--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2021 Samuel Holland <samuel@sholland.org>
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#define IP5XXX_SYS_CTL0 0x01
+#define IP5XXX_SYS_CTL0_WLED_DET_EN BIT(4)
+#define IP5XXX_SYS_CTL0_WLED_EN BIT(3)
+#define IP5XXX_SYS_CTL0_BOOST_EN BIT(2)
+#define IP5XXX_SYS_CTL0_CHARGER_EN BIT(1)
+#define IP5XXX_SYS_CTL1 0x02
+#define IP5XXX_SYS_CTL1_LIGHT_SHDN_EN BIT(1)
+#define IP5XXX_SYS_CTL1_LOAD_PWRUP_EN BIT(0)
+#define IP5XXX_SYS_CTL2 0x0c
+#define IP5XXX_SYS_CTL2_LIGHT_SHDN_TH GENMASK(7, 3)
+#define IP5XXX_SYS_CTL3 0x03
+#define IP5XXX_SYS_CTL3_LONG_PRESS_TIME_SEL GENMASK(7, 6)
+#define IP5XXX_SYS_CTL3_BTN_SHDN_EN BIT(5)
+#define IP5XXX_SYS_CTL4 0x04
+#define IP5XXX_SYS_CTL4_SHDN_TIME_SEL GENMASK(7, 6)
+#define IP5XXX_SYS_CTL4_VIN_PULLOUT_BOOST_EN BIT(5)
+#define IP5XXX_SYS_CTL5 0x07
+#define IP5XXX_SYS_CTL5_NTC_DIS BIT(6)
+#define IP5XXX_SYS_CTL5_WLED_MODE_SEL BIT(1)
+#define IP5XXX_SYS_CTL5_BTN_SHDN_SEL BIT(0)
+#define IP5XXX_CHG_CTL1 0x22
+#define IP5XXX_CHG_CTL1_BOOST_UVP_SEL GENMASK(3, 2)
+#define IP5XXX_CHG_CTL2 0x24
+#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL GENMASK(6, 5)
+#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_2V (0x0 << 5)
+#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_3V (0x1 << 5)
+#define IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_35V (0x2 << 5)
+#define IP5XXX_CHG_CTL2_CONST_VOLT_SEL GENMASK(2, 1)
+#define IP5XXX_CHG_CTL4 0x26
+#define IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN BIT(6)
+#define IP5XXX_CHG_CTL4A 0x25
+#define IP5XXX_CHG_CTL4A_CONST_CUR_SEL GENMASK(4, 0)
+#define IP5XXX_MFP_CTL0 0x51
+#define IP5XXX_MFP_CTL1 0x52
+#define IP5XXX_GPIO_CTL2 0x53
+#define IP5XXX_GPIO_CTL2A 0x54
+#define IP5XXX_GPIO_CTL3 0x55
+#define IP5XXX_READ0 0x71
+#define IP5XXX_READ0_CHG_STAT GENMASK(7, 5)
+#define IP5XXX_READ0_CHG_STAT_IDLE (0x0 << 5)
+#define IP5XXX_READ0_CHG_STAT_TRICKLE (0x1 << 5)
+#define IP5XXX_READ0_CHG_STAT_CONST_VOLT (0x2 << 5)
+#define IP5XXX_READ0_CHG_STAT_CONST_CUR (0x3 << 5)
+#define IP5XXX_READ0_CHG_STAT_CONST_VOLT_STOP (0x4 << 5)
+#define IP5XXX_READ0_CHG_STAT_FULL (0x5 << 5)
+#define IP5XXX_READ0_CHG_STAT_TIMEOUT (0x6 << 5)
+#define IP5XXX_READ0_CHG_OP BIT(4)
+#define IP5XXX_READ0_CHG_END BIT(3)
+#define IP5XXX_READ0_CONST_VOLT_TIMEOUT BIT(2)
+#define IP5XXX_READ0_CHG_TIMEOUT BIT(1)
+#define IP5XXX_READ0_TRICKLE_TIMEOUT BIT(0)
+#define IP5XXX_READ0_TIMEOUT GENMASK(2, 0)
+#define IP5XXX_READ1 0x72
+#define IP5XXX_READ1_WLED_PRESENT BIT(7)
+#define IP5XXX_READ1_LIGHT_LOAD BIT(6)
+#define IP5XXX_READ1_VIN_OVERVOLT BIT(5)
+#define IP5XXX_READ2 0x77
+#define IP5XXX_READ2_BTN_PRESS BIT(3)
+#define IP5XXX_READ2_BTN_LONG_PRESS BIT(1)
+#define IP5XXX_READ2_BTN_SHORT_PRESS BIT(0)
+#define IP5XXX_BATVADC_DAT0 0xa2
+#define IP5XXX_BATVADC_DAT1 0xa3
+#define IP5XXX_BATIADC_DAT0 0xa4
+#define IP5XXX_BATIADC_DAT1 0xa5
+#define IP5XXX_BATOCV_DAT0 0xa8
+#define IP5XXX_BATOCV_DAT1 0xa9
+
+struct ip5xxx {
+ struct regmap *regmap;
+ bool initialized;
+};
+
+/*
+ * The IP5xxx charger only responds on I2C when it is "awake". The charger is
+ * generally only awake when VIN is powered or when its boost converter is
+ * enabled. Going into shutdown resets all register values. To handle this:
+ * 1) When any bus error occurs, assume the charger has gone into shutdown.
+ * 2) Attempt the initialization sequence on each subsequent register access
+ * until it succeeds.
+ */
+static int ip5xxx_read(struct ip5xxx *ip5xxx, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+
+ ret = regmap_read(ip5xxx->regmap, reg, val);
+ if (ret)
+ ip5xxx->initialized = false;
+
+ return ret;
+}
+
+static int ip5xxx_update_bits(struct ip5xxx *ip5xxx, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+
+ ret = regmap_update_bits(ip5xxx->regmap, reg, mask, val);
+ if (ret)
+ ip5xxx->initialized = false;
+
+ return ret;
+}
+
+static int ip5xxx_initialize(struct power_supply *psy)
+{
+ struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
+ int ret;
+
+ if (ip5xxx->initialized)
+ return 0;
+
+ /*
+ * Disable shutdown under light load.
+ * Enable power on when under load.
+ */
+ ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL1,
+ IP5XXX_SYS_CTL1_LIGHT_SHDN_EN |
+ IP5XXX_SYS_CTL1_LOAD_PWRUP_EN,
+ IP5XXX_SYS_CTL1_LOAD_PWRUP_EN);
+ if (ret)
+ return ret;
+
+ /*
+ * Enable shutdown after a long button press (as configured below).
+ */
+ ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL3,
+ IP5XXX_SYS_CTL3_BTN_SHDN_EN,
+ IP5XXX_SYS_CTL3_BTN_SHDN_EN);
+ if (ret)
+ return ret;
+
+ /*
+ * Power on automatically when VIN is removed.
+ */
+ ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL4,
+ IP5XXX_SYS_CTL4_VIN_PULLOUT_BOOST_EN,
+ IP5XXX_SYS_CTL4_VIN_PULLOUT_BOOST_EN);
+ if (ret)
+ return ret;
+
+ /*
+ * Enable the NTC.
+ * Configure the button for two presses => LED, long press => shutdown.
+ */
+ ret = ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL5,
+ IP5XXX_SYS_CTL5_NTC_DIS |
+ IP5XXX_SYS_CTL5_WLED_MODE_SEL |
+ IP5XXX_SYS_CTL5_BTN_SHDN_SEL,
+ IP5XXX_SYS_CTL5_WLED_MODE_SEL |
+ IP5XXX_SYS_CTL5_BTN_SHDN_SEL);
+ if (ret)
+ return ret;
+
+ ip5xxx->initialized = true;
+ dev_dbg(psy->dev.parent, "Initialized after power on\n");
+
+ return 0;
+}
+
+static const enum power_supply_property ip5xxx_battery_properties[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_OCV,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+};
+
+static int ip5xxx_battery_get_status(struct ip5xxx *ip5xxx, int *val)
+{
+ unsigned int rval;
+ int ret;
+
+ ret = ip5xxx_read(ip5xxx, IP5XXX_READ0, &rval);
+ if (ret)
+ return ret;
+
+ switch (rval & IP5XXX_READ0_CHG_STAT) {
+ case IP5XXX_READ0_CHG_STAT_IDLE:
+ *val = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case IP5XXX_READ0_CHG_STAT_TRICKLE:
+ case IP5XXX_READ0_CHG_STAT_CONST_CUR:
+ case IP5XXX_READ0_CHG_STAT_CONST_VOLT:
+ *val = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case IP5XXX_READ0_CHG_STAT_CONST_VOLT_STOP:
+ case IP5XXX_READ0_CHG_STAT_FULL:
+ *val = POWER_SUPPLY_STATUS_FULL;
+ break;
+ case IP5XXX_READ0_CHG_STAT_TIMEOUT:
+ *val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ip5xxx_battery_get_charge_type(struct ip5xxx *ip5xxx, int *val)
+{
+ unsigned int rval;
+ int ret;
+
+ ret = ip5xxx_read(ip5xxx, IP5XXX_READ0, &rval);
+ if (ret)
+ return ret;
+
+ switch (rval & IP5XXX_READ0_CHG_STAT) {
+ case IP5XXX_READ0_CHG_STAT_IDLE:
+ case IP5XXX_READ0_CHG_STAT_CONST_VOLT_STOP:
+ case IP5XXX_READ0_CHG_STAT_FULL:
+ case IP5XXX_READ0_CHG_STAT_TIMEOUT:
+ *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ case IP5XXX_READ0_CHG_STAT_TRICKLE:
+ *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ case IP5XXX_READ0_CHG_STAT_CONST_CUR:
+ case IP5XXX_READ0_CHG_STAT_CONST_VOLT:
+ *val = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ip5xxx_battery_get_health(struct ip5xxx *ip5xxx, int *val)
+{
+ unsigned int rval;
+ int ret;
+
+ ret = ip5xxx_read(ip5xxx, IP5XXX_READ0, &rval);
+ if (ret)
+ return ret;
+
+ if (rval & IP5XXX_READ0_TIMEOUT)
+ *val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ else
+ *val = POWER_SUPPLY_HEALTH_GOOD;
+
+ return 0;
+}
+
+static int ip5xxx_battery_get_voltage_max(struct ip5xxx *ip5xxx, int *val)
+{
+ unsigned int rval;
+ int ret;
+
+ ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL2, &rval);
+ if (ret)
+ return ret;
+
+ /*
+ * It is not clear what this will return if
+ * IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN is not set...
+ */
+ switch (rval & IP5XXX_CHG_CTL2_BAT_TYPE_SEL) {
+ case IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_2V:
+ *val = 4200000;
+ break;
+ case IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_3V:
+ *val = 4300000;
+ break;
+ case IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_35V:
+ *val = 4350000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ip5xxx_battery_read_adc(struct ip5xxx *ip5xxx,
+ u8 lo_reg, u8 hi_reg, int *val)
+{
+ unsigned int hi, lo;
+ int ret;
+
+ ret = ip5xxx_read(ip5xxx, lo_reg, &lo);
+ if (ret)
+ return ret;
+
+ ret = ip5xxx_read(ip5xxx, hi_reg, &hi);
+ if (ret)
+ return ret;
+
+ *val = sign_extend32(hi << 8 | lo, 13);
+
+ return 0;
+}
+
+static int ip5xxx_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
+ int raw, ret, vmax;
+ unsigned int rval;
+
+ ret = ip5xxx_initialize(psy);
+ if (ret)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ return ip5xxx_battery_get_status(ip5xxx, &val->intval);
+
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ return ip5xxx_battery_get_charge_type(ip5xxx, &val->intval);
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ return ip5xxx_battery_get_health(ip5xxx, &val->intval);
+
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ return ip5xxx_battery_get_voltage_max(ip5xxx, &val->intval);
+
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATVADC_DAT0,
+ IP5XXX_BATVADC_DAT1, &raw);
+
+ val->intval = 2600000 + DIV_ROUND_CLOSEST(raw * 26855, 100);
+ return 0;
+
+ case POWER_SUPPLY_PROP_VOLTAGE_OCV:
+ ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATOCV_DAT0,
+ IP5XXX_BATOCV_DAT1, &raw);
+
+ val->intval = 2600000 + DIV_ROUND_CLOSEST(raw * 26855, 100);
+ return 0;
+
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = ip5xxx_battery_read_adc(ip5xxx, IP5XXX_BATIADC_DAT0,
+ IP5XXX_BATIADC_DAT1, &raw);
+
+ val->intval = DIV_ROUND_CLOSEST(raw * 745985, 1000);
+ return 0;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL4A, &rval);
+ if (ret)
+ return ret;
+
+ rval &= IP5XXX_CHG_CTL4A_CONST_CUR_SEL;
+ val->intval = 100000 * rval;
+ return 0;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = 100000 * 0x1f;
+ return 0;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax);
+ if (ret)
+ return ret;
+
+ ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL2, &rval);
+ if (ret)
+ return ret;
+
+ rval &= IP5XXX_CHG_CTL2_CONST_VOLT_SEL;
+ val->intval = vmax + 14000 * (rval >> 1);
+ return 0;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax);
+ if (ret)
+ return ret;
+
+ val->intval = vmax + 14000 * 3;
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ip5xxx_battery_set_voltage_max(struct ip5xxx *ip5xxx, int val)
+{
+ unsigned int rval;
+ int ret;
+
+ switch (val) {
+ case 4200000:
+ rval = IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_2V;
+ break;
+ case 4300000:
+ rval = IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_3V;
+ break;
+ case 4350000:
+ rval = IP5XXX_CHG_CTL2_BAT_TYPE_SEL_4_35V;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL2,
+ IP5XXX_CHG_CTL2_BAT_TYPE_SEL, rval);
+ if (ret)
+ return ret;
+
+ ret = ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL4,
+ IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN,
+ IP5XXX_CHG_CTL4_BAT_TYPE_SEL_EN);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ip5xxx_battery_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
+ unsigned int rval;
+ int ret, vmax;
+
+ ret = ip5xxx_initialize(psy);
+ if (ret)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ switch (val->intval) {
+ case POWER_SUPPLY_STATUS_CHARGING:
+ rval = IP5XXX_SYS_CTL0_CHARGER_EN;
+ break;
+ case POWER_SUPPLY_STATUS_DISCHARGING:
+ case POWER_SUPPLY_STATUS_NOT_CHARGING:
+ rval = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL0,
+ IP5XXX_SYS_CTL0_CHARGER_EN, rval);
+
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ return ip5xxx_battery_set_voltage_max(ip5xxx, val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ rval = val->intval / 100000;
+ return ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL4A,
+ IP5XXX_CHG_CTL4A_CONST_CUR_SEL, rval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ ret = ip5xxx_battery_get_voltage_max(ip5xxx, &vmax);
+ if (ret)
+ return ret;
+
+ rval = ((val->intval - vmax) / 14000) << 1;
+ return ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL2,
+ IP5XXX_CHG_CTL2_CONST_VOLT_SEL, rval);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ip5xxx_battery_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ return psp == POWER_SUPPLY_PROP_STATUS ||
+ psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN ||
+ psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT ||
+ psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE;
+}
+
+static const struct power_supply_desc ip5xxx_battery_desc = {
+ .name = "ip5xxx-battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = ip5xxx_battery_properties,
+ .num_properties = ARRAY_SIZE(ip5xxx_battery_properties),
+ .get_property = ip5xxx_battery_get_property,
+ .set_property = ip5xxx_battery_set_property,
+ .property_is_writeable = ip5xxx_battery_property_is_writeable,
+};
+
+static const enum power_supply_property ip5xxx_boost_properties[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+};
+
+static int ip5xxx_boost_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
+ unsigned int rval;
+ int ret;
+
+ ret = ip5xxx_initialize(psy);
+ if (ret)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = ip5xxx_read(ip5xxx, IP5XXX_SYS_CTL0, &rval);
+ if (ret)
+ return ret;
+
+ val->intval = !!(rval & IP5XXX_SYS_CTL0_BOOST_EN);
+ return 0;
+
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ ret = ip5xxx_read(ip5xxx, IP5XXX_CHG_CTL1, &rval);
+ if (ret)
+ return ret;
+
+ rval &= IP5XXX_CHG_CTL1_BOOST_UVP_SEL;
+ val->intval = 4530000 + 100000 * (rval >> 2);
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ip5xxx_boost_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct ip5xxx *ip5xxx = power_supply_get_drvdata(psy);
+ unsigned int rval;
+ int ret;
+
+ ret = ip5xxx_initialize(psy);
+ if (ret)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ rval = val->intval ? IP5XXX_SYS_CTL0_BOOST_EN : 0;
+ return ip5xxx_update_bits(ip5xxx, IP5XXX_SYS_CTL0,
+ IP5XXX_SYS_CTL0_BOOST_EN, rval);
+
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ rval = ((val->intval - 4530000) / 100000) << 2;
+ return ip5xxx_update_bits(ip5xxx, IP5XXX_CHG_CTL1,
+ IP5XXX_CHG_CTL1_BOOST_UVP_SEL, rval);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ip5xxx_boost_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ return true;
+}
+
+static const struct power_supply_desc ip5xxx_boost_desc = {
+ .name = "ip5xxx-boost",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = ip5xxx_boost_properties,
+ .num_properties = ARRAY_SIZE(ip5xxx_boost_properties),
+ .get_property = ip5xxx_boost_get_property,
+ .set_property = ip5xxx_boost_set_property,
+ .property_is_writeable = ip5xxx_boost_property_is_writeable,
+};
+
+static const struct regmap_config ip5xxx_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = IP5XXX_BATOCV_DAT1,
+};
+
+static int ip5xxx_power_probe(struct i2c_client *client)
+{
+ struct power_supply_config psy_cfg = {};
+ struct device *dev = &client->dev;
+ struct power_supply *psy;
+ struct ip5xxx *ip5xxx;
+
+ ip5xxx = devm_kzalloc(dev, sizeof(*ip5xxx), GFP_KERNEL);
+ if (!ip5xxx)
+ return -ENOMEM;
+
+ ip5xxx->regmap = devm_regmap_init_i2c(client, &ip5xxx_regmap_config);
+ if (IS_ERR(ip5xxx->regmap))
+ return PTR_ERR(ip5xxx->regmap);
+
+ psy_cfg.of_node = dev->of_node;
+ psy_cfg.drv_data = ip5xxx;
+
+ psy = devm_power_supply_register(dev, &ip5xxx_battery_desc, &psy_cfg);
+ if (IS_ERR(psy))
+ return PTR_ERR(psy);
+
+ psy = devm_power_supply_register(dev, &ip5xxx_boost_desc, &psy_cfg);
+ if (IS_ERR(psy))
+ return PTR_ERR(psy);
+
+ return 0;
+}
+
+static const struct of_device_id ip5xxx_power_of_match[] = {
+ { .compatible = "injoinic,ip5108" },
+ { .compatible = "injoinic,ip5109" },
+ { .compatible = "injoinic,ip5207" },
+ { .compatible = "injoinic,ip5209" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ip5xxx_power_of_match);
+
+static struct i2c_driver ip5xxx_power_driver = {
+ .probe_new = ip5xxx_power_probe,
+ .driver = {
+ .name = "ip5xxx-power",
+ .of_match_table = ip5xxx_power_of_match,
+ }
+};
+module_i2c_driver(ip5xxx_power_driver);
+
+MODULE_AUTHOR("Samuel Holland <samuel@sholland.org>");
+MODULE_DESCRIPTION("Injoinic IP5xxx power bank IC driver");
+MODULE_LICENSE("GPL");
projects / platform / kernel / linux-rpi.git / commitdiff