diff options
Diffstat (limited to 'drivers/power/act8945a_charger.c')
| -rw-r--r-- | drivers/power/act8945a_charger.c | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c deleted file mode 100644 index b5c00e4..0000000 --- a/drivers/power/act8945a_charger.c +++ /dev/null @@ -1,359 +0,0 @@ -/* - * 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/module.h> -#include <linux/of.h> -#include <linux/of_gpio.h> -#include <linux/platform_device.h> -#include <linux/power_supply.h> -#include <linux/regmap.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 regmap *regmap; - bool battery_temperature; -}; - -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; - - if (state == APCH_STATE_CSTATE_EOC) { - if (status & APCH_STATUS_CHGDAT) - *val = POWER_SUPPLY_STATUS_FULL; - else - *val = POWER_SUPPLY_STATUS_NOT_CHARGING; - } else if ((state == APCH_STATE_CSTATE_FAST) || - (state == APCH_STATE_CSTATE_PRE)) { - *val = POWER_SUPPLY_STATUS_CHARGING; - } else { - *val = POWER_SUPPLY_STATUS_NOT_CHARGING; - } - - return 0; -} - -static int act8945a_get_charge_type(struct regmap *regmap, int *val) -{ - int ret; - unsigned int state; - - 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: - case APCH_STATE_CSTATE_DISABLED: - default: - *val = POWER_SUPPLY_CHARGE_TYPE_NONE; - } - - return 0; -} - -static int act8945a_get_battery_health(struct act8945a_charger *charger, - struct regmap *regmap, int *val) -{ - int ret; - unsigned int status; - - ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); - if (ret < 0) - return ret; - - if (charger->battery_temperature && !(status & APCH_STATUS_TEMPDAT)) - *val = POWER_SUPPLY_HEALTH_OVERHEAT; - else if (!(status & APCH_STATUS_INDAT)) - *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; - else if (status & APCH_STATUS_TIMRDAT) - *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; - else - *val = POWER_SUPPLY_HEALTH_GOOD; - - 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_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(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 const struct power_supply_desc act8945a_charger_desc = { - .name = "act8945a-charger", - .type = POWER_SUPPLY_TYPE_BATTERY, - .get_property = act8945a_charger_get_property, - .properties = act8945a_charger_props, - .num_properties = ARRAY_SIZE(act8945a_charger_props), -}; - -#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; - enum of_gpio_flags flags; - struct regmap *regmap = charger->regmap; - - u32 total_time_out; - u32 pre_time_out; - u32 input_voltage_threshold; - int chglev_pin; - - unsigned int value = 0; - - if (!np) { - dev_err(dev, "no charger of node\n"); - return -EINVAL; - } - - charger->battery_temperature = of_property_read_bool(np, - "active-semi,check-battery-temperature"); - - chglev_pin = of_get_named_gpio_flags(np, - "active-semi,chglev-gpios", 0, &flags); - - if (gpio_is_valid(chglev_pin)) { - gpio_set_value(chglev_pin, - ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1)); - } - - 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 *psy; - struct power_supply_config psy_cfg = {}; - int 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.parent, charger); - if (ret) - return ret; - - psy_cfg.of_node = pdev->dev.parent->of_node; - psy_cfg.drv_data = charger; - - psy = devm_power_supply_register(&pdev->dev, - &act8945a_charger_desc, - &psy_cfg); - if (IS_ERR(psy)) { - dev_err(&pdev->dev, "failed to register power supply\n"); - return PTR_ERR(psy); - } - - return 0; -} - -static struct platform_driver act8945a_charger_driver = { - .driver = { - .name = "act8945a-charger", - }, - .probe = act8945a_charger_probe, -}; -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"); |
