| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Wenyou Yang | 2501 | 99.76% | 7 | 87.50% |
| Sergei Shtylyov | 6 | 0.24% | 1 | 12.50% |
| Total | 2507 | 8 |
/* * Power supply driver for the Active-semi ACT8945A PMIC * * Copyright (C) 2015 Atmel Corporation * * Author: Wenyou Yang <wenyou.yang@atmel.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/regmap.h> #include <linux/gpio/consumer.h> static const char *act8945a_charger_model = "ACT8945A"; static const char *act8945a_charger_manufacturer = "Active-semi"; /** * ACT8945A Charger Register Map */ /* 0x70: Reserved */ #define ACT8945A_APCH_CFG 0x71 #define ACT8945A_APCH_STATUS 0x78 #define ACT8945A_APCH_CTRL 0x79 #define ACT8945A_APCH_STATE 0x7A /* ACT8945A_APCH_CFG */ #define APCH_CFG_OVPSET (0x3 << 0) #define APCH_CFG_OVPSET_6V6 (0x0 << 0) #define APCH_CFG_OVPSET_7V (0x1 << 0) #define APCH_CFG_OVPSET_7V5 (0x2 << 0) #define APCH_CFG_OVPSET_8V (0x3 << 0) #define APCH_CFG_PRETIMO (0x3 << 2) #define APCH_CFG_PRETIMO_40_MIN (0x0 << 2) #define APCH_CFG_PRETIMO_60_MIN (0x1 << 2) #define APCH_CFG_PRETIMO_80_MIN (0x2 << 2) #define APCH_CFG_PRETIMO_DISABLED (0x3 << 2) #define APCH_CFG_TOTTIMO (0x3 << 4) #define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4) #define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4) #define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4) #define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4) #define APCH_CFG_SUSCHG (0x1 << 7) #define APCH_STATUS_CHGDAT BIT(0) #define APCH_STATUS_INDAT BIT(1) #define APCH_STATUS_TEMPDAT BIT(2) #define APCH_STATUS_TIMRDAT BIT(3) #define APCH_STATUS_CHGSTAT BIT(4) #define APCH_STATUS_INSTAT BIT(5) #define APCH_STATUS_TEMPSTAT BIT(6) #define APCH_STATUS_TIMRSTAT BIT(7) #define APCH_CTRL_CHGEOCOUT BIT(0) #define APCH_CTRL_INDIS BIT(1) #define APCH_CTRL_TEMPOUT BIT(2) #define APCH_CTRL_TIMRPRE BIT(3) #define APCH_CTRL_CHGEOCIN BIT(4) #define APCH_CTRL_INCON BIT(5) #define APCH_CTRL_TEMPIN BIT(6) #define APCH_CTRL_TIMRTOT BIT(7) #define APCH_STATE_ACINSTAT (0x1 << 1) #define APCH_STATE_CSTATE (0x3 << 4) #define APCH_STATE_CSTATE_SHIFT 4 #define APCH_STATE_CSTATE_DISABLED 0x00 #define APCH_STATE_CSTATE_EOC 0x01 #define APCH_STATE_CSTATE_FAST 0x02 #define APCH_STATE_CSTATE_PRE 0x03 struct act8945a_charger { struct power_supply *psy; struct power_supply_desc desc; struct regmap *regmap; struct work_struct work; bool init_done; struct gpio_desc *lbo_gpio; struct gpio_desc *chglev_gpio; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) { int ret; unsigned int status, state; ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); if (ret < 0) return ret; state &= APCH_STATE_CSTATE; state >>= APCH_STATE_CSTATE_SHIFT; switch (state) { case APCH_STATE_CSTATE_PRE: case APCH_STATE_CSTATE_FAST: *val = POWER_SUPPLY_STATUS_CHARGING; break; case APCH_STATE_CSTATE_EOC: if (status & APCH_STATUS_CHGDAT) *val = POWER_SUPPLY_STATUS_FULL; else *val = POWER_SUPPLY_STATUS_CHARGING; break; case APCH_STATE_CSTATE_DISABLED: default: if (!(status & APCH_STATUS_INDAT)) *val = POWER_SUPPLY_STATUS_DISCHARGING; else *val = POWER_SUPPLY_STATUS_NOT_CHARGING; break; } return 0; } static int act8945a_get_charge_type(struct regmap *regmap, int *val) { int ret; unsigned int status, state; ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); if (ret < 0) return ret; state &= APCH_STATE_CSTATE; state >>= APCH_STATE_CSTATE_SHIFT; switch (state) { case APCH_STATE_CSTATE_PRE: *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; break; case APCH_STATE_CSTATE_FAST: *val = POWER_SUPPLY_CHARGE_TYPE_FAST; break; case APCH_STATE_CSTATE_EOC: *val = POWER_SUPPLY_CHARGE_TYPE_NONE; break; case APCH_STATE_CSTATE_DISABLED: default: if (!(status & APCH_STATUS_INDAT)) *val = POWER_SUPPLY_CHARGE_TYPE_NONE; else *val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; break; } return 0; } static int act8945a_get_battery_health(struct regmap *regmap, int *val) { int ret; unsigned int status, state, config; ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); if (ret < 0) return ret; state &= APCH_STATE_CSTATE; state >>= APCH_STATE_CSTATE_SHIFT; switch (state) { case APCH_STATE_CSTATE_DISABLED: if (config & APCH_CFG_SUSCHG) { *val = POWER_SUPPLY_HEALTH_UNKNOWN; } else if (status & APCH_STATUS_INDAT) { if (!(status & APCH_STATUS_TEMPDAT)) *val = POWER_SUPPLY_HEALTH_OVERHEAT; else if (status & APCH_STATUS_TIMRDAT) *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; else *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; } else { *val = POWER_SUPPLY_HEALTH_GOOD; } break; case APCH_STATE_CSTATE_PRE: case APCH_STATE_CSTATE_FAST: case APCH_STATE_CSTATE_EOC: default: *val = POWER_SUPPLY_HEALTH_GOOD; break; } return 0; } static int act8945a_get_capacity_level(struct act8945a_charger *charger, struct regmap *regmap, int *val) { int ret; unsigned int status, state, config; int lbo_level = gpiod_get_value(charger->lbo_gpio); ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); if (ret < 0) return ret; state &= APCH_STATE_CSTATE; state >>= APCH_STATE_CSTATE_SHIFT; switch (state) { case APCH_STATE_CSTATE_PRE: *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW; break; case APCH_STATE_CSTATE_FAST: if (lbo_level) *val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; else *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW; break; case APCH_STATE_CSTATE_EOC: if (status & APCH_STATUS_CHGDAT) *val = POWER_SUPPLY_CAPACITY_LEVEL_FULL; else *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; break; case APCH_STATE_CSTATE_DISABLED: default: if (config & APCH_CFG_SUSCHG) { *val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; } else { *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; if (!(status & APCH_STATUS_INDAT)) { if (!lbo_level) *val = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; } } break; } return 0; } #define MAX_CURRENT_USB_HIGH 450000 #define MAX_CURRENT_USB_LOW 90000 #define MAX_CURRENT_USB_PRE 45000 /* * Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205 * Riset = 2.43K */ #define MAX_CURRENT_AC_HIGH 886527 #define MAX_CURRENT_AC_LOW 117305 #define MAX_CURRENT_AC_HIGH_PRE 88653 #define MAX_CURRENT_AC_LOW_PRE 11731 static int act8945a_get_current_max(struct act8945a_charger *charger, struct regmap *regmap, int *val) { int ret; unsigned int status, state; unsigned int acin_state; int chgin_level = gpiod_get_value(charger->chglev_gpio); ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); if (ret < 0) return ret; ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); if (ret < 0) return ret; acin_state = (state & APCH_STATE_ACINSTAT) >> 1; state &= APCH_STATE_CSTATE; state >>= APCH_STATE_CSTATE_SHIFT; switch (state) { case APCH_STATE_CSTATE_PRE: if (acin_state) { if (chgin_level) *val = MAX_CURRENT_AC_HIGH_PRE; else *val = MAX_CURRENT_AC_LOW_PRE; } else { *val = MAX_CURRENT_USB_PRE; } break; case APCH_STATE_CSTATE_FAST: if (acin_state) { if (chgin_level) *val = MAX_CURRENT_AC_HIGH; else *val = MAX_CURRENT_AC_LOW; } else { if (chgin_level) *val = MAX_CURRENT_USB_HIGH; else *val = MAX_CURRENT_USB_LOW; } break; case APCH_STATE_CSTATE_EOC: case APCH_STATE_CSTATE_DISABLED: default: *val = 0; break; } return 0; } static enum power_supply_property act8945a_charger_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CAPACITY_LEVEL, POWER_SUPPLY_PROP_CURRENT_MAX, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_MANUFACTURER }; static int act8945a_charger_get_property(struct power_supply *psy, enum power_supply_property prop, union power_supply_propval *val) { struct act8945a_charger *charger = power_supply_get_drvdata(psy); struct regmap *regmap = charger->regmap; int ret = 0; switch (prop) { case POWER_SUPPLY_PROP_STATUS: ret = act8945a_get_charger_state(regmap, &val->intval); break; case POWER_SUPPLY_PROP_CHARGE_TYPE: ret = act8945a_get_charge_type(regmap, &val->intval); break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; case POWER_SUPPLY_PROP_HEALTH: ret = act8945a_get_battery_health(regmap, &val->intval); break; case POWER_SUPPLY_PROP_CAPACITY_LEVEL: ret = act8945a_get_capacity_level(charger, regmap, &val->intval); break; case POWER_SUPPLY_PROP_CURRENT_MAX: ret = act8945a_get_current_max(charger, regmap, &val->intval); break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = act8945a_charger_model; break; case POWER_SUPPLY_PROP_MANUFACTURER: val->strval = act8945a_charger_manufacturer; break; default: return -EINVAL; } return ret; } static int act8945a_enable_interrupt(struct act8945a_charger *charger) { struct regmap *regmap = charger->regmap; unsigned char ctrl; int ret; ctrl = APCH_CTRL_CHGEOCOUT | APCH_CTRL_CHGEOCIN | APCH_CTRL_INDIS | APCH_CTRL_INCON | APCH_CTRL_TEMPOUT | APCH_CTRL_TEMPIN | APCH_CTRL_TIMRPRE | APCH_CTRL_TIMRTOT; ret = regmap_write(regmap, ACT8945A_APCH_CTRL, ctrl); if (ret) return ret; ctrl = APCH_STATUS_CHGSTAT | APCH_STATUS_INSTAT | APCH_STATUS_TEMPSTAT | APCH_STATUS_TIMRSTAT; ret = regmap_write(regmap, ACT8945A_APCH_STATUS, ctrl); if (ret) return ret; return 0; } static unsigned int act8945a_set_supply_type(struct act8945a_charger *charger, unsigned int *type) { unsigned int status, state; int ret; ret = regmap_read(charger->regmap, ACT8945A_APCH_STATUS, &status); if (ret < 0) return ret; ret = regmap_read(charger->regmap, ACT8945A_APCH_STATE, &state); if (ret < 0) return ret; if (status & APCH_STATUS_INDAT) { if (state & APCH_STATE_ACINSTAT) *type = POWER_SUPPLY_TYPE_MAINS; else *type = POWER_SUPPLY_TYPE_USB; } else { *type = POWER_SUPPLY_TYPE_BATTERY; } return 0; } static void act8945a_work(struct work_struct *work) { struct act8945a_charger *charger = container_of(work, struct act8945a_charger, work); act8945a_set_supply_type(charger, &charger->desc.type); power_supply_changed(charger->psy); } static irqreturn_t act8945a_status_changed(int irq, void *dev_id) { struct act8945a_charger *charger = dev_id; if (charger->init_done) schedule_work(&charger->work); return IRQ_HANDLED; } #define DEFAULT_TOTAL_TIME_OUT 3 #define DEFAULT_PRE_TIME_OUT 40 #define DEFAULT_INPUT_OVP_THRESHOLD 6600 static int act8945a_charger_config(struct device *dev, struct act8945a_charger *charger) { struct device_node *np = dev->of_node; struct regmap *regmap = charger->regmap; u32 total_time_out; u32 pre_time_out; u32 input_voltage_threshold; int err, ret; unsigned int tmp; unsigned int value = 0; if (!np) { dev_err(dev, "no charger of node\n"); return -EINVAL; } ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp); if (ret) return ret; if (tmp & APCH_CFG_SUSCHG) { value |= APCH_CFG_SUSCHG; dev_info(dev, "have been suspended\n"); } charger->lbo_gpio = devm_gpiod_get_optional(dev, "active-semi,lbo", GPIOD_IN); if (IS_ERR(charger->lbo_gpio)) { err = PTR_ERR(charger->lbo_gpio); dev_err(dev, "unable to claim gpio \"lbo\": %d\n", err); return err; } ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio), act8945a_status_changed, (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING), "act8945a_lbo_detect", charger); if (ret) dev_info(dev, "failed to request gpio \"lbo\" IRQ\n"); charger->chglev_gpio = devm_gpiod_get_optional(dev, "active-semi,chglev", GPIOD_IN); if (IS_ERR(charger->chglev_gpio)) { err = PTR_ERR(charger->chglev_gpio); dev_err(dev, "unable to claim gpio \"chglev\": %d\n", err); return err; } if (of_property_read_u32(np, "active-semi,input-voltage-threshold-microvolt", &input_voltage_threshold)) input_voltage_threshold = DEFAULT_INPUT_OVP_THRESHOLD; if (of_property_read_u32(np, "active-semi,precondition-timeout", &pre_time_out)) pre_time_out = DEFAULT_PRE_TIME_OUT; if (of_property_read_u32(np, "active-semi,total-timeout", &total_time_out)) total_time_out = DEFAULT_TOTAL_TIME_OUT; switch (input_voltage_threshold) { case 8000: value |= APCH_CFG_OVPSET_8V; break; case 7500: value |= APCH_CFG_OVPSET_7V5; break; case 7000: value |= APCH_CFG_OVPSET_7V; break; case 6600: default: value |= APCH_CFG_OVPSET_6V6; break; } switch (pre_time_out) { case 60: value |= APCH_CFG_PRETIMO_60_MIN; break; case 80: value |= APCH_CFG_PRETIMO_80_MIN; break; case 0: value |= APCH_CFG_PRETIMO_DISABLED; break; case 40: default: value |= APCH_CFG_PRETIMO_40_MIN; break; } switch (total_time_out) { case 4: value |= APCH_CFG_TOTTIMO_4_HOUR; break; case 5: value |= APCH_CFG_TOTTIMO_5_HOUR; break; case 0: value |= APCH_CFG_TOTTIMO_DISABLED; break; case 3: default: value |= APCH_CFG_TOTTIMO_3_HOUR; break; } return regmap_write(regmap, ACT8945A_APCH_CFG, value); } static int act8945a_charger_probe(struct platform_device *pdev) { struct act8945a_charger *charger; struct power_supply_config psy_cfg = {}; int irq, ret; charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL); if (!charger) return -ENOMEM; charger->regmap = dev_get_regmap(pdev->dev.parent, NULL); if (!charger->regmap) { dev_err(&pdev->dev, "Parent did not provide regmap\n"); return -EINVAL; } ret = act8945a_charger_config(&pdev->dev, charger); if (ret) return ret; irq = of_irq_get(pdev->dev.of_node, 0); if (irq <= 0) { dev_err(&pdev->dev, "failed to find IRQ number\n"); return irq ?: -ENXIO; } ret = devm_request_irq(&pdev->dev, irq, act8945a_status_changed, IRQF_TRIGGER_FALLING, "act8945a_interrupt", charger); if (ret) { dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n"); return ret; } charger->desc.name = "act8945a-charger"; charger->desc.get_property = act8945a_charger_get_property; charger->desc.properties = act8945a_charger_props; charger->desc.num_properties = ARRAY_SIZE(act8945a_charger_props); ret = act8945a_set_supply_type(charger, &charger->desc.type); if (ret) return -EINVAL; psy_cfg.of_node = pdev->dev.of_node; psy_cfg.drv_data = charger; charger->psy = devm_power_supply_register(&pdev->dev, &charger->desc, &psy_cfg); if (IS_ERR(charger->psy)) { dev_err(&pdev->dev, "failed to register power supply\n"); return PTR_ERR(charger->psy); } platform_set_drvdata(pdev, charger); INIT_WORK(&charger->work, act8945a_work); ret = act8945a_enable_interrupt(charger); if (ret) return -EIO; charger->init_done = true; return 0; } static int act8945a_charger_remove(struct platform_device *pdev) { struct act8945a_charger *charger = platform_get_drvdata(pdev); charger->init_done = false; cancel_work_sync(&charger->work); return 0; } static struct platform_driver act8945a_charger_driver = { .driver = { .name = "act8945a-charger", }, .probe = act8945a_charger_probe, .remove = act8945a_charger_remove, }; module_platform_driver(act8945a_charger_driver); MODULE_DESCRIPTION("Active-semi ACT8945A ActivePath charger driver"); MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); MODULE_LICENSE("GPL");
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