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drivers: charger: charger_max20355: handle thermistor mode

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Allow to configure thermistor monitoring mode.

Signed-off-by: Lukasz Madej <l.madej@grinn-global.com>
This commit is contained in:
Lukasz Madej 2024-02-10 14:39:17 +01:00 committed by Anas Nashif
parent bda4c18fc9
commit a64a64b3c2
4 changed files with 84 additions and 0 deletions
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1
doc/releases/release-notes-3.7.rst
View file

@ -103,6 +103,7 @@ Drivers and Sensors
* Added ``chgin-to-sys-current-limit-microamp`` property to ``maxim,max20335-charger``.
* Added ``system-voltage-min-threshold-microvolt`` property to ``maxim,max20335-charger``.
* Added ``re-charge-threshold-microvolt`` property to ``maxim,max20335-charger``.
* Added ``thermistor-monitoring-mode`` property to ``maxim,max20335-charger``.
* Clock control

70
drivers/charger/charger_max20335.c
View file

@ -25,6 +25,7 @@ LOG_MODULE_REGISTER(max20335_charger);
#define MAX20335_REG_INTMASKB 0x08
#define MAX20335_REG_ILIMCNTL 0x09
#define MAX20335_REG_CHGCNTLA 0x0A
#define MAX20335_REG_THRMCFG 0x18
#define MAX20335_INTA_USBOK_MASK BIT(3)
#define MAX20335_INTA_CHGSTAT_MASK BIT(6)
@ -36,6 +37,7 @@ LOG_MODULE_REGISTER(max20335_charger);
#define MAX20335_CHGCNTLA_BATREG_MASK GENMASK(4, 1)
#define MAX20335_CHGCNTLA_CHRGEN_MASK BIT(0)
#define MAX20335_CHGCNTLA_CHRGEN BIT(0)
#define MAX20335_THRMCFG_THERMEN_MASK GENMASK(1, 0)
#define MAX20335_REG_CVC_VREG_MIN_UV 4050000U
#define MAX20335_REG_CVC_VREG_STEP_UV 50000U
@ -49,6 +51,14 @@ LOG_MODULE_REGISTER(max20335_charger);
#define INT_ENABLE_DELAY K_MSEC(500)
enum charger_max20335_therm_mode {
MAX20335_THERM_MODE_DISABLED,
MAX20335_THERM_MODE_THERMISTOR,
MAX20335_THERM_MODE_JEITA_1,
MAX20335_THERM_MODE_JEITA_2,
MAX20335_THERM_MODE_UNKNOWN,
};
struct charger_max20335_config {
struct i2c_dt_spec bus;
struct gpio_dt_spec int_gpio;
@ -56,6 +66,7 @@ struct charger_max20335_config {
uint32_t max_ichgin_to_sys_ua;
uint32_t min_vsys_uv;
uint32_t recharge_threshold_uv;
char *therm_mon_mode;
};
struct charger_max20335_data {
@ -264,6 +275,37 @@ static int max20335_set_sys_voltage_min_threshold(const struct device *dev, uint
val);
}
static int max20335_set_thermistor_mode(const struct device *dev,
enum charger_max20335_therm_mode mode)
{
const struct charger_max20335_config *const config = dev->config;
uint8_t val;
switch (mode) {
case MAX20335_THERM_MODE_DISABLED:
val = 0x00;
break;
case MAX20335_THERM_MODE_THERMISTOR:
val = 0x01;
break;
case MAX20335_THERM_MODE_JEITA_1:
val = 0x02;
break;
case MAX20335_THERM_MODE_JEITA_2:
val = 0x03;
break;
default:
return -ENOTSUP;
};
val = FIELD_PREP(MAX20335_THRMCFG_THERMEN_MASK, val);
return i2c_reg_update_byte_dt(&config->bus,
MAX20335_REG_THRMCFG,
MAX20335_THRMCFG_THERMEN_MASK,
val);
}
static int max20335_set_enabled(const struct device *dev, bool enable)
{
struct charger_max20335_data *data = dev->data;
@ -341,10 +383,30 @@ static int max20335_init_properties(const struct device *dev)
return 0;
}
enum charger_max20335_therm_mode max20335_string_to_therm_mode(const char *mode_string)
{
static const char * const modes[] = {
[MAX20335_THERM_MODE_DISABLED] = "disabled",
[MAX20335_THERM_MODE_THERMISTOR] = "thermistor",
[MAX20335_THERM_MODE_JEITA_1] = "JEITA-1",
[MAX20335_THERM_MODE_JEITA_2] = "JEITA-2",
};
enum charger_max20335_therm_mode i;
for (i = MAX20335_THERM_MODE_DISABLED; i < ARRAY_SIZE(modes); i++) {
if (strncmp(mode_string, modes[i], strlen(modes[i])) == 0) {
return i;
}
}
return MAX20335_THERM_MODE_UNKNOWN;
}
static int max20335_update_properties(const struct device *dev)
{
struct charger_max20335_data *data = dev->data;
const struct charger_max20335_config *config = dev->config;
enum charger_max20335_therm_mode therm_mode;
int ret;
ret = max20335_set_chgin_to_sys_current_limit(dev, config->max_ichgin_to_sys_ua);
@ -365,6 +427,13 @@ static int max20335_update_properties(const struct device *dev)
return ret;
}
therm_mode = max20335_string_to_therm_mode(config->therm_mon_mode);
ret = max20335_set_thermistor_mode(dev, therm_mode);
if (ret < 0) {
LOG_ERR("Failed to set thermistor mode: %d", ret);
return ret;
}
ret = max20335_set_constant_charge_voltage(dev, data->charge_voltage_uv);
if (ret < 0) {
LOG_ERR("Failed to set charge voltage: %d", ret);
@ -592,6 +661,7 @@ static const struct charger_driver_api max20335_driver_api = {
.max_ichgin_to_sys_ua = DT_INST_PROP(inst, chgin_to_sys_current_limit_microamp),\
.min_vsys_uv = DT_INST_PROP(inst, system_voltage_min_threshold_microvolt), \
.recharge_threshold_uv = DT_INST_PROP(inst, re_charge_threshold_microvolt), \
.therm_mon_mode = DT_INST_PROP(inst, thermistor_monitoring_mode), \
}; \
\
DEVICE_DT_INST_DEFINE(inst, &max20335_init, NULL, &charger_max20335_data_##inst, \

12
dts/bindings/charger/maxim,max20335-charger.yaml
View file

@ -65,6 +65,18 @@ properties:
Recharge threshold in relation to BatReg.
Refer to ChgCntlA register description for details.
thermistor-monitoring-mode:
type: string
required: true
enum:
- "disabled"
- "thermistor"
- "JEITA-1"
- "JEITA-2"
description: |
Thermistor monitoring mode.
Refer to ThrmCfg register description and Table 2 for details.
int-gpios:
type: phandle-array
required: true

1
tests/drivers/build_all/charger/i2c.dtsi
View file

@ -28,6 +28,7 @@ max20335@1 {
constant-charge-voltage-max-microvolt = <4050000>;
system-voltage-min-threshold-microvolt = <3600000>;
re-charge-threshold-microvolt = <170000>;
thermistor-monitoring-mode = "JEITA-2";
int-gpios = <&test_gpio 0 0>;
};
};