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> 290a8686e3SLinus Walleij #include <linux/iio/consumer.h> 30f8205474SLinus Walleij #include <linux/fixp-arith.h> 318c0984e5SSebastian Reichel 32417c0fc2SLinus Walleij #include "ab8500-bm.h" 33417c0fc2SLinus Walleij 348c0984e5SSebastian Reichel #define VTVOUT_V 1800 358c0984e5SSebastian Reichel 368c0984e5SSebastian Reichel #define BTEMP_THERMAL_LOW_LIMIT -10 378c0984e5SSebastian Reichel #define BTEMP_THERMAL_MED_LIMIT 0 388c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_52 52 398c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_57 57 408c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_62 62 418c0984e5SSebastian Reichel 428c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_7UA 7 438c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_20UA 20 448c0984e5SSebastian Reichel 458c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_16UA 16 468c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_18UA 18 478c0984e5SSebastian Reichel 488c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_60UA 60 498c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_120UA 120 508c0984e5SSebastian Reichel 518c0984e5SSebastian Reichel /** 528c0984e5SSebastian Reichel * struct ab8500_btemp_interrupts - ab8500 interrupts 538c0984e5SSebastian Reichel * @name: name of the interrupt 548c0984e5SSebastian Reichel * @isr function pointer to the isr 558c0984e5SSebastian Reichel */ 568c0984e5SSebastian Reichel struct ab8500_btemp_interrupts { 578c0984e5SSebastian Reichel char *name; 588c0984e5SSebastian Reichel irqreturn_t (*isr)(int irq, void *data); 598c0984e5SSebastian Reichel }; 608c0984e5SSebastian Reichel 618c0984e5SSebastian Reichel struct ab8500_btemp_events { 628c0984e5SSebastian Reichel bool batt_rem; 638c0984e5SSebastian Reichel bool btemp_high; 648c0984e5SSebastian Reichel bool btemp_medhigh; 658c0984e5SSebastian Reichel bool btemp_lowmed; 668c0984e5SSebastian Reichel bool btemp_low; 678c0984e5SSebastian Reichel bool ac_conn; 688c0984e5SSebastian Reichel bool usb_conn; 698c0984e5SSebastian Reichel }; 708c0984e5SSebastian Reichel 718c0984e5SSebastian Reichel struct ab8500_btemp_ranges { 728c0984e5SSebastian Reichel int btemp_high_limit; 738c0984e5SSebastian Reichel int btemp_med_limit; 748c0984e5SSebastian Reichel int btemp_low_limit; 758c0984e5SSebastian Reichel }; 768c0984e5SSebastian Reichel 778c0984e5SSebastian Reichel /** 788c0984e5SSebastian Reichel * struct ab8500_btemp - ab8500 BTEMP device information 798c0984e5SSebastian Reichel * @dev: Pointer to the structure device 808c0984e5SSebastian Reichel * @node: List of AB8500 BTEMPs, hence prepared for reentrance 818c0984e5SSebastian Reichel * @curr_source: What current source we use, in uA 82c56ca24aSColin Ian King * @bat_temp: Dispatched battery temperature in degree Celsius 83c56ca24aSColin Ian King * @prev_bat_temp Last measured battery temperature in degree Celsius 848c0984e5SSebastian Reichel * @parent: Pointer to the struct ab8500 850a8686e3SLinus Walleij * @adc_btemp_ball: ADC channel for the battery ball temperature 860a8686e3SLinus Walleij * @adc_bat_ctrl: ADC channel for the battery control 878c0984e5SSebastian Reichel * @fg: Pointer to the struct fg 888c0984e5SSebastian Reichel * @bm: Platform specific battery management information 898c0984e5SSebastian Reichel * @btemp_psy: Structure for BTEMP specific battery properties 908c0984e5SSebastian Reichel * @events: Structure for information about events triggered 918c0984e5SSebastian Reichel * @btemp_ranges: Battery temperature range structure 928c0984e5SSebastian Reichel * @btemp_wq: Work queue for measuring the temperature periodically 938c0984e5SSebastian Reichel * @btemp_periodic_work: Work for measuring the temperature periodically 948c0984e5SSebastian Reichel * @initialized: True if battery id read. 958c0984e5SSebastian Reichel */ 968c0984e5SSebastian Reichel struct ab8500_btemp { 978c0984e5SSebastian Reichel struct device *dev; 988c0984e5SSebastian Reichel struct list_head node; 998c0984e5SSebastian Reichel int curr_source; 1008c0984e5SSebastian Reichel int bat_temp; 1018c0984e5SSebastian Reichel int prev_bat_temp; 1028c0984e5SSebastian Reichel struct ab8500 *parent; 1030a8686e3SLinus Walleij struct iio_channel *btemp_ball; 1040a8686e3SLinus Walleij struct iio_channel *bat_ctrl; 1058c0984e5SSebastian Reichel struct ab8500_fg *fg; 106484a9cc3SLinus Walleij struct ab8500_bm_data *bm; 1078c0984e5SSebastian Reichel struct power_supply *btemp_psy; 1088c0984e5SSebastian Reichel struct ab8500_btemp_events events; 1098c0984e5SSebastian Reichel struct ab8500_btemp_ranges btemp_ranges; 1108c0984e5SSebastian Reichel struct workqueue_struct *btemp_wq; 1118c0984e5SSebastian Reichel struct delayed_work btemp_periodic_work; 1128c0984e5SSebastian Reichel bool initialized; 1138c0984e5SSebastian Reichel }; 1148c0984e5SSebastian Reichel 1158c0984e5SSebastian Reichel /* BTEMP power supply properties */ 1168c0984e5SSebastian Reichel static enum power_supply_property ab8500_btemp_props[] = { 1178c0984e5SSebastian Reichel POWER_SUPPLY_PROP_PRESENT, 1188c0984e5SSebastian Reichel POWER_SUPPLY_PROP_ONLINE, 1198c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TECHNOLOGY, 1208c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TEMP, 1218c0984e5SSebastian Reichel }; 1228c0984e5SSebastian Reichel 1238c0984e5SSebastian Reichel static LIST_HEAD(ab8500_btemp_list); 1248c0984e5SSebastian Reichel 1258c0984e5SSebastian Reichel /** 1268c0984e5SSebastian Reichel * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance 1278c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1288c0984e5SSebastian Reichel * @v_batctrl: measured batctrl voltage 1298c0984e5SSebastian Reichel * @inst_curr: measured instant current 1308c0984e5SSebastian Reichel * 1318c0984e5SSebastian Reichel * This function returns the battery resistance that is 1328c0984e5SSebastian Reichel * derived from the BATCTRL voltage. 1338c0984e5SSebastian Reichel * Returns value in Ohms. 1348c0984e5SSebastian Reichel */ 1358c0984e5SSebastian Reichel static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, 1368c0984e5SSebastian Reichel int v_batctrl, int inst_curr) 1378c0984e5SSebastian Reichel { 1388c0984e5SSebastian Reichel if (is_ab8500_1p1_or_earlier(di->parent)) { 1398c0984e5SSebastian Reichel /* 1408c0984e5SSebastian Reichel * For ABB cut1.0 and 1.1 BAT_CTRL is internally 1418c0984e5SSebastian Reichel * connected to 1.8V through a 450k resistor 1428c0984e5SSebastian Reichel */ 1438c0984e5SSebastian Reichel return (450000 * (v_batctrl)) / (1800 - v_batctrl); 1448c0984e5SSebastian Reichel } 1458c0984e5SSebastian Reichel 1468c0984e5SSebastian Reichel /* 1478c0984e5SSebastian Reichel * BAT_CTRL is internally 1488c0984e5SSebastian Reichel * connected to 1.8V through a 80k resistor 1498c0984e5SSebastian Reichel */ 150*d58964beSLinus Walleij return (80000 * (v_batctrl)) / (1800 - v_batctrl); 1518c0984e5SSebastian Reichel } 1528c0984e5SSebastian Reichel 1538c0984e5SSebastian Reichel /** 1548c0984e5SSebastian Reichel * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage 1558c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1568c0984e5SSebastian Reichel * 1578c0984e5SSebastian Reichel * This function returns the voltage on BATCTRL. Returns value in mV. 1588c0984e5SSebastian Reichel */ 1598c0984e5SSebastian Reichel static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) 1608c0984e5SSebastian Reichel { 1610a8686e3SLinus Walleij int vbtemp, ret; 1628c0984e5SSebastian Reichel static int prev; 1638c0984e5SSebastian Reichel 1640a8686e3SLinus Walleij ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp); 1650a8686e3SLinus Walleij if (ret < 0) { 1668c0984e5SSebastian Reichel dev_err(di->dev, 1670a8686e3SLinus Walleij "%s ADC conversion failed, using previous value", 1688c0984e5SSebastian Reichel __func__); 1698c0984e5SSebastian Reichel return prev; 1708c0984e5SSebastian Reichel } 1718c0984e5SSebastian Reichel prev = vbtemp; 1728c0984e5SSebastian Reichel return vbtemp; 1738c0984e5SSebastian Reichel } 1748c0984e5SSebastian Reichel 1758c0984e5SSebastian Reichel /** 1768c0984e5SSebastian Reichel * ab8500_btemp_get_batctrl_res() - get battery resistance 1778c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1788c0984e5SSebastian Reichel * 1798c0984e5SSebastian Reichel * This function returns the battery pack identification resistance. 1808c0984e5SSebastian Reichel * Returns value in Ohms. 1818c0984e5SSebastian Reichel */ 1828c0984e5SSebastian Reichel static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) 1838c0984e5SSebastian Reichel { 1848c0984e5SSebastian Reichel int ret; 1858c0984e5SSebastian Reichel int batctrl = 0; 1868c0984e5SSebastian Reichel int res; 1878c0984e5SSebastian Reichel int inst_curr; 1888c0984e5SSebastian Reichel int i; 1898c0984e5SSebastian Reichel 1908c0984e5SSebastian Reichel if (!di->fg) 1918c0984e5SSebastian Reichel di->fg = ab8500_fg_get(); 1928c0984e5SSebastian Reichel if (!di->fg) { 1938c0984e5SSebastian Reichel dev_err(di->dev, "No fg found\n"); 1948c0984e5SSebastian Reichel return -EINVAL; 1958c0984e5SSebastian Reichel } 1968c0984e5SSebastian Reichel 1978c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_start(di->fg); 1988c0984e5SSebastian Reichel 1998c0984e5SSebastian Reichel if (ret) { 2008c0984e5SSebastian Reichel dev_err(di->dev, "Failed to start current measurement\n"); 2018c0984e5SSebastian Reichel return ret; 2028c0984e5SSebastian Reichel } 2038c0984e5SSebastian Reichel 2048c0984e5SSebastian Reichel do { 2058c0984e5SSebastian Reichel msleep(20); 2068c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_started(di->fg)); 2078c0984e5SSebastian Reichel 2088c0984e5SSebastian Reichel i = 0; 2098c0984e5SSebastian Reichel 2108c0984e5SSebastian Reichel do { 2118c0984e5SSebastian Reichel batctrl += ab8500_btemp_read_batctrl_voltage(di); 2128c0984e5SSebastian Reichel i++; 2138c0984e5SSebastian Reichel msleep(20); 2148c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_done(di->fg)); 2158c0984e5SSebastian Reichel batctrl /= i; 2168c0984e5SSebastian Reichel 2178c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); 2188c0984e5SSebastian Reichel if (ret) { 2198c0984e5SSebastian Reichel dev_err(di->dev, "Failed to finalize current measurement\n"); 2208c0984e5SSebastian Reichel return ret; 2218c0984e5SSebastian Reichel } 2228c0984e5SSebastian Reichel 2238c0984e5SSebastian Reichel res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); 2248c0984e5SSebastian Reichel 2258c0984e5SSebastian Reichel dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", 2268c0984e5SSebastian Reichel __func__, batctrl, res, inst_curr, i); 2278c0984e5SSebastian Reichel 2288c0984e5SSebastian Reichel return res; 2298c0984e5SSebastian Reichel } 2308c0984e5SSebastian Reichel 2318c0984e5SSebastian Reichel /** 2328c0984e5SSebastian Reichel * ab8500_btemp_res_to_temp() - resistance to temperature 2338c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 2348c0984e5SSebastian Reichel * @tbl: pointer to the resiatance to temperature table 2358c0984e5SSebastian Reichel * @tbl_size: size of the resistance to temperature table 2368c0984e5SSebastian Reichel * @res: resistance to calculate the temperature from 2378c0984e5SSebastian Reichel * 238c56ca24aSColin Ian King * This function returns the battery temperature in degrees Celsius 2398c0984e5SSebastian Reichel * based on the NTC resistance. 2408c0984e5SSebastian Reichel */ 2418c0984e5SSebastian Reichel static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di, 242484a9cc3SLinus Walleij const struct ab8500_res_to_temp *tbl, int tbl_size, int res) 2438c0984e5SSebastian Reichel { 24433237fb8SGustavo A. R. Silva int i; 2458c0984e5SSebastian Reichel /* 2468c0984e5SSebastian Reichel * Calculate the formula for the straight line 2478c0984e5SSebastian Reichel * Simple interpolation if we are within 2488c0984e5SSebastian Reichel * the resistance table limits, extrapolate 2498c0984e5SSebastian Reichel * if resistance is outside the limits. 2508c0984e5SSebastian Reichel */ 2518c0984e5SSebastian Reichel if (res > tbl[0].resist) 2528c0984e5SSebastian Reichel i = 0; 2538c0984e5SSebastian Reichel else if (res <= tbl[tbl_size - 1].resist) 2548c0984e5SSebastian Reichel i = tbl_size - 2; 2558c0984e5SSebastian Reichel else { 2568c0984e5SSebastian Reichel i = 0; 2578c0984e5SSebastian Reichel while (!(res <= tbl[i].resist && 2588c0984e5SSebastian Reichel res > tbl[i + 1].resist)) 2598c0984e5SSebastian Reichel i++; 2608c0984e5SSebastian Reichel } 2618c0984e5SSebastian Reichel 262f8205474SLinus Walleij return fixp_linear_interpolate(tbl[i].resist, tbl[i].temp, 263f8205474SLinus Walleij tbl[i + 1].resist, tbl[i + 1].temp, 264f8205474SLinus Walleij res); 2658c0984e5SSebastian Reichel } 2668c0984e5SSebastian Reichel 2678c0984e5SSebastian Reichel /** 2688c0984e5SSebastian Reichel * ab8500_btemp_measure_temp() - measure battery temperature 2698c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 2708c0984e5SSebastian Reichel * 2718c0984e5SSebastian Reichel * Returns battery temperature (on success) else the previous temperature 2728c0984e5SSebastian Reichel */ 2738c0984e5SSebastian Reichel static int ab8500_btemp_measure_temp(struct ab8500_btemp *di) 2748c0984e5SSebastian Reichel { 2750a8686e3SLinus Walleij int temp, ret; 2768c0984e5SSebastian Reichel static int prev; 277*d58964beSLinus Walleij int rntc, vntc; 2788c0984e5SSebastian Reichel 2790a8686e3SLinus Walleij ret = iio_read_channel_processed(di->btemp_ball, &vntc); 2800a8686e3SLinus Walleij if (ret < 0) { 2818c0984e5SSebastian Reichel dev_err(di->dev, 2820a8686e3SLinus Walleij "%s ADC conversion failed," 2838c0984e5SSebastian Reichel " using previous value\n", __func__); 2848c0984e5SSebastian Reichel return prev; 2858c0984e5SSebastian Reichel } 2868c0984e5SSebastian Reichel /* 2878c0984e5SSebastian Reichel * The PCB NTC is sourced from VTVOUT via a 230kOhm 2888c0984e5SSebastian Reichel * resistor. 2898c0984e5SSebastian Reichel */ 2908c0984e5SSebastian Reichel rntc = 230000 * vntc / (VTVOUT_V - vntc); 2918c0984e5SSebastian Reichel 2928c0984e5SSebastian Reichel temp = ab8500_btemp_res_to_temp(di, 293e5dff305SLinus Walleij di->bm->bat_type->r_to_t_tbl, 294e5dff305SLinus Walleij di->bm->bat_type->n_temp_tbl_elements, rntc); 2958c0984e5SSebastian Reichel prev = temp; 296*d58964beSLinus Walleij 2978c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is %d\n", temp); 2988c0984e5SSebastian Reichel return temp; 2998c0984e5SSebastian Reichel } 3008c0984e5SSebastian Reichel 3018c0984e5SSebastian Reichel /** 3028c0984e5SSebastian Reichel * ab8500_btemp_id() - Identify the connected battery 3038c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 3048c0984e5SSebastian Reichel * 3058c0984e5SSebastian Reichel * This function will try to identify the battery by reading the ID 3068c0984e5SSebastian Reichel * resistor. Some brands use a combined ID resistor with a NTC resistor to 3078c0984e5SSebastian Reichel * both be able to identify and to read the temperature of it. 3088c0984e5SSebastian Reichel */ 3098c0984e5SSebastian Reichel static int ab8500_btemp_id(struct ab8500_btemp *di) 3108c0984e5SSebastian Reichel { 3118c0984e5SSebastian Reichel int res; 3128c0984e5SSebastian Reichel u8 i; 3138c0984e5SSebastian Reichel 3144c4268dcSLinus Walleij di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; 3158c0984e5SSebastian Reichel 3168c0984e5SSebastian Reichel res = ab8500_btemp_get_batctrl_res(di); 3178c0984e5SSebastian Reichel if (res < 0) { 3188c0984e5SSebastian Reichel dev_err(di->dev, "%s get batctrl res failed\n", __func__); 3198c0984e5SSebastian Reichel return -ENXIO; 3208c0984e5SSebastian Reichel } 3218c0984e5SSebastian Reichel 322e5dff305SLinus Walleij if ((res <= di->bm->bat_type->resis_high) && 323e5dff305SLinus Walleij (res >= di->bm->bat_type->resis_low)) { 324*d58964beSLinus Walleij dev_info(di->dev, "Battery detected on BATTEMP" 3258c0984e5SSebastian Reichel " low %d < res %d < high: %d" 3268c0984e5SSebastian Reichel " index: %d\n", 327e5dff305SLinus Walleij di->bm->bat_type->resis_low, res, 328e5dff305SLinus Walleij di->bm->bat_type->resis_high, i); 329e5dff305SLinus Walleij } else { 3308c0984e5SSebastian Reichel dev_warn(di->dev, "Battery identified as unknown" 3318c0984e5SSebastian Reichel ", resistance %d Ohm\n", res); 3328c0984e5SSebastian Reichel return -ENXIO; 3338c0984e5SSebastian Reichel } 3348c0984e5SSebastian Reichel 335e5dff305SLinus Walleij return 0; 3368c0984e5SSebastian Reichel } 3378c0984e5SSebastian Reichel 3388c0984e5SSebastian Reichel /** 3398c0984e5SSebastian Reichel * ab8500_btemp_periodic_work() - Measuring the temperature periodically 3408c0984e5SSebastian Reichel * @work: pointer to the work_struct structure 3418c0984e5SSebastian Reichel * 3428c0984e5SSebastian Reichel * Work function for measuring the temperature periodically 3438c0984e5SSebastian Reichel */ 3448c0984e5SSebastian Reichel static void ab8500_btemp_periodic_work(struct work_struct *work) 3458c0984e5SSebastian Reichel { 3468c0984e5SSebastian Reichel int interval; 3478c0984e5SSebastian Reichel int bat_temp; 3488c0984e5SSebastian Reichel struct ab8500_btemp *di = container_of(work, 3498c0984e5SSebastian Reichel struct ab8500_btemp, btemp_periodic_work.work); 3508c0984e5SSebastian Reichel 3518c0984e5SSebastian Reichel if (!di->initialized) { 3528c0984e5SSebastian Reichel /* Identify the battery */ 3538c0984e5SSebastian Reichel if (ab8500_btemp_id(di) < 0) 3548c0984e5SSebastian Reichel dev_warn(di->dev, "failed to identify the battery\n"); 3558c0984e5SSebastian Reichel } 3568c0984e5SSebastian Reichel 3578c0984e5SSebastian Reichel bat_temp = ab8500_btemp_measure_temp(di); 3588c0984e5SSebastian Reichel /* 3598c0984e5SSebastian Reichel * Filter battery temperature. 3608c0984e5SSebastian Reichel * Allow direct updates on temperature only if two samples result in 3618c0984e5SSebastian Reichel * same temperature. Else only allow 1 degree change from previous 3628c0984e5SSebastian Reichel * reported value in the direction of the new measurement. 3638c0984e5SSebastian Reichel */ 3648c0984e5SSebastian Reichel if ((bat_temp == di->prev_bat_temp) || !di->initialized) { 3658c0984e5SSebastian Reichel if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { 3668c0984e5SSebastian Reichel di->initialized = true; 3678c0984e5SSebastian Reichel di->bat_temp = bat_temp; 3688c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3698c0984e5SSebastian Reichel } 3708c0984e5SSebastian Reichel } else if (bat_temp < di->prev_bat_temp) { 3718c0984e5SSebastian Reichel di->bat_temp--; 3728c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3738c0984e5SSebastian Reichel } else if (bat_temp > di->prev_bat_temp) { 3748c0984e5SSebastian Reichel di->bat_temp++; 3758c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 3768c0984e5SSebastian Reichel } 3778c0984e5SSebastian Reichel di->prev_bat_temp = bat_temp; 3788c0984e5SSebastian Reichel 3798c0984e5SSebastian Reichel if (di->events.ac_conn || di->events.usb_conn) 3808c0984e5SSebastian Reichel interval = di->bm->temp_interval_chg; 3818c0984e5SSebastian Reichel else 3828c0984e5SSebastian Reichel interval = di->bm->temp_interval_nochg; 3838c0984e5SSebastian Reichel 3848c0984e5SSebastian Reichel /* Schedule a new measurement */ 3858c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, 3868c0984e5SSebastian Reichel &di->btemp_periodic_work, 3878c0984e5SSebastian Reichel round_jiffies(interval * HZ)); 3888c0984e5SSebastian Reichel } 3898c0984e5SSebastian Reichel 3908c0984e5SSebastian Reichel /** 3918c0984e5SSebastian Reichel * ab8500_btemp_batctrlindb_handler() - battery removal detected 3928c0984e5SSebastian Reichel * @irq: interrupt number 3938c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 3948c0984e5SSebastian Reichel * 3958c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 3968c0984e5SSebastian Reichel */ 3978c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) 3988c0984e5SSebastian Reichel { 3998c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4008c0984e5SSebastian Reichel dev_err(di->dev, "Battery removal detected!\n"); 4018c0984e5SSebastian Reichel 4028c0984e5SSebastian Reichel di->events.batt_rem = true; 4038c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4048c0984e5SSebastian Reichel 4058c0984e5SSebastian Reichel return IRQ_HANDLED; 4068c0984e5SSebastian Reichel } 4078c0984e5SSebastian Reichel 4088c0984e5SSebastian Reichel /** 4098c0984e5SSebastian Reichel * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees 4108c0984e5SSebastian Reichel * @irq: interrupt number 4118c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 4128c0984e5SSebastian Reichel * 4138c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 4148c0984e5SSebastian Reichel */ 4158c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) 4168c0984e5SSebastian Reichel { 4178c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4188c0984e5SSebastian Reichel 4198c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) { 4208c0984e5SSebastian Reichel dev_dbg(di->dev, "Ignore false btemp low irq" 4218c0984e5SSebastian Reichel " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); 4228c0984e5SSebastian Reichel } else { 4238c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); 4248c0984e5SSebastian Reichel 4258c0984e5SSebastian Reichel di->events.btemp_low = true; 4268c0984e5SSebastian Reichel di->events.btemp_high = false; 4278c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 4288c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 4298c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4308c0984e5SSebastian Reichel } 4318c0984e5SSebastian Reichel 4328c0984e5SSebastian Reichel return IRQ_HANDLED; 4338c0984e5SSebastian Reichel } 4348c0984e5SSebastian Reichel 4358c0984e5SSebastian Reichel /** 4368c0984e5SSebastian Reichel * ab8500_btemp_temphigh_handler() - battery temp higher than max temp 4378c0984e5SSebastian Reichel * @irq: interrupt number 4388c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 4398c0984e5SSebastian Reichel * 4408c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 4418c0984e5SSebastian Reichel */ 4428c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) 4438c0984e5SSebastian Reichel { 4448c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4458c0984e5SSebastian Reichel 4468c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); 4478c0984e5SSebastian Reichel 4488c0984e5SSebastian Reichel di->events.btemp_high = true; 4498c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 4508c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 4518c0984e5SSebastian Reichel di->events.btemp_low = false; 4528c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4538c0984e5SSebastian Reichel 4548c0984e5SSebastian Reichel return IRQ_HANDLED; 4558c0984e5SSebastian Reichel } 4568c0984e5SSebastian Reichel 4578c0984e5SSebastian Reichel /** 4588c0984e5SSebastian Reichel * ab8500_btemp_lowmed_handler() - battery temp between low and medium 4598c0984e5SSebastian Reichel * @irq: interrupt number 4608c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 4618c0984e5SSebastian Reichel * 4628c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 4638c0984e5SSebastian Reichel */ 4648c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) 4658c0984e5SSebastian Reichel { 4668c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4678c0984e5SSebastian Reichel 4688c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between low and medium\n"); 4698c0984e5SSebastian Reichel 4708c0984e5SSebastian Reichel di->events.btemp_lowmed = true; 4718c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 4728c0984e5SSebastian Reichel di->events.btemp_high = false; 4738c0984e5SSebastian Reichel di->events.btemp_low = false; 4748c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4758c0984e5SSebastian Reichel 4768c0984e5SSebastian Reichel return IRQ_HANDLED; 4778c0984e5SSebastian Reichel } 4788c0984e5SSebastian Reichel 4798c0984e5SSebastian Reichel /** 4808c0984e5SSebastian Reichel * ab8500_btemp_medhigh_handler() - battery temp between medium and high 4818c0984e5SSebastian Reichel * @irq: interrupt number 4828c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 4838c0984e5SSebastian Reichel * 4848c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 4858c0984e5SSebastian Reichel */ 4868c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) 4878c0984e5SSebastian Reichel { 4888c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 4898c0984e5SSebastian Reichel 4908c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between medium and high\n"); 4918c0984e5SSebastian Reichel 4928c0984e5SSebastian Reichel di->events.btemp_medhigh = true; 4938c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 4948c0984e5SSebastian Reichel di->events.btemp_high = false; 4958c0984e5SSebastian Reichel di->events.btemp_low = false; 4968c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 4978c0984e5SSebastian Reichel 4988c0984e5SSebastian Reichel return IRQ_HANDLED; 4998c0984e5SSebastian Reichel } 5008c0984e5SSebastian Reichel 5018c0984e5SSebastian Reichel /** 5028c0984e5SSebastian Reichel * ab8500_btemp_periodic() - Periodic temperature measurements 5038c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 5048c0984e5SSebastian Reichel * @enable: enable or disable periodic temperature measurements 5058c0984e5SSebastian Reichel * 5068c0984e5SSebastian Reichel * Starts of stops periodic temperature measurements. Periodic measurements 5078c0984e5SSebastian Reichel * should only be done when a charger is connected. 5088c0984e5SSebastian Reichel */ 5098c0984e5SSebastian Reichel static void ab8500_btemp_periodic(struct ab8500_btemp *di, 5108c0984e5SSebastian Reichel bool enable) 5118c0984e5SSebastian Reichel { 5128c0984e5SSebastian Reichel dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", 5138c0984e5SSebastian Reichel enable); 5148c0984e5SSebastian Reichel /* 5158c0984e5SSebastian Reichel * Make sure a new measurement is done directly by cancelling 5168c0984e5SSebastian Reichel * any pending work 5178c0984e5SSebastian Reichel */ 5188c0984e5SSebastian Reichel cancel_delayed_work_sync(&di->btemp_periodic_work); 5198c0984e5SSebastian Reichel 5208c0984e5SSebastian Reichel if (enable) 5218c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); 5228c0984e5SSebastian Reichel } 5238c0984e5SSebastian Reichel 5248c0984e5SSebastian Reichel /** 5258c0984e5SSebastian Reichel * ab8500_btemp_get_temp() - get battery temperature 5268c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 5278c0984e5SSebastian Reichel * 5288c0984e5SSebastian Reichel * Returns battery temperature 5298c0984e5SSebastian Reichel */ 530417c0fc2SLinus Walleij static int ab8500_btemp_get_temp(struct ab8500_btemp *di) 5318c0984e5SSebastian Reichel { 5328c0984e5SSebastian Reichel int temp = 0; 5338c0984e5SSebastian Reichel 5348c0984e5SSebastian Reichel /* 5358c0984e5SSebastian Reichel * The BTEMP events are not reliabe on AB8500 cut3.3 5368c0984e5SSebastian Reichel * and prior versions 5378c0984e5SSebastian Reichel */ 5388c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) { 5398c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5408c0984e5SSebastian Reichel } else { 5418c0984e5SSebastian Reichel if (di->events.btemp_low) { 5428c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_low_limit) 5438c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_low_limit * 10; 5448c0984e5SSebastian Reichel else 5458c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5468c0984e5SSebastian Reichel } else if (di->events.btemp_high) { 5478c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_high_limit) 5488c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_high_limit * 10; 5498c0984e5SSebastian Reichel else 5508c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5518c0984e5SSebastian Reichel } else if (di->events.btemp_lowmed) { 5528c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_med_limit) 5538c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10; 5548c0984e5SSebastian Reichel else 5558c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5568c0984e5SSebastian Reichel } else if (di->events.btemp_medhigh) { 5578c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_med_limit) 5588c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10; 5598c0984e5SSebastian Reichel else 5608c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5618c0984e5SSebastian Reichel } else 5628c0984e5SSebastian Reichel temp = di->bat_temp * 10; 5638c0984e5SSebastian Reichel } 5648c0984e5SSebastian Reichel return temp; 5658c0984e5SSebastian Reichel } 5668c0984e5SSebastian Reichel 5678c0984e5SSebastian Reichel /** 5688c0984e5SSebastian Reichel * ab8500_btemp_get_property() - get the btemp properties 5698c0984e5SSebastian Reichel * @psy: pointer to the power_supply structure 5708c0984e5SSebastian Reichel * @psp: pointer to the power_supply_property structure 5718c0984e5SSebastian Reichel * @val: pointer to the power_supply_propval union 5728c0984e5SSebastian Reichel * 5738c0984e5SSebastian Reichel * This function gets called when an application tries to get the btemp 5748c0984e5SSebastian Reichel * properties by reading the sysfs files. 5758c0984e5SSebastian Reichel * online: presence of the battery 5768c0984e5SSebastian Reichel * present: presence of the battery 5778c0984e5SSebastian Reichel * technology: battery technology 5788c0984e5SSebastian Reichel * temp: battery temperature 5798c0984e5SSebastian Reichel * Returns error code in case of failure else 0(on success) 5808c0984e5SSebastian Reichel */ 5818c0984e5SSebastian Reichel static int ab8500_btemp_get_property(struct power_supply *psy, 5828c0984e5SSebastian Reichel enum power_supply_property psp, 5838c0984e5SSebastian Reichel union power_supply_propval *val) 5848c0984e5SSebastian Reichel { 5858c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy); 5868c0984e5SSebastian Reichel 5878c0984e5SSebastian Reichel switch (psp) { 5888c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT: 5898c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_ONLINE: 5908c0984e5SSebastian Reichel if (di->events.batt_rem) 5918c0984e5SSebastian Reichel val->intval = 0; 5928c0984e5SSebastian Reichel else 5938c0984e5SSebastian Reichel val->intval = 1; 5948c0984e5SSebastian Reichel break; 5958c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TECHNOLOGY: 59625fd3303SLinus Walleij if (di->bm->bi) 59725fd3303SLinus Walleij val->intval = di->bm->bi->technology; 59825fd3303SLinus Walleij else 59925fd3303SLinus Walleij val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 6008c0984e5SSebastian Reichel break; 6018c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TEMP: 6028c0984e5SSebastian Reichel val->intval = ab8500_btemp_get_temp(di); 6038c0984e5SSebastian Reichel break; 6048c0984e5SSebastian Reichel default: 6058c0984e5SSebastian Reichel return -EINVAL; 6068c0984e5SSebastian Reichel } 6078c0984e5SSebastian Reichel return 0; 6088c0984e5SSebastian Reichel } 6098c0984e5SSebastian Reichel 6108c0984e5SSebastian Reichel static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) 6118c0984e5SSebastian Reichel { 6128c0984e5SSebastian Reichel struct power_supply *psy; 6138c0984e5SSebastian Reichel struct power_supply *ext = dev_get_drvdata(dev); 6148c0984e5SSebastian Reichel const char **supplicants = (const char **)ext->supplied_to; 6158c0984e5SSebastian Reichel struct ab8500_btemp *di; 6168c0984e5SSebastian Reichel union power_supply_propval ret; 6178c0984e5SSebastian Reichel int j; 6188c0984e5SSebastian Reichel 6198c0984e5SSebastian Reichel psy = (struct power_supply *)data; 6208c0984e5SSebastian Reichel di = power_supply_get_drvdata(psy); 6218c0984e5SSebastian Reichel 6228c0984e5SSebastian Reichel /* 6238c0984e5SSebastian Reichel * For all psy where the name of your driver 6248c0984e5SSebastian Reichel * appears in any supplied_to 6258c0984e5SSebastian Reichel */ 6268c0984e5SSebastian Reichel j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 6278c0984e5SSebastian Reichel if (j < 0) 6288c0984e5SSebastian Reichel return 0; 6298c0984e5SSebastian Reichel 6308c0984e5SSebastian Reichel /* Go through all properties for the psy */ 6318c0984e5SSebastian Reichel for (j = 0; j < ext->desc->num_properties; j++) { 6328c0984e5SSebastian Reichel enum power_supply_property prop; 6338c0984e5SSebastian Reichel prop = ext->desc->properties[j]; 6348c0984e5SSebastian Reichel 6358c0984e5SSebastian Reichel if (power_supply_get_property(ext, prop, &ret)) 6368c0984e5SSebastian Reichel continue; 6378c0984e5SSebastian Reichel 6388c0984e5SSebastian Reichel switch (prop) { 6398c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT: 6408c0984e5SSebastian Reichel switch (ext->desc->type) { 6418c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_MAINS: 6428c0984e5SSebastian Reichel /* AC disconnected */ 6438c0984e5SSebastian Reichel if (!ret.intval && di->events.ac_conn) { 6448c0984e5SSebastian Reichel di->events.ac_conn = false; 6458c0984e5SSebastian Reichel } 6468c0984e5SSebastian Reichel /* AC connected */ 6478c0984e5SSebastian Reichel else if (ret.intval && !di->events.ac_conn) { 6488c0984e5SSebastian Reichel di->events.ac_conn = true; 6498c0984e5SSebastian Reichel if (!di->events.usb_conn) 6508c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 6518c0984e5SSebastian Reichel } 6528c0984e5SSebastian Reichel break; 6538c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_USB: 6548c0984e5SSebastian Reichel /* USB disconnected */ 6558c0984e5SSebastian Reichel if (!ret.intval && di->events.usb_conn) { 6568c0984e5SSebastian Reichel di->events.usb_conn = false; 6578c0984e5SSebastian Reichel } 6588c0984e5SSebastian Reichel /* USB connected */ 6598c0984e5SSebastian Reichel else if (ret.intval && !di->events.usb_conn) { 6608c0984e5SSebastian Reichel di->events.usb_conn = true; 6618c0984e5SSebastian Reichel if (!di->events.ac_conn) 6628c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 6638c0984e5SSebastian Reichel } 6648c0984e5SSebastian Reichel break; 6658c0984e5SSebastian Reichel default: 6668c0984e5SSebastian Reichel break; 6678c0984e5SSebastian Reichel } 6688c0984e5SSebastian Reichel break; 6698c0984e5SSebastian Reichel default: 6708c0984e5SSebastian Reichel break; 6718c0984e5SSebastian Reichel } 6728c0984e5SSebastian Reichel } 6738c0984e5SSebastian Reichel return 0; 6748c0984e5SSebastian Reichel } 6758c0984e5SSebastian Reichel 6768c0984e5SSebastian Reichel /** 6778c0984e5SSebastian Reichel * ab8500_btemp_external_power_changed() - callback for power supply changes 6788c0984e5SSebastian Reichel * @psy: pointer to the structure power_supply 6798c0984e5SSebastian Reichel * 6808c0984e5SSebastian Reichel * This function is pointing to the function pointer external_power_changed 6818c0984e5SSebastian Reichel * of the structure power_supply. 6828c0984e5SSebastian Reichel * This function gets executed when there is a change in the external power 6838c0984e5SSebastian Reichel * supply to the btemp. 6848c0984e5SSebastian Reichel */ 6858c0984e5SSebastian Reichel static void ab8500_btemp_external_power_changed(struct power_supply *psy) 6868c0984e5SSebastian Reichel { 6878c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy); 6888c0984e5SSebastian Reichel 6898c0984e5SSebastian Reichel class_for_each_device(power_supply_class, NULL, 6908c0984e5SSebastian Reichel di->btemp_psy, ab8500_btemp_get_ext_psy_data); 6918c0984e5SSebastian Reichel } 6928c0984e5SSebastian Reichel 6938c0984e5SSebastian Reichel /* ab8500 btemp driver interrupts and their respective isr */ 6948c0984e5SSebastian Reichel static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { 6958c0984e5SSebastian Reichel {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, 6968c0984e5SSebastian Reichel {"BTEMP_LOW", ab8500_btemp_templow_handler}, 6978c0984e5SSebastian Reichel {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, 6988c0984e5SSebastian Reichel {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, 6998c0984e5SSebastian Reichel {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, 7008c0984e5SSebastian Reichel }; 7018c0984e5SSebastian Reichel 702f8efa0a8SLinus Walleij static int __maybe_unused ab8500_btemp_resume(struct device *dev) 7038c0984e5SSebastian Reichel { 704f8efa0a8SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 7058c0984e5SSebastian Reichel 7068c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 7078c0984e5SSebastian Reichel 7088c0984e5SSebastian Reichel return 0; 7098c0984e5SSebastian Reichel } 7108c0984e5SSebastian Reichel 711f8efa0a8SLinus Walleij static int __maybe_unused ab8500_btemp_suspend(struct device *dev) 7128c0984e5SSebastian Reichel { 713f8efa0a8SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 7148c0984e5SSebastian Reichel 7158c0984e5SSebastian Reichel ab8500_btemp_periodic(di, false); 7168c0984e5SSebastian Reichel 7178c0984e5SSebastian Reichel return 0; 7188c0984e5SSebastian Reichel } 7198c0984e5SSebastian Reichel 7208c0984e5SSebastian Reichel static char *supply_interface[] = { 7218c0984e5SSebastian Reichel "ab8500_chargalg", 7228c0984e5SSebastian Reichel "ab8500_fg", 7238c0984e5SSebastian Reichel }; 7248c0984e5SSebastian Reichel 7258c0984e5SSebastian Reichel static const struct power_supply_desc ab8500_btemp_desc = { 7268c0984e5SSebastian Reichel .name = "ab8500_btemp", 7278c0984e5SSebastian Reichel .type = POWER_SUPPLY_TYPE_BATTERY, 7288c0984e5SSebastian Reichel .properties = ab8500_btemp_props, 7298c0984e5SSebastian Reichel .num_properties = ARRAY_SIZE(ab8500_btemp_props), 7308c0984e5SSebastian Reichel .get_property = ab8500_btemp_get_property, 7318c0984e5SSebastian Reichel .external_power_changed = ab8500_btemp_external_power_changed, 7328c0984e5SSebastian Reichel }; 7338c0984e5SSebastian Reichel 7341c1f13a0SLinus Walleij static int ab8500_btemp_bind(struct device *dev, struct device *master, 7351c1f13a0SLinus Walleij void *data) 7361c1f13a0SLinus Walleij { 7371c1f13a0SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 7381c1f13a0SLinus Walleij 7391c1f13a0SLinus Walleij /* Create a work queue for the btemp */ 7401c1f13a0SLinus Walleij di->btemp_wq = 7411c1f13a0SLinus Walleij alloc_workqueue("ab8500_btemp_wq", WQ_MEM_RECLAIM, 0); 7421c1f13a0SLinus Walleij if (di->btemp_wq == NULL) { 7431c1f13a0SLinus Walleij dev_err(dev, "failed to create work queue\n"); 7441c1f13a0SLinus Walleij return -ENOMEM; 7451c1f13a0SLinus Walleij } 7461c1f13a0SLinus Walleij 7471c1f13a0SLinus Walleij /* Kick off periodic temperature measurements */ 7481c1f13a0SLinus Walleij ab8500_btemp_periodic(di, true); 7491c1f13a0SLinus Walleij 7501c1f13a0SLinus Walleij return 0; 7511c1f13a0SLinus Walleij } 7521c1f13a0SLinus Walleij 7531c1f13a0SLinus Walleij static void ab8500_btemp_unbind(struct device *dev, struct device *master, 7541c1f13a0SLinus Walleij void *data) 7551c1f13a0SLinus Walleij { 7561c1f13a0SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev); 7571c1f13a0SLinus Walleij 7581c1f13a0SLinus Walleij /* Delete the work queue */ 7591c1f13a0SLinus Walleij destroy_workqueue(di->btemp_wq); 7601c1f13a0SLinus Walleij flush_scheduled_work(); 7611c1f13a0SLinus Walleij } 7621c1f13a0SLinus Walleij 7631c1f13a0SLinus Walleij static const struct component_ops ab8500_btemp_component_ops = { 7641c1f13a0SLinus Walleij .bind = ab8500_btemp_bind, 7651c1f13a0SLinus Walleij .unbind = ab8500_btemp_unbind, 7661c1f13a0SLinus Walleij }; 7671c1f13a0SLinus Walleij 7688c0984e5SSebastian Reichel static int ab8500_btemp_probe(struct platform_device *pdev) 7698c0984e5SSebastian Reichel { 7708c0984e5SSebastian Reichel struct power_supply_config psy_cfg = {}; 771ad89cb5fSLinus Walleij struct device *dev = &pdev->dev; 7728c0984e5SSebastian Reichel struct ab8500_btemp *di; 7738c0984e5SSebastian Reichel int irq, i, ret = 0; 7748c0984e5SSebastian Reichel u8 val; 7758c0984e5SSebastian Reichel 776ad89cb5fSLinus Walleij di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); 777ad89cb5fSLinus Walleij if (!di) 7788c0984e5SSebastian Reichel return -ENOMEM; 7798c0984e5SSebastian Reichel 780417c0fc2SLinus Walleij di->bm = &ab8500_bm_data; 7818c0984e5SSebastian Reichel 7828c0984e5SSebastian Reichel /* get parent data */ 783ad89cb5fSLinus Walleij di->dev = dev; 7848c0984e5SSebastian Reichel di->parent = dev_get_drvdata(pdev->dev.parent); 7850a8686e3SLinus Walleij 7860a8686e3SLinus Walleij /* Get ADC channels */ 787ad89cb5fSLinus Walleij di->btemp_ball = devm_iio_channel_get(dev, "btemp_ball"); 7880a8686e3SLinus Walleij if (IS_ERR(di->btemp_ball)) { 78936f1de0dSLinus Walleij ret = dev_err_probe(dev, PTR_ERR(di->btemp_ball), 79036f1de0dSLinus Walleij "failed to get BTEMP BALL ADC channel\n"); 79136f1de0dSLinus Walleij return ret; 7920a8686e3SLinus Walleij } 793ad89cb5fSLinus Walleij di->bat_ctrl = devm_iio_channel_get(dev, "bat_ctrl"); 7940a8686e3SLinus Walleij if (IS_ERR(di->bat_ctrl)) { 79536f1de0dSLinus Walleij ret = dev_err_probe(dev, PTR_ERR(di->bat_ctrl), 79636f1de0dSLinus Walleij "failed to get BAT CTRL ADC channel\n"); 79736f1de0dSLinus Walleij return ret; 7980a8686e3SLinus Walleij } 7998c0984e5SSebastian Reichel 8008c0984e5SSebastian Reichel di->initialized = false; 8018c0984e5SSebastian Reichel 8028c0984e5SSebastian Reichel psy_cfg.supplied_to = supply_interface; 8038c0984e5SSebastian Reichel psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 8048c0984e5SSebastian Reichel psy_cfg.drv_data = di; 8058c0984e5SSebastian Reichel 8068c0984e5SSebastian Reichel /* Init work for measuring temperature periodically */ 8078c0984e5SSebastian Reichel INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, 8088c0984e5SSebastian Reichel ab8500_btemp_periodic_work); 8098c0984e5SSebastian Reichel 8108c0984e5SSebastian Reichel /* Set BTEMP thermal limits. Low and Med are fixed */ 8118c0984e5SSebastian Reichel di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; 8128c0984e5SSebastian Reichel di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; 8138c0984e5SSebastian Reichel 814ad89cb5fSLinus Walleij ret = abx500_get_register_interruptible(dev, AB8500_CHARGER, 8158c0984e5SSebastian Reichel AB8500_BTEMP_HIGH_TH, &val); 8168c0984e5SSebastian Reichel if (ret < 0) { 817ad89cb5fSLinus Walleij dev_err(dev, "%s ab8500 read failed\n", __func__); 8181c1f13a0SLinus Walleij return ret; 8198c0984e5SSebastian Reichel } 8208c0984e5SSebastian Reichel switch (val) { 8218c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_0: 8228c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_1: 8238c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 8248c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_57; 8258c0984e5SSebastian Reichel break; 8268c0984e5SSebastian Reichel case BTEMP_HIGH_TH_52: 8278c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 8288c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_52; 8298c0984e5SSebastian Reichel break; 8308c0984e5SSebastian Reichel case BTEMP_HIGH_TH_62: 8318c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 8328c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_62; 8338c0984e5SSebastian Reichel break; 8348c0984e5SSebastian Reichel } 8358c0984e5SSebastian Reichel 8368c0984e5SSebastian Reichel /* Register BTEMP power supply class */ 8371c1f13a0SLinus Walleij di->btemp_psy = devm_power_supply_register(dev, &ab8500_btemp_desc, 8388c0984e5SSebastian Reichel &psy_cfg); 8398c0984e5SSebastian Reichel if (IS_ERR(di->btemp_psy)) { 840ad89cb5fSLinus Walleij dev_err(dev, "failed to register BTEMP psy\n"); 8411c1f13a0SLinus Walleij return PTR_ERR(di->btemp_psy); 8428c0984e5SSebastian Reichel } 8438c0984e5SSebastian Reichel 8448c0984e5SSebastian Reichel /* Register interrupts */ 8458c0984e5SSebastian Reichel for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { 8468c0984e5SSebastian Reichel irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); 8471c1f13a0SLinus Walleij if (irq < 0) 8481c1f13a0SLinus Walleij return irq; 849b10e9700SKrzysztof Kozlowski 8501c1f13a0SLinus Walleij ret = devm_request_threaded_irq(dev, irq, NULL, 8511c1f13a0SLinus Walleij ab8500_btemp_irq[i].isr, 852df12470cSTian Tao IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, 8538c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, di); 8548c0984e5SSebastian Reichel 8558c0984e5SSebastian Reichel if (ret) { 856ad89cb5fSLinus Walleij dev_err(dev, "failed to request %s IRQ %d: %d\n" 8578c0984e5SSebastian Reichel , ab8500_btemp_irq[i].name, irq, ret); 8581c1f13a0SLinus Walleij return ret; 8598c0984e5SSebastian Reichel } 860ad89cb5fSLinus Walleij dev_dbg(dev, "Requested %s IRQ %d: %d\n", 8618c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, irq, ret); 8628c0984e5SSebastian Reichel } 8638c0984e5SSebastian Reichel 8648c0984e5SSebastian Reichel platform_set_drvdata(pdev, di); 8658c0984e5SSebastian Reichel 8668c0984e5SSebastian Reichel list_add_tail(&di->node, &ab8500_btemp_list); 8678c0984e5SSebastian Reichel 8681c1f13a0SLinus Walleij return component_add(dev, &ab8500_btemp_component_ops); 8698c0984e5SSebastian Reichel } 870ccc023a5SKrzysztof Kozlowski 8711c1f13a0SLinus Walleij static int ab8500_btemp_remove(struct platform_device *pdev) 8721c1f13a0SLinus Walleij { 8731c1f13a0SLinus Walleij component_del(&pdev->dev, &ab8500_btemp_component_ops); 8741c1f13a0SLinus Walleij 8751c1f13a0SLinus Walleij return 0; 8768c0984e5SSebastian Reichel } 8778c0984e5SSebastian Reichel 878f8efa0a8SLinus Walleij static SIMPLE_DEV_PM_OPS(ab8500_btemp_pm_ops, ab8500_btemp_suspend, ab8500_btemp_resume); 879f8efa0a8SLinus Walleij 8808c0984e5SSebastian Reichel static const struct of_device_id ab8500_btemp_match[] = { 8818c0984e5SSebastian Reichel { .compatible = "stericsson,ab8500-btemp", }, 8828c0984e5SSebastian Reichel { }, 8838c0984e5SSebastian Reichel }; 884dfe52db1SZou Wei MODULE_DEVICE_TABLE(of, ab8500_btemp_match); 8858c0984e5SSebastian Reichel 8861c1f13a0SLinus Walleij struct platform_driver ab8500_btemp_driver = { 8878c0984e5SSebastian Reichel .probe = ab8500_btemp_probe, 8888c0984e5SSebastian Reichel .remove = ab8500_btemp_remove, 8898c0984e5SSebastian Reichel .driver = { 8908c0984e5SSebastian Reichel .name = "ab8500-btemp", 8918c0984e5SSebastian Reichel .of_match_table = ab8500_btemp_match, 892f8efa0a8SLinus Walleij .pm = &ab8500_btemp_pm_ops, 8938c0984e5SSebastian Reichel }, 8948c0984e5SSebastian Reichel }; 8958c0984e5SSebastian Reichel MODULE_LICENSE("GPL v2"); 8968c0984e5SSebastian Reichel MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); 8978c0984e5SSebastian Reichel MODULE_ALIAS("platform:ab8500-btemp"); 8988c0984e5SSebastian Reichel MODULE_DESCRIPTION("AB8500 battery temperature driver"); 899