2 files changed, 85 insertions, 0 deletions
diff --git a/host/include/uhd/features/discoverable_feature.hpp b/host/include/uhd/features/discoverable_feature.hpp
index b1a03eaea..e56c3f6e3 100644
--- a/host/include/uhd/features/discoverable_feature.hpp
+++ b/host/include/uhd/features/discoverable_feature.hpp
@@ -35,6 +35,7 @@ public:
         ADC_SELF_CALIBRATION,
         REF_CLK_CALIBRATION,
         TRIG_IO_MODE,
+        GPIO_POWER,
     };
 
     virtual ~discoverable_feature() = default;
diff --git a/host/include/uhd/features/gpio_power_iface.hpp b/host/include/uhd/features/gpio_power_iface.hpp
new file mode 100644
index 000000000..5f236cfec
--- /dev/null
+++ b/host/include/uhd/features/gpio_power_iface.hpp
@@ -0,0 +1,84 @@
+//
+// Copyright 2021 Ettus Research, a National Instruments Brand
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#pragma once
+
+#include <uhd/features/discoverable_feature.hpp>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace uhd { namespace features {
+
+/*! Interface to provide access to configuring the voltage level and external
+ * power export configurations of GPIO banks.
+ */
+class gpio_power_iface : public discoverable_feature
+{
+public:
+    using sptr = std::shared_ptr<gpio_power_iface>;
+
+    static discoverable_feature::feature_id_t get_feature_id()
+    {
+        return discoverable_feature::GPIO_POWER;
+    }
+
+    std::string get_feature_name() const
+    {
+        return "GPIO power configuration";
+    }
+
+    virtual ~gpio_power_iface() = default;
+
+    /*! Return what I/O voltage levels are supported on the given port. Voltages
+     * use a V in place of the decimal point - typical values include "1V8" for
+     * 1.8 volts, "3V3" for 3.3 volts, et cetera.
+     *
+     * \param port Port to list supported voltages for.
+     * \return A vector of supported voltage levels.
+     */
+    virtual std::vector<std::string> get_supported_voltages(
+        const std::string& port) const = 0;
+
+    /*! Set the I/O voltage on the given port to the given value.
+     *
+     * \param port Port to set the voltage on.
+     * \param voltage Voltage level to set. See \ref get_supported_voltages for a list
+     * of supported voltages.
+     */
+    virtual void set_port_voltage(
+        const std::string& port, const std::string& voltage) = 0;
+
+    /*! Gets the current I/O voltage level that the port is set to.
+     *
+     * \param port Port to retrieve the voltage level for
+     * \return The voltage level for the given port
+     */
+    virtual std::string get_port_voltage(const std::string& port) const = 0;
+
+    /*! Enables or disables the power supply exposed through the GPIO ports. The
+     * GPIO lines will function without external power enabled - the power supply
+     * is simply to provide a means for external circuitry to receive power from
+     * the device. See your device's documentation for more information on the
+     * voltage and current specifications of the external power supply.
+     *
+     * \param port The port to export power through.
+     * \param enable true to enable power, false to disable.
+     */
+    virtual void set_external_power(const std::string& port, bool enable) = 0;
+
+    /*! Retrieve the status of the external power on the given port. The status
+     * can be one of three values:
+     * "OFF" - External power is disabled (the default)
+     * "ON" - External power is on and functioning normally
+     * "FAULT" - The external power supply has encountered a fault condition.
+     *
+     * \param port Port to retrieve status from
+     */
+    virtual std::string get_external_power_status(const std::string& port) const = 0;
+};
+
+}} // namespace uhd::features