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regulator: npm1300: configure active discharge

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Configure the active discharge feature for both the BUCK and LDO/LDSW
blocks through the appropriate registers.

Signed-off-by: Jordan Yates <jordan@embeint.com>
This commit is contained in:
Jordan Yates 2025-04-15 18:17:12 +10:00 • committed by Benjamin Cabé
commit 5dcaf077e7
2 changed files with 49 additions and 6 deletions
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50
drivers/regulator/regulator_npm1300.c
View file

@ -62,16 +62,20 @@ enum npm1300_gpio_type {
/* nPM1300 ship register offsets */
#define SHIP_OFFSET_SHIP 0x02U
#define BUCK1_ON_MASK 0x04U
#define BUCK2_ON_MASK 0x40U
#define BUCK1_ON_MASK 0x04U
#define BUCK2_ON_MASK 0x40U
#define BUCK1_EN_PULLDOWN_MASK BIT(2)
#define BUCK2_EN_PULLDOWN_MASK BIT(3)
#define LDSW1_ON_MASK 0x03U
#define LDSW2_ON_MASK 0x0CU
#define LDSW1_SOFTSTART_MASK 0x0CU
#define LDSW1_SOFTSTART_SHIFT 2U
#define LDSW2_SOFTSTART_MASK 0x30U
#define LDSW2_SOFTSTART_SHIFT 4U
#define LDSW1_SOFTSTART_MASK 0x0CU
#define LDSW1_SOFTSTART_SHIFT 2U
#define LDSW1_ACTIVE_DISCHARGE_MASK BIT(6)
#define LDSW2_SOFTSTART_MASK 0x30U
#define LDSW2_SOFTSTART_SHIFT 4U
#define LDSW2_ACTIVE_DISCHARGE_MASK BIT(7)
#define NPM1300_GPIO_UNUSED UINT8_MAX
@ -94,6 +98,7 @@ struct regulator_npm1300_config {
struct npm1300_gpio_info retention_gpios;
struct npm1300_gpio_info pwm_gpios;
uint8_t soft_start;
bool active_discharge;
bool ldo_disable_workaround;
};
@ -603,6 +608,32 @@ static int soft_start_set(const struct device *dev, uint8_t soft_start)
}
}
static int active_discharge_set(const struct device *dev, bool enabled)
{
const struct regulator_npm1300_config *config = dev->config;
switch (config->source) {
case NPM1300_SOURCE_BUCK1:
return mfd_npm1300_reg_update(config->mfd, BUCK_BASE, BUCK_OFFSET_CTRL0,
enabled ? BUCK1_EN_PULLDOWN_MASK : 0,
BUCK1_EN_PULLDOWN_MASK);
case NPM1300_SOURCE_BUCK2:
return mfd_npm1300_reg_update(config->mfd, BUCK_BASE, BUCK_OFFSET_CTRL0,
enabled ? BUCK2_EN_PULLDOWN_MASK : 0,
BUCK2_EN_PULLDOWN_MASK);
case NPM1300_SOURCE_LDO1:
return mfd_npm1300_reg_update(config->mfd, LDSW_BASE, LDSW_OFFSET_CONFIG,
enabled ? LDSW1_ACTIVE_DISCHARGE_MASK : 0,
LDSW1_ACTIVE_DISCHARGE_MASK);
case NPM1300_SOURCE_LDO2:
return mfd_npm1300_reg_update(config->mfd, LDSW_BASE, LDSW_OFFSET_CONFIG,
enabled ? LDSW2_ACTIVE_DISCHARGE_MASK : 0,
LDSW2_ACTIVE_DISCHARGE_MASK);
default:
return -ENODEV;
}
}
int regulator_npm1300_init(const struct device *dev)
{
const struct regulator_npm1300_config *config = dev->config;
@ -639,6 +670,12 @@ int regulator_npm1300_init(const struct device *dev)
}
}
/* Configure active discharge */
ret = active_discharge_set(dev, config->active_discharge);
if (ret != 0) {
return ret;
}
/* Configure GPIO pin control */
ret = regulator_npm1300_set_pin_ctrl(dev, &config->enable_gpios, NPM1300_GPIO_TYPE_ENABLE);
if (ret != 0) {
@ -690,6 +727,7 @@ static DEVICE_API(regulator, api) = {
.enable_gpios = GPIO_CONFIG_DEFINE(node_id, enable_gpio_config), \
.retention_gpios = GPIO_CONFIG_DEFINE(node_id, retention_gpio_config), \
.pwm_gpios = GPIO_CONFIG_DEFINE(node_id, pwm_gpio_config), \
.active_discharge = DT_PROP(node_id, active_discharge), \
.ldo_disable_workaround = DT_PROP(node_id, nordic_anomaly38_disable_workaround)}; \
\
DEVICE_DT_DEFINE(node_id, regulator_npm1300_init, NULL, &data_##id, &config_##id, \

5
dts/bindings/regulator/nordic,npm1300-regulator.yaml
View file

@ -97,6 +97,11 @@ child-binding:
description: |
Soft start current limit in microamps.
active-discharge:
type: boolean
description: |
Enable active-discharge on the BUCK/LDO/LDSW output when disabled.
nordic,anomaly38-disable-workaround:
type: boolean
description: |