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-rw-r--r--drivers/power/supply/act8945a_charger.c662
1 files changed, 662 insertions, 0 deletions
diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c
new file mode 100644
index 0000000000..e9b5f42837
--- /dev/null
+++ b/drivers/power/supply/act8945a_charger.c
@@ -0,0 +1,662 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Power supply driver for the Active-semi ACT8945A PMIC
+ *
+ * Copyright (C) 2015 Atmel Corporation
+ *
+ * Author: Wenyou Yang <wenyou.yang@atmel.com>
+ */
+#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");