![Linus Torvalds](/assets/img/avatar_default.png)
- Marvell 88pm860x charger and battery drivers; - Texas Instruments LP8788 charger driver; 2. Two new power supply properties: whether a battery is authentic, and chargers' maximal currents and voltages; 3. A lot of TI LP8727 Charger cleanups; 4. New features for Charger Manager, mainly now we can disable specific regulators; 5. Random fixes and cleanups for other drivers. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iQIcBAABAgAGBQJQbjMFAAoJEGgI9fZJve1bR6gP/2Ri0etCU5zQMmbsFv5wxwHT BNgqFYoLmtxAJm7afM/9Qo2GxSam/Gi6vW6jfYxVOEDt9hJ5zaaJBxM4XmKEBShR PYlV9u45jGUCIHJXoi8DTND9Swz0VfVve9UtK5fVdXr73fYFemP8U86alI1MBL5Q 8U3F0V8rObjGKWZrzN4BreB8bfbZYQCUafpoGS1ids3Uwm38d4tDb/jx8guSV24D LEhXy9unV9NdPExRn1FWFAgqjtgnnBv5SmpCBd6VwKNmpOgVB+H0CjOaOPzMgd+0 X6dpJQtbjGZOhHhkcAoWsXYgxS8WMtTqlSjHSgswJJ/fdjv8YJoT7ncyu5wItY1x cN5NRBKVpnHv+fkQDE4xVWzEOH68lK8RoGksay0gvTJj3MQWwOpOANGHbsnMG6rj GBzQ7pyMbDTK7n1oynvmSskF4BdvYHM+Ns7vPUOAzoduKrOnhPVDpk3rLSFZxQNO RoqXbnNYqg4qROB9z8Drs95WD59fKjNTlfFr1moR2sr4wncEJiFduMz4dCOs7nq7 ahZxd95a2Bb6LbcN244+loGBXmx6KD6BurrDc3yTM3hl+oVx+MecVv9uoKvKlz4y YPh9XrdCSfj9Ms7TOqW8XPDl/ZREswaCIer7x8XsL+K42fYkPKlrO3OUMHIbh+3e rfkFPAR55bLcmtiaahp3 =LkdH -----END PGP SIGNATURE----- Merge tag 'for-v3.7' of git://git.infradead.org/battery-2.6 Pull battery updates from Anton Vorontsov: "1. New drivers: - Marvell 88pm860x charger and battery drivers; - Texas Instruments LP8788 charger driver; 2. Two new power supply properties: whether a battery is authentic, and chargers' maximal currents and voltages; 3. A lot of TI LP8727 Charger cleanups; 4. New features for Charger Manager, mainly now we can disable specific regulators; 5. Random fixes and cleanups for other drivers." Fix up trivial conflicts in <linux/mfd/88pm860x.h> * tag 'for-v3.7' of git://git.infradead.org/battery-2.6: (52 commits) pda_power: Remove ac_draw_failed goto and label charger-manager: Add support sysfs entry for charger charger-manager: Support limit of maximum possible charger-manager: Check fully charged state of battery periodically lp8727_charger: More pure cosmetic improvements lp8727_charger: Fix checkpatch warning lp8727_charger: Add description in the private data lp8727_charger: Fix a typo - chg_parm to chg_param lp8727_charger: Make some cosmetic changes in lp8727_delayed_func() lp8727_charger: Clean up lp8727_charger_changed() lp8727_charger: Return if the battery is discharging lp8727_charger: Make lp8727_charger_get_propery() simpler lp8727_charger: Make lp8727_ctrl_switch() inline lp8727_charger: Make lp8727_init_device() shorter lp8727_charger: Clean up lp8727_is_charger_attached() lp8727_charger: Use specific definition lp8727_charger: Clean up lp8727 definitions lp8727_charger: Use the definition rather than enum lp8727_charger: Fix code for getting battery temp lp8727_charger: Clear interrrupts at inital time ...
1130 lines
29 KiB
C
1130 lines
29 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2012
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*
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* Battery temperature driver for AB8500
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*
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* License Terms: GNU General Public License v2
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* Author:
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* Johan Palsson <johan.palsson@stericsson.com>
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* Karl Komierowski <karl.komierowski@stericsson.com>
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* Arun R Murthy <arun.murthy@stericsson.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/completion.h>
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#include <linux/workqueue.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/mfd/abx500.h>
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#include <linux/mfd/abx500/ab8500-bm.h>
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#include <linux/mfd/abx500/ab8500-gpadc.h>
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#include <linux/jiffies.h>
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#define VTVOUT_V 1800
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#define BTEMP_THERMAL_LOW_LIMIT -10
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#define BTEMP_THERMAL_MED_LIMIT 0
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#define BTEMP_THERMAL_HIGH_LIMIT_52 52
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#define BTEMP_THERMAL_HIGH_LIMIT_57 57
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#define BTEMP_THERMAL_HIGH_LIMIT_62 62
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#define BTEMP_BATCTRL_CURR_SRC_7UA 7
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#define BTEMP_BATCTRL_CURR_SRC_20UA 20
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#define to_ab8500_btemp_device_info(x) container_of((x), \
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struct ab8500_btemp, btemp_psy);
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/**
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* struct ab8500_btemp_interrupts - ab8500 interrupts
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* @name: name of the interrupt
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* @isr function pointer to the isr
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*/
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struct ab8500_btemp_interrupts {
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char *name;
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irqreturn_t (*isr)(int irq, void *data);
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};
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struct ab8500_btemp_events {
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bool batt_rem;
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bool btemp_high;
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bool btemp_medhigh;
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bool btemp_lowmed;
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bool btemp_low;
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bool ac_conn;
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bool usb_conn;
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};
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struct ab8500_btemp_ranges {
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int btemp_high_limit;
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int btemp_med_limit;
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int btemp_low_limit;
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};
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/**
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* struct ab8500_btemp - ab8500 BTEMP device information
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* @dev: Pointer to the structure device
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* @node: List of AB8500 BTEMPs, hence prepared for reentrance
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* @curr_source: What current source we use, in uA
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* @bat_temp: Battery temperature in degree Celcius
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* @prev_bat_temp Last dispatched battery temperature
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* @parent: Pointer to the struct ab8500
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* @gpadc: Pointer to the struct gpadc
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* @fg: Pointer to the struct fg
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* @pdata: Pointer to the abx500_btemp platform data
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* @bat: Pointer to the abx500_bm platform data
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* @btemp_psy: Structure for BTEMP specific battery properties
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* @events: Structure for information about events triggered
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* @btemp_ranges: Battery temperature range structure
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* @btemp_wq: Work queue for measuring the temperature periodically
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* @btemp_periodic_work: Work for measuring the temperature periodically
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*/
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struct ab8500_btemp {
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struct device *dev;
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struct list_head node;
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int curr_source;
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int bat_temp;
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int prev_bat_temp;
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struct ab8500 *parent;
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struct ab8500_gpadc *gpadc;
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struct ab8500_fg *fg;
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struct abx500_btemp_platform_data *pdata;
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struct abx500_bm_data *bat;
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struct power_supply btemp_psy;
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struct ab8500_btemp_events events;
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struct ab8500_btemp_ranges btemp_ranges;
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struct workqueue_struct *btemp_wq;
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struct delayed_work btemp_periodic_work;
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};
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/* BTEMP power supply properties */
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static enum power_supply_property ab8500_btemp_props[] = {
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_TECHNOLOGY,
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POWER_SUPPLY_PROP_TEMP,
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};
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static LIST_HEAD(ab8500_btemp_list);
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/**
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* ab8500_btemp_get() - returns a reference to the primary AB8500 BTEMP
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* (i.e. the first BTEMP in the instance list)
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*/
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struct ab8500_btemp *ab8500_btemp_get(void)
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{
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struct ab8500_btemp *btemp;
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btemp = list_first_entry(&ab8500_btemp_list, struct ab8500_btemp, node);
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return btemp;
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}
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/**
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* ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance
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* @di: pointer to the ab8500_btemp structure
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* @v_batctrl: measured batctrl voltage
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* @inst_curr: measured instant current
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*
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* This function returns the battery resistance that is
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* derived from the BATCTRL voltage.
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* Returns value in Ohms.
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*/
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static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di,
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int v_batctrl, int inst_curr)
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{
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int rbs;
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if (is_ab8500_1p1_or_earlier(di->parent)) {
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/*
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* For ABB cut1.0 and 1.1 BAT_CTRL is internally
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* connected to 1.8V through a 450k resistor
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*/
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return (450000 * (v_batctrl)) / (1800 - v_batctrl);
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}
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if (di->bat->adc_therm == ABx500_ADC_THERM_BATCTRL) {
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/*
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* If the battery has internal NTC, we use the current
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* source to calculate the resistance, 7uA or 20uA
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*/
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rbs = (v_batctrl * 1000
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- di->bat->gnd_lift_resistance * inst_curr)
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/ di->curr_source;
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} else {
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/*
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* BAT_CTRL is internally
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* connected to 1.8V through a 80k resistor
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*/
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rbs = (80000 * (v_batctrl)) / (1800 - v_batctrl);
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}
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return rbs;
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}
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/**
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* ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage
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* @di: pointer to the ab8500_btemp structure
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*
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* This function returns the voltage on BATCTRL. Returns value in mV.
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*/
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static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di)
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{
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int vbtemp;
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static int prev;
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vbtemp = ab8500_gpadc_convert(di->gpadc, BAT_CTRL);
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if (vbtemp < 0) {
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dev_err(di->dev,
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"%s gpadc conversion failed, using previous value",
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__func__);
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return prev;
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}
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prev = vbtemp;
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return vbtemp;
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}
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/**
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* ab8500_btemp_curr_source_enable() - enable/disable batctrl current source
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* @di: pointer to the ab8500_btemp structure
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* @enable: enable or disable the current source
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*
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* Enable or disable the current sources for the BatCtrl AD channel
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*/
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static int ab8500_btemp_curr_source_enable(struct ab8500_btemp *di,
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bool enable)
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{
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int curr;
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int ret = 0;
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/*
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* BATCTRL current sources are included on AB8500 cut2.0
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* and future versions
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*/
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if (is_ab8500_1p1_or_earlier(di->parent))
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return 0;
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/* Only do this for batteries with internal NTC */
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if (di->bat->adc_therm == ABx500_ADC_THERM_BATCTRL && enable) {
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if (di->curr_source == BTEMP_BATCTRL_CURR_SRC_7UA)
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curr = BAT_CTRL_7U_ENA;
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else
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curr = BAT_CTRL_20U_ENA;
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dev_dbg(di->dev, "Set BATCTRL %duA\n", di->curr_source);
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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FORCE_BAT_CTRL_CMP_HIGH, FORCE_BAT_CTRL_CMP_HIGH);
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if (ret) {
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dev_err(di->dev, "%s failed setting cmp_force\n",
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__func__);
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return ret;
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}
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/*
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* We have to wait one 32kHz cycle before enabling
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* the current source, since ForceBatCtrlCmpHigh needs
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* to be written in a separate cycle
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*/
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udelay(32);
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ret = abx500_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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FORCE_BAT_CTRL_CMP_HIGH | curr);
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if (ret) {
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dev_err(di->dev, "%s failed enabling current source\n",
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__func__);
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goto disable_curr_source;
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}
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} else if (di->bat->adc_therm == ABx500_ADC_THERM_BATCTRL && !enable) {
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dev_dbg(di->dev, "Disable BATCTRL curr source\n");
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/* Write 0 to the curr bits */
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA,
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~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA));
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if (ret) {
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dev_err(di->dev, "%s failed disabling current source\n",
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__func__);
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goto disable_curr_source;
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}
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/* Enable Pull-Up and comparator */
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA,
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BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA);
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if (ret) {
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dev_err(di->dev, "%s failed enabling PU and comp\n",
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__func__);
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goto enable_pu_comp;
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}
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/*
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* We have to wait one 32kHz cycle before disabling
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* ForceBatCtrlCmpHigh since this needs to be written
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* in a separate cycle
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*/
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udelay(32);
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/* Disable 'force comparator' */
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH);
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if (ret) {
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dev_err(di->dev, "%s failed disabling force comp\n",
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__func__);
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goto disable_force_comp;
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}
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}
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return ret;
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/*
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* We have to try unsetting FORCE_BAT_CTRL_CMP_HIGH one more time
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* if we got an error above
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*/
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disable_curr_source:
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/* Write 0 to the curr bits */
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA,
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~(BAT_CTRL_7U_ENA | BAT_CTRL_20U_ENA));
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if (ret) {
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dev_err(di->dev, "%s failed disabling current source\n",
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__func__);
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return ret;
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}
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enable_pu_comp:
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/* Enable Pull-Up and comparator */
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA,
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BAT_CTRL_PULL_UP_ENA | BAT_CTRL_CMP_ENA);
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if (ret) {
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dev_err(di->dev, "%s failed enabling PU and comp\n",
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__func__);
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return ret;
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}
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disable_force_comp:
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/*
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* We have to wait one 32kHz cycle before disabling
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* ForceBatCtrlCmpHigh since this needs to be written
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* in a separate cycle
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*/
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udelay(32);
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/* Disable 'force comparator' */
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ret = abx500_mask_and_set_register_interruptible(di->dev,
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AB8500_CHARGER, AB8500_BAT_CTRL_CURRENT_SOURCE,
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FORCE_BAT_CTRL_CMP_HIGH, ~FORCE_BAT_CTRL_CMP_HIGH);
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if (ret) {
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dev_err(di->dev, "%s failed disabling force comp\n",
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__func__);
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return ret;
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}
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return ret;
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}
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/**
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* ab8500_btemp_get_batctrl_res() - get battery resistance
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* @di: pointer to the ab8500_btemp structure
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*
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* This function returns the battery pack identification resistance.
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* Returns value in Ohms.
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*/
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static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di)
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{
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int ret;
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int batctrl = 0;
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int res;
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int inst_curr;
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int i;
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/*
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* BATCTRL current sources are included on AB8500 cut2.0
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* and future versions
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*/
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ret = ab8500_btemp_curr_source_enable(di, true);
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if (ret) {
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dev_err(di->dev, "%s curr source enabled failed\n", __func__);
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return ret;
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}
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if (!di->fg)
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di->fg = ab8500_fg_get();
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if (!di->fg) {
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dev_err(di->dev, "No fg found\n");
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return -EINVAL;
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}
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ret = ab8500_fg_inst_curr_start(di->fg);
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if (ret) {
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dev_err(di->dev, "Failed to start current measurement\n");
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return ret;
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}
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/*
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* Since there is no interrupt when current measurement is done,
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* loop for over 250ms (250ms is one sample conversion time
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* with 32.768 Khz RTC clock). Note that a stop time must be set
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* since the ab8500_btemp_read_batctrl_voltage call can block and
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* take an unknown amount of time to complete.
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*/
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i = 0;
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do {
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batctrl += ab8500_btemp_read_batctrl_voltage(di);
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i++;
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msleep(20);
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} while (!ab8500_fg_inst_curr_done(di->fg));
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batctrl /= i;
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ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr);
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if (ret) {
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dev_err(di->dev, "Failed to finalize current measurement\n");
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return ret;
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}
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res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr);
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ret = ab8500_btemp_curr_source_enable(di, false);
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if (ret) {
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dev_err(di->dev, "%s curr source disable failed\n", __func__);
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return ret;
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}
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dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n",
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__func__, batctrl, res, inst_curr, i);
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return res;
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}
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/**
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* ab8500_btemp_res_to_temp() - resistance to temperature
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* @di: pointer to the ab8500_btemp structure
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* @tbl: pointer to the resiatance to temperature table
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* @tbl_size: size of the resistance to temperature table
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* @res: resistance to calculate the temperature from
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*
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* This function returns the battery temperature in degrees Celcius
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* based on the NTC resistance.
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*/
|
|
static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di,
|
|
const struct abx500_res_to_temp *tbl, int tbl_size, int res)
|
|
{
|
|
int i, temp;
|
|
/*
|
|
* Calculate the formula for the straight line
|
|
* Simple interpolation if we are within
|
|
* the resistance table limits, extrapolate
|
|
* if resistance is outside the limits.
|
|
*/
|
|
if (res > tbl[0].resist)
|
|
i = 0;
|
|
else if (res <= tbl[tbl_size - 1].resist)
|
|
i = tbl_size - 2;
|
|
else {
|
|
i = 0;
|
|
while (!(res <= tbl[i].resist &&
|
|
res > tbl[i + 1].resist))
|
|
i++;
|
|
}
|
|
|
|
temp = tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) *
|
|
(res - tbl[i].resist)) / (tbl[i + 1].resist - tbl[i].resist);
|
|
return temp;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_measure_temp() - measure battery temperature
|
|
* @di: pointer to the ab8500_btemp structure
|
|
*
|
|
* Returns battery temperature (on success) else the previous temperature
|
|
*/
|
|
static int ab8500_btemp_measure_temp(struct ab8500_btemp *di)
|
|
{
|
|
int temp;
|
|
static int prev;
|
|
int rbat, rntc, vntc;
|
|
u8 id;
|
|
|
|
id = di->bat->batt_id;
|
|
|
|
if (di->bat->adc_therm == ABx500_ADC_THERM_BATCTRL &&
|
|
id != BATTERY_UNKNOWN) {
|
|
|
|
rbat = ab8500_btemp_get_batctrl_res(di);
|
|
if (rbat < 0) {
|
|
dev_err(di->dev, "%s get batctrl res failed\n",
|
|
__func__);
|
|
/*
|
|
* Return out-of-range temperature so that
|
|
* charging is stopped
|
|
*/
|
|
return BTEMP_THERMAL_LOW_LIMIT;
|
|
}
|
|
|
|
temp = ab8500_btemp_res_to_temp(di,
|
|
di->bat->bat_type[id].r_to_t_tbl,
|
|
di->bat->bat_type[id].n_temp_tbl_elements, rbat);
|
|
} else {
|
|
vntc = ab8500_gpadc_convert(di->gpadc, BTEMP_BALL);
|
|
if (vntc < 0) {
|
|
dev_err(di->dev,
|
|
"%s gpadc conversion failed,"
|
|
" using previous value\n", __func__);
|
|
return prev;
|
|
}
|
|
/*
|
|
* The PCB NTC is sourced from VTVOUT via a 230kOhm
|
|
* resistor.
|
|
*/
|
|
rntc = 230000 * vntc / (VTVOUT_V - vntc);
|
|
|
|
temp = ab8500_btemp_res_to_temp(di,
|
|
di->bat->bat_type[id].r_to_t_tbl,
|
|
di->bat->bat_type[id].n_temp_tbl_elements, rntc);
|
|
prev = temp;
|
|
}
|
|
dev_dbg(di->dev, "Battery temperature is %d\n", temp);
|
|
return temp;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_id() - Identify the connected battery
|
|
* @di: pointer to the ab8500_btemp structure
|
|
*
|
|
* This function will try to identify the battery by reading the ID
|
|
* resistor. Some brands use a combined ID resistor with a NTC resistor to
|
|
* both be able to identify and to read the temperature of it.
|
|
*/
|
|
static int ab8500_btemp_id(struct ab8500_btemp *di)
|
|
{
|
|
int res;
|
|
u8 i;
|
|
|
|
di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA;
|
|
di->bat->batt_id = BATTERY_UNKNOWN;
|
|
|
|
res = ab8500_btemp_get_batctrl_res(di);
|
|
if (res < 0) {
|
|
dev_err(di->dev, "%s get batctrl res failed\n", __func__);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* BATTERY_UNKNOWN is defined on position 0, skip it! */
|
|
for (i = BATTERY_UNKNOWN + 1; i < di->bat->n_btypes; i++) {
|
|
if ((res <= di->bat->bat_type[i].resis_high) &&
|
|
(res >= di->bat->bat_type[i].resis_low)) {
|
|
dev_dbg(di->dev, "Battery detected on %s"
|
|
" low %d < res %d < high: %d"
|
|
" index: %d\n",
|
|
di->bat->adc_therm == ABx500_ADC_THERM_BATCTRL ?
|
|
"BATCTRL" : "BATTEMP",
|
|
di->bat->bat_type[i].resis_low, res,
|
|
di->bat->bat_type[i].resis_high, i);
|
|
|
|
di->bat->batt_id = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (di->bat->batt_id == BATTERY_UNKNOWN) {
|
|
dev_warn(di->dev, "Battery identified as unknown"
|
|
", resistance %d Ohm\n", res);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/*
|
|
* We only have to change current source if the
|
|
* detected type is Type 1, else we use the 7uA source
|
|
*/
|
|
if (di->bat->adc_therm == ABx500_ADC_THERM_BATCTRL &&
|
|
di->bat->batt_id == 1) {
|
|
dev_dbg(di->dev, "Set BATCTRL current source to 20uA\n");
|
|
di->curr_source = BTEMP_BATCTRL_CURR_SRC_20UA;
|
|
}
|
|
|
|
return di->bat->batt_id;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_periodic_work() - Measuring the temperature periodically
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* Work function for measuring the temperature periodically
|
|
*/
|
|
static void ab8500_btemp_periodic_work(struct work_struct *work)
|
|
{
|
|
int interval;
|
|
struct ab8500_btemp *di = container_of(work,
|
|
struct ab8500_btemp, btemp_periodic_work.work);
|
|
|
|
di->bat_temp = ab8500_btemp_measure_temp(di);
|
|
|
|
if (di->bat_temp != di->prev_bat_temp) {
|
|
di->prev_bat_temp = di->bat_temp;
|
|
power_supply_changed(&di->btemp_psy);
|
|
}
|
|
|
|
if (di->events.ac_conn || di->events.usb_conn)
|
|
interval = di->bat->temp_interval_chg;
|
|
else
|
|
interval = di->bat->temp_interval_nochg;
|
|
|
|
/* Schedule a new measurement */
|
|
queue_delayed_work(di->btemp_wq,
|
|
&di->btemp_periodic_work,
|
|
round_jiffies(interval * HZ));
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_batctrlindb_handler() - battery removal detected
|
|
* @irq: interrupt number
|
|
* @_di: void pointer that has to address of ab8500_btemp
|
|
*
|
|
* Returns IRQ status(IRQ_HANDLED)
|
|
*/
|
|
static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di)
|
|
{
|
|
struct ab8500_btemp *di = _di;
|
|
dev_err(di->dev, "Battery removal detected!\n");
|
|
|
|
di->events.batt_rem = true;
|
|
power_supply_changed(&di->btemp_psy);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_templow_handler() - battery temp lower than 10 degrees
|
|
* @irq: interrupt number
|
|
* @_di: void pointer that has to address of ab8500_btemp
|
|
*
|
|
* Returns IRQ status(IRQ_HANDLED)
|
|
*/
|
|
static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di)
|
|
{
|
|
struct ab8500_btemp *di = _di;
|
|
|
|
if (is_ab8500_2p0_or_earlier(di->parent)) {
|
|
dev_dbg(di->dev, "Ignore false btemp low irq"
|
|
" for ABB cut 1.0, 1.1 and 2.0\n");
|
|
} else {
|
|
dev_crit(di->dev, "Battery temperature lower than -10deg c\n");
|
|
|
|
di->events.btemp_low = true;
|
|
di->events.btemp_high = false;
|
|
di->events.btemp_medhigh = false;
|
|
di->events.btemp_lowmed = false;
|
|
power_supply_changed(&di->btemp_psy);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_temphigh_handler() - battery temp higher than max temp
|
|
* @irq: interrupt number
|
|
* @_di: void pointer that has to address of ab8500_btemp
|
|
*
|
|
* Returns IRQ status(IRQ_HANDLED)
|
|
*/
|
|
static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di)
|
|
{
|
|
struct ab8500_btemp *di = _di;
|
|
|
|
dev_crit(di->dev, "Battery temperature is higher than MAX temp\n");
|
|
|
|
di->events.btemp_high = true;
|
|
di->events.btemp_medhigh = false;
|
|
di->events.btemp_lowmed = false;
|
|
di->events.btemp_low = false;
|
|
power_supply_changed(&di->btemp_psy);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_lowmed_handler() - battery temp between low and medium
|
|
* @irq: interrupt number
|
|
* @_di: void pointer that has to address of ab8500_btemp
|
|
*
|
|
* Returns IRQ status(IRQ_HANDLED)
|
|
*/
|
|
static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di)
|
|
{
|
|
struct ab8500_btemp *di = _di;
|
|
|
|
dev_dbg(di->dev, "Battery temperature is between low and medium\n");
|
|
|
|
di->events.btemp_lowmed = true;
|
|
di->events.btemp_medhigh = false;
|
|
di->events.btemp_high = false;
|
|
di->events.btemp_low = false;
|
|
power_supply_changed(&di->btemp_psy);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_medhigh_handler() - battery temp between medium and high
|
|
* @irq: interrupt number
|
|
* @_di: void pointer that has to address of ab8500_btemp
|
|
*
|
|
* Returns IRQ status(IRQ_HANDLED)
|
|
*/
|
|
static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di)
|
|
{
|
|
struct ab8500_btemp *di = _di;
|
|
|
|
dev_dbg(di->dev, "Battery temperature is between medium and high\n");
|
|
|
|
di->events.btemp_medhigh = true;
|
|
di->events.btemp_lowmed = false;
|
|
di->events.btemp_high = false;
|
|
di->events.btemp_low = false;
|
|
power_supply_changed(&di->btemp_psy);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_periodic() - Periodic temperature measurements
|
|
* @di: pointer to the ab8500_btemp structure
|
|
* @enable: enable or disable periodic temperature measurements
|
|
*
|
|
* Starts of stops periodic temperature measurements. Periodic measurements
|
|
* should only be done when a charger is connected.
|
|
*/
|
|
static void ab8500_btemp_periodic(struct ab8500_btemp *di,
|
|
bool enable)
|
|
{
|
|
dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n",
|
|
enable);
|
|
/*
|
|
* Make sure a new measurement is done directly by cancelling
|
|
* any pending work
|
|
*/
|
|
cancel_delayed_work_sync(&di->btemp_periodic_work);
|
|
|
|
if (enable)
|
|
queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0);
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_get_temp() - get battery temperature
|
|
* @di: pointer to the ab8500_btemp structure
|
|
*
|
|
* Returns battery temperature
|
|
*/
|
|
static int ab8500_btemp_get_temp(struct ab8500_btemp *di)
|
|
{
|
|
int temp = 0;
|
|
|
|
/*
|
|
* The BTEMP events are not reliabe on AB8500 cut2.0
|
|
* and prior versions
|
|
*/
|
|
if (is_ab8500_2p0_or_earlier(di->parent)) {
|
|
temp = di->bat_temp * 10;
|
|
} else {
|
|
if (di->events.btemp_low) {
|
|
if (temp > di->btemp_ranges.btemp_low_limit)
|
|
temp = di->btemp_ranges.btemp_low_limit;
|
|
else
|
|
temp = di->bat_temp * 10;
|
|
} else if (di->events.btemp_high) {
|
|
if (temp < di->btemp_ranges.btemp_high_limit)
|
|
temp = di->btemp_ranges.btemp_high_limit;
|
|
else
|
|
temp = di->bat_temp * 10;
|
|
} else if (di->events.btemp_lowmed) {
|
|
if (temp > di->btemp_ranges.btemp_med_limit)
|
|
temp = di->btemp_ranges.btemp_med_limit;
|
|
else
|
|
temp = di->bat_temp * 10;
|
|
} else if (di->events.btemp_medhigh) {
|
|
if (temp < di->btemp_ranges.btemp_med_limit)
|
|
temp = di->btemp_ranges.btemp_med_limit;
|
|
else
|
|
temp = di->bat_temp * 10;
|
|
} else
|
|
temp = di->bat_temp * 10;
|
|
}
|
|
return temp;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_get_batctrl_temp() - get the temperature
|
|
* @btemp: pointer to the btemp structure
|
|
*
|
|
* Returns the batctrl temperature in millidegrees
|
|
*/
|
|
int ab8500_btemp_get_batctrl_temp(struct ab8500_btemp *btemp)
|
|
{
|
|
return btemp->bat_temp * 1000;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_get_property() - get the btemp properties
|
|
* @psy: pointer to the power_supply structure
|
|
* @psp: pointer to the power_supply_property structure
|
|
* @val: pointer to the power_supply_propval union
|
|
*
|
|
* This function gets called when an application tries to get the btemp
|
|
* properties by reading the sysfs files.
|
|
* online: presence of the battery
|
|
* present: presence of the battery
|
|
* technology: battery technology
|
|
* temp: battery temperature
|
|
* Returns error code in case of failure else 0(on success)
|
|
*/
|
|
static int ab8500_btemp_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct ab8500_btemp *di;
|
|
|
|
di = to_ab8500_btemp_device_info(psy);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
if (di->events.batt_rem)
|
|
val->intval = 0;
|
|
else
|
|
val->intval = 1;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
|
val->intval = di->bat->bat_type[di->bat->batt_id].name;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
val->intval = ab8500_btemp_get_temp(di);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data)
|
|
{
|
|
struct power_supply *psy;
|
|
struct power_supply *ext;
|
|
struct ab8500_btemp *di;
|
|
union power_supply_propval ret;
|
|
int i, j;
|
|
bool psy_found = false;
|
|
|
|
psy = (struct power_supply *)data;
|
|
ext = dev_get_drvdata(dev);
|
|
di = to_ab8500_btemp_device_info(psy);
|
|
|
|
/*
|
|
* For all psy where the name of your driver
|
|
* appears in any supplied_to
|
|
*/
|
|
for (i = 0; i < ext->num_supplicants; i++) {
|
|
if (!strcmp(ext->supplied_to[i], psy->name))
|
|
psy_found = true;
|
|
}
|
|
|
|
if (!psy_found)
|
|
return 0;
|
|
|
|
/* Go through all properties for the psy */
|
|
for (j = 0; j < ext->num_properties; j++) {
|
|
enum power_supply_property prop;
|
|
prop = ext->properties[j];
|
|
|
|
if (ext->get_property(ext, prop, &ret))
|
|
continue;
|
|
|
|
switch (prop) {
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
switch (ext->type) {
|
|
case POWER_SUPPLY_TYPE_MAINS:
|
|
/* AC disconnected */
|
|
if (!ret.intval && di->events.ac_conn) {
|
|
di->events.ac_conn = false;
|
|
}
|
|
/* AC connected */
|
|
else if (ret.intval && !di->events.ac_conn) {
|
|
di->events.ac_conn = true;
|
|
if (!di->events.usb_conn)
|
|
ab8500_btemp_periodic(di, true);
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_TYPE_USB:
|
|
/* USB disconnected */
|
|
if (!ret.intval && di->events.usb_conn) {
|
|
di->events.usb_conn = false;
|
|
}
|
|
/* USB connected */
|
|
else if (ret.intval && !di->events.usb_conn) {
|
|
di->events.usb_conn = true;
|
|
if (!di->events.ac_conn)
|
|
ab8500_btemp_periodic(di, true);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ab8500_btemp_external_power_changed() - callback for power supply changes
|
|
* @psy: pointer to the structure power_supply
|
|
*
|
|
* This function is pointing to the function pointer external_power_changed
|
|
* of the structure power_supply.
|
|
* This function gets executed when there is a change in the external power
|
|
* supply to the btemp.
|
|
*/
|
|
static void ab8500_btemp_external_power_changed(struct power_supply *psy)
|
|
{
|
|
struct ab8500_btemp *di = to_ab8500_btemp_device_info(psy);
|
|
|
|
class_for_each_device(power_supply_class, NULL,
|
|
&di->btemp_psy, ab8500_btemp_get_ext_psy_data);
|
|
}
|
|
|
|
/* ab8500 btemp driver interrupts and their respective isr */
|
|
static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = {
|
|
{"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler},
|
|
{"BTEMP_LOW", ab8500_btemp_templow_handler},
|
|
{"BTEMP_HIGH", ab8500_btemp_temphigh_handler},
|
|
{"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler},
|
|
{"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler},
|
|
};
|
|
|
|
#if defined(CONFIG_PM)
|
|
static int ab8500_btemp_resume(struct platform_device *pdev)
|
|
{
|
|
struct ab8500_btemp *di = platform_get_drvdata(pdev);
|
|
|
|
ab8500_btemp_periodic(di, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ab8500_btemp_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct ab8500_btemp *di = platform_get_drvdata(pdev);
|
|
|
|
ab8500_btemp_periodic(di, false);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define ab8500_btemp_suspend NULL
|
|
#define ab8500_btemp_resume NULL
|
|
#endif
|
|
|
|
static int __devexit ab8500_btemp_remove(struct platform_device *pdev)
|
|
{
|
|
struct ab8500_btemp *di = platform_get_drvdata(pdev);
|
|
int i, irq;
|
|
|
|
/* Disable interrupts */
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) {
|
|
irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name);
|
|
free_irq(irq, di);
|
|
}
|
|
|
|
/* Delete the work queue */
|
|
destroy_workqueue(di->btemp_wq);
|
|
|
|
flush_scheduled_work();
|
|
power_supply_unregister(&di->btemp_psy);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(di);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit ab8500_btemp_probe(struct platform_device *pdev)
|
|
{
|
|
int irq, i, ret = 0;
|
|
u8 val;
|
|
struct abx500_bm_plat_data *plat_data = pdev->dev.platform_data;
|
|
struct ab8500_btemp *di;
|
|
|
|
if (!plat_data) {
|
|
dev_err(&pdev->dev, "No platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
di = kzalloc(sizeof(*di), GFP_KERNEL);
|
|
if (!di)
|
|
return -ENOMEM;
|
|
|
|
/* get parent data */
|
|
di->dev = &pdev->dev;
|
|
di->parent = dev_get_drvdata(pdev->dev.parent);
|
|
di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
|
|
|
|
/* get btemp specific platform data */
|
|
di->pdata = plat_data->btemp;
|
|
if (!di->pdata) {
|
|
dev_err(di->dev, "no btemp platform data supplied\n");
|
|
ret = -EINVAL;
|
|
goto free_device_info;
|
|
}
|
|
|
|
/* get battery specific platform data */
|
|
di->bat = plat_data->battery;
|
|
if (!di->bat) {
|
|
dev_err(di->dev, "no battery platform data supplied\n");
|
|
ret = -EINVAL;
|
|
goto free_device_info;
|
|
}
|
|
|
|
/* BTEMP supply */
|
|
di->btemp_psy.name = "ab8500_btemp";
|
|
di->btemp_psy.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
di->btemp_psy.properties = ab8500_btemp_props;
|
|
di->btemp_psy.num_properties = ARRAY_SIZE(ab8500_btemp_props);
|
|
di->btemp_psy.get_property = ab8500_btemp_get_property;
|
|
di->btemp_psy.supplied_to = di->pdata->supplied_to;
|
|
di->btemp_psy.num_supplicants = di->pdata->num_supplicants;
|
|
di->btemp_psy.external_power_changed =
|
|
ab8500_btemp_external_power_changed;
|
|
|
|
|
|
/* Create a work queue for the btemp */
|
|
di->btemp_wq =
|
|
create_singlethread_workqueue("ab8500_btemp_wq");
|
|
if (di->btemp_wq == NULL) {
|
|
dev_err(di->dev, "failed to create work queue\n");
|
|
ret = -ENOMEM;
|
|
goto free_device_info;
|
|
}
|
|
|
|
/* Init work for measuring temperature periodically */
|
|
INIT_DEFERRABLE_WORK(&di->btemp_periodic_work,
|
|
ab8500_btemp_periodic_work);
|
|
|
|
/* Identify the battery */
|
|
if (ab8500_btemp_id(di) < 0)
|
|
dev_warn(di->dev, "failed to identify the battery\n");
|
|
|
|
/* Set BTEMP thermal limits. Low and Med are fixed */
|
|
di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT;
|
|
di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT;
|
|
|
|
ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
|
|
AB8500_BTEMP_HIGH_TH, &val);
|
|
if (ret < 0) {
|
|
dev_err(di->dev, "%s ab8500 read failed\n", __func__);
|
|
goto free_btemp_wq;
|
|
}
|
|
switch (val) {
|
|
case BTEMP_HIGH_TH_57_0:
|
|
case BTEMP_HIGH_TH_57_1:
|
|
di->btemp_ranges.btemp_high_limit =
|
|
BTEMP_THERMAL_HIGH_LIMIT_57;
|
|
break;
|
|
case BTEMP_HIGH_TH_52:
|
|
di->btemp_ranges.btemp_high_limit =
|
|
BTEMP_THERMAL_HIGH_LIMIT_52;
|
|
break;
|
|
case BTEMP_HIGH_TH_62:
|
|
di->btemp_ranges.btemp_high_limit =
|
|
BTEMP_THERMAL_HIGH_LIMIT_62;
|
|
break;
|
|
}
|
|
|
|
/* Register BTEMP power supply class */
|
|
ret = power_supply_register(di->dev, &di->btemp_psy);
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to register BTEMP psy\n");
|
|
goto free_btemp_wq;
|
|
}
|
|
|
|
/* Register interrupts */
|
|
for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) {
|
|
irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name);
|
|
ret = request_threaded_irq(irq, NULL, ab8500_btemp_irq[i].isr,
|
|
IRQF_SHARED | IRQF_NO_SUSPEND,
|
|
ab8500_btemp_irq[i].name, di);
|
|
|
|
if (ret) {
|
|
dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
|
|
, ab8500_btemp_irq[i].name, irq, ret);
|
|
goto free_irq;
|
|
}
|
|
dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
|
|
ab8500_btemp_irq[i].name, irq, ret);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, di);
|
|
|
|
/* Kick off periodic temperature measurements */
|
|
ab8500_btemp_periodic(di, true);
|
|
list_add_tail(&di->node, &ab8500_btemp_list);
|
|
|
|
return ret;
|
|
|
|
free_irq:
|
|
power_supply_unregister(&di->btemp_psy);
|
|
|
|
/* We also have to free all successfully registered irqs */
|
|
for (i = i - 1; i >= 0; i--) {
|
|
irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name);
|
|
free_irq(irq, di);
|
|
}
|
|
free_btemp_wq:
|
|
destroy_workqueue(di->btemp_wq);
|
|
free_device_info:
|
|
kfree(di);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver ab8500_btemp_driver = {
|
|
.probe = ab8500_btemp_probe,
|
|
.remove = __devexit_p(ab8500_btemp_remove),
|
|
.suspend = ab8500_btemp_suspend,
|
|
.resume = ab8500_btemp_resume,
|
|
.driver = {
|
|
.name = "ab8500-btemp",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init ab8500_btemp_init(void)
|
|
{
|
|
return platform_driver_register(&ab8500_btemp_driver);
|
|
}
|
|
|
|
static void __exit ab8500_btemp_exit(void)
|
|
{
|
|
platform_driver_unregister(&ab8500_btemp_driver);
|
|
}
|
|
|
|
subsys_initcall_sync(ab8500_btemp_init);
|
|
module_exit(ab8500_btemp_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
|
|
MODULE_ALIAS("platform:ab8500-btemp");
|
|
MODULE_DESCRIPTION("AB8500 battery temperature driver");
|