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regulator: cp9314: Adds support for PGOOD pin

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Adds support for the PGOOD pin. This pin is asserted by the
regulator when converter startup has completed and the output
is stable. If the PGOOD pin is not used, the PGOOD state is
check via the PGOOD_PIN_STS bit.

Signed-off-by: Ricardo Rivera-Matos <rriveram@opensource.cirrus.com>
This commit is contained in:
Ricardo Rivera-Matos 2024-03-27 19:16:42 +00:00 committed by Alberto Escolar
parent 99816aba6b
commit f9ce311855
2 changed files with 40 additions and 1 deletions
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37
drivers/regulator/regulator_cp9314.c
View file

@ -156,6 +156,7 @@ LOG_MODULE_REGISTER(CP9314, CONFIG_REGULATOR_LOG_LEVEL);
#define CP9314_SOFT_RESET_DELAY_MSEC 200
#define CP9314_EN_DEBOUNCE_USEC 3000
#define CP9314_T_STARTUP_MSEC 120
#define CP9314_DEVICE_MODE_HOST_4GANG_0x78 0x0
#define CP9314_DEVICE_MODE_HOST_4GANG_0x72 0x1
@ -184,6 +185,7 @@ struct regulator_cp9314_config {
struct regulator_common_config common;
struct i2c_dt_spec i2c;
struct gpio_dt_spec en_pin;
struct gpio_dt_spec pgood_pin;
uint8_t initial_op_mode_idx;
};
@ -268,7 +270,10 @@ static int regulator_cp9314_enable(const struct device *dev)
}
if (config->en_pin.port != NULL) {
return gpio_pin_set_dt(&config->en_pin, 1);
ret = gpio_pin_set_dt(&config->en_pin, 1);
if (ret < 0) {
return ret;
}
} else {
ret = i2c_reg_update_byte_dt(&config->i2c, CP9314_REG_CTRL1, CP9314_CP_EN,
CP9314_CP_EN);
@ -278,6 +283,24 @@ static int regulator_cp9314_enable(const struct device *dev)
}
}
k_msleep(CP9314_T_STARTUP_MSEC);
if (config->pgood_pin.port != NULL) {
ret = gpio_pin_get_dt(&config->pgood_pin);
if (ret < 0) {
return ret;
} else if (ret == 0) {
return -EINVAL;
}
} else {
ret = i2c_reg_read_byte_dt(&config->i2c, CP9314_REG_CONVERTER, &value);
if (ret < 0) {
return ret;
} else if (FIELD_GET(CP9314_PGOOD_PIN_STS, value) == 0U) {
return -EINVAL;
}
}
return 0;
}
@ -408,6 +431,17 @@ static int regulator_cp9314_init(const struct device *dev)
return -ENOTSUP;
}
if (config->pgood_pin.port != NULL) {
if (!gpio_is_ready_dt(&config->pgood_pin)) {
return -ENODEV;
}
ret = gpio_pin_configure_dt(&config->pgood_pin, GPIO_INPUT);
if (ret < 0) {
return ret;
}
}
if (config->en_pin.port != NULL) {
if (!gpio_is_ready_dt(&config->en_pin)) {
return -ENODEV;
@ -525,6 +559,7 @@ static const struct regulator_driver_api api = {
.common = REGULATOR_DT_INST_COMMON_CONFIG_INIT(inst), \
.i2c = I2C_DT_SPEC_INST_GET(inst), \
.en_pin = GPIO_DT_SPEC_INST_GET_OR(inst, cirrus_en_gpios, {}), \
.pgood_pin = GPIO_DT_SPEC_INST_GET_OR(inst, cirrus_pgood_gpios, {}), \
.initial_op_mode_idx = \
DT_INST_ENUM_IDX_OR(inst, cirrus_initial_switched_capacitor_mode, -1) + 1, \
}; \

4
dts/bindings/regulator/cirrus,cp9314.yaml
View file

@ -27,6 +27,10 @@ properties:
type: phandle-array
description: GPIO tied to EN pin
cirrus,pgood-gpios:
type: phandle-array
description: GPIO tied to PGOOD pin
cirrus,initial-switched-capacitor-mode:
type: string
enum: