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drivers: regulator: npm1300: Set voltage checks existing setting

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Regulator voltage setting is not applied if the device output
is already configured for the requested voltage.
This change is needed to ensure correct device behaviour.

Signed-off-by: Andy Sinclair <andy.sinclair@nordicsemi.no>
This commit is contained in:
Andy Sinclair 2023-08-30 15:26:02 +01:00 • committed by Carles Cufí
commit dd52908fcf
1 changed files with 31 additions and 17 deletions
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48
drivers/regulator/regulator_npm1300.c
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@ -141,10 +141,33 @@ static int retention_set_voltage(const struct device *dev, int32_t retention_uv)
idx);
}
static int buck_get_voltage_index(const struct device *dev, uint8_t chan, uint8_t *idx)
{
const struct regulator_npm1300_config *config = dev->config;
uint8_t sel;
int ret;
ret = mfd_npm1300_reg_read(config->mfd, BUCK_BASE, BUCK_OFFSET_SW_CTRL, &sel);
if (ret < 0) {
return ret;
}
if ((sel >> chan) & 1U) {
/* SW control */
return mfd_npm1300_reg_read(config->mfd, BUCK_BASE,
BUCK_OFFSET_VOUT_NORM + (chan * 2U), idx);
}
/* VSET pin control */
return mfd_npm1300_reg_read(config->mfd, BUCK_BASE, BUCK_OFFSET_VOUT_STAT + chan, idx);
}
static int buck_set_voltage(const struct device *dev, uint8_t chan, int32_t min_uv, int32_t max_uv)
{
const struct regulator_npm1300_config *config = dev->config;
uint8_t mask;
uint8_t curr_idx;
uint16_t idx;
int ret;
@ -154,6 +177,13 @@ static int buck_set_voltage(const struct device *dev, uint8_t chan, int32_t min_
return ret;
}
/* Get current setting, and return if current and new index match */
ret = buck_get_voltage_index(dev, chan, &curr_idx);
if ((ret < 0) || (idx == curr_idx)) {
return ret;
}
ret = mfd_npm1300_reg_write(config->mfd, BUCK_BASE, BUCK_OFFSET_VOUT_NORM + (chan * 2U),
idx);
@ -201,26 +231,10 @@ int regulator_npm1300_set_voltage(const struct device *dev, int32_t min_uv, int3
static int buck_get_voltage(const struct device *dev, uint8_t chan, int32_t *volt_uv)
{
const struct regulator_npm1300_config *config = dev->config;
uint8_t sel;
uint8_t idx;
int ret;
ret = mfd_npm1300_reg_read(config->mfd, BUCK_BASE, BUCK_OFFSET_SW_CTRL, &sel);
if (ret < 0) {
return ret;
}
if ((sel >> chan) & 1U) {
/* SW control */
ret = mfd_npm1300_reg_read(config->mfd, BUCK_BASE,
BUCK_OFFSET_VOUT_NORM + (chan * 2U), &idx);
} else {
/* VSET pin control */
ret = mfd_npm1300_reg_read(config->mfd, BUCK_BASE, BUCK_OFFSET_VOUT_STAT + chan,
&idx);
}
ret = buck_get_voltage_index(dev, chan, &idx);
if (ret < 0) {
return ret;