!di) 7208c0984e5SSebastian Reichel return -ENOMEM; 7218c0984e5SSebastian Reichel 722417c0fc2SLinus Walleij di->bm = &ab8500_bm_data; 7238c0984e5SSebastian Reichel 7248c0984e5SSebastian Reichel /* get parent data */ 725ad89cb5fSLinus Walleij di->dev = dev; 7268c0984e5SSebastian Reichel di->parent = dev_get_drvdata(pdev->dev.parent); 7270a8686e3SLinus Walleij 728*2b0e7ac0SLinus Walleij /* Get thermal zone and ADC */ 729*2b0e7ac0SLinus Walleij di->tz = thermal_zone_get_zone_by_name("battery-thermal"); 730*2b0e7ac0SLinus Walleij if (IS_ERR(di->tz)) { 731*2b0e7ac0SLinus Walleij return dev_err_probe(dev, PTR_ERR(di->tz), 732*2b0e7ac0SLinus Walleij "failed to get battery thermal zone\n"); 7330a8686e3SLinus Walleij } 734ad89cb5fSLinus Walleij di->bat_ctrl = devm_iio_channel_get(dev, "bat_ctrl"); 7350a8686e3SLinus Walleij if (IS_ERR(di->bat_ctrl)) { 73636f1de0dSLinus Walleij ret = dev_err_probe(dev, PTR_ERR(di->bat_ctrl), 73736f1de0dSLinus Walleij "failed to get BAT CTRL ADC channel\n"); 73836f1de0dSLinus Walleij return ret; 7390a8686e3SLinus Walleij } 7408c0984e5SSebastian Reichel 7418c0984e5SSebastian Reichel di->initialized = false; 7428c0984e5SSebastian Reichel 7438c0984e5SSebastian Reichel psy_cfg.supplied_to = supply_interface; 7448c0984e5SSebastian Reichel psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 7458c0984e5SSebastian Reichel psy_cfg.drv_data = di; 7468c0984e5SSebastian Reichel 7478c0984e5SSebastian Reichel /* Init work for measuring temperature periodically */ 7488c0984e5SSebastian Reichel INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, 7498c0984e5SSebastian Reichel ab8500_btemp_periodic_work); 7508c0984e5SSebastian Reichel 7518c0984e5SSebastian Reichel /* Set BTEMP thermal limits. Low and Med are fixed */ 7528c0984e5SSebastian Reichel di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; 7538c0984e5SSebastian Reichel di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; 7548c0984e5SSebastian Reichel 755ad89cb5fSLinus Walleij ret = abx500_get_register_interruptible(dev, AB8500_CHARGER, 7568c0984e5SSebastian Reichel AB8500_BTEMP_HIGH_TH, &val); 7578c0984e5SSebastian Reichel if (ret < 0) { 758ad89cb5fSLinus Walleij dev_err(dev, "%s ab8500 read failed\n", __func__); 7591c1f13a0SLinus Walleij return ret; 7608c0984e5SSebastian Reichel } 7618c0984e5SSebastian Reichel switch (val) { 7628c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_0: 7638c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_1: 7648c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 7658c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_57; 7668c0984e5SSebastian Reichel break; 7678c0984e5SSebastian Reichel case BTEMP_HIGH_TH_52: 7688c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 7698c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_52; 7708c0984e5SSebastian Reichel break; 7718c0984e5SSebastian Reichel case BTEMP_HIGH_TH_62: 7728c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 7738c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_62; 7748c0984e5SSebastian Reichel break; 7758c0984e5SSebastian Reichel } 7768c0984e5SSebastian Reichel 7778c0984e5SSebastian Reichel /* Register BTEMP power supply class */ 7781c1f13a0SLinus Walleij di->btemp_psy = devm_power_supply_register(dev, &ab8500_btemp_desc, 7798c0984e5SSebastian Reichel &psy_cfg); 7808c0984e5SSebastian Reichel if (IS_ERR(di->btemp_psy)) { 781ad89cb5fSLinus Walleij dev_err(dev, "failed to register BTEMP psy\n"); 7821c1f13a0SLinus Walleij return PTR_ERR(di->btemp_psy); 7838c0984e5SSebastian Reichel } 7848c0984e5SSebastian Reichel 7858c0984e5SSebastian Reichel /* Register interrupts */ 7868c0984e5SSebastian Reichel for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { 7878c0984e5SSebastian Reichel irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); 7881c1f13a0SLinus Walleij if (irq < 0) 7891c1f13a0SLinus Walleij return irq; 790b10e9700SKrzysztof Kozlowski 7911c1f13a0SLinus Walleij ret = devm_request_threaded_irq(dev, irq, NULL, 7921c1f13a0SLinus Walleij ab8500_btemp_irq[i].isr, 793df12470cSTian Tao IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, 7948c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, di); 7958c0984e5SSebastian Reichel 7968c0984e5SSebastian Reichel if (ret) { 797ad89cb5fSLinus Walleij dev_err(dev, "failed to request %s IRQ %d: %d\n" 7988c0984e5SSebastian Reichel , ab8500_btemp_irq[i].name, irq, ret); 7991c1f13a0SLinus Walleij return ret; 8008c0984e5SSebastian Reichel } 801ad89cb5fSLinus Walleij dev_dbg(dev, "Requested %s IRQ %d: %d\n", 8028c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, irq, ret); 8038c0984e5SSebastian Reichel } 8048c0984e5SSebastian Reichel 8058c0984e5SSebastian Reichel platform_set_drvdata(pdev, di); 8068c0984e5SSebastian Reichel 8078c0984e5SSebastian Reichel list_add_tail(&di->node, &ab8500_btemp_list); 8088c0984e5SSebastian Reichel 8091c1f13a0SLinus Walleij return component_add(dev, &ab8500_btemp_component_ops); 8108c0984e5SSebastian Reichel } 811ccc023a5SKrzysztof Kozlowski 8121c1f13a0SLinus Walleij static int ab8500_btemp_remove(struct platform_device *pdev) 8131c1f13a0SLinus Walleij { 8141c1f13a0SLinus Walleij component_del(&pdev->dev, &ab8500_btemp_component_ops); 8151c1f13a0SLinus Walleij 8161c1f13a0SLinus Walleij return 0; 8178c0984e5SSebastian Reichel } 8188c0984e5SSebastian Reichel 819f8efa0a8SLinus Walleij static SIMPLE_DEV_PM_OPS(ab8500_btemp_pm_ops, ab8500_btemp_suspend, ab8500_btemp_resume); 820f8efa0a8SLinus Walleij 8218c0984e5SSebastian Reichel static const struct of_device_id ab8500_btemp_match[] = { 8228c0984e5SSebastian Reichel { .compatible = "stericsson,ab8500-btemp", }, 8238c0984e5SSebastian Reichel { }, 8248c0984e5SSebastian Reichel }; 825dfe52db1SZou Wei MODULE_DEVICE_TABLE(of, ab8500_btemp_match); 8268c0984e5SSebastian Reichel 8271c1f13a0SLinus Walleij struct platform_driver ab8500_btemp_driver = { 8288c0984e5SSebastian Reichel .probe = ab8500_btemp_probe, 8298c0984e5SSebastian Reichel .remove = ab8500_btemp_remove, 8308c0984e5SSebastian Reichel .driver = { 8318c0984e5SSebastian Reichel .name = "ab8500-btemp", 8328c0984e5SSebastian Reichel .of_match_table = ab8500_btemp_match, 833f8efa0a8SLinus Walleij .pm = &ab8500_btemp_pm_ops, 8348c0984e5SSebastian Reichel }, 8358c0984e5SSebastian Reichel }; 8368c0984e5SSebastian Reichel MODULE_LICENSE("GPL v2"); 8378c0984e5SSebastian Reichel MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); 8388c0984e5SSebastian Reichel MODULE_ALIAS("platform:ab8500-btemp"); 8398c0984e5SSebastian Reichel MODULE_DESCRIPTION("AB8500 battery temperature driver"); 840