@@ -1,9 +1,14 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Driver for Analog Devices (Linear Technology) LTC4162-L charger IC.
+ * Driver for Analog Devices (Linear Technology)
+ * LTC4162-L 35V/3.2A Multi-Cell Lithium-Ion Step-Down Battery Charger
+ * LTC4162-F 35V/3.2A Multi-Cell LiFePO4 Step-Down Battery Charger
+ * LTC4162-S 35V/3.2A Lead-Acid Step-Down Battery Charger
+ * LTC4015 35V/3.2A Multichemistry Buck Battery Charger Controller
* Copyright (C) 2020, Topic Embedded Products
*/
+#include <linux/bitfield.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/of.h>
@@ -47,6 +52,20 @@
#define LTC4162L_VBAT_FILT 0x47
#define LTC4162L_INPUT_UNDERVOLTAGE_DAC 0x4B
+#define LTC4162L_CHEM_MASK GENMASK(11, 8)
+
+enum ltc4162_chem {
+ ltc4162_lad,
+ ltc4162_l42,
+ ltc4162_l41,
+ ltc4162_l40,
+ ltc4162_fad,
+ ltc4162_ffs,
+ ltc4162_fst,
+ ltc4162_sst = 8,
+ ltc4162_sad,
+};
+
/* Enumeration as in datasheet. Individual bits are mutually exclusive. */
enum ltc4162l_state {
battery_detection = 2048,
@@ -75,10 +94,28 @@ enum ltc4162l_charge_status {
/* Magic number to write to ARM_SHIP_MODE register */
#define LTC4162L_ARM_SHIP_MODE_MAGIC 21325
+struct ltc4162l_info;
+
+struct ltc4162l_chip_info {
+ const char *name;
+ int (*get_vbat)(struct ltc4162l_info *info, unsigned int reg,
+ union power_supply_propval *val);
+ int (*get_vcharge)(struct ltc4162l_info *info, unsigned int reg,
+ union power_supply_propval *val);
+ int (*set_vcharge)(struct ltc4162l_info *info, unsigned int reg,
+ unsigned int value);
+ int (*get_die_temp)(struct ltc4162l_info *info,
+ union power_supply_propval *val);
+ unsigned int ibat_resolution_uv;
+ unsigned int vin_resolution_mv;
+ u8 telemetry_mask;
+};
+
struct ltc4162l_info {
struct i2c_client *client;
struct regmap *regmap;
struct power_supply *charger;
+ const struct ltc4162l_chip_info *chip_info;
u32 rsnsb; /* Series resistor that sets charge current, microOhm */
u32 rsnsi; /* Series resistor to measure input current, microOhm */
u8 cell_count; /* Number of connected cells, 0 while unknown */
@@ -108,6 +145,18 @@ static u8 ltc4162l_get_cell_count(struct ltc4162l_info *info)
return val;
};
+static u8 ltc4162l_get_chem_type(struct ltc4162l_info *info)
+{
+ int ret;
+ unsigned int val;
+
+ ret = regmap_read(info->regmap, LTC4162L_CHEM_CELLS_REG, &val);
+ if (ret)
+ return ret;
+
+ return FIELD_GET(LTC4162L_CHEM_MASK, val);
+};
+
/* Convert enum value to POWER_SUPPLY_STATUS value */
static int ltc4162l_state_decode(enum ltc4162l_state value)
{
@@ -223,25 +272,83 @@ static int ltc4162l_get_vbat(struct ltc4162l_info *info,
unsigned int reg,
union power_supply_propval *val)
{
- unsigned int regval;
+ unsigned int regval, chem_type;
int ret;
ret = regmap_read(info->regmap, reg, ®val);
if (ret)
return ret;
- /* cell_count × 192.4μV/LSB */
- regval *= 1924;
- regval *= ltc4162l_get_cell_count(info);
- regval /= 10;
- val->intval = regval;
+ /*
+ * cell_count × scaling factor
+ * For ltc4162-s, it uses a cell_count value of 2 for each group of 3
+ * physical (2V) cells, thus will return 2, 4, 6, 8 for 6V, 12V, 18V,
+ * and 24V respectively, and has to divide by 2 to multiply the scale
+ * factor by 1, 2, 3, or 4 to represent a 6V, 12V, 18V, or 24V battery
+ * respectively.
+ */
+ chem_type = ltc4162l_get_chem_type(info);
+ switch (chem_type) {
+ case ltc4162_lad ... ltc4162_fst:
+ regval *= 1924;
+ regval *= ltc4162l_get_cell_count(info);
+ regval /= 10;
+ val->intval = regval;
- return 0;
+ return 0;
+ case ltc4162_sst ... ltc4162_sad:
+ regval *= 3848;
+ regval *= ltc4162l_get_cell_count(info) / 2;
+ regval /= 10;
+ val->intval = regval;
+
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ltc4015_get_vbat(struct ltc4162l_info *info,
+ unsigned int reg,
+ union power_supply_propval *val)
+{
+ unsigned int regval, chem_type;
+ int ret;
+
+ ret = regmap_read(info->regmap, reg, ®val);
+ if (ret)
+ return ret;
+
+ /*
+ * cell count x scaling factor
+ * ltc4015 lead-acid fixed and lead-acid programmable corresponds to
+ * 0x7 and 0x8 chem respectively
+ */
+ chem_type = ltc4162l_get_chem_type(info);
+ switch (chem_type) {
+ case ltc4162_lad ... ltc4162_fst:
+ regval *= 192264;
+ regval *= ltc4162l_get_cell_count(info);
+ regval /= 1000;
+ val->intval = regval;
+
+ return 0;
+ case ltc4162_sst - 1 ... ltc4162_sad - 1:
+ regval *= 128176;
+ regval *= ltc4162l_get_cell_count(info);
+ regval /= 1000;
+ val->intval = regval;
+
+ return 0;
+ default:
+ return -EINVAL;
+ }
}
static int ltc4162l_get_ibat(struct ltc4162l_info *info,
union power_supply_propval *val)
{
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
unsigned int regval;
int ret;
@@ -249,9 +356,8 @@ static int ltc4162l_get_ibat(struct ltc4162l_info *info,
if (ret)
return ret;
- /* Signed 16-bit number, 1.466μV / RSNSB amperes/LSB. */
ret = (s16)(regval & 0xFFFF);
- val->intval = 100 * mult_frac(ret, 14660, (int)info->rsnsb);
+ val->intval = mult_frac(ret, chip_info->ibat_resolution_uv, info->rsnsb);
return 0;
}
@@ -260,6 +366,7 @@ static int ltc4162l_get_ibat(struct ltc4162l_info *info,
static int ltc4162l_get_input_voltage(struct ltc4162l_info *info,
union power_supply_propval *val)
{
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
unsigned int regval;
int ret;
@@ -267,8 +374,7 @@ static int ltc4162l_get_input_voltage(struct ltc4162l_info *info,
if (ret)
return ret;
- /* 1.649mV/LSB */
- val->intval = regval * 1694;
+ val->intval = regval * chip_info->vin_resolution_mv;
return 0;
}
@@ -276,6 +382,7 @@ static int ltc4162l_get_input_voltage(struct ltc4162l_info *info,
static int ltc4162l_get_input_current(struct ltc4162l_info *info,
union power_supply_propval *val)
{
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
unsigned int regval;
int ret;
@@ -283,11 +390,9 @@ static int ltc4162l_get_input_current(struct ltc4162l_info *info,
if (ret)
return ret;
- /* Signed 16-bit number, 1.466μV / RSNSI amperes/LSB. */
ret = (s16)(regval & 0xFFFF);
- ret *= 14660;
+ ret *= chip_info->ibat_resolution_uv;
ret /= info->rsnsi;
- ret *= 100;
val->intval = ret;
@@ -336,7 +441,7 @@ static int ltc4162l_get_vcharge(struct ltc4162l_info *info,
unsigned int reg,
union power_supply_propval *val)
{
- unsigned int regval;
+ unsigned int regval, chem_type;
int ret;
u32 voltage;
@@ -348,37 +453,177 @@ static int ltc4162l_get_vcharge(struct ltc4162l_info *info,
/*
* charge voltage setting can be computed from
- * cell_count × (vcharge_setting × 12.5mV + 3.8125V)
- * where vcharge_setting ranges from 0 to 31 (4.2V max).
+ * cell_count × (vcharge_setting × a + b)
+ * where vcharge_setting ranges from 0 to c (d).
+ * for ltc4162l: a = 12.5mV , b = 3.8125V, c = 31, d = 4.2Vmax
+ * for ltc4162f: a = 12.5mV , b = 3.4125V, c = 31, d = 3.8Vmax
+ *
+ * for ltc4162s, the charge voltage setting can be computed from
+ * N x (vcharge_setting x 28.571mV + 6.0V)
+ * where N is 1, 2, 3, or 4 for 6V, 12V, 18V, or 24V battery respectively,
+ * and vcharge_setting ranges from 0 to 31
*/
- voltage = 3812500 + (regval * 12500);
- voltage *= ltc4162l_get_cell_count(info);
- val->intval = voltage;
+ chem_type = ltc4162l_get_chem_type(info);
+ switch (chem_type) {
+ case ltc4162_lad ... ltc4162_l40:
+ voltage = 3812500 + (regval * 12500);
+ voltage *= ltc4162l_get_cell_count(info);
+ val->intval = voltage;
- return 0;
+ return 0;
+ case ltc4162_fad ... ltc4162_fst:
+ voltage = 3412500 + (regval * 12500);
+ voltage *= ltc4162l_get_cell_count(info);
+ val->intval = voltage;
+
+ return 0;
+ case ltc4162_sst ... ltc4162_sad:
+ voltage = 6000000 + (regval * 28571);
+ voltage *= ltc4162l_get_cell_count(info) / 2;
+ val->intval = voltage;
+
+ return 0;
+ default:
+ return -EINVAL;
+ }
}
-static int ltc4162l_set_vcharge(struct ltc4162l_info *info,
- unsigned int reg,
- unsigned int value)
+static int ltc4015_get_vcharge(struct ltc4162l_info *info,
+ unsigned int reg,
+ union power_supply_propval *val)
{
- u8 cell_count = ltc4162l_get_cell_count(info);
+ unsigned int regval, chem_type;
+ int ret;
+ u32 voltage;
+
+ ret = regmap_read(info->regmap, reg, ®val);
+ if (ret)
+ return ret;
- if (!cell_count)
- return -EBUSY; /* Not available yet, try again later */
+ regval &= BIT(6) - 1; /* Only the lower 5 bits */
+
+ /*
+ * charge voltage setting can be computed from:
+ * cell_count × (vcharge_setting × a + b)
+ * where vcharge_setting ranges from 0 to c (d).
+ * Li-Ion: a = 1/80V, b = 3.8125V, c = 31, d = 4.2Vmax
+ * LiFePO4: a = 1/80V, b = 3.4125V, c = 31, d = 3.8Vmax
+ * Lead Acid: a = 1/105V, b = 2V, c = 35, d = 2.6Vmax
+ */
+ chem_type = ltc4162l_get_chem_type(info);
+ switch (chem_type) {
+ case ltc4162_lad ... ltc4162_l40:
+ voltage = 3812500 + (regval * 12500);
+ voltage *= ltc4162l_get_cell_count(info);
+ val->intval = voltage;
+
+ return 0;
+ case ltc4162_fad ... ltc4162_fst:
+ voltage = 3412500 + (regval * 12500);
+ voltage *= ltc4162l_get_cell_count(info);
+ val->intval = voltage;
+
+ return 0;
+ case ltc4162_sst - 1 ... ltc4162_sad - 1:
+ voltage = 2000000 + mult_frac(regval, 1000000, 105);
+ voltage *= ltc4162l_get_cell_count(info);
+ val->intval = voltage;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ltc4162l_vcharge(unsigned int base_voltage,
+ unsigned int scale_factor,
+ unsigned int range,
+ unsigned int value,
+ u8 cell_count)
+{
value /= cell_count;
- if (value < 3812500)
+ if (value < base_voltage)
return -EINVAL;
- value -= 3812500;
- value /= 12500;
+ value -= base_voltage;
+ value /= scale_factor;
- if (value > 31)
+ if (value > range)
return -EINVAL;
- return regmap_write(info->regmap, reg, value);
+ return value;
+}
+
+static int ltc4162l_set_vcharge(struct ltc4162l_info *info,
+ unsigned int reg,
+ unsigned int value)
+{
+ unsigned int chem_type;
+ u8 cell_count;
+
+ chem_type = ltc4162l_get_chem_type(info);
+ switch (chem_type) {
+ case ltc4162_lad ... ltc4162_l40:
+ cell_count = ltc4162l_get_cell_count(info);
+ if (!cell_count)
+ return -EBUSY;
+
+ value = ltc4162l_vcharge(3812500, 12500, 31, value, cell_count);
+ return regmap_write(info->regmap, reg, value);
+ case ltc4162_fad ... ltc4162_fst:
+ cell_count = ltc4162l_get_cell_count(info);
+ if (!cell_count)
+ return -EBUSY;
+
+ value = ltc4162l_vcharge(3412500, 12500, 31, value, cell_count);
+ return regmap_write(info->regmap, reg, value);
+ case ltc4162_sst ... ltc4162_sad:
+ cell_count = ltc4162l_get_cell_count(info) / 2;
+ if (!cell_count)
+ return -EBUSY;
+
+ value = ltc4162l_vcharge(6000000, 28571, 31, value, cell_count);
+ return regmap_write(info->regmap, reg, value);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ltc4015_set_vcharge(struct ltc4162l_info *info,
+ unsigned int reg,
+ unsigned int value)
+{
+ unsigned int chem_type;
+ u8 cell_count;
+
+ chem_type = ltc4162l_get_chem_type(info);
+ switch (chem_type) {
+ case ltc4162_lad ... ltc4162_l40:
+ cell_count = ltc4162l_get_cell_count(info);
+ if (!cell_count)
+ return -EBUSY;
+
+ value = ltc4162l_vcharge(3812500, 12500, 31, value, cell_count);
+ return regmap_write(info->regmap, reg, value);
+ case ltc4162_fad ... ltc4162_fst:
+ cell_count = ltc4162l_get_cell_count(info);
+ if (!cell_count)
+ return -EBUSY;
+
+ value = ltc4162l_vcharge(3412500, 12500, 31, value, cell_count);
+ return regmap_write(info->regmap, reg, value);
+ case ltc4162_sst - 1 ... ltc4162_sad - 1:
+ cell_count = ltc4162l_get_cell_count(info);
+ if (!cell_count)
+ return -EBUSY;
+
+ value = ltc4162l_vcharge(2000000, 1000000 / 105, 35,
+ value, cell_count);
+ return regmap_write(info->regmap, reg, value);
+ default:
+ return -EINVAL;
+ }
}
static int ltc4162l_get_iin_limit_dac(struct ltc4162l_info *info,
@@ -437,9 +682,30 @@ static int ltc4162l_get_die_temp(struct ltc4162l_info *info,
return 0;
}
+static int ltc4015_get_die_temp(struct ltc4162l_info *info,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(info->regmap, LTC4162L_DIE_TEMPERATURE, ®val);
+ if (ret)
+ return ret;
+
+ /* (die_temp - 12010) / 45.6°C */
+ ret = (s16)(regval & 0xFFFF);
+ ret -= 12010;
+ ret *= 1000;
+ ret /= 456;
+ val->intval = ret;
+
+ return 0;
+}
+
static int ltc4162l_get_term_current(struct ltc4162l_info *info,
union power_supply_propval *val)
{
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
unsigned int regval;
int ret;
@@ -457,10 +723,9 @@ static int ltc4162l_get_term_current(struct ltc4162l_info *info,
if (ret)
return ret;
- /* 1.466μV / RSNSB amperes/LSB */
- regval *= 14660u;
+ regval *= chip_info->ibat_resolution_uv;
regval /= info->rsnsb;
- val->intval = 100 * regval;
+ val->intval = regval;
return 0;
}
@@ -534,10 +799,11 @@ static ssize_t vbat_show(struct device *dev,
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
union power_supply_propval val;
int ret;
- ret = ltc4162l_get_vbat(info, LTC4162L_VBAT, &val);
+ ret = chip_info->get_vbat(info, LTC4162L_VBAT, &val);
if (ret)
return ret;
@@ -550,10 +816,11 @@ static ssize_t vbat_avg_show(struct device *dev,
{
struct power_supply *psy = to_power_supply(dev);
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
union power_supply_propval val;
int ret;
- ret = ltc4162l_get_vbat(info, LTC4162L_VBAT_FILT, &val);
+ ret = chip_info->get_vbat(info, LTC4162L_VBAT_FILT, &val);
if (ret)
return ret;
@@ -589,7 +856,8 @@ static ssize_t force_telemetry_show(struct device *dev,
if (ret)
return ret;
- return sysfs_emit(buf, "%u\n", regval & BIT(2) ? 1 : 0);
+ return sysfs_emit(buf, "%u\n", regval &
+ info->chip_info->telemetry_mask ? 1 : 0);
}
static ssize_t force_telemetry_store(struct device *dev,
@@ -607,7 +875,8 @@ static ssize_t force_telemetry_store(struct device *dev,
return ret;
ret = regmap_update_bits(info->regmap, LTC4162L_CONFIG_BITS_REG,
- BIT(2), value ? BIT(2) : 0);
+ info->chip_info->telemetry_mask,
+ value ? info->chip_info->telemetry_mask : 0);
if (ret < 0)
return ret;
@@ -681,6 +950,7 @@ static int ltc4162l_get_property(struct power_supply *psy,
union power_supply_propval *val)
{
struct ltc4162l_info *info = power_supply_get_drvdata(psy);
+ const struct ltc4162l_chip_info *chip_info = info->chip_info;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
@@ -702,15 +972,13 @@ static int ltc4162l_get_property(struct power_supply *psy,
return ltc4162l_get_icharge(info,
LTC4162L_CHARGE_CURRENT_SETTING, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
- return ltc4162l_get_vcharge(info,
- LTC4162L_VCHARGE_DAC, val);
+ return chip_info->get_vcharge(info, LTC4162L_VCHARGE_DAC, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
- return ltc4162l_get_vcharge(info,
- LTC4162L_VCHARGE_SETTING, val);
+ return chip_info->get_vcharge(info, LTC4162L_VCHARGE_SETTING, val);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return ltc4162l_get_iin_limit_dac(info, val);
case POWER_SUPPLY_PROP_TEMP:
- return ltc4162l_get_die_temp(info, val);
+ return chip_info->get_die_temp(info, val);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return ltc4162l_get_term_current(info, val);
default:
@@ -772,7 +1040,6 @@ static enum power_supply_property ltc4162l_properties[] = {
};
static const struct power_supply_desc ltc4162l_desc = {
- .name = "ltc4162-l",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = ltc4162l_properties,
.num_properties = ARRAY_SIZE(ltc4162l_properties),
@@ -781,6 +1048,50 @@ static const struct power_supply_desc ltc4162l_desc = {
.property_is_writeable = ltc4162l_property_is_writeable,
};
+static const struct ltc4162l_chip_info ltc4162l_chip_info = {
+ .name = "ltc4162-l",
+ .get_vbat = ltc4162l_get_vbat,
+ .get_vcharge = ltc4162l_get_vcharge,
+ .set_vcharge = ltc4162l_set_vcharge,
+ .get_die_temp = ltc4162l_get_die_temp,
+ .ibat_resolution_uv = 1466000,
+ .vin_resolution_mv = 1649,
+ .telemetry_mask = BIT(2),
+};
+
+static const struct ltc4162l_chip_info ltc4162f_chip_info = {
+ .name = "ltc4162-f",
+ .get_vbat = ltc4162l_get_vbat,
+ .get_vcharge = ltc4162l_get_vcharge,
+ .set_vcharge = ltc4162l_set_vcharge,
+ .get_die_temp = ltc4162l_get_die_temp,
+ .ibat_resolution_uv = 1466000,
+ .vin_resolution_mv = 1649,
+ .telemetry_mask = BIT(2),
+};
+
+static const struct ltc4162l_chip_info ltc4162s_chip_info = {
+ .name = "ltc4162-s",
+ .get_vbat = ltc4162l_get_vbat,
+ .get_vcharge = ltc4162l_get_vcharge,
+ .set_vcharge = ltc4162l_set_vcharge,
+ .get_die_temp = ltc4162l_get_die_temp,
+ .ibat_resolution_uv = 1466000,
+ .vin_resolution_mv = 1649,
+ .telemetry_mask = BIT(2),
+};
+
+static const struct ltc4162l_chip_info ltc4015_chip_info = {
+ .name = "ltc4015",
+ .get_vbat = ltc4015_get_vbat,
+ .get_vcharge = ltc4015_get_vcharge,
+ .set_vcharge = ltc4015_set_vcharge,
+ .get_die_temp = ltc4015_get_die_temp,
+ .ibat_resolution_uv = 1464870,
+ .vin_resolution_mv = 1648,
+ .telemetry_mask = BIT(4),
+};
+
static bool ltc4162l_is_writeable_reg(struct device *dev, unsigned int reg)
{
/* all registers up to this one are writeable */
@@ -825,6 +1136,8 @@ static int ltc4162l_probe(struct i2c_client *client)
struct device *dev = &client->dev;
struct ltc4162l_info *info;
struct power_supply_config ltc4162l_config = {};
+ struct power_supply_desc *desc;
+ const struct ltc4162l_chip_info *chip_info;
u32 value;
int ret;
@@ -839,6 +1152,12 @@ static int ltc4162l_probe(struct i2c_client *client)
info->client = client;
i2c_set_clientdata(client, info);
+ chip_info = i2c_get_match_data(client);
+ if (!chip_info)
+ return -ENODEV;
+
+ info->chip_info = chip_info;
+
info->regmap = devm_regmap_init_i2c(client, <c4162l_regmap_config);
if (IS_ERR(info->regmap)) {
dev_err(dev, "Failed to initialize register map\n");
@@ -870,8 +1189,15 @@ static int ltc4162l_probe(struct i2c_client *client)
ltc4162l_config.drv_data = info;
ltc4162l_config.attr_grp = ltc4162l_attr_groups;
- info->charger = devm_power_supply_register(dev, <c4162l_desc,
- <c4162l_config);
+ /* Duplicate the default descriptor to set name based on chip_info. */
+ desc = devm_kmemdup(dev, <c4162l_desc,
+ sizeof(struct power_supply_desc), GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+
+ desc->name = chip_info->name;
+
+ info->charger = devm_power_supply_register(dev, desc, <c4162l_config);
if (IS_ERR(info->charger)) {
dev_err(dev, "Failed to register charger\n");
return PTR_ERR(info->charger);
@@ -903,14 +1229,20 @@ static void ltc4162l_alert(struct i2c_client *client,
}
static const struct i2c_device_id ltc4162l_i2c_id_table[] = {
- { "ltc4162-l" },
+ { "ltc4162-l", (kernel_ulong_t)<c4162l_chip_info },
+ { "ltc4162-f", (kernel_ulong_t)<c4162f_chip_info },
+ { "ltc4162-s", (kernel_ulong_t)<c4162s_chip_info },
+ { "ltc4015", (kernel_ulong_t)<c4015_chip_info },
{ }
};
MODULE_DEVICE_TABLE(i2c, ltc4162l_i2c_id_table);
static const struct of_device_id ltc4162l_of_match[] __maybe_unused = {
- { .compatible = "lltc,ltc4162-l", },
- { },
+ { .compatible = "lltc,ltc4162-l", .data = <c4162l_chip_info },
+ { .compatible = "lltc,ltc4162-f", .data = <c4162f_chip_info },
+ { .compatible = "lltc,ltc4162-s", .data = <c4162s_chip_info },
+ { .compatible = "lltc,ltc4015", .data = <c4015_chip_info },
+ { }
};
MODULE_DEVICE_TABLE(of, ltc4162l_of_match);
LTC4162-L 35V/3.2A Multi-Cell Lithium-Ion Step-Down Battery Charger LTC4162-F 35V/3.2A Multi-Cell LiFePO4 Step-Down Battery Charger LTC4162-S 35V/3.2A Lead-Acid Step-Down Battery Charger LTC4015 35V/3.2A Multichemistry Buck Battery Charger Controller Add chip_info struct to hold the chip specific data. Modify functions for battery voltage/current, input voltage/current, charge voltage, die temp, and force telemetry to handle different battery chemistries. Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com> --- V1 -> V2: Modified commit message describing differences between variants/devices. drivers/power/supply/ltc4162-l-charger.c | 434 ++++++++++++++++++++--- 1 file changed, 383 insertions(+), 51 deletions(-)