regulator: cp9314: Prevents reset while switching

Configures and initializes the EN GPIO to inactive prior
to calling the soft reset sequence during probe. The EN
pin may have been left asserted by the hardware on some systems.

Signed-off-by: Ricardo Rivera-Matos <[email protected]>

drivers/regulator/regulator_cp9314.c

@@ -155,6 +155,7 @@ LOG_MODULE_REGISTER(CP9314, CONFIG_REGULATOR_LOG_LEVEL);
 #define CP9314_STS_ADDR_LVL      GENMASK(3, 0)
 
 #define CP9314_SOFT_RESET_DELAY_MSEC 200
+#define CP9314_EN_DEBOUNCE_USEC      3000
 
 #define CP9314_DEVICE_MODE_HOST_4GANG_0x78      0x0
 #define CP9314_DEVICE_MODE_HOST_4GANG_0x72      0x1
@@ -410,6 +411,23 @@ static int regulator_cp9314_init(const struct device *dev)
 		return -ENOTSUP;
 	}
 
+	if (config->en_pin.port != NULL) {
+		if (!gpio_is_ready_dt(&config->en_pin)) {
+			return -ENODEV;
+		}
+
+		ret = gpio_pin_configure_dt(&config->en_pin, GPIO_OUTPUT_INACTIVE);
+		if (ret < 0) {
+			return ret;
+		}
+
+#ifdef CONFIG_MULTITHREADING
+		k_usleep(CP9314_EN_DEBOUNCE_USEC);
+#else
+		k_busy_wait(CP9314_EN_DEBOUNCE_USEC);
+#endif
+	}
+
 	ret = cp9314_do_soft_reset(dev);
 	if (ret < 0) {
 		return ret;
@@ -440,17 +458,6 @@ static int regulator_cp9314_init(const struct device *dev)
 		return ret;
 	}
 
-	if (config->en_pin.port != NULL) {
-		if (!gpio_is_ready_dt(&config->en_pin)) {
-			return -ENODEV;
-		}
-
-		ret = gpio_pin_configure_dt(&config->en_pin, GPIO_OUTPUT_INACTIVE);
-		if (ret < 0) {
-			return ret;
-		}
-	}
-
 	ret = i2c_reg_update_byte_dt(&config->i2c, CP9314_REG_CTRL4, CP9314_FRC_OP_MODE,
 				     CP9314_FRC_OP_MODE);
 	if (ret < 0) {