diff --git a/nyx/Makefile b/nyx/Makefile
index 31a58f5..0aff055 100644
--- a/nyx/Makefile
+++ b/nyx/Makefile
@@ -39,7 +39,7 @@ OBJS += $(addprefix $(BUILDDIR)/$(TARGET)/, \
 	bpmp.o clock.o cluster.o di.o gpio.o i2c.o mc.o sdram.o pinmux.o se.o smmu.o tsec.o uart.o \
 	fuse.o kfuse.o minerva.o \
 	sdmmc.o sdmmc_driver.o \
-	bq24193.o max17050.o max7762x.o max77620-rtc.o \
+	bq24193.o max17050.o max7762x.o max77620-rtc.o regulator_5v.o \
 	touch.o tmp451.o fan.o \
 	hw_init.o \
 )
diff --git a/nyx/nyx_gui/power/regulator_5v.c b/nyx/nyx_gui/power/regulator_5v.c
new file mode 100644
index 0000000..a65615a
--- /dev/null
+++ b/nyx/nyx_gui/power/regulator_5v.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2019 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../soc/gpio.h"
+#include "../soc/pinmux.h"
+#include "../soc/t210.h"
+#include "../utils/types.h"
+
+static u8 reg_5v_dev = 0;
+
+void regulator_enable_5v(u8 dev)
+{
+	// The power supply selection from battery or USB is automatic.
+	if (!reg_5v_dev)
+	{
+		// Fan and Rail power from internal 5V regulator (battery).
+		PINMUX_AUX(PINMUX_AUX_SATA_LED_ACTIVE) = 1;
+		gpio_config(GPIO_PORT_A, GPIO_PIN_5, GPIO_MODE_GPIO);
+		gpio_output_enable(GPIO_PORT_A, GPIO_PIN_5, GPIO_OUTPUT_ENABLE);
+		gpio_write(GPIO_PORT_A, GPIO_PIN_5, GPIO_HIGH);
+
+		// Fan and Rail power from USB 5V VDD.
+		PINMUX_AUX(PINMUX_AUX_USB_VBUS_EN0) = PINMUX_LPDR | 1;
+		gpio_config(GPIO_PORT_CC, GPIO_PIN_4, GPIO_MODE_GPIO);
+		gpio_output_enable(GPIO_PORT_CC, GPIO_PIN_4, GPIO_OUTPUT_ENABLE);
+		gpio_write(GPIO_PORT_CC, GPIO_PIN_4, GPIO_HIGH);
+	}
+	reg_5v_dev |= dev;
+}
+
+void regulator_disable_5v(u8 dev)
+{
+	reg_5v_dev &= ~dev;
+
+	if (!reg_5v_dev)
+	{
+		// Rail power from internal 5V regulator (battery).
+		gpio_write(GPIO_PORT_A, GPIO_PIN_5, GPIO_LOW);
+		gpio_output_enable(GPIO_PORT_A, GPIO_PIN_5, GPIO_OUTPUT_DISABLE);
+		gpio_config(GPIO_PORT_A, GPIO_PIN_5, GPIO_MODE_SPIO);
+		PINMUX_AUX(PINMUX_AUX_SATA_LED_ACTIVE) = PINMUX_PARKED | PINMUX_INPUT_ENABLE;
+
+		// Rail power from USB 5V VDD.
+		gpio_write(GPIO_PORT_CC, GPIO_PIN_4, GPIO_LOW);
+		gpio_output_enable(GPIO_PORT_CC, GPIO_PIN_4, GPIO_OUTPUT_DISABLE);
+		gpio_config(GPIO_PORT_CC, GPIO_PIN_4, GPIO_MODE_SPIO);
+		PINMUX_AUX(PINMUX_AUX_USB_VBUS_EN0) = PINMUX_IO_HV | PINMUX_LPDR | PINMUX_PARKED | PINMUX_INPUT_ENABLE;
+	}
+}
+
+bool regulator_get_5v_dev_enabled(u8 dev)
+{
+	return (reg_5v_dev & dev);
+}
diff --git a/nyx/nyx_gui/power/regulator_5v.h b/nyx/nyx_gui/power/regulator_5v.h
new file mode 100644
index 0000000..7608881
--- /dev/null
+++ b/nyx/nyx_gui/power/regulator_5v.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2019 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _REGULATOR_5V_H_
+#define _REGULATOR_5V_H_
+
+#include "../utils/types.h"
+
+enum
+{
+	REGULATOR_5V_FAN  = (1 << 0),
+	REGULATOR_5V_JC_R = (1 << 1),
+	REGULATOR_5V_JC_L = (1 << 2),
+	REGULATOR_5V_ALL  = 0xFF
+};
+
+void regulator_enable_5v(u8 dev);
+void regulator_disable_5v(u8 dev);
+bool regulator_get_5v_dev_enabled(u8 dev);
+
+#endif
\ No newline at end of file