Add driver for Maxim 77705 switch-mode charger (part of max77705
MFD driver) providing power supply class information to userspace.
The driver is configured through DTS (battery and system related
settings).
Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
Changes for v8:
- join lines, where fits 100 chars
- change comment style C++ -> C
- remove author from 'based on' file header statement
Changes for v6:
- add i2c init in driver
- replace remove_new back on remove
- handle IS_ERR(i2c_chg)
Changes for v5:
- remove const modifier from max77705_charger_irq_chip
because it's modified with irq_drv_data in probe function
- fix license to GPL 2.0 only, where old vendor code used
GPL 2.0 only
- move power header to power include dir
- use same hardware name in Kconfig and module descriptions
Changes for v4:
- start from scratch
- change word delimiters in filenames to '_'
- use GENMASK in header
- remove debugfs code
- migrate to regmap_add_irq_chip
- fix property getters to follow the same style
---
drivers/power/supply/Kconfig | 6 ++
drivers/power/supply/Makefile | 1 +
drivers/power/supply/max77705_charger.c | 598 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/power/max77705_charger.h | 216 +++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 821 insertions(+)
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 9f2eef6787f7..66264036b65d 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -583,6 +583,12 @@ config CHARGER_MAX77693
help
Say Y to enable support for the Maxim MAX77693 battery charger.
+config CHARGER_MAX77705
+ tristate "Maxim MAX77705 battery charger driver"
+ depends on MFD_MAX77705
+ help
+ Say Y to enable support for the Maxim MAX77705 battery charger.
+
config CHARGER_MAX77976
tristate "Maxim MAX77976 battery charger driver"
depends on I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 59c4a9f40d28..85d65b7aee1c 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
obj-$(CONFIG_CHARGER_DETECTOR_MAX14656) += max14656_charger_detector.o
obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o
obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
+obj-$(CONFIG_CHARGER_MAX77705) += max77705_charger.o
obj-$(CONFIG_CHARGER_MAX77976) += max77976_charger.o
obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
diff --git a/drivers/power/supply/max77705_charger.c b/drivers/power/supply/max77705_charger.c
new file mode 100644
index 000000000000..060b1b9042be
--- /dev/null
+++ b/drivers/power/supply/max77705_charger.c
@@ -0,0 +1,598 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Based on max77650-charger.c
+ *
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org>
+ *
+ * Battery charger driver for MAXIM 77705 charger/power-supply.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/power/max77705_charger.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#define I2C_ADDR_CHG 0x69
+
+static const char *max77705_charger_model = "max77705";
+static const char *max77705_charger_manufacturer = "Maxim Integrated";
+
+static const struct regmap_config max77705_chg_regmap_config = {
+ .reg_base = MAX77705_CHG_REG_BASE,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77705_CHG_REG_SAFEOUT_CTRL,
+};
+
+static enum power_supply_property max77705_charger_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+};
+
+static int max77705_chgin_irq(void *irq_drv_data)
+{
+ struct max77705_charger_data *charger = irq_drv_data;
+
+ queue_work(charger->wqueue, &charger->chgin_work);
+
+ return 0;
+}
+
+static const struct regmap_irq max77705_charger_irqs[] = {
+ { .mask = MAX77705_BYP_IM, },
+ { .mask = MAX77705_INP_LIMIT_IM, },
+ { .mask = MAX77705_BATP_IM, },
+ { .mask = MAX77705_BAT_IM, },
+ { .mask = MAX77705_CHG_IM, },
+ { .mask = MAX77705_WCIN_IM, },
+ { .mask = MAX77705_CHGIN_IM, },
+ { .mask = MAX77705_AICL_IM, },
+};
+
+static struct regmap_irq_chip max77705_charger_irq_chip = {
+ .name = "max77705-charger",
+ .status_base = MAX77705_CHG_REG_INT,
+ .mask_base = MAX77705_CHG_REG_INT_MASK,
+ .handle_post_irq = max77705_chgin_irq,
+ .num_regs = 1,
+ .irqs = max77705_charger_irqs,
+ .num_irqs = ARRAY_SIZE(max77705_charger_irqs),
+};
+
+static int max77705_charger_enable(struct max77705_charger_data *chg)
+{
+ int rv;
+
+ rv = regmap_update_bits(chg->regmap, MAX77705_CHG_REG_CNFG_09,
+ MAX77705_CHG_EN_MASK, MAX77705_CHG_EN_MASK);
+ if (rv)
+ dev_err(chg->dev, "unable to enable the charger: %d\n", rv);
+
+ return rv;
+}
+
+static void max77705_charger_disable(struct max77705_charger_data *chg)
+{
+ int rv;
+
+ rv = regmap_update_bits(chg->regmap,
+ MAX77705_CHG_REG_CNFG_09,
+ MAX77705_CHG_EN_MASK,
+ MAX77705_CHG_DISABLE);
+ if (rv)
+ dev_err(chg->dev, "unable to disable the charger: %d\n", rv);
+}
+
+static int max77705_get_online(struct regmap *regmap, int *val)
+{
+ unsigned int data;
+ int ret;
+
+ ret = regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &data);
+ if (ret < 0)
+ return ret;
+
+ *val = !!(data & MAX77705_CHGIN_OK);
+
+ return 0;
+}
+
+static int max77705_check_battery(struct max77705_charger_data *charger, int *val)
+{
+ unsigned int reg_data;
+ unsigned int reg_data2;
+ struct regmap *regmap = charger->regmap;
+
+
+ regmap_read(regmap, MAX77705_CHG_REG_INT_OK, ®_data);
+
+ dev_dbg(charger->dev, "CHG_INT_OK(0x%x)\n", reg_data);
+
+ regmap_read(regmap,
+ MAX77705_CHG_REG_DETAILS_00, ®_data2);
+
+ dev_dbg(charger->dev, "CHG_DETAILS00(0x%x)\n", reg_data2);
+
+ if ((reg_data & MAX77705_BATP_OK) || !(reg_data2 & MAX77705_BATP_DTLS))
+ *val = true;
+ else
+ *val = false;
+
+ return 0;
+}
+
+static int max77705_get_charge_type(struct max77705_charger_data *charger, int *val)
+{
+ struct regmap *regmap = charger->regmap;
+ unsigned int reg_data;
+
+ regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, ®_data);
+ if (!MAX77705_CHARGER_CHG_CHARGING(reg_data)) {
+ *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ return 0;
+ }
+
+ regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, ®_data);
+ reg_data &= MAX77705_CHG_DTLS;
+
+ switch (reg_data) {
+ case 0x0:
+ case MAX77705_CHARGER_CONSTANT_CURRENT:
+ case MAX77705_CHARGER_CONSTANT_VOLTAGE:
+ *val = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ return 0;
+ default:
+ *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int max77705_get_status(struct max77705_charger_data *charger, int *val)
+{
+ struct regmap *regmap = charger->regmap;
+ unsigned int reg_data;
+
+ regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, ®_data);
+ if (!MAX77705_CHARGER_CHG_CHARGING(reg_data)) {
+ *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ return 0;
+ }
+
+ regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, ®_data);
+ reg_data &= MAX77705_CHG_DTLS;
+
+ switch (reg_data) {
+ case 0x0:
+ case MAX77705_CHARGER_CONSTANT_CURRENT:
+ case MAX77705_CHARGER_CONSTANT_VOLTAGE:
+ *val = POWER_SUPPLY_STATUS_CHARGING;
+ return 0;
+ case MAX77705_CHARGER_END_OF_CHARGE:
+ case MAX77705_CHARGER_DONE:
+ *val = POWER_SUPPLY_STATUS_FULL;
+ return 0;
+ /* those values hard coded as in vendor kernel, because of */
+ /* failure to determine it's actual meaning. */
+ case 0x05:
+ case 0x06:
+ case 0x07:
+ *val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ return 0;
+ case 0x08:
+ case 0xA:
+ case 0xB:
+ *val = POWER_SUPPLY_STATUS_DISCHARGING;
+ return 0;
+ default:
+ *val = POWER_SUPPLY_STATUS_UNKNOWN;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int max77705_get_vbus_state(struct regmap *regmap, int *value)
+{
+ int ret;
+ unsigned int charge_dtls;
+
+ ret = regmap_read(regmap, MAX77705_CHG_REG_DETAILS_00, &charge_dtls);
+ if (ret)
+ return ret;
+
+ charge_dtls = ((charge_dtls & MAX77705_CHGIN_DTLS) >>
+ MAX77705_CHGIN_DTLS_SHIFT);
+
+ switch (charge_dtls) {
+ case 0x00:
+ *value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
+ break;
+ case 0x01:
+ *value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
+ break;
+ case 0x02:
+ *value = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+ case 0x03:
+ *value = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+static int max77705_get_battery_health(struct max77705_charger_data *charger,
+ int *value)
+{
+ struct regmap *regmap = charger->regmap;
+ unsigned int bat_dtls;
+
+ regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &bat_dtls);
+ bat_dtls = ((bat_dtls & MAX77705_BAT_DTLS) >> MAX77705_BAT_DTLS_SHIFT);
+
+ switch (bat_dtls) {
+ case MAX77705_BATTERY_NOBAT:
+ dev_dbg(charger->dev, "%s: No battery and the charger is suspended\n",
+ __func__);
+ *value = POWER_SUPPLY_HEALTH_NO_BATTERY;
+ break;
+ case MAX77705_BATTERY_PREQUALIFICATION:
+ dev_dbg(charger->dev, "%s: battery is okay but its voltage is low(~VPQLB)\n",
+ __func__);
+ break;
+ case MAX77705_BATTERY_DEAD:
+ dev_dbg(charger->dev, "%s: battery dead\n", __func__);
+ *value = POWER_SUPPLY_HEALTH_DEAD;
+ break;
+ case MAX77705_BATTERY_GOOD:
+ case MAX77705_BATTERY_LOWVOLTAGE:
+ *value = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ case MAX77705_BATTERY_OVERVOLTAGE:
+ dev_dbg(charger->dev, "%s: battery ovp\n", __func__);
+ *value = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+ default:
+ dev_dbg(charger->dev, "%s: battery unknown\n", __func__);
+ *value = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ }
+
+ return 0;
+}
+
+static int max77705_get_health(struct max77705_charger_data *charger, int *val)
+{
+ struct regmap *regmap = charger->regmap;
+ int ret, is_online = 0;
+
+ ret = max77705_get_online(regmap, &is_online);
+ if (ret)
+ return ret;
+ if (is_online) {
+ ret = max77705_get_vbus_state(regmap, val);
+ if (ret || (*val != POWER_SUPPLY_HEALTH_GOOD))
+ return ret;
+ }
+ return max77705_get_battery_health(charger, val);
+}
+
+static int max77705_get_input_current(struct max77705_charger_data *charger,
+ int *val)
+{
+ unsigned int reg_data;
+ int get_current = 0;
+ struct regmap *regmap = charger->regmap;
+
+ regmap_read(regmap,
+ MAX77705_CHG_REG_CNFG_09, ®_data);
+
+ reg_data &= MAX77705_CHG_CHGIN_LIM_MASK;
+
+ if (reg_data <= 3)
+ get_current = 100;
+ else if (reg_data >= MAX77705_CHG_CHGIN_LIM_MASK)
+ get_current = MAX77705_CURRENT_CHGIN_MAX;
+ else
+ get_current = (reg_data + 1) * 25;
+
+ *val = get_current;
+
+ return 0;
+}
+
+static int max77705_get_charge_current(struct max77705_charger_data *charger,
+ int *val)
+{
+ unsigned int reg_data;
+ struct regmap *regmap = charger->regmap;
+
+
+ regmap_read(regmap, MAX77705_CHG_REG_CNFG_02, ®_data);
+ reg_data &= MAX77705_CHG_CC;
+
+ *val = reg_data <= 0x2 ? 100 : reg_data * 50;
+
+ return 0;
+}
+
+static int max77705_set_float_voltage(struct max77705_charger_data *charger,
+ int float_voltage)
+{
+ int float_voltage_mv;
+ unsigned int reg_data = 0;
+ struct regmap *regmap = charger->regmap;
+
+ float_voltage_mv = float_voltage / 1000;
+ reg_data = float_voltage_mv <= 4000 ? 0x0 :
+ float_voltage_mv >= 4500 ? 0x23 :
+ (float_voltage_mv <= 4200) ? (float_voltage_mv - 4000) / 50 :
+ (((float_voltage_mv - 4200) / 10) + 0x04);
+
+ return regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_04,
+ MAX77705_CHG_CV_PRM_MASK,
+ (reg_data << MAX77705_CHG_CV_PRM_SHIFT));
+}
+
+static int max77705_get_float_voltage(struct max77705_charger_data *charger,
+ int *val)
+{
+ unsigned int reg_data = 0;
+ struct regmap *regmap = charger->regmap;
+
+ regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, ®_data);
+ reg_data &= MAX77705_CHG_PRM_MASK;
+ *val = reg_data <= 0x04 ? reg_data * 50 + 4000 :
+ (reg_data - 4) * 10 + 4200;
+
+ return 0;
+}
+
+static int max77705_chg_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct max77705_charger_data *charger = power_supply_get_drvdata(psy);
+ struct regmap *regmap = charger->regmap;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ return max77705_get_online(regmap, &val->intval);
+ case POWER_SUPPLY_PROP_PRESENT:
+ return max77705_check_battery(charger, &val->intval);
+ case POWER_SUPPLY_PROP_STATUS:
+ return max77705_get_status(charger, &val->intval);
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ return max77705_get_charge_type(charger, &val->intval);
+ case POWER_SUPPLY_PROP_HEALTH:
+ return max77705_get_health(charger, &val->intval);
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return max77705_get_input_current(charger, &val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return max77705_get_charge_current(charger, &val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return max77705_get_float_voltage(charger, &val->intval);
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = charger->bat_info->voltage_max_design_uv;
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = max77705_charger_model;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = max77705_charger_manufacturer;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const struct power_supply_desc max77705_charger_psy_desc = {
+ .name = "max77705-charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = max77705_charger_props,
+ .num_properties = ARRAY_SIZE(max77705_charger_props),
+ .get_property = max77705_chg_get_property,
+};
+
+static void max77705_chgin_isr_work(struct work_struct *work)
+{
+ struct max77705_charger_data *charger =
+ container_of(work, struct max77705_charger_data, chgin_work);
+ power_supply_changed(charger->psy_chg);
+}
+
+static void max77705_charger_initialize(struct max77705_charger_data *chg)
+{
+ u8 reg_data;
+ struct power_supply_battery_info *info;
+ struct regmap *regmap = chg->regmap;
+
+ if (power_supply_get_battery_info(chg->psy_chg, &info) < 0)
+ return;
+
+ chg->bat_info = info;
+
+ /* unlock charger setting protect */
+ /* slowest LX slope */
+ reg_data = MAX77705_CHGPROT_MASK | MAX77705_SLOWEST_LX_SLOPE;
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06, reg_data,
+ reg_data);
+
+ /* fast charge timer disable */
+ /* restart threshold disable */
+ /* pre-qual charge disable */
+ reg_data = (MAX77705_FCHGTIME_DISABLE << MAX77705_FCHGTIME_SHIFT) |
+ (MAX77705_CHG_RSTRT_DISABLE << MAX77705_CHG_RSTRT_SHIFT) |
+ (MAX77705_CHG_PQEN_DISABLE << MAX77705_PQEN_SHIFT);
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_01,
+ (MAX77705_FCHGTIME_MASK |
+ MAX77705_CHG_RSTRT_MASK |
+ MAX77705_PQEN_MASK),
+ reg_data);
+
+ /* OTG off(UNO on), boost off */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+ MAX77705_OTG_CTRL, 0);
+
+ /* charge current 450mA(default) */
+ /* otg current limit 900mA */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02,
+ MAX77705_OTG_ILIM_MASK,
+ MAX77705_OTG_ILIM_900 << MAX77705_OTG_ILIM_SHIFT);
+
+ /* BAT to SYS OCP 4.80A */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_05,
+ MAX77705_REG_B2SOVRC_MASK,
+ MAX77705_B2SOVRC_4_8A << MAX77705_REG_B2SOVRC_SHIFT);
+ /* top off current 150mA */
+ /* top off timer 30min */
+ reg_data = (MAX77705_TO_ITH_150MA << MAX77705_TO_ITH_SHIFT) |
+ (MAX77705_TO_TIME_30M << MAX77705_TO_TIME_SHIFT) |
+ (MAX77705_SYS_TRACK_DISABLE << MAX77705_SYS_TRACK_DIS_SHIFT);
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_03,
+ (MAX77705_TO_ITH_MASK |
+ MAX77705_TO_TIME_MASK |
+ MAX77705_SYS_TRACK_DIS_MASK), reg_data);
+
+ /* cv voltage 4.2V or 4.35V */
+ /* MINVSYS 3.6V(default) */
+ if (info->voltage_max_design_uv < 0) {
+ dev_warn(chg->dev, "missing battery:voltage-max-design-microvolt\n");
+ max77705_set_float_voltage(chg, 4200000);
+ } else {
+ max77705_set_float_voltage(chg, info->voltage_max_design_uv);
+ }
+
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
+ MAX77705_VCHGIN_REG_MASK, MAX77705_VCHGIN_4_5);
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
+ MAX77705_WCIN_REG_MASK, MAX77705_WCIN_4_5);
+
+ /* Watchdog timer */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+ MAX77705_WDTEN_MASK, 0);
+
+ /* Active Discharge Enable */
+ regmap_update_bits(regmap, MAX77705_PMIC_REG_MAINCTRL1, 1, 1);
+
+ /* VBYPSET=5.0V */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_11, MAX77705_VBYPSET_MASK, 0);
+
+ /* Switching Frequency : 1.5MHz */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_08, MAX77705_REG_FSW_MASK,
+ (MAX77705_CHG_FSW_1_5MHz << MAX77705_REG_FSW_SHIFT));
+
+ /* Auto skip mode */
+ regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12, MAX77705_REG_DISKIP_MASK,
+ (MAX77705_AUTO_SKIP << MAX77705_REG_DISKIP_SHIFT));
+}
+
+static int max77705_charger_probe(struct platform_device *pdev)
+{
+ struct power_supply_config pscfg = {};
+ struct i2c_client *i2c_chg;
+ struct max77693_dev *max77705;
+ struct max77705_charger_data *chg;
+ struct device *dev, *parent;
+ struct regmap_irq_chip_data *irq_data;
+ int ret;
+
+ dev = &pdev->dev;
+ parent = dev->parent;
+ max77705 = dev_get_drvdata(parent);
+
+ chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
+ if (!chg)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, chg);
+
+ i2c_chg = devm_i2c_new_dummy_device(max77705->dev, max77705->i2c->adapter, I2C_ADDR_CHG);
+
+ if (IS_ERR(i2c_chg))
+ return PTR_ERR(i2c_chg);
+
+ chg->regmap = devm_regmap_init_i2c(i2c_chg, &max77705_chg_regmap_config);
+
+ if (IS_ERR(chg->regmap))
+ return PTR_ERR(chg->regmap);
+
+ chg->dev = dev;
+ max77705_charger_irq_chip.irq_drv_data = chg;
+ ret = devm_regmap_add_irq_chip(chg->dev, chg->regmap, max77705->irq,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
+ &max77705_charger_irq_chip,
+ &irq_data);
+ if (ret) {
+ dev_err(dev, "failed to add irq chip: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(chg->regmap,
+ MAX77705_CHG_REG_INT_MASK,
+ MAX77705_CHGIN_IM, 0);
+
+ if (ret)
+ return ret;
+
+ chg->wqueue = create_singlethread_workqueue(dev_name(dev));
+ if (IS_ERR(chg->wqueue)) {
+ dev_err(dev, "failed to create workqueue\n");
+ return PTR_ERR(chg->wqueue);
+ }
+ INIT_WORK(&chg->chgin_work, max77705_chgin_isr_work);
+
+ pscfg.of_node = dev->of_node;
+ pscfg.drv_data = chg;
+
+ chg->psy_chg = devm_power_supply_register(dev, &max77705_charger_psy_desc, &pscfg);
+ if (IS_ERR(chg->psy_chg))
+ return PTR_ERR(chg->psy_chg);
+
+ max77705_charger_initialize(chg);
+
+ return max77705_charger_enable(chg);
+}
+
+static void max77705_charger_remove(struct platform_device *pdev)
+{
+ struct max77705_charger_data *chg = platform_get_drvdata(pdev);
+
+ max77705_charger_disable(chg);
+}
+
+static const struct of_device_id max77705_charger_of_match[] = {
+ { .compatible = "maxim,max77705-charger" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max77705_charger_of_match);
+
+static struct platform_driver max77705_charger_driver = {
+ .driver = {
+ .name = "max77705-charger",
+ .of_match_table = max77705_charger_of_match,
+ },
+ .probe = max77705_charger_probe,
+ .remove = max77705_charger_remove,
+};
+module_platform_driver(max77705_charger_driver);
+
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_DESCRIPTION("Maxim MAX77705 charger driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/power/max77705_charger.h b/include/linux/power/max77705_charger.h
new file mode 100644
index 000000000000..44ecd6b32cbe
--- /dev/null
+++ b/include/linux/power/max77705_charger.h
@@ -0,0 +1,216 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Maxim MAX77705 definitions.
+ *
+ * Copyright (C) 2015 Samsung Electronics, Inc.
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#ifndef __MAX77705_CHARGER_H
+#define __MAX77705_CHARGER_H __FILE__
+
+/* MAX77705_CHG_REG_CHG_INT */
+#define MAX77705_BYP_I BIT(0)
+#define MAX77705_INP_LIMIT_I BIT(1)
+#define MAX77705_BATP_I BIT(2)
+#define MAX77705_BAT_I BIT(3)
+#define MAX77705_CHG_I BIT(4)
+#define MAX77705_WCIN_I BIT(5)
+#define MAX77705_CHGIN_I BIT(6)
+#define MAX77705_AICL_I BIT(7)
+
+/* MAX77705_CHG_REG_CHG_INT_MASK */
+#define MAX77705_BYP_IM BIT(0)
+#define MAX77705_INP_LIMIT_IM BIT(1)
+#define MAX77705_BATP_IM BIT(2)
+#define MAX77705_BAT_IM BIT(3)
+#define MAX77705_CHG_IM BIT(4)
+#define MAX77705_WCIN_IM BIT(5)
+#define MAX77705_CHGIN_IM BIT(6)
+#define MAX77705_AICL_IM BIT(7)
+
+/* MAX77705_CHG_REG_CHG_INT_OK */
+#define MAX77705_BYP_OK BIT(0)
+#define MAX77705_DISQBAT_OK BIT(1)
+#define MAX77705_BATP_OK BIT(2)
+#define MAX77705_BAT_OK BIT(3)
+#define MAX77705_CHG_OK BIT(4)
+#define MAX77705_WCIN_OK BIT(5)
+#define MAX77705_CHGIN_OK BIT(6)
+#define MAX77705_AICL_OK BIT(7)
+
+/* MAX77705_CHG_REG_DETAILS_00 */
+#define MAX77705_BATP_DTLS BIT(0)
+#define MAX77705_WCIN_DTLS GENMASK(4, 3)
+#define MAX77705_WCIN_DTLS_SHIFT 3
+#define MAX77705_CHGIN_DTLS GENMASK(6, 5)
+#define MAX77705_CHGIN_DTLS_SHIFT 5
+
+/* MAX77705_CHG_REG_DETAILS_01 */
+#define MAX77705_CHG_DTLS GENMASK(3, 0)
+#define MAX77705_CHG_DTLS_SHIFT 0
+#define MAX77705_BAT_DTLS GENMASK(6, 4)
+#define MAX77705_BAT_DTLS_SHIFT 4
+
+/* MAX77705_CHG_REG_DETAILS_02 */
+#define MAX77705_BYP_DTLS GENMASK(3, 0)
+#define MAX77705_BYP_DTLS_SHIFT 0
+
+/* MAX77705_CHG_REG_CNFG_00 */
+#define MAX77705_CHG_SHIFT 0
+#define MAX77705_UNO_SHIFT 1
+#define MAX77705_OTG_SHIFT 1
+#define MAX77705_BUCK_SHIFT 2
+#define MAX77705_BOOST_SHIFT 3
+#define MAX77705_WDTEN_SHIFT 4
+#define MAX77705_MODE_MASK GENMASK(3, 0)
+#define MAX77705_CHG_MASK BIT(MAX77705_CHG_SHIFT)
+#define MAX77705_UNO_MASK BIT(MAX77705_UNO_SHIFT)
+#define MAX77705_OTG_MASK BIT(MAX77705_OTG_SHIFT)
+#define MAX77705_BUCK_MASK BIT(MAX77705_BUCK_SHIFT)
+#define MAX77705_BOOST_MASK BIT(MAX77705_BOOST_SHIFT)
+#define MAX77705_WDTEN_MASK BIT(MAX77705_WDTEN_SHIFT)
+#define MAX77705_UNO_CTRL (MAX77705_UNO_MASK | MAX77705_BOOST_MASK)
+#define MAX77705_OTG_CTRL (MAX77705_OTG_MASK | MAX77705_BOOST_MASK)
+
+/* MAX77705_CHG_REG_CNFG_01 */
+#define MAX77705_FCHGTIME_SHIFT 0
+#define MAX77705_FCHGTIME_MASK GENMASK(2, 0)
+#define MAX77705_CHG_RSTRT_SHIFT 4
+#define MAX77705_CHG_RSTRT_MASK GENMASK(5, 4)
+#define MAX77705_FCHGTIME_DISABLE 0
+#define MAX77705_CHG_RSTRT_DISABLE 0x3
+
+#define MAX77705_PQEN_SHIFT 7
+#define MAX77705_PQEN_MASK BIT(7)
+#define MAX77705_CHG_PQEN_DISABLE 0
+#define MAX77705_CHG_PQEN_ENABLE 1
+
+/* MAX77705_CHG_REG_CNFG_02 */
+#define MAX77705_OTG_ILIM_SHIFT 6
+#define MAX77705_OTG_ILIM_MASK GENMASK(7, 6)
+#define MAX77705_OTG_ILIM_500 0
+#define MAX77705_OTG_ILIM_900 1
+#define MAX77705_OTG_ILIM_1200 2
+#define MAX77705_OTG_ILIM_1500 3
+#define MAX77705_CHG_CC GENMASK(5, 0)
+
+/* MAX77705_CHG_REG_CNFG_03 */
+#define MAX77705_TO_ITH_SHIFT 0
+#define MAX77705_TO_ITH_MASK GENMASK(2, 0)
+#define MAX77705_TO_TIME_SHIFT 3
+#define MAX77705_TO_TIME_MASK GENMASK(5, 3)
+#define MAX77705_SYS_TRACK_DIS_SHIFT 7
+#define MAX77705_SYS_TRACK_DIS_MASK BIT(7)
+#define MAX77705_TO_ITH_150MA 0
+#define MAX77705_TO_TIME_30M 3
+#define MAX77705_SYS_TRACK_ENABLE 0
+#define MAX77705_SYS_TRACK_DISABLE 1
+
+/* MAX77705_CHG_REG_CNFG_04 */
+#define MAX77705_CHG_MINVSYS_SHIFT 6
+#define MAX77705_CHG_MINVSYS_MASK GENMASK(7, 6)
+#define MAX77705_CHG_PRM_SHIFT 0
+#define MAX77705_CHG_PRM_MASK GENMASK(5, 0)
+
+#define MAX77705_CHG_CV_PRM_SHIFT 0
+#define MAX77705_CHG_CV_PRM_MASK GENMASK(5, 0)
+
+/* MAX77705_CHG_REG_CNFG_05 */
+#define MAX77705_REG_B2SOVRC_SHIFT 0
+#define MAX77705_REG_B2SOVRC_MASK GENMASK(3, 0)
+#define MAX77705_B2SOVRC_DISABLE 0
+#define MAX77705_B2SOVRC_4_5A 6
+#define MAX77705_B2SOVRC_4_8A 8
+#define MAX77705_B2SOVRC_5_0A 9
+
+/* MAX77705_CHG_CNFG_06 */
+#define MAX77705_WDTCLR_SHIFT 0
+#define MAX77705_WDTCLR_MASK GENMASK(1, 0)
+#define MAX77705_WDTCLR 1
+#define MAX77705_CHGPROT_MASK GENMASK(3, 2)
+#define MAX77705_CHGPROT_UNLOCKED GENMASK(3, 2)
+#define MAX77705_SLOWEST_LX_SLOPE GENMASK(6, 5)
+
+/* MAX77705_CHG_REG_CNFG_07 */
+#define MAX77705_CHG_FMBST 4
+#define MAX77705_REG_FMBST_SHIFT 2
+#define MAX77705_REG_FMBST_MASK BIT(MAX77705_REG_FMBST_SHIFT)
+#define MAX77705_REG_FGSRC_SHIFT 1
+#define MAX77705_REG_FGSRC_MASK BIT(MAX77705_REG_FGSRC_SHIFT)
+
+/* MAX77705_CHG_REG_CNFG_08 */
+#define MAX77705_REG_FSW_SHIFT 0
+#define MAX77705_REG_FSW_MASK GENMASK(1, 0)
+#define MAX77705_CHG_FSW_3MHz 0
+#define MAX77705_CHG_FSW_2MHz 1
+#define MAX77705_CHG_FSW_1_5MHz 2
+
+/* MAX77705_CHG_REG_CNFG_09 */
+#define MAX77705_CHG_CHGIN_LIM_MASK GENMASK(6, 0)
+#define MAX77705_CHG_EN_MASK BIT(7)
+#define MAX77705_CHG_DISABLE 0
+#define MAX77705_CHARGER_CHG_CHARGING(_reg) \
+ (((_reg) & MAX77705_CHG_EN_MASK) > 1)
+
+
+/* MAX77705_CHG_REG_CNFG_10 */
+#define MAX77705_CHG_WCIN_LIM GENMASK(5, 0)
+
+/* MAX77705_CHG_REG_CNFG_11 */
+#define MAX77705_VBYPSET_SHIFT 0
+#define MAX77705_VBYPSET_MASK GENMASK(6, 0)
+
+/* MAX77705_CHG_REG_CNFG_12 */
+#define MAX77705_CHGINSEL_SHIFT 5
+#define MAX77705_CHGINSEL_MASK BIT(MAX77705_CHGINSEL_SHIFT)
+#define MAX77705_WCINSEL_SHIFT 6
+#define MAX77705_WCINSEL_MASK BIT(MAX77705_WCINSEL_SHIFT)
+#define MAX77705_VCHGIN_REG_MASK GENMASK(4, 3)
+#define MAX77705_WCIN_REG_MASK GENMASK(2, 1)
+#define MAX77705_REG_DISKIP_SHIFT 0
+#define MAX77705_REG_DISKIP_MASK BIT(MAX77705_REG_DISKIP_SHIFT)
+/* REG=4.5V, UVLO=4.7V */
+#define MAX77705_VCHGIN_4_5 0
+/* REG=4.5V, UVLO=4.7V */
+#define MAX77705_WCIN_4_5 0
+#define MAX77705_DISABLE_SKIP 1
+#define MAX77705_AUTO_SKIP 0
+
+/* mA */
+#define MAX77705_CURRENT_STEP 25
+#define MAX77705_CURRENT_WCIN_MAX 1600
+#define MAX77705_CURRENT_CHGIN_MAX 3200
+
+/* Convert current in mA to corresponding CNFG09 value */
+inline u8 max77705_convert_ma_to_chgin_ilim_value(unsigned int cur)
+{
+ if (cur < MAX77705_CURRENT_STEP)
+ return 0;
+ if (cur < MAX77705_CURRENT_CHGIN_MAX)
+ return (cur / MAX77705_CURRENT_STEP) - 1;
+ else
+ return (MAX77705_CURRENT_CHGIN_MAX / MAX77705_CURRENT_STEP) - 1;
+}
+
+/* Convert current in mA to corresponding CNFG10 value */
+inline u8 max77705_convert_ma_to_wcin_ilim_value(unsigned int cur)
+{
+ if (cur < MAX77705_CURRENT_STEP)
+ return 0;
+ if (cur < MAX77705_CURRENT_WCIN_MAX)
+ return (cur / MAX77705_CURRENT_STEP) - 1;
+ else
+ return (MAX77705_CURRENT_WCIN_MAX / MAX77705_CURRENT_STEP) - 1;
+}
+
+struct max77705_charger_data {
+ struct device *dev;
+ struct regmap *regmap;
+ struct power_supply_battery_info *bat_info;
+ struct workqueue_struct *wqueue;
+ struct work_struct chgin_work;
+ struct power_supply *psy_chg;
+};
+
+#endif /* __MAX77705_CHARGER_H */
--
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