663 lines
16 KiB
C
663 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Power supply driver for the Active-semi ACT8945A PMIC
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*
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* Copyright (C) 2015 Atmel Corporation
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*
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* Author: Wenyou Yang <wenyou.yang@atmel.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_irq.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/regmap.h>
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#include <linux/gpio/consumer.h>
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static const char *act8945a_charger_model = "ACT8945A";
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static const char *act8945a_charger_manufacturer = "Active-semi";
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/*
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* ACT8945A Charger Register Map
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*/
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/* 0x70: Reserved */
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#define ACT8945A_APCH_CFG 0x71
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#define ACT8945A_APCH_STATUS 0x78
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#define ACT8945A_APCH_CTRL 0x79
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#define ACT8945A_APCH_STATE 0x7A
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/* ACT8945A_APCH_CFG */
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#define APCH_CFG_OVPSET (0x3 << 0)
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#define APCH_CFG_OVPSET_6V6 (0x0 << 0)
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#define APCH_CFG_OVPSET_7V (0x1 << 0)
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#define APCH_CFG_OVPSET_7V5 (0x2 << 0)
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#define APCH_CFG_OVPSET_8V (0x3 << 0)
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#define APCH_CFG_PRETIMO (0x3 << 2)
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#define APCH_CFG_PRETIMO_40_MIN (0x0 << 2)
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#define APCH_CFG_PRETIMO_60_MIN (0x1 << 2)
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#define APCH_CFG_PRETIMO_80_MIN (0x2 << 2)
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#define APCH_CFG_PRETIMO_DISABLED (0x3 << 2)
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#define APCH_CFG_TOTTIMO (0x3 << 4)
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#define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4)
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#define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4)
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#define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4)
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#define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4)
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#define APCH_CFG_SUSCHG (0x1 << 7)
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#define APCH_STATUS_CHGDAT BIT(0)
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#define APCH_STATUS_INDAT BIT(1)
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#define APCH_STATUS_TEMPDAT BIT(2)
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#define APCH_STATUS_TIMRDAT BIT(3)
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#define APCH_STATUS_CHGSTAT BIT(4)
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#define APCH_STATUS_INSTAT BIT(5)
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#define APCH_STATUS_TEMPSTAT BIT(6)
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#define APCH_STATUS_TIMRSTAT BIT(7)
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#define APCH_CTRL_CHGEOCOUT BIT(0)
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#define APCH_CTRL_INDIS BIT(1)
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#define APCH_CTRL_TEMPOUT BIT(2)
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#define APCH_CTRL_TIMRPRE BIT(3)
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#define APCH_CTRL_CHGEOCIN BIT(4)
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#define APCH_CTRL_INCON BIT(5)
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#define APCH_CTRL_TEMPIN BIT(6)
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#define APCH_CTRL_TIMRTOT BIT(7)
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#define APCH_STATE_ACINSTAT (0x1 << 1)
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#define APCH_STATE_CSTATE (0x3 << 4)
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#define APCH_STATE_CSTATE_SHIFT 4
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#define APCH_STATE_CSTATE_DISABLED 0x00
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#define APCH_STATE_CSTATE_EOC 0x01
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#define APCH_STATE_CSTATE_FAST 0x02
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#define APCH_STATE_CSTATE_PRE 0x03
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struct act8945a_charger {
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struct power_supply *psy;
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struct power_supply_desc desc;
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struct regmap *regmap;
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struct work_struct work;
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bool init_done;
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struct gpio_desc *lbo_gpio;
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struct gpio_desc *chglev_gpio;
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};
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static int act8945a_get_charger_state(struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int status, state;
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ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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state &= APCH_STATE_CSTATE;
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state >>= APCH_STATE_CSTATE_SHIFT;
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switch (state) {
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case APCH_STATE_CSTATE_PRE:
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case APCH_STATE_CSTATE_FAST:
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*val = POWER_SUPPLY_STATUS_CHARGING;
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break;
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case APCH_STATE_CSTATE_EOC:
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if (status & APCH_STATUS_CHGDAT)
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*val = POWER_SUPPLY_STATUS_FULL;
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else
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*val = POWER_SUPPLY_STATUS_CHARGING;
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break;
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case APCH_STATE_CSTATE_DISABLED:
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default:
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if (!(status & APCH_STATUS_INDAT))
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*val = POWER_SUPPLY_STATUS_DISCHARGING;
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else
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*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
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break;
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}
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return 0;
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}
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static int act8945a_get_charge_type(struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int status, state;
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ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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state &= APCH_STATE_CSTATE;
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state >>= APCH_STATE_CSTATE_SHIFT;
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switch (state) {
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case APCH_STATE_CSTATE_PRE:
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*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
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break;
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case APCH_STATE_CSTATE_FAST:
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*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
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break;
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case APCH_STATE_CSTATE_EOC:
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*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
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break;
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case APCH_STATE_CSTATE_DISABLED:
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default:
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if (!(status & APCH_STATUS_INDAT))
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*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
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else
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*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
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break;
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}
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return 0;
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}
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static int act8945a_get_battery_health(struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int status, state, config;
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ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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state &= APCH_STATE_CSTATE;
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state >>= APCH_STATE_CSTATE_SHIFT;
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switch (state) {
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case APCH_STATE_CSTATE_DISABLED:
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if (config & APCH_CFG_SUSCHG) {
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*val = POWER_SUPPLY_HEALTH_UNKNOWN;
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} else if (status & APCH_STATUS_INDAT) {
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if (!(status & APCH_STATUS_TEMPDAT))
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*val = POWER_SUPPLY_HEALTH_OVERHEAT;
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else if (status & APCH_STATUS_TIMRDAT)
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*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
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else
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*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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} else {
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*val = POWER_SUPPLY_HEALTH_GOOD;
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}
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break;
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case APCH_STATE_CSTATE_PRE:
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case APCH_STATE_CSTATE_FAST:
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case APCH_STATE_CSTATE_EOC:
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default:
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*val = POWER_SUPPLY_HEALTH_GOOD;
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break;
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}
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return 0;
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}
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static int act8945a_get_capacity_level(struct act8945a_charger *charger,
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struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int status, state, config;
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int lbo_level = gpiod_get_value(charger->lbo_gpio);
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ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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state &= APCH_STATE_CSTATE;
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state >>= APCH_STATE_CSTATE_SHIFT;
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switch (state) {
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case APCH_STATE_CSTATE_PRE:
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*val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
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break;
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case APCH_STATE_CSTATE_FAST:
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if (lbo_level)
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*val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
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else
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*val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
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break;
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case APCH_STATE_CSTATE_EOC:
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if (status & APCH_STATUS_CHGDAT)
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*val = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
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else
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*val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
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break;
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case APCH_STATE_CSTATE_DISABLED:
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default:
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if (config & APCH_CFG_SUSCHG) {
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*val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
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} else {
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*val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
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if (!(status & APCH_STATUS_INDAT)) {
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if (!lbo_level)
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*val = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
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}
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}
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break;
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}
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return 0;
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}
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#define MAX_CURRENT_USB_HIGH 450000
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#define MAX_CURRENT_USB_LOW 90000
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#define MAX_CURRENT_USB_PRE 45000
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/*
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* Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205
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* Riset = 2.43K
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*/
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#define MAX_CURRENT_AC_HIGH 886527
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#define MAX_CURRENT_AC_LOW 117305
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#define MAX_CURRENT_AC_HIGH_PRE 88653
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#define MAX_CURRENT_AC_LOW_PRE 11731
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static int act8945a_get_current_max(struct act8945a_charger *charger,
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struct regmap *regmap, int *val)
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{
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int ret;
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unsigned int status, state;
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unsigned int acin_state;
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int chgin_level = gpiod_get_value(charger->chglev_gpio);
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ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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acin_state = (state & APCH_STATE_ACINSTAT) >> 1;
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state &= APCH_STATE_CSTATE;
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state >>= APCH_STATE_CSTATE_SHIFT;
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switch (state) {
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case APCH_STATE_CSTATE_PRE:
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if (acin_state) {
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if (chgin_level)
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*val = MAX_CURRENT_AC_HIGH_PRE;
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else
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*val = MAX_CURRENT_AC_LOW_PRE;
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} else {
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*val = MAX_CURRENT_USB_PRE;
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}
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break;
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case APCH_STATE_CSTATE_FAST:
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if (acin_state) {
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if (chgin_level)
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*val = MAX_CURRENT_AC_HIGH;
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else
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*val = MAX_CURRENT_AC_LOW;
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} else {
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if (chgin_level)
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*val = MAX_CURRENT_USB_HIGH;
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else
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*val = MAX_CURRENT_USB_LOW;
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}
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break;
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case APCH_STATE_CSTATE_EOC:
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case APCH_STATE_CSTATE_DISABLED:
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default:
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*val = 0;
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break;
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}
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return 0;
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}
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static enum power_supply_property act8945a_charger_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_CHARGE_TYPE,
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POWER_SUPPLY_PROP_TECHNOLOGY,
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POWER_SUPPLY_PROP_HEALTH,
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POWER_SUPPLY_PROP_CAPACITY_LEVEL,
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POWER_SUPPLY_PROP_CURRENT_MAX,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER
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};
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static int act8945a_charger_get_property(struct power_supply *psy,
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enum power_supply_property prop,
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union power_supply_propval *val)
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{
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struct act8945a_charger *charger = power_supply_get_drvdata(psy);
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struct regmap *regmap = charger->regmap;
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int ret = 0;
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switch (prop) {
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case POWER_SUPPLY_PROP_STATUS:
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ret = act8945a_get_charger_state(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_CHARGE_TYPE:
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ret = act8945a_get_charge_type(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_TECHNOLOGY:
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val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
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break;
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case POWER_SUPPLY_PROP_HEALTH:
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ret = act8945a_get_battery_health(regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
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ret = act8945a_get_capacity_level(charger,
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regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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ret = act8945a_get_current_max(charger,
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regmap, &val->intval);
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = act8945a_charger_model;
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break;
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case POWER_SUPPLY_PROP_MANUFACTURER:
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val->strval = act8945a_charger_manufacturer;
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break;
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default:
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return -EINVAL;
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}
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return ret;
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}
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static int act8945a_enable_interrupt(struct act8945a_charger *charger)
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{
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struct regmap *regmap = charger->regmap;
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unsigned char ctrl;
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int ret;
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ctrl = APCH_CTRL_CHGEOCOUT | APCH_CTRL_CHGEOCIN |
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APCH_CTRL_INDIS | APCH_CTRL_INCON |
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APCH_CTRL_TEMPOUT | APCH_CTRL_TEMPIN |
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APCH_CTRL_TIMRPRE | APCH_CTRL_TIMRTOT;
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ret = regmap_write(regmap, ACT8945A_APCH_CTRL, ctrl);
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if (ret)
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return ret;
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ctrl = APCH_STATUS_CHGSTAT | APCH_STATUS_INSTAT |
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APCH_STATUS_TEMPSTAT | APCH_STATUS_TIMRSTAT;
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ret = regmap_write(regmap, ACT8945A_APCH_STATUS, ctrl);
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if (ret)
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return ret;
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return 0;
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}
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static unsigned int act8945a_set_supply_type(struct act8945a_charger *charger,
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unsigned int *type)
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{
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unsigned int status, state;
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int ret;
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ret = regmap_read(charger->regmap, ACT8945A_APCH_STATUS, &status);
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if (ret < 0)
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return ret;
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ret = regmap_read(charger->regmap, ACT8945A_APCH_STATE, &state);
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if (ret < 0)
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return ret;
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if (status & APCH_STATUS_INDAT) {
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if (state & APCH_STATE_ACINSTAT)
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*type = POWER_SUPPLY_TYPE_MAINS;
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else
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*type = POWER_SUPPLY_TYPE_USB;
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} else {
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*type = POWER_SUPPLY_TYPE_BATTERY;
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}
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return 0;
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}
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static void act8945a_work(struct work_struct *work)
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{
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struct act8945a_charger *charger =
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container_of(work, struct act8945a_charger, work);
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act8945a_set_supply_type(charger, &charger->desc.type);
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power_supply_changed(charger->psy);
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}
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static irqreturn_t act8945a_status_changed(int irq, void *dev_id)
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{
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struct act8945a_charger *charger = dev_id;
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if (charger->init_done)
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schedule_work(&charger->work);
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return IRQ_HANDLED;
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}
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#define DEFAULT_TOTAL_TIME_OUT 3
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#define DEFAULT_PRE_TIME_OUT 40
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#define DEFAULT_INPUT_OVP_THRESHOLD 6600
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static int act8945a_charger_config(struct device *dev,
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struct act8945a_charger *charger)
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{
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struct device_node *np = dev->of_node;
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struct regmap *regmap = charger->regmap;
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u32 total_time_out;
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u32 pre_time_out;
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u32 input_voltage_threshold;
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int err, ret;
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unsigned int tmp;
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unsigned int value = 0;
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if (!np) {
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dev_err(dev, "no charger of node\n");
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return -EINVAL;
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}
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ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp);
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if (ret)
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return ret;
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if (tmp & APCH_CFG_SUSCHG) {
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value |= APCH_CFG_SUSCHG;
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dev_info(dev, "have been suspended\n");
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}
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charger->lbo_gpio = devm_gpiod_get_optional(dev, "active-semi,lbo",
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GPIOD_IN);
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if (IS_ERR(charger->lbo_gpio)) {
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err = PTR_ERR(charger->lbo_gpio);
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dev_err(dev, "unable to claim gpio \"lbo\": %d\n", err);
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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");
|