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> 168c0984e5SSebastian Reichel #include <linux/interrupt.h> 178c0984e5SSebastian Reichel #include <linux/delay.h> 188c0984e5SSebastian Reichel #include <linux/slab.h> 198c0984e5SSebastian Reichel #include <linux/platform_device.h> 208c0984e5SSebastian Reichel #include <linux/power_supply.h> 218c0984e5SSebastian Reichel #include <linux/completion.h> 228c0984e5SSebastian Reichel #include <linux/workqueue.h> 238c0984e5SSebastian Reichel #include <linux/jiffies.h> 248c0984e5SSebastian Reichel #include <linux/of.h> 258c0984e5SSebastian Reichel #include <linux/mfd/core.h> 268c0984e5SSebastian Reichel #include <linux/mfd/abx500.h> 278c0984e5SSebastian Reichel #include <linux/mfd/abx500/ab8500.h> 288c0984e5SSebastian Reichel #include <linux/mfd/abx500/ab8500-bm.h> 290a8686e3SLinus Walleij #include <linux/iio/consumer.h> 308c0984e5SSebastian Reichel 318c0984e5SSebastian Reichel #define VTVOUT_V 1800 328c0984e5SSebastian Reichel 338c0984e5SSebastian Reichel #define BTEMP_THERMAL_LOW_LIMIT -10 348c0984e5SSebastian Reichel #define BTEMP_THERMAL_MED_LIMIT 0 358c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_52 52 368c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_57 57 378c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_62 62 388c0984e5SSebastian Reichel 398c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_7UA 7 408c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_20UA 20 418c0984e5SSebastian Reichel 428c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_16UA 16 438c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_18UA 18 448c0984e5SSebastian Reichel 458c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_60UA 60 468c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_120UA 120 478c0984e5SSebastian Reichel 488c0984e5SSebastian Reichel /** 498c0984e5SSebastian Reichel * struct ab8500_btemp_interrupts - ab8500 interrupts 508c0984e5SSebastian Reichel * @name: name of the interrupt 518c0984e5SSebastian Reichel * @isr function pointer to the isr 528c0984e5SSebastian Reichel */ 538c0984e5SSebastian Reichel struct ab8500_btemp_interrupts { 548c0984e5SSebastian Reichel char *name; 558c0984e5SSebastian Reichel irqreturn_t (*isr)(int irq, void *data); 568c0984e5SSebastian Reichel }; 578c0984e5SSebastian Reichel 588c0984e5SSebastian Reichel struct ab8500_btemp_events { 598c0984e5SSebastian Reichel bool batt_rem; 608c0984e5SSebastian Reichel bool btemp_high; 618c0984e5SSebastian Reichel bool btemp_medhigh; 628c0984e5SSebastian Reichel bool btemp_lowmed; 638c0984e5SSebastian Reichel bool btemp_low; 648c0984e5SSebastian Reichel bool ac_conn; 658c0984e5SSebastian Reichel bool usb_conn; 668c0984e5SSebastian Reichel }; 678c0984e5SSebastian Reichel 688c0984e5SSebastian Reichel struct ab8500_btemp_ranges { 698c0984e5SSebastian Reichel int btemp_high_limit; 708c0984e5SSebastian Reichel int btemp_med_limit; 718c0984e5SSebastian Reichel int btemp_low_limit; 728c0984e5SSebastian Reichel }; 738c0984e5SSebastian Reichel 748c0984e5SSebastian Reichel /** 758c0984e5SSebastian Reichel * struct ab8500_btemp - ab8500 BTEMP device information 768c0984e5SSebastian Reichel * @dev: Pointer to the structure device 778c0984e5SSebastian Reichel * @node: List of AB8500 BTEMPs, hence prepared for reentrance 788c0984e5SSebastian Reichel * @curr_source: What current source we use, in uA 79c56ca24aSColin Ian King * @bat_temp: Dispatched battery temperature in degree Celsius 80c56ca24aSColin Ian King * @prev_bat_temp Last measured battery temperature in degree Celsius 818c0984e5SSebastian Reichel * @parent: Pointer to the struct ab8500 820a8686e3SLinus Walleij * @adc_btemp_ball: ADC channel for the battery ball temperature 830a8686e3SLinus Walleij * @adc_bat_ctrl: ADC channel for the battery control 848c0984e5SSebastian Reichel * @fg: Pointer to the struct fg 858c0984e5SSebastian Reichel * @bm: Platform specific battery management information 868c0984e5SSebastian Reichel * @btemp_psy: Structure for BTEMP specific battery properties 878c0984e5SSebastian Reichel * @events: Structure for information about events triggered 888c0984e5SSebastian Reichel * @btemp_ranges: Battery temperature range structure 898c0984e5SSebastian Reichel * @btemp_wq: Work queue for measuring the temperature periodically 908c0984e5SSebastian Reichel * @btemp_periodic_work: Work for measuring the temperature periodically 918c0984e5SSebastian Reichel * @initialized: True if battery id read. 928c0984e5SSebastian Reichel */ 938c0984e5SSebastian Reichel struct ab8500_btemp { 948c0984e5SSebastian Reichel struct device *dev; 958c0984e5SSebastian Reichel struct list_head node; 968c0984e5SSebastian Reichel int curr_source; 978c0984e5SSebastian Reichel int bat_temp; 988c0984e5SSebastian Reichel int prev_bat_temp; 998c0984e5SSebastian Reichel struct ab8500 *parent; 1000a8686e3SLinus Walleij struct iio_channel *btemp_ball; 1010a8686e3SLinus Walleij struct iio_channel *bat_ctrl; 1028c0984e5SSebastian Reichel struct ab8500_fg *fg; 1038c0984e5SSebastian Reichel struct abx500_bm_data *bm; 1048c0984e5SSebastian Reichel struct power_supply *btemp_psy; 1058c0984e5SSebastian Reichel struct ab8500_btemp_events events; 1068c0984e5SSebastian Reichel struct ab8500_btemp_ranges btemp_ranges; 1078c0984e5SSebastian Reichel struct workqueue_struct *btemp_wq; 1088c0984e5SSebastian Reichel struct delayed_work btemp_periodic_work; 1098c0984e5SSebastian Reichel bool initialized; 1108c0984e5SSebastian Reichel }; 1118c0984e5SSebastian Reichel 1128c0984e5SSebastian Reichel /* BTEMP power supply properties */ 1138c0984e5SSebastian Reichel static enum power_supply_property ab8500_btemp_props[] = { 1148c0984e5SSebastian Reichel POWER_SUPPLY_PROP_PRESENT, 1158c0984e5SSebastian Reichel POWER_SUPPLY_PROP_ONLINE, 1168c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TECHNOLOGY, 1178c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TEMP, 1188c0984e5SSebastian Reichel }; 1198c0984e5SSebastian Reichel 1208c0984e5SSebastian Reichel static LIST_HEAD(ab8500_btemp_list); 1218c0984e5SSebastian Reichel 1228c0984e5SSebastian Reichel /** 1238c0984e5SSebastian Reichel * ab8500_btemp_get() - returns a reference to the primary AB8500 BTEMP 1248c0984e5SSebastian Reichel * (i.e. the first BTEMP in the instance list) 1258c0984e5SSebastian Reichel */ 1268c0984e5SSebastian Reichel struct ab8500_btemp *ab8500_btemp_get(void) 1278c0984e5SSebastian Reichel { 12833237fb8SGustavo A. R. Silva return list_first_entry(&ab8500_btemp_list, struct ab8500_btemp, node); 1298c0984e5SSebastian Reichel } 1308c0984e5SSebastian Reichel EXPORT_SYMBOL(ab8500_btemp_get); 1318c0984e5SSebastian Reichel 1328c0984e5SSebastian Reichel /** 1338c0984e5SSebastian Reichel * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance 1348c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1358c0984e5SSebastian Reichel * @v_batctrl: measured batctrl voltage 1368c0984e5SSebastian Reichel * @inst_curr: measured instant current 1378c0984e5SSebastian Reichel * 1388c0984e5SSebastian Reichel * This function returns the battery resistance that is 1398c0984e5SSebastian Reichel * derived from the BATCTRL voltage. 1408c0984e5SSebastian Reichel * Returns value in Ohms. 1418c0984e5SSebastian Reichel */ 1428c0984e5SSebastian Reichel static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di, 1438c0984e5SSebastian Reichel int v_batctrl, int inst_curr) 1448c0984e5SSebastian Reichel { 1458c0984e5SSebastian Reichel int rbs; 1468c0984e5SSebastian Reichel 1478c0984e5SSebastian Reichel if (is_ab8500_1p1_or_earlier(di->parent)) { 1488c0984e5SSebastian Reichel /* 1498c0984e5SSebastian Reichel * For ABB cut1.0 and 1.1 BAT_CTRL is internally 1508c0984e5SSebastian Reichel * connected to 1.8V through a 450k resistor 1518c0984e5SSebastian Reichel */ 1528c0984e5SSebastian Reichel return (450000 * (v_batctrl)) / (1800 - v_batctrl); 1538c0984e5SSebastian Reichel } 1548c0984e5SSebastian Reichel 1558c0984e5SSebastian Reichel if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL) { 1568c0984e5SSebastian Reichel /* 1578c0984e5SSebastian Reichel * If the battery has internal NTC, we use the current 1588c0984e5SSebastian Reichel * source to calculate the resistance. 1598c0984e5SSebastian Reichel */ 1608c0984e5SSebastian Reichel rbs = (v_batctrl * 1000 1618c0984e5SSebastian Reichel - di->bm->gnd_lift_resistance * inst_curr) 1628c0984e5SSebastian Reichel / di->curr_source; 1638c0984e5SSebastian Reichel } else { 1648c0984e5SSebastian Reichel /* 1658c0984e5SSebastian Reichel * BAT_CTRL is internally 1668c0984e5SSebastian Reichel * connected to 1.8V through a 80k resistor 1678c0984e5SSebastian Reichel */ 1688c0984e5SSebastian Reichel rbs = (80000 * (v_batctrl)) / (1800 - v_batctrl); 1698c0984e5SSebastian Reichel } 1708c0984e5SSebastian Reichel 1718c0984e5SSebastian Reichel return rbs; 1728c0984e5SSebastian Reichel } 1738c0984e5SSebastian Reichel 1748c0984e5SSebastian Reichel /** 1758c0984e5SSebastian Reichel * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage 1768c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1778c0984e5SSebastian Reichel * 1788c0984e5SSebastian Reichel * This function returns the voltage on BATCTRL. Returns value in mV. 1798c0984e5SSebastian Reichel */ 1808c0984e5SSebastian Reichel static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di) 1818c0984e5SSebastian Reichel { 1820a8686e3SLinus Walleij int vbtemp, ret; 1838c0984e5SSebastian Reichel static int prev; 1848c0984e5SSebastian Reichel 1850a8686e3SLinus Walleij ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp); 1860a8686e3SLinus Walleij if (ret < 0) { 1878c0984e5SSebastian Reichel dev_err(di->dev, 1880a8686e3SLinus Walleij "%s ADC conversion failed, using previous value", 1898c0984e5SSebastian Reichel __func__); 1908c0984e5SSebastian Reichel return prev; 1918c0984e5SSebastian Reichel } 1928c0984e5SSebastian Reichel prev = vbtemp; 1938c0984e5SSebastian Reichel return vbtemp; 1948c0984e5SSebastian Reichel } 1958c0984e5SSebastian Reichel 1968c0984e5SSebastian Reichel /** 1978c0984e5SSebastian Reichel * ab8500_btemp_curr_source_enable() - enable/disable batctrl current source 1988c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 1998c0984e5SSebastian Reichel * @enable: enable or disable the current source 2008c0984e5SSebastian Reichel * 2018c0984e5SSebastian Reichel * Enable or disable the current sources for the BatCtrl AD channel 2028c0984e5SSebastian Reichel */ 2038c0984e5SSebastian Reichel static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di, 2048c0984e5SSebastian Reichel bool enable) 2058c0984e5SSebastian Reichel { 2068c0984e5SSebastian Reichel int curr; 2078c0984e5SSebastian Reichel int ret = 0; 2088c0984e5SSebastian Reichel 2098c0984e5SSebastian Reichel /* 2108c0984e5SSebastian Reichel * BATCTRL current sources are included on AB8500 cut2.0 2118c0984e5SSebastian Reichel * and future versions 2128c0984e5SSebastian Reichel */ 2138c0984e5SSebastian Reichel if (is_ab8500_1p1_or_earlier(di->parent)) 2148c0984e5SSebastian Reichel return 0; 2158c0984e5SSebastian Reichel 2168c0984e5SSebastian Reichel /* Only do this for batteries with internal NTC */ 2178c0984e5SSebastian Reichel if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && enable) { 2188c0984e5SSebastian Reichel 2198c0984e5SSebastian Reichel if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_7UA) 2208c0984e5SSebastian Reichel curr = BAT_CTRL_7U_ENA; 2218c0984e5SSebastian Reichel else 2228c0984e5SSebastian Reichel curr = BAT_CTRL_20U_ENA; 2238c0984e5SSebastian Reichel 2248c0984e5SSebastian Reichel dev_dbg(di->dev, "Set BATCTRL %duA\n", di->curr_source); 2258c0984e5SSebastian Reichel 2268c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible(di->dev, 2278c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 2288c0984e5SSebastian Reichel FORCE_BAT_CTRL_CMP_HIGH, FORCE_BAT_CTRL_CMP_HIGH); 2298c0984e5SSebastian Reichel if (ret) { 2308c0984e5SSebastian Reichel dev_err(di->dev, "%s failed setting cmp_force\n", 2318c0984e5SSebastian Reichel __func__); 2328c0984e5SSebastian Reichel return ret; 2338c0984e5SSebastian Reichel } 2348c0984e5SSebastian Reichel 2358c0984e5SSebastian Reichel /* 2368c0984e5SSebastian Reichel * We have to wait one 32kHz cycle before enabling 2378c0984e5SSebastian Reichel * the current source, since ForceBatCtrlCmpHigh needs 2388c0984e5SSebastian Reichel * to be written in a separate cycle 2398c0984e5SSebastian Reichel */ 2408c0984e5SSebastian Reichel udelay(32); 2418c0984e5SSebastian Reichel 2428c0984e5SSebastian Reichel ret = abx500_set_register_interruptible(di->dev, 2438c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 2448c0984e5SSebastian Reichel FORCE_BAT_CTRL_CMP_HIGH | curr); 2458c0984e5SSebastian Reichel if (ret) { 2468c0984e5SSebastian Reichel dev_err(di->dev, "%s failed enabling current source\n", 2478c0984e5SSebastian Reichel __func__); 2488c0984e5SSebastian Reichel goto disable_curr_source; 2498c0984e5SSebastian Reichel } 2508c0984e5SSebastian Reichel } else if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && !enable) { 2518c0984e5SSebastian Reichel dev_dbg(di->dev, "Disable BATCTRL curr source\n"); 2528c0984e5SSebastian Reichel 2538c0984e5SSebastian Reichel /* Write 0 to the curr bits */ 2548c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible( 2558c0984e5SSebastian Reichel di->dev, 2568c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 2578c0984e5SSebastian Reichel BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, 2588c0984e5SSebastian Reichel ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); 2598c0984e5SSebastian Reichel 2608c0984e5SSebastian Reichel if (ret) { 2618c0984e5SSebastian Reichel dev_err(di->dev, "%s failed disabling current source\n", 2628c0984e5SSebastian Reichel __func__); 2638c0984e5SSebastian Reichel goto disable_curr_source; 2648c0984e5SSebastian Reichel } 2658c0984e5SSebastian Reichel 2668c0984e5SSebastian Reichel /* Enable Pull-Up and comparator */ 2678c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible(di->dev, 2688c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 2698c0984e5SSebastian Reichel BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, 2708c0984e5SSebastian Reichel BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); 2718c0984e5SSebastian Reichel if (ret) { 2728c0984e5SSebastian Reichel dev_err(di->dev, "%s failed enabling PU and comp\n", 2738c0984e5SSebastian Reichel __func__); 2748c0984e5SSebastian Reichel goto enable_pu_comp; 2758c0984e5SSebastian Reichel } 2768c0984e5SSebastian Reichel 2778c0984e5SSebastian Reichel /* 2788c0984e5SSebastian Reichel * We have to wait one 32kHz cycle before disabling 2798c0984e5SSebastian Reichel * ForceBatCtrlCmpHigh since this needs to be written 2808c0984e5SSebastian Reichel * in a separate cycle 2818c0984e5SSebastian Reichel */ 2828c0984e5SSebastian Reichel udelay(32); 2838c0984e5SSebastian Reichel 2848c0984e5SSebastian Reichel /* Disable 'force comparator' */ 2858c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible(di->dev, 2868c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 2878c0984e5SSebastian Reichel FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); 2888c0984e5SSebastian Reichel if (ret) { 2898c0984e5SSebastian Reichel dev_err(di->dev, "%s failed disabling force comp\n", 2908c0984e5SSebastian Reichel __func__); 2918c0984e5SSebastian Reichel goto disable_force_comp; 2928c0984e5SSebastian Reichel } 2938c0984e5SSebastian Reichel } 2948c0984e5SSebastian Reichel return ret; 2958c0984e5SSebastian Reichel 2968c0984e5SSebastian Reichel /* 2978c0984e5SSebastian Reichel * We have to try unsetting FORCE_BAT_CTRL_CMP_HIGH one more time 2988c0984e5SSebastian Reichel * if we got an error above 2998c0984e5SSebastian Reichel */ 3008c0984e5SSebastian Reichel disable_curr_source: 3018c0984e5SSebastian Reichel /* Write 0 to the curr bits */ 3028c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible(di->dev, 3038c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 3048c0984e5SSebastian Reichel BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA, 3058c0984e5SSebastian Reichel ~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA)); 3068c0984e5SSebastian Reichel 3078c0984e5SSebastian Reichel if (ret) { 3088c0984e5SSebastian Reichel dev_err(di->dev, "%s failed disabling current source\n", 3098c0984e5SSebastian Reichel __func__); 3108c0984e5SSebastian Reichel return ret; 3118c0984e5SSebastian Reichel } 3128c0984e5SSebastian Reichel enable_pu_comp: 3138c0984e5SSebastian Reichel /* Enable Pull-Up and comparator */ 3148c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible(di->dev, 3158c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 3168c0984e5SSebastian Reichel BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA, 3178c0984e5SSebastian Reichel BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA); 3188c0984e5SSebastian Reichel if (ret) { 3198c0984e5SSebastian Reichel dev_err(di->dev, "%s failed enabling PU and comp\n", 3208c0984e5SSebastian Reichel __func__); 3218c0984e5SSebastian Reichel return ret; 3228c0984e5SSebastian Reichel } 3238c0984e5SSebastian Reichel 3248c0984e5SSebastian Reichel disable_force_comp: 3258c0984e5SSebastian Reichel /* 3268c0984e5SSebastian Reichel * We have to wait one 32kHz cycle before disabling 3278c0984e5SSebastian Reichel * ForceBatCtrlCmpHigh since this needs to be written 3288c0984e5SSebastian Reichel * in a separate cycle 3298c0984e5SSebastian Reichel */ 3308c0984e5SSebastian Reichel udelay(32); 3318c0984e5SSebastian Reichel 3328c0984e5SSebastian Reichel /* Disable 'force comparator' */ 3338c0984e5SSebastian Reichel ret = abx500_mask_and_set_register_interruptible(di->dev, 3348c0984e5SSebastian Reichel AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE, 3358c0984e5SSebastian Reichel FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH); 3368c0984e5SSebastian Reichel if (ret) { 3378c0984e5SSebastian Reichel dev_err(di->dev, "%s failed disabling force comp\n", 3388c0984e5SSebastian Reichel __func__); 3398c0984e5SSebastian Reichel return ret; 3408c0984e5SSebastian Reichel } 3418c0984e5SSebastian Reichel 3428c0984e5SSebastian Reichel return ret; 3438c0984e5SSebastian Reichel } 3448c0984e5SSebastian Reichel 3458c0984e5SSebastian Reichel /** 3468c0984e5SSebastian Reichel * ab8500_btemp_get_batctrl_res() - get battery resistance 3478c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 3488c0984e5SSebastian Reichel * 3498c0984e5SSebastian Reichel * This function returns the battery pack identification resistance. 3508c0984e5SSebastian Reichel * Returns value in Ohms. 3518c0984e5SSebastian Reichel */ 3528c0984e5SSebastian Reichel static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di) 3538c0984e5SSebastian Reichel { 3548c0984e5SSebastian Reichel int ret; 3558c0984e5SSebastian Reichel int batctrl = 0; 3568c0984e5SSebastian Reichel int res; 3578c0984e5SSebastian Reichel int inst_curr; 3588c0984e5SSebastian Reichel int i; 3598c0984e5SSebastian Reichel 3608c0984e5SSebastian Reichel /* 3618c0984e5SSebastian Reichel * BATCTRL current sources are included on AB8500 cut2.0 3628c0984e5SSebastian Reichel * and future versions 3638c0984e5SSebastian Reichel */ 3648c0984e5SSebastian Reichel ret = ab8500_btemp_curr_source_enable(di, true); 3658c0984e5SSebastian Reichel if (ret) { 3668c0984e5SSebastian Reichel dev_err(di->dev, "%s curr source enabled failed\n", __func__); 3678c0984e5SSebastian Reichel return ret; 3688c0984e5SSebastian Reichel } 3698c0984e5SSebastian Reichel 3708c0984e5SSebastian Reichel if (!di->fg) 3718c0984e5SSebastian Reichel di->fg = ab8500_fg_get(); 3728c0984e5SSebastian Reichel if (!di->fg) { 3738c0984e5SSebastian Reichel dev_err(di->dev, "No fg found\n"); 3748c0984e5SSebastian Reichel return -EINVAL; 3758c0984e5SSebastian Reichel } 3768c0984e5SSebastian Reichel 3778c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_start(di->fg); 3788c0984e5SSebastian Reichel 3798c0984e5SSebastian Reichel if (ret) { 3808c0984e5SSebastian Reichel dev_err(di->dev, "Failed to start current measurement\n"); 3818c0984e5SSebastian Reichel return ret; 3828c0984e5SSebastian Reichel } 3838c0984e5SSebastian Reichel 3848c0984e5SSebastian Reichel do { 3858c0984e5SSebastian Reichel msleep(20); 3868c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_started(di->fg)); 3878c0984e5SSebastian Reichel 3888c0984e5SSebastian Reichel i = 0; 3898c0984e5SSebastian Reichel 3908c0984e5SSebastian Reichel do { 3918c0984e5SSebastian Reichel batctrl += ab8500_btemp_read_batctrl_voltage(di); 3928c0984e5SSebastian Reichel i++; 3938c0984e5SSebastian Reichel msleep(20); 3948c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_done(di->fg)); 3958c0984e5SSebastian Reichel batctrl /= i; 3968c0984e5SSebastian Reichel 3978c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr); 3988c0984e5SSebastian Reichel if (ret) { 3998c0984e5SSebastian Reichel dev_err(di->dev, "Failed to finalize current measurement\n"); 4008c0984e5SSebastian Reichel return ret; 4018c0984e5SSebastian Reichel } 4028c0984e5SSebastian Reichel 4038c0984e5SSebastian Reichel res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr); 4048c0984e5SSebastian Reichel 4058c0984e5SSebastian Reichel ret = ab8500_btemp_curr_source_enable(di, false); 4068c0984e5SSebastian Reichel if (ret) { 4078c0984e5SSebastian Reichel dev_err(di->dev, "%s curr source disable failed\n", __func__); 4088c0984e5SSebastian Reichel return ret; 4098c0984e5SSebastian Reichel } 4108c0984e5SSebastian Reichel 4118c0984e5SSebastian Reichel dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n", 4128c0984e5SSebastian Reichel __func__, batctrl, res, inst_curr, i); 4138c0984e5SSebastian Reichel 4148c0984e5SSebastian Reichel return res; 4158c0984e5SSebastian Reichel } 4168c0984e5SSebastian Reichel 4178c0984e5SSebastian Reichel /** 4188c0984e5SSebastian Reichel * ab8500_btemp_res_to_temp() - resistance to temperature 4198c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 4208c0984e5SSebastian Reichel * @tbl: pointer to the resiatance to temperature table 4218c0984e5SSebastian Reichel * @tbl_size: size of the resistance to temperature table 4228c0984e5SSebastian Reichel * @res: resistance to calculate the temperature from 4238c0984e5SSebastian Reichel * 424c56ca24aSColin Ian King * This function returns the battery temperature in degrees Celsius 4258c0984e5SSebastian Reichel * based on the NTC resistance. 4268c0984e5SSebastian Reichel */ 4278c0984e5SSebastian Reichel static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di, 4288c0984e5SSebastian Reichel const struct abx500_res_to_temp *tbl, int tbl_size, int res) 4298c0984e5SSebastian Reichel { 43033237fb8SGustavo A. R. Silva int i; 4318c0984e5SSebastian Reichel /* 4328c0984e5SSebastian Reichel * Calculate the formula for the straight line 4338c0984e5SSebastian Reichel * Simple interpolation if we are within 4348c0984e5SSebastian Reichel * the resistance table limits, extrapolate 4358c0984e5SSebastian Reichel * if resistance is outside the limits. 4368c0984e5SSebastian Reichel */ 4378c0984e5SSebastian Reichel if (res > tbl[0].resist) 4388c0984e5SSebastian Reichel i = 0; 4398c0984e5SSebastian Reichel else if (res <= tbl[tbl_size - 1].resist) 4408c0984e5SSebastian Reichel i = tbl_size - 2; 4418c0984e5SSebastian Reichel else { 4428c0984e5SSebastian Reichel i = 0; 4438c0984e5SSebastian Reichel while (!(res <= tbl[i].resist && 4448c0984e5SSebastian Reichel res > tbl[i + 1].resist)) 4458c0984e5SSebastian Reichel i++; 4468c0984e5SSebastian Reichel } 4478c0984e5SSebastian Reichel 44833237fb8SGustavo A. R. Silva return tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) * 4498c0984e5SSebastian Reichel (res - tbl[i].resist)) / (tbl[i + 1].resist - tbl[i].resist); 4508c0984e5SSebastian Reichel } 4518c0984e5SSebastian Reichel 4528c0984e5SSebastian Reichel /** 4538c0984e5SSebastian Reichel * ab8500_btemp_measure_temp() - measure battery temperature 4548c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 4558c0984e5SSebastian Reichel * 4568c0984e5SSebastian Reichel * Returns battery temperature (on success) else the previous temperature 4578c0984e5SSebastian Reichel */ 4588c0984e5SSebastian Reichel static int ab8500_btemp_measure_temp(struct ab8500_btemp *di) 4598c0984e5SSebastian Reichel { 4600a8686e3SLinus Walleij int temp, ret; 4618c0984e5SSebastian Reichel static int prev; 4628c0984e5SSebastian Reichel int rbat, rntc, vntc; 4638c0984e5SSebastian Reichel u8 id; 4648c0984e5SSebastian Reichel 4658c0984e5SSebastian Reichel id = di->bm->batt_id; 4668c0984e5SSebastian Reichel 4678c0984e5SSebastian Reichel if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && 4688c0984e5SSebastian Reichel id != BATTERY_UNKNOWN) { 4698c0984e5SSebastian Reichel 4708c0984e5SSebastian Reichel rbat = ab8500_btemp_get_batctrl_res(di); 4718c0984e5SSebastian Reichel if (rbat < 0) { 4728c0984e5SSebastian Reichel dev_err(di->dev, "%s get batctrl res failed\n", 4738c0984e5SSebastian Reichel __func__); 4748c0984e5SSebastian Reichel /* 4758c0984e5SSebastian Reichel * Return out-of-range temperature so that 4768c0984e5SSebastian Reichel * charging is stopped 4778c0984e5SSebastian Reichel */ 4788c0984e5SSebastian Reichel return BTEMP_THERMAL_LOW_LIMIT; 4798c0984e5SSebastian Reichel } 4808c0984e5SSebastian Reichel 4818c0984e5SSebastian Reichel temp = ab8500_btemp_res_to_temp(di, 4828c0984e5SSebastian Reichel di->bm->bat_type[id].r_to_t_tbl, 4838c0984e5SSebastian Reichel di->bm->bat_type[id].n_temp_tbl_elements, rbat); 4848c0984e5SSebastian Reichel } else { 4850a8686e3SLinus Walleij ret = iio_read_channel_processed(di->btemp_ball, &vntc); 4860a8686e3SLinus Walleij if (ret < 0) { 4878c0984e5SSebastian Reichel dev_err(di->dev, 4880a8686e3SLinus Walleij "%s ADC conversion failed," 4898c0984e5SSebastian Reichel " using previous value\n", __func__); 4908c0984e5SSebastian Reichel return prev; 4918c0984e5SSebastian Reichel } 4928c0984e5SSebastian Reichel /* 4938c0984e5SSebastian Reichel * The PCB NTC is sourced from VTVOUT via a 230kOhm 4948c0984e5SSebastian Reichel * resistor. 4958c0984e5SSebastian Reichel */ 4968c0984e5SSebastian Reichel rntc = 230000 * vntc / (VTVOUT_V - vntc); 4978c0984e5SSebastian Reichel 4988c0984e5SSebastian Reichel temp = ab8500_btemp_res_to_temp(di, 4998c0984e5SSebastian Reichel di->bm->bat_type[id].r_to_t_tbl, 5008c0984e5SSebastian Reichel di->bm->bat_type[id].n_temp_tbl_elements, rntc); 5018c0984e5SSebastian Reichel prev = temp; 5028c0984e5SSebastian Reichel } 5038c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is %d\n", temp); 5048c0984e5SSebastian Reichel return temp; 5058c0984e5SSebastian Reichel } 5068c0984e5SSebastian Reichel 5078c0984e5SSebastian Reichel /** 5088c0984e5SSebastian Reichel * ab8500_btemp_id() - Identify the connected battery 5098c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 5108c0984e5SSebastian Reichel * 5118c0984e5SSebastian Reichel * This function will try to identify the battery by reading the ID 5128c0984e5SSebastian Reichel * resistor. Some brands use a combined ID resistor with a NTC resistor to 5138c0984e5SSebastian Reichel * both be able to identify and to read the temperature of it. 5148c0984e5SSebastian Reichel */ 5158c0984e5SSebastian Reichel static int ab8500_btemp_id(struct ab8500_btemp *di) 5168c0984e5SSebastian Reichel { 5178c0984e5SSebastian Reichel int res; 5188c0984e5SSebastian Reichel u8 i; 5198c0984e5SSebastian Reichel 5204c4268dcSLinus Walleij di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA; 5218c0984e5SSebastian Reichel di->bm->batt_id = BATTERY_UNKNOWN; 5228c0984e5SSebastian Reichel 5238c0984e5SSebastian Reichel res = ab8500_btemp_get_batctrl_res(di); 5248c0984e5SSebastian Reichel if (res < 0) { 5258c0984e5SSebastian Reichel dev_err(di->dev, "%s get batctrl res failed\n", __func__); 5268c0984e5SSebastian Reichel return -ENXIO; 5278c0984e5SSebastian Reichel } 5288c0984e5SSebastian Reichel 5298c0984e5SSebastian Reichel /* BATTERY_UNKNOWN is defined on position 0, skip it! */ 5308c0984e5SSebastian Reichel for (i = BATTERY_UNKNOWN + 1; i < di->bm->n_btypes; i++) { 5318c0984e5SSebastian Reichel if ((res <= di->bm->bat_type[i].resis_high) && 5328c0984e5SSebastian Reichel (res >= di->bm->bat_type[i].resis_low)) { 5338c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery detected on %s" 5348c0984e5SSebastian Reichel " low %d < res %d < high: %d" 5358c0984e5SSebastian Reichel " index: %d\n", 5368c0984e5SSebastian Reichel di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL ? 5378c0984e5SSebastian Reichel "BATCTRL" : "BATTEMP", 5388c0984e5SSebastian Reichel di->bm->bat_type[i].resis_low, res, 5398c0984e5SSebastian Reichel di->bm->bat_type[i].resis_high, i); 5408c0984e5SSebastian Reichel 5418c0984e5SSebastian Reichel di->bm->batt_id = i; 5428c0984e5SSebastian Reichel break; 5438c0984e5SSebastian Reichel } 5448c0984e5SSebastian Reichel } 5458c0984e5SSebastian Reichel 5468c0984e5SSebastian Reichel if (di->bm->batt_id == BATTERY_UNKNOWN) { 5478c0984e5SSebastian Reichel dev_warn(di->dev, "Battery identified as unknown" 5488c0984e5SSebastian Reichel ", resistance %d Ohm\n", res); 5498c0984e5SSebastian Reichel return -ENXIO; 5508c0984e5SSebastian Reichel } 5518c0984e5SSebastian Reichel 5528c0984e5SSebastian Reichel /* 5538c0984e5SSebastian Reichel * We only have to change current source if the 5548c0984e5SSebastian Reichel * detected type is Type 1. 5558c0984e5SSebastian Reichel */ 5568c0984e5SSebastian Reichel if (di->bm->adc_therm == ABx500_ADC_THERM_BATCTRL && 5578c0984e5SSebastian Reichel di->bm->batt_id == 1) { 5588c0984e5SSebastian Reichel dev_dbg(di->dev, "Set BATCTRL current source to 20uA\n"); 5598c0984e5SSebastian Reichel di->curr_source = BTEMP_BATCTRL_CURR_SRC_20UA; 5608c0984e5SSebastian Reichel } 5618c0984e5SSebastian Reichel 5628c0984e5SSebastian Reichel return di->bm->batt_id; 5638c0984e5SSebastian Reichel } 5648c0984e5SSebastian Reichel 5658c0984e5SSebastian Reichel /** 5668c0984e5SSebastian Reichel * ab8500_btemp_periodic_work() - Measuring the temperature periodically 5678c0984e5SSebastian Reichel * @work: pointer to the work_struct structure 5688c0984e5SSebastian Reichel * 5698c0984e5SSebastian Reichel * Work function for measuring the temperature periodically 5708c0984e5SSebastian Reichel */ 5718c0984e5SSebastian Reichel static void ab8500_btemp_periodic_work(struct work_struct *work) 5728c0984e5SSebastian Reichel { 5738c0984e5SSebastian Reichel int interval; 5748c0984e5SSebastian Reichel int bat_temp; 5758c0984e5SSebastian Reichel struct ab8500_btemp *di = container_of(work, 5768c0984e5SSebastian Reichel struct ab8500_btemp, btemp_periodic_work.work); 5778c0984e5SSebastian Reichel 5788c0984e5SSebastian Reichel if (!di->initialized) { 5798c0984e5SSebastian Reichel /* Identify the battery */ 5808c0984e5SSebastian Reichel if (ab8500_btemp_id(di) < 0) 5818c0984e5SSebastian Reichel dev_warn(di->dev, "failed to identify the battery\n"); 5828c0984e5SSebastian Reichel } 5838c0984e5SSebastian Reichel 5848c0984e5SSebastian Reichel bat_temp = ab8500_btemp_measure_temp(di); 5858c0984e5SSebastian Reichel /* 5868c0984e5SSebastian Reichel * Filter battery temperature. 5878c0984e5SSebastian Reichel * Allow direct updates on temperature only if two samples result in 5888c0984e5SSebastian Reichel * same temperature. Else only allow 1 degree change from previous 5898c0984e5SSebastian Reichel * reported value in the direction of the new measurement. 5908c0984e5SSebastian Reichel */ 5918c0984e5SSebastian Reichel if ((bat_temp == di->prev_bat_temp) || !di->initialized) { 5928c0984e5SSebastian Reichel if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) { 5938c0984e5SSebastian Reichel di->initialized = true; 5948c0984e5SSebastian Reichel di->bat_temp = bat_temp; 5958c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 5968c0984e5SSebastian Reichel } 5978c0984e5SSebastian Reichel } else if (bat_temp < di->prev_bat_temp) { 5988c0984e5SSebastian Reichel di->bat_temp--; 5998c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 6008c0984e5SSebastian Reichel } else if (bat_temp > di->prev_bat_temp) { 6018c0984e5SSebastian Reichel di->bat_temp++; 6028c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 6038c0984e5SSebastian Reichel } 6048c0984e5SSebastian Reichel di->prev_bat_temp = bat_temp; 6058c0984e5SSebastian Reichel 6068c0984e5SSebastian Reichel if (di->events.ac_conn || di->events.usb_conn) 6078c0984e5SSebastian Reichel interval = di->bm->temp_interval_chg; 6088c0984e5SSebastian Reichel else 6098c0984e5SSebastian Reichel interval = di->bm->temp_interval_nochg; 6108c0984e5SSebastian Reichel 6118c0984e5SSebastian Reichel /* Schedule a new measurement */ 6128c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, 6138c0984e5SSebastian Reichel &di->btemp_periodic_work, 6148c0984e5SSebastian Reichel round_jiffies(interval * HZ)); 6158c0984e5SSebastian Reichel } 6168c0984e5SSebastian Reichel 6178c0984e5SSebastian Reichel /** 6188c0984e5SSebastian Reichel * ab8500_btemp_batctrlindb_handler() - battery removal detected 6198c0984e5SSebastian Reichel * @irq: interrupt number 6208c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 6218c0984e5SSebastian Reichel * 6228c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 6238c0984e5SSebastian Reichel */ 6248c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di) 6258c0984e5SSebastian Reichel { 6268c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 6278c0984e5SSebastian Reichel dev_err(di->dev, "Battery removal detected!\n"); 6288c0984e5SSebastian Reichel 6298c0984e5SSebastian Reichel di->events.batt_rem = true; 6308c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 6318c0984e5SSebastian Reichel 6328c0984e5SSebastian Reichel return IRQ_HANDLED; 6338c0984e5SSebastian Reichel } 6348c0984e5SSebastian Reichel 6358c0984e5SSebastian Reichel /** 6368c0984e5SSebastian Reichel * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees 6378c0984e5SSebastian Reichel * @irq: interrupt number 6388c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 6398c0984e5SSebastian Reichel * 6408c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 6418c0984e5SSebastian Reichel */ 6428c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di) 6438c0984e5SSebastian Reichel { 6448c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 6458c0984e5SSebastian Reichel 6468c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) { 6478c0984e5SSebastian Reichel dev_dbg(di->dev, "Ignore false btemp low irq" 6488c0984e5SSebastian Reichel " for ABB cut 1.0, 1.1, 2.0 and 3.3\n"); 6498c0984e5SSebastian Reichel } else { 6508c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature lower than -10deg c\n"); 6518c0984e5SSebastian Reichel 6528c0984e5SSebastian Reichel di->events.btemp_low = true; 6538c0984e5SSebastian Reichel di->events.btemp_high = false; 6548c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 6558c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 6568c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 6578c0984e5SSebastian Reichel } 6588c0984e5SSebastian Reichel 6598c0984e5SSebastian Reichel return IRQ_HANDLED; 6608c0984e5SSebastian Reichel } 6618c0984e5SSebastian Reichel 6628c0984e5SSebastian Reichel /** 6638c0984e5SSebastian Reichel * ab8500_btemp_temphigh_handler() - battery temp higher than max temp 6648c0984e5SSebastian Reichel * @irq: interrupt number 6658c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 6668c0984e5SSebastian Reichel * 6678c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 6688c0984e5SSebastian Reichel */ 6698c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di) 6708c0984e5SSebastian Reichel { 6718c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 6728c0984e5SSebastian Reichel 6738c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature is higher than MAX temp\n"); 6748c0984e5SSebastian Reichel 6758c0984e5SSebastian Reichel di->events.btemp_high = true; 6768c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 6778c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 6788c0984e5SSebastian Reichel di->events.btemp_low = false; 6798c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 6808c0984e5SSebastian Reichel 6818c0984e5SSebastian Reichel return IRQ_HANDLED; 6828c0984e5SSebastian Reichel } 6838c0984e5SSebastian Reichel 6848c0984e5SSebastian Reichel /** 6858c0984e5SSebastian Reichel * ab8500_btemp_lowmed_handler() - battery temp between low and medium 6868c0984e5SSebastian Reichel * @irq: interrupt number 6878c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 6888c0984e5SSebastian Reichel * 6898c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 6908c0984e5SSebastian Reichel */ 6918c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di) 6928c0984e5SSebastian Reichel { 6938c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 6948c0984e5SSebastian Reichel 6958c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between low and medium\n"); 6968c0984e5SSebastian Reichel 6978c0984e5SSebastian Reichel di->events.btemp_lowmed = true; 6988c0984e5SSebastian Reichel di->events.btemp_medhigh = false; 6998c0984e5SSebastian Reichel di->events.btemp_high = false; 7008c0984e5SSebastian Reichel di->events.btemp_low = false; 7018c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 7028c0984e5SSebastian Reichel 7038c0984e5SSebastian Reichel return IRQ_HANDLED; 7048c0984e5SSebastian Reichel } 7058c0984e5SSebastian Reichel 7068c0984e5SSebastian Reichel /** 7078c0984e5SSebastian Reichel * ab8500_btemp_medhigh_handler() - battery temp between medium and high 7088c0984e5SSebastian Reichel * @irq: interrupt number 7098c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp 7108c0984e5SSebastian Reichel * 7118c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED) 7128c0984e5SSebastian Reichel */ 7138c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di) 7148c0984e5SSebastian Reichel { 7158c0984e5SSebastian Reichel struct ab8500_btemp *di = _di; 7168c0984e5SSebastian Reichel 7178c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between medium and high\n"); 7188c0984e5SSebastian Reichel 7198c0984e5SSebastian Reichel di->events.btemp_medhigh = true; 7208c0984e5SSebastian Reichel di->events.btemp_lowmed = false; 7218c0984e5SSebastian Reichel di->events.btemp_high = false; 7228c0984e5SSebastian Reichel di->events.btemp_low = false; 7238c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy); 7248c0984e5SSebastian Reichel 7258c0984e5SSebastian Reichel return IRQ_HANDLED; 7268c0984e5SSebastian Reichel } 7278c0984e5SSebastian Reichel 7288c0984e5SSebastian Reichel /** 7298c0984e5SSebastian Reichel * ab8500_btemp_periodic() - Periodic temperature measurements 7308c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 7318c0984e5SSebastian Reichel * @enable: enable or disable periodic temperature measurements 7328c0984e5SSebastian Reichel * 7338c0984e5SSebastian Reichel * Starts of stops periodic temperature measurements. Periodic measurements 7348c0984e5SSebastian Reichel * should only be done when a charger is connected. 7358c0984e5SSebastian Reichel */ 7368c0984e5SSebastian Reichel static void ab8500_btemp_periodic(struct ab8500_btemp *di, 7378c0984e5SSebastian Reichel bool enable) 7388c0984e5SSebastian Reichel { 7398c0984e5SSebastian Reichel dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n", 7408c0984e5SSebastian Reichel enable); 7418c0984e5SSebastian Reichel /* 7428c0984e5SSebastian Reichel * Make sure a new measurement is done directly by cancelling 7438c0984e5SSebastian Reichel * any pending work 7448c0984e5SSebastian Reichel */ 7458c0984e5SSebastian Reichel cancel_delayed_work_sync(&di->btemp_periodic_work); 7468c0984e5SSebastian Reichel 7478c0984e5SSebastian Reichel if (enable) 7488c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0); 7498c0984e5SSebastian Reichel } 7508c0984e5SSebastian Reichel 7518c0984e5SSebastian Reichel /** 7528c0984e5SSebastian Reichel * ab8500_btemp_get_temp() - get battery temperature 7538c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure 7548c0984e5SSebastian Reichel * 7558c0984e5SSebastian Reichel * Returns battery temperature 7568c0984e5SSebastian Reichel */ 7578c0984e5SSebastian Reichel int ab8500_btemp_get_temp(struct ab8500_btemp *di) 7588c0984e5SSebastian Reichel { 7598c0984e5SSebastian Reichel int temp = 0; 7608c0984e5SSebastian Reichel 7618c0984e5SSebastian Reichel /* 7628c0984e5SSebastian Reichel * The BTEMP events are not reliabe on AB8500 cut3.3 7638c0984e5SSebastian Reichel * and prior versions 7648c0984e5SSebastian Reichel */ 7658c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) { 7668c0984e5SSebastian Reichel temp = di->bat_temp * 10; 7678c0984e5SSebastian Reichel } else { 7688c0984e5SSebastian Reichel if (di->events.btemp_low) { 7698c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_low_limit) 7708c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_low_limit * 10; 7718c0984e5SSebastian Reichel else 7728c0984e5SSebastian Reichel temp = di->bat_temp * 10; 7738c0984e5SSebastian Reichel } else if (di->events.btemp_high) { 7748c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_high_limit) 7758c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_high_limit * 10; 7768c0984e5SSebastian Reichel else 7778c0984e5SSebastian Reichel temp = di->bat_temp * 10; 7788c0984e5SSebastian Reichel } else if (di->events.btemp_lowmed) { 7798c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_med_limit) 7808c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10; 7818c0984e5SSebastian Reichel else 7828c0984e5SSebastian Reichel temp = di->bat_temp * 10; 7838c0984e5SSebastian Reichel } else if (di->events.btemp_medhigh) { 7848c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_med_limit) 7858c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10; 7868c0984e5SSebastian Reichel else 7878c0984e5SSebastian Reichel temp = di->bat_temp * 10; 7888c0984e5SSebastian Reichel } else 7898c0984e5SSebastian Reichel temp = di->bat_temp * 10; 7908c0984e5SSebastian Reichel } 7918c0984e5SSebastian Reichel return temp; 7928c0984e5SSebastian Reichel } 7938c0984e5SSebastian Reichel EXPORT_SYMBOL(ab8500_btemp_get_temp); 7948c0984e5SSebastian Reichel 7958c0984e5SSebastian Reichel /** 7968c0984e5SSebastian Reichel * ab8500_btemp_get_batctrl_temp() - get the temperature 7978c0984e5SSebastian Reichel * @btemp: pointer to the btemp structure 7988c0984e5SSebastian Reichel * 7998c0984e5SSebastian Reichel * Returns the batctrl temperature in millidegrees 8008c0984e5SSebastian Reichel */ 8018c0984e5SSebastian Reichel int ab8500_btemp_get_batctrl_temp(struct ab8500_btemp *btemp) 8028c0984e5SSebastian Reichel { 8038c0984e5SSebastian Reichel return btemp->bat_temp * 1000; 8048c0984e5SSebastian Reichel } 8058c0984e5SSebastian Reichel EXPORT_SYMBOL(ab8500_btemp_get_batctrl_temp); 8068c0984e5SSebastian Reichel 8078c0984e5SSebastian Reichel /** 8088c0984e5SSebastian Reichel * ab8500_btemp_get_property() - get the btemp properties 8098c0984e5SSebastian Reichel * @psy: pointer to the power_supply structure 8108c0984e5SSebastian Reichel * @psp: pointer to the power_supply_property structure 8118c0984e5SSebastian Reichel * @val: pointer to the power_supply_propval union 8128c0984e5SSebastian Reichel * 8138c0984e5SSebastian Reichel * This function gets called when an application tries to get the btemp 8148c0984e5SSebastian Reichel * properties by reading the sysfs files. 8158c0984e5SSebastian Reichel * online: presence of the battery 8168c0984e5SSebastian Reichel * present: presence of the battery 8178c0984e5SSebastian Reichel * technology: battery technology 8188c0984e5SSebastian Reichel * temp: battery temperature 8198c0984e5SSebastian Reichel * Returns error code in case of failure else 0(on success) 8208c0984e5SSebastian Reichel */ 8218c0984e5SSebastian Reichel static int ab8500_btemp_get_property(struct power_supply *psy, 8228c0984e5SSebastian Reichel enum power_supply_property psp, 8238c0984e5SSebastian Reichel union power_supply_propval *val) 8248c0984e5SSebastian Reichel { 8258c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy); 8268c0984e5SSebastian Reichel 8278c0984e5SSebastian Reichel switch (psp) { 8288c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT: 8298c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_ONLINE: 8308c0984e5SSebastian Reichel if (di->events.batt_rem) 8318c0984e5SSebastian Reichel val->intval = 0; 8328c0984e5SSebastian Reichel else 8338c0984e5SSebastian Reichel val->intval = 1; 8348c0984e5SSebastian Reichel break; 8358c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TECHNOLOGY: 8368c0984e5SSebastian Reichel val->intval = di->bm->bat_type[di->bm->batt_id].name; 8378c0984e5SSebastian Reichel break; 8388c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TEMP: 8398c0984e5SSebastian Reichel val->intval = ab8500_btemp_get_temp(di); 8408c0984e5SSebastian Reichel break; 8418c0984e5SSebastian Reichel default: 8428c0984e5SSebastian Reichel return -EINVAL; 8438c0984e5SSebastian Reichel } 8448c0984e5SSebastian Reichel return 0; 8458c0984e5SSebastian Reichel } 8468c0984e5SSebastian Reichel 8478c0984e5SSebastian Reichel static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data) 8488c0984e5SSebastian Reichel { 8498c0984e5SSebastian Reichel struct power_supply *psy; 8508c0984e5SSebastian Reichel struct power_supply *ext = dev_get_drvdata(dev); 8518c0984e5SSebastian Reichel const char **supplicants = (const char **)ext->supplied_to; 8528c0984e5SSebastian Reichel struct ab8500_btemp *di; 8538c0984e5SSebastian Reichel union power_supply_propval ret; 8548c0984e5SSebastian Reichel int j; 8558c0984e5SSebastian Reichel 8568c0984e5SSebastian Reichel psy = (struct power_supply *)data; 8578c0984e5SSebastian Reichel di = power_supply_get_drvdata(psy); 8588c0984e5SSebastian Reichel 8598c0984e5SSebastian Reichel /* 8608c0984e5SSebastian Reichel * For all psy where the name of your driver 8618c0984e5SSebastian Reichel * appears in any supplied_to 8628c0984e5SSebastian Reichel */ 8638c0984e5SSebastian Reichel j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 8648c0984e5SSebastian Reichel if (j < 0) 8658c0984e5SSebastian Reichel return 0; 8668c0984e5SSebastian Reichel 8678c0984e5SSebastian Reichel /* Go through all properties for the psy */ 8688c0984e5SSebastian Reichel for (j = 0; j < ext->desc->num_properties; j++) { 8698c0984e5SSebastian Reichel enum power_supply_property prop; 8708c0984e5SSebastian Reichel prop = ext->desc->properties[j]; 8718c0984e5SSebastian Reichel 8728c0984e5SSebastian Reichel if (power_supply_get_property(ext, prop, &ret)) 8738c0984e5SSebastian Reichel continue; 8748c0984e5SSebastian Reichel 8758c0984e5SSebastian Reichel switch (prop) { 8768c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT: 8778c0984e5SSebastian Reichel switch (ext->desc->type) { 8788c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_MAINS: 8798c0984e5SSebastian Reichel /* AC disconnected */ 8808c0984e5SSebastian Reichel if (!ret.intval && di->events.ac_conn) { 8818c0984e5SSebastian Reichel di->events.ac_conn = false; 8828c0984e5SSebastian Reichel } 8838c0984e5SSebastian Reichel /* AC connected */ 8848c0984e5SSebastian Reichel else if (ret.intval && !di->events.ac_conn) { 8858c0984e5SSebastian Reichel di->events.ac_conn = true; 8868c0984e5SSebastian Reichel if (!di->events.usb_conn) 8878c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 8888c0984e5SSebastian Reichel } 8898c0984e5SSebastian Reichel break; 8908c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_USB: 8918c0984e5SSebastian Reichel /* USB disconnected */ 8928c0984e5SSebastian Reichel if (!ret.intval && di->events.usb_conn) { 8938c0984e5SSebastian Reichel di->events.usb_conn = false; 8948c0984e5SSebastian Reichel } 8958c0984e5SSebastian Reichel /* USB connected */ 8968c0984e5SSebastian Reichel else if (ret.intval && !di->events.usb_conn) { 8978c0984e5SSebastian Reichel di->events.usb_conn = true; 8988c0984e5SSebastian Reichel if (!di->events.ac_conn) 8998c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 9008c0984e5SSebastian Reichel } 9018c0984e5SSebastian Reichel break; 9028c0984e5SSebastian Reichel default: 9038c0984e5SSebastian Reichel break; 9048c0984e5SSebastian Reichel } 9058c0984e5SSebastian Reichel break; 9068c0984e5SSebastian Reichel default: 9078c0984e5SSebastian Reichel break; 9088c0984e5SSebastian Reichel } 9098c0984e5SSebastian Reichel } 9108c0984e5SSebastian Reichel return 0; 9118c0984e5SSebastian Reichel } 9128c0984e5SSebastian Reichel 9138c0984e5SSebastian Reichel /** 9148c0984e5SSebastian Reichel * ab8500_btemp_external_power_changed() - callback for power supply changes 9158c0984e5SSebastian Reichel * @psy: pointer to the structure power_supply 9168c0984e5SSebastian Reichel * 9178c0984e5SSebastian Reichel * This function is pointing to the function pointer external_power_changed 9188c0984e5SSebastian Reichel * of the structure power_supply. 9198c0984e5SSebastian Reichel * This function gets executed when there is a change in the external power 9208c0984e5SSebastian Reichel * supply to the btemp. 9218c0984e5SSebastian Reichel */ 9228c0984e5SSebastian Reichel static void ab8500_btemp_external_power_changed(struct power_supply *psy) 9238c0984e5SSebastian Reichel { 9248c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy); 9258c0984e5SSebastian Reichel 9268c0984e5SSebastian Reichel class_for_each_device(power_supply_class, NULL, 9278c0984e5SSebastian Reichel di->btemp_psy, ab8500_btemp_get_ext_psy_data); 9288c0984e5SSebastian Reichel } 9298c0984e5SSebastian Reichel 9308c0984e5SSebastian Reichel /* ab8500 btemp driver interrupts and their respective isr */ 9318c0984e5SSebastian Reichel static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = { 9328c0984e5SSebastian Reichel {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler}, 9338c0984e5SSebastian Reichel {"BTEMP_LOW", ab8500_btemp_templow_handler}, 9348c0984e5SSebastian Reichel {"BTEMP_HIGH", ab8500_btemp_temphigh_handler}, 9358c0984e5SSebastian Reichel {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler}, 9368c0984e5SSebastian Reichel {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler}, 9378c0984e5SSebastian Reichel }; 9388c0984e5SSebastian Reichel 9398c0984e5SSebastian Reichel #if defined(CONFIG_PM) 9408c0984e5SSebastian Reichel static int ab8500_btemp_resume(struct platform_device *pdev) 9418c0984e5SSebastian Reichel { 9428c0984e5SSebastian Reichel struct ab8500_btemp *di = platform_get_drvdata(pdev); 9438c0984e5SSebastian Reichel 9448c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 9458c0984e5SSebastian Reichel 9468c0984e5SSebastian Reichel return 0; 9478c0984e5SSebastian Reichel } 9488c0984e5SSebastian Reichel 9498c0984e5SSebastian Reichel static int ab8500_btemp_suspend(struct platform_device *pdev, 9508c0984e5SSebastian Reichel pm_message_t state) 9518c0984e5SSebastian Reichel { 9528c0984e5SSebastian Reichel struct ab8500_btemp *di = platform_get_drvdata(pdev); 9538c0984e5SSebastian Reichel 9548c0984e5SSebastian Reichel ab8500_btemp_periodic(di, false); 9558c0984e5SSebastian Reichel 9568c0984e5SSebastian Reichel return 0; 9578c0984e5SSebastian Reichel } 9588c0984e5SSebastian Reichel #else 9598c0984e5SSebastian Reichel #define ab8500_btemp_suspend NULL 9608c0984e5SSebastian Reichel #define ab8500_btemp_resume NULL 9618c0984e5SSebastian Reichel #endif 9628c0984e5SSebastian Reichel 9638c0984e5SSebastian Reichel static int ab8500_btemp_remove(struct platform_device *pdev) 9648c0984e5SSebastian Reichel { 9658c0984e5SSebastian Reichel struct ab8500_btemp *di = platform_get_drvdata(pdev); 9668c0984e5SSebastian Reichel int i, irq; 9678c0984e5SSebastian Reichel 9688c0984e5SSebastian Reichel /* Disable interrupts */ 9698c0984e5SSebastian Reichel for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { 9708c0984e5SSebastian Reichel irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); 9718c0984e5SSebastian Reichel free_irq(irq, di); 9728c0984e5SSebastian Reichel } 9738c0984e5SSebastian Reichel 9748c0984e5SSebastian Reichel /* Delete the work queue */ 9758c0984e5SSebastian Reichel destroy_workqueue(di->btemp_wq); 9768c0984e5SSebastian Reichel 9778c0984e5SSebastian Reichel flush_scheduled_work(); 9788c0984e5SSebastian Reichel power_supply_unregister(di->btemp_psy); 9798c0984e5SSebastian Reichel 9808c0984e5SSebastian Reichel return 0; 9818c0984e5SSebastian Reichel } 9828c0984e5SSebastian Reichel 9838c0984e5SSebastian Reichel static char *supply_interface[] = { 9848c0984e5SSebastian Reichel "ab8500_chargalg", 9858c0984e5SSebastian Reichel "ab8500_fg", 9868c0984e5SSebastian Reichel }; 9878c0984e5SSebastian Reichel 9888c0984e5SSebastian Reichel static const struct power_supply_desc ab8500_btemp_desc = { 9898c0984e5SSebastian Reichel .name = "ab8500_btemp", 9908c0984e5SSebastian Reichel .type = POWER_SUPPLY_TYPE_BATTERY, 9918c0984e5SSebastian Reichel .properties = ab8500_btemp_props, 9928c0984e5SSebastian Reichel .num_properties = ARRAY_SIZE(ab8500_btemp_props), 9938c0984e5SSebastian Reichel .get_property = ab8500_btemp_get_property, 9948c0984e5SSebastian Reichel .external_power_changed = ab8500_btemp_external_power_changed, 9958c0984e5SSebastian Reichel }; 9968c0984e5SSebastian Reichel 9978c0984e5SSebastian Reichel static int ab8500_btemp_probe(struct platform_device *pdev) 9988c0984e5SSebastian Reichel { 9998c0984e5SSebastian Reichel struct device_node *np = pdev->dev.of_node; 10008c0984e5SSebastian Reichel struct abx500_bm_data *plat = pdev->dev.platform_data; 10018c0984e5SSebastian Reichel struct power_supply_config psy_cfg = {}; 10028c0984e5SSebastian Reichel struct ab8500_btemp *di; 10038c0984e5SSebastian Reichel int irq, i, ret = 0; 10048c0984e5SSebastian Reichel u8 val; 10058c0984e5SSebastian Reichel 10068c0984e5SSebastian Reichel di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); 10078c0984e5SSebastian Reichel if (!di) { 10088c0984e5SSebastian Reichel dev_err(&pdev->dev, "%s no mem for ab8500_btemp\n", __func__); 10098c0984e5SSebastian Reichel return -ENOMEM; 10108c0984e5SSebastian Reichel } 10118c0984e5SSebastian Reichel 10128c0984e5SSebastian Reichel if (!plat) { 10138c0984e5SSebastian Reichel dev_err(&pdev->dev, "no battery management data supplied\n"); 10148c0984e5SSebastian Reichel return -EINVAL; 10158c0984e5SSebastian Reichel } 10168c0984e5SSebastian Reichel di->bm = plat; 10178c0984e5SSebastian Reichel 10188c0984e5SSebastian Reichel if (np) { 10198c0984e5SSebastian Reichel ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm); 10208c0984e5SSebastian Reichel if (ret) { 10218c0984e5SSebastian Reichel dev_err(&pdev->dev, "failed to get battery information\n"); 10228c0984e5SSebastian Reichel return ret; 10238c0984e5SSebastian Reichel } 10248c0984e5SSebastian Reichel } 10258c0984e5SSebastian Reichel 10268c0984e5SSebastian Reichel /* get parent data */ 10278c0984e5SSebastian Reichel di->dev = &pdev->dev; 10288c0984e5SSebastian Reichel di->parent = dev_get_drvdata(pdev->dev.parent); 10290a8686e3SLinus Walleij 10300a8686e3SLinus Walleij /* Get ADC channels */ 10310a8686e3SLinus Walleij di->btemp_ball = devm_iio_channel_get(&pdev->dev, "btemp_ball"); 10320a8686e3SLinus Walleij if (IS_ERR(di->btemp_ball)) { 10330a8686e3SLinus Walleij if (PTR_ERR(di->btemp_ball) == -ENODEV) 10340a8686e3SLinus Walleij return -EPROBE_DEFER; 10350a8686e3SLinus Walleij dev_err(&pdev->dev, "failed to get BTEMP BALL ADC channel\n"); 10360a8686e3SLinus Walleij return PTR_ERR(di->btemp_ball); 10370a8686e3SLinus Walleij } 10380a8686e3SLinus Walleij di->bat_ctrl = devm_iio_channel_get(&pdev->dev, "bat_ctrl"); 10390a8686e3SLinus Walleij if (IS_ERR(di->bat_ctrl)) { 10400a8686e3SLinus Walleij if (PTR_ERR(di->bat_ctrl) == -ENODEV) 10410a8686e3SLinus Walleij return -EPROBE_DEFER; 10420a8686e3SLinus Walleij dev_err(&pdev->dev, "failed to get BAT CTRL ADC channel\n"); 10430a8686e3SLinus Walleij return PTR_ERR(di->bat_ctrl); 10440a8686e3SLinus Walleij } 10458c0984e5SSebastian Reichel 10468c0984e5SSebastian Reichel di->initialized = false; 10478c0984e5SSebastian Reichel 10488c0984e5SSebastian Reichel psy_cfg.supplied_to = supply_interface; 10498c0984e5SSebastian Reichel psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 10508c0984e5SSebastian Reichel psy_cfg.drv_data = di; 10518c0984e5SSebastian Reichel 10528c0984e5SSebastian Reichel /* Create a work queue for the btemp */ 10538c0984e5SSebastian Reichel di->btemp_wq = 1054a8dd5b68SBhaktipriya Shridhar alloc_workqueue("ab8500_btemp_wq", WQ_MEM_RECLAIM, 0); 10558c0984e5SSebastian Reichel if (di->btemp_wq == NULL) { 10568c0984e5SSebastian Reichel dev_err(di->dev, "failed to create work queue\n"); 10578c0984e5SSebastian Reichel return -ENOMEM; 10588c0984e5SSebastian Reichel } 10598c0984e5SSebastian Reichel 10608c0984e5SSebastian Reichel /* Init work for measuring temperature periodically */ 10618c0984e5SSebastian Reichel INIT_DEFERRABLE_WORK(&di->btemp_periodic_work, 10628c0984e5SSebastian Reichel ab8500_btemp_periodic_work); 10638c0984e5SSebastian Reichel 10648c0984e5SSebastian Reichel /* Set BTEMP thermal limits. Low and Med are fixed */ 10658c0984e5SSebastian Reichel di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT; 10668c0984e5SSebastian Reichel di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT; 10678c0984e5SSebastian Reichel 10688c0984e5SSebastian Reichel ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 10698c0984e5SSebastian Reichel AB8500_BTEMP_HIGH_TH, &val); 10708c0984e5SSebastian Reichel if (ret < 0) { 10718c0984e5SSebastian Reichel dev_err(di->dev, "%s ab8500 read failed\n", __func__); 10728c0984e5SSebastian Reichel goto free_btemp_wq; 10738c0984e5SSebastian Reichel } 10748c0984e5SSebastian Reichel switch (val) { 10758c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_0: 10768c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_1: 10778c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 10788c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_57; 10798c0984e5SSebastian Reichel break; 10808c0984e5SSebastian Reichel case BTEMP_HIGH_TH_52: 10818c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 10828c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_52; 10838c0984e5SSebastian Reichel break; 10848c0984e5SSebastian Reichel case BTEMP_HIGH_TH_62: 10858c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit = 10868c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_62; 10878c0984e5SSebastian Reichel break; 10888c0984e5SSebastian Reichel } 10898c0984e5SSebastian Reichel 10908c0984e5SSebastian Reichel /* Register BTEMP power supply class */ 10918c0984e5SSebastian Reichel di->btemp_psy = power_supply_register(di->dev, &ab8500_btemp_desc, 10928c0984e5SSebastian Reichel &psy_cfg); 10938c0984e5SSebastian Reichel if (IS_ERR(di->btemp_psy)) { 10948c0984e5SSebastian Reichel dev_err(di->dev, "failed to register BTEMP psy\n"); 10958c0984e5SSebastian Reichel ret = PTR_ERR(di->btemp_psy); 10968c0984e5SSebastian Reichel goto free_btemp_wq; 10978c0984e5SSebastian Reichel } 10988c0984e5SSebastian Reichel 10998c0984e5SSebastian Reichel /* Register interrupts */ 11008c0984e5SSebastian Reichel for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) { 11018c0984e5SSebastian Reichel irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); 1102b10e9700SKrzysztof Kozlowski if (irq < 0) { 1103b10e9700SKrzysztof Kozlowski ret = irq; 1104b10e9700SKrzysztof Kozlowski goto free_irq; 1105b10e9700SKrzysztof Kozlowski } 1106b10e9700SKrzysztof Kozlowski 11078c0984e5SSebastian Reichel ret = request_threaded_irq(irq, NULL, ab8500_btemp_irq[i].isr, 1108*df12470cSTian Tao IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, 11098c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, di); 11108c0984e5SSebastian Reichel 11118c0984e5SSebastian Reichel if (ret) { 11128c0984e5SSebastian Reichel dev_err(di->dev, "failed to request %s IRQ %d: %d\n" 11138c0984e5SSebastian Reichel , ab8500_btemp_irq[i].name, irq, ret); 11148c0984e5SSebastian Reichel goto free_irq; 11158c0984e5SSebastian Reichel } 11168c0984e5SSebastian Reichel dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", 11178c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, irq, ret); 11188c0984e5SSebastian Reichel } 11198c0984e5SSebastian Reichel 11208c0984e5SSebastian Reichel platform_set_drvdata(pdev, di); 11218c0984e5SSebastian Reichel 11228c0984e5SSebastian Reichel /* Kick off periodic temperature measurements */ 11238c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true); 11248c0984e5SSebastian Reichel list_add_tail(&di->node, &ab8500_btemp_list); 11258c0984e5SSebastian Reichel 11268c0984e5SSebastian Reichel return ret; 11278c0984e5SSebastian Reichel 11288c0984e5SSebastian Reichel free_irq: 11298c0984e5SSebastian Reichel /* We also have to free all successfully registered irqs */ 11308c0984e5SSebastian Reichel for (i = i - 1; i >= 0; i--) { 11318c0984e5SSebastian Reichel irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name); 11328c0984e5SSebastian Reichel free_irq(irq, di); 11338c0984e5SSebastian Reichel } 1134ccc023a5SKrzysztof Kozlowski 1135ccc023a5SKrzysztof Kozlowski power_supply_unregister(di->btemp_psy); 11368c0984e5SSebastian Reichel free_btemp_wq: 11378c0984e5SSebastian Reichel destroy_workqueue(di->btemp_wq); 11388c0984e5SSebastian Reichel return ret; 11398c0984e5SSebastian Reichel } 11408c0984e5SSebastian Reichel 11418c0984e5SSebastian Reichel static const struct of_device_id ab8500_btemp_match[] = { 11428c0984e5SSebastian Reichel { .compatible = "stericsson,ab8500-btemp", }, 11438c0984e5SSebastian Reichel { }, 11448c0984e5SSebastian Reichel }; 11458c0984e5SSebastian Reichel 11468c0984e5SSebastian Reichel static struct platform_driver ab8500_btemp_driver = { 11478c0984e5SSebastian Reichel .probe = ab8500_btemp_probe, 11488c0984e5SSebastian Reichel .remove = ab8500_btemp_remove, 11498c0984e5SSebastian Reichel .suspend = ab8500_btemp_suspend, 11508c0984e5SSebastian Reichel .resume = ab8500_btemp_resume, 11518c0984e5SSebastian Reichel .driver = { 11528c0984e5SSebastian Reichel .name = "ab8500-btemp", 11538c0984e5SSebastian Reichel .of_match_table = ab8500_btemp_match, 11548c0984e5SSebastian Reichel }, 11558c0984e5SSebastian Reichel }; 11568c0984e5SSebastian Reichel 11578c0984e5SSebastian Reichel static int __init ab8500_btemp_init(void) 11588c0984e5SSebastian Reichel { 11598c0984e5SSebastian Reichel return platform_driver_register(&ab8500_btemp_driver); 11608c0984e5SSebastian Reichel } 11618c0984e5SSebastian Reichel 11628c0984e5SSebastian Reichel static void __exit ab8500_btemp_exit(void) 11638c0984e5SSebastian Reichel { 11648c0984e5SSebastian Reichel platform_driver_unregister(&ab8500_btemp_driver); 11658c0984e5SSebastian Reichel } 11668c0984e5SSebastian Reichel 11678c0984e5SSebastian Reichel device_initcall(ab8500_btemp_init); 11688c0984e5SSebastian Reichel module_exit(ab8500_btemp_exit); 11698c0984e5SSebastian Reichel 11708c0984e5SSebastian Reichel MODULE_LICENSE("GPL v2"); 11718c0984e5SSebastian Reichel MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); 11728c0984e5SSebastian Reichel MODULE_ALIAS("platform:ab8500-btemp"); 11738c0984e5SSebastian Reichel MODULE_DESCRIPTION("AB8500 battery temperature driver"); 1174