drivers: regulator: npm1300: Add PFM mode

Set regulator mode updated to support forced PFM mode Signed-off-by: Andy Sinclair <[email protected]>
phan-uy-vu · Sep 13, 2023 · 49ef9be · 49ef9be
1 parent 450dbb1
commit 49ef9be
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Showing 2 changed files with 22 additions and 4 deletions.
diff --git a/drivers/regulator/regulator_npm1300.c b/drivers/regulator/regulator_npm1300.c
@@ -265,17 +265,34 @@ int regulator_npm1300_get_voltage(const struct device *dev, int32_t *volt_uv)
 static int set_buck_mode(const struct device *dev, uint8_t chan, regulator_mode_t mode)
 {
 	const struct regulator_npm1300_config *config = dev->config;
+	uint8_t pfm_mask = BIT(chan);
+	uint8_t pfm_data;
+	uint8_t pwm_reg;
+	int ret;
 
 	switch (mode) {
 	case NPM1300_BUCK_MODE_PWM:
-		return mfd_npm1300_reg_write(config->mfd, BUCK_BASE,
-					     BUCK_OFFSET_PWM_SET + (chan * 2U), 1U);
+		pfm_data = 0U;
+		pwm_reg = BUCK_OFFSET_PWM_SET;
+		break;
 	case NPM1300_BUCK_MODE_AUTO:
-		return mfd_npm1300_reg_write(config->mfd, BUCK_BASE,
-					     BUCK_OFFSET_PWM_CLR + (chan * 2U), 1U);
+		pfm_data = 0U;
+		pwm_reg = BUCK_OFFSET_PWM_CLR;
+		break;
+	case NPM1300_BUCK_MODE_PFM:
+		pfm_data = pfm_mask;
+		pwm_reg = BUCK_OFFSET_PWM_CLR;
+		break;
 	default:
 		return -ENOTSUP;
 	}
+
+	ret = mfd_npm1300_reg_update(config->mfd, BUCK_BASE, BUCK_OFFSET_CTRL0, pfm_data, pfm_mask);
+	if (ret < 0) {
+		return ret;
+	}
+
+	return mfd_npm1300_reg_write(config->mfd, BUCK_BASE, pwm_reg + (chan * 2U), 1U);
 }
 
 static int set_ldsw_mode(const struct device *dev, uint8_t chan, regulator_mode_t mode)

diff --git a/include/zephyr/dt-bindings/regulator/npm1300.h b/include/zephyr/dt-bindings/regulator/npm1300.h
@@ -20,6 +20,7 @@
 /* Buck modes */
 #define NPM1300_BUCK_MODE_AUTO 0x00U
 #define NPM1300_BUCK_MODE_PWM  0x01U
+#define NPM1300_BUCK_MODE_PFM  0x04U
 
 /* LDSW / LDO modes */
 #define NPM1300_LDSW_MODE_LDO  0x02U