[PATCH 3/4] GPIO API: Add GPIO API

Duc Doan dtbpkmte at gmail.com
Tue Jul 5 13:05:06 UTC 2022


---
 bsps/include/bsp/gpio2.h    | 538 ++++++++++++++++++++++++++++++++++++
 bsps/shared/dev/gpio/gpio.c | 196 +++++++++++++
 spec/build/bsps/obj.yml     |   2 +-
 3 files changed, 735 insertions(+), 1 deletion(-)
 create mode 100644 bsps/include/bsp/gpio2.h
 create mode 100644 bsps/shared/dev/gpio/gpio.c

diff --git a/bsps/include/bsp/gpio2.h b/bsps/include/bsp/gpio2.h
new file mode 100644
index 0000000000..e99967cd47
--- /dev/null
+++ b/bsps/include/bsp/gpio2.h
@@ -0,0 +1,538 @@
+/**
+  * @file
+  *
+  * @ingroup rtems_gpio2
+  *
+  * @brief RTEMS GPIO new API definition.
+  */
+
+/*
+*  Copyright (c) 2022 Duc Doan <dtbpkmte at gmail.com>
+*
+*  The license and distribution terms for this file may be
+*  found in the file LICENSE in this distribution or at
+*  http://www.rtems.org/license/LICENSE.
+*/
+
+#ifndef LIBBSP_BSP_GPIO2_H
+#define LIBBSP_BSP_GPIO2_H
+
+#include <bsp.h>
+#include <rtems.h>
+
+/**
+  * Configure the maximum number of GPIO controllers used in
+  * a application.
+  *
+  * The macro CONFIGURE_GPIO_MAXIMUM_CONTROLLERS can be
+  * defined in application code. If it is not defined,
+  * it will default to BSP_GPIO_NUM_CONTROLLERS. If BSP's
+  * number of controllers is not defined, it will default
+  * to 1.
+  */
+#ifndef CONFIGURE_GPIO_MAXIMUM_CONTROLLERS
+
+#ifndef BSP_GPIO_NUM_CONTROLLERS
+#define CONFIGURE_GPIO_MAXIMUM_CONTROLLERS 1
+#else
+#define CONFIGURE_GPIO_MAXIMUM_CONTROLLERS BSP_GPIO_NUM_CONTROLLERS
+#endif /* BSP_GPIO_NUM_CONTROLLERS */
+
+#endif /* CONFIGURE_GPIO_MAXIMUM_CONTROLLERS */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+  * @name GPIO data structures
+  *
+  * @{
+  */
+
+/**
+  * @brief GPIO bit set and reset enumeration.
+  */
+typedef enum {
+    RTEMS_GPIO_PIN_RESET = 0,
+    RTEMS_GPIO_PIN_SET = 1
+} rtems_gpio_pin_state;
+
+/**
+  * @brief GPIO pin modes. 
+  */
+typedef enum {
+    RTEMS_GPIO_PINMODE_OUTPUT = 0,
+    RTEMS_GPIO_PINMODE_OUTPUT_PP = 0,
+    RTEMS_GPIO_PINMODE_OUTPUT_OD = 1,
+    RTEMS_GPIO_PINMODE_INPUT = 2,
+    RTEMS_GPIO_PINMODE_ANALOG = 3,
+    RTEMS_GPIO_PINMODE_BSP_SPECIFIC = 4
+} rtems_gpio_pin_mode;
+
+/**
+  * @brief GPIO pull resistor configuration. Defines pull-up or 
+  *        pull-down activation.
+  */
+typedef enum {
+    RTEMS_GPIO_NOPULL,
+    RTEMS_GPIO_PULLUP,
+    RTEMS_GPIO_PULLDOWN
+} rtems_gpio_pull;
+
+/**
+  * @brief Interrupt modes enumeration.
+  */
+typedef enum {
+    RTEMS_GPIO_INT_TRIG_NONE = 0,
+    RTEMS_GPIO_INT_TRIG_FALLING,
+    RTEMS_GPIO_INT_TRIG_RISING,
+    RTEMS_GPIO_INT_TRIG_BOTH_EDGES,
+    RTEMS_GPIO_INT_TRIG_LOW,
+    RTEMS_GPIO_INT_TRIG_HIGH
+} rtems_gpio_interrupt_trig;
+
+typedef struct rtems_gpio_handlers rtems_gpio_handlers;
+typedef struct rtems_gpio rtems_gpio;
+/**
+  * @brief Typedef of the function pointer of an ISR.
+  */
+typedef void (*rtems_gpio_isr)(void *);
+
+/**
+  * @brief Structure containing pointers to handlers of a
+  *        BSP/driver. Each BSP/driver must define its own 
+  *        handlers and create an object of this structure
+  *        with pointers to those handlers.
+  */
+struct rtems_gpio_handlers {
+    /**
+      * @brief This member is the pointer to an initialize handler. 
+      *
+      * This handler could be used to perform some set up steps for
+      * a GPIO object (which means a pin or a port).
+      */
+    rtems_status_code (*init)(rtems_gpio *);
+
+    /**
+      * @brief This member is the pointer to a deinitialize handler. 
+      *
+      * This handler could be used to deinitialize a GPIO object.
+      */
+    rtems_status_code (*deinit)(rtems_gpio *);
+
+    /**
+      * @brief This member is the pointer to a handler for setting 
+      *        pin mode. 
+      *
+      * Pin modes are from rtems_gpio_pin_mode enumeration.
+      */
+    rtems_status_code (*set_pin_mode)(rtems_gpio *, rtems_gpio_pin_mode);
+
+    /**
+      * @brief This member is the pointer to a handler for setting
+      *        pull resistor mode. 
+      *
+      * Pull resistor modes are from rtems_gpio_pull enumeration.
+      */
+    rtems_status_code (*set_pull)(rtems_gpio *, rtems_gpio_pull);
+
+    /**
+      * @brief This member is the pointer to a handler for configuring
+      *        interrupt of a pin. 
+      * 
+      * This handler should register ISR and its argument, interrupt
+      * trigger mode, and pull resister mode for the pin.
+      *
+      * @note Enabling interrupt should be done in enable_interrupt()
+      *       handler.
+      */
+    rtems_status_code (*configure_interrupt)(rtems_gpio *, rtems_gpio_isr, void *, rtems_gpio_interrupt_trig, rtems_gpio_pull);
+
+    /**
+      * @brief This member is the pointer to a handler for removing
+      *        interrupt settings of a pin. 
+      *
+      * Interrupt settings can be ISR address, pin configuration, etc.
+      */
+    rtems_status_code (*remove_interrupt)(rtems_gpio *);
+
+    /**
+      * @brief This member is the pointer to a handler for enabling
+      *        interrupt functionality of a pin.
+      */
+    rtems_status_code (*enable_interrupt)(rtems_gpio *);
+
+    /**
+      * @brief This member is the pointer to a handler for disabling
+      *        interrupt of a pin. 
+      */
+    rtems_status_code (*disable_interrupt)(rtems_gpio *);
+
+    /**
+      * @brief This member is the pointer to a handler for reading
+      *        the digital value of a pin. 
+      *
+      * The returned value should be in rtems_gpio_pin_state enum.
+      */
+    rtems_status_code (*read)(rtems_gpio *, rtems_gpio_pin_state *);
+
+    /**
+      * @brief This member is the pointer to a handler for writing 
+      *        a digital value to a pin. 
+      */
+    rtems_status_code (*write)(rtems_gpio *, rtems_gpio_pin_state);
+
+    /**
+      * @brief This member is the pointer to a handler for toggling
+      *        a pin. 
+      *
+      * It should change pin state from SET to RESET or vice versa.
+      */
+    rtems_status_code (*toggle)(rtems_gpio *);
+
+};
+
+/**
+  * @brief Structure representing a GPIO object. 
+  *
+  * BSP/drivers need to define their own GPIO structures with
+  * rtems_gpio being the first member.
+  */
+struct rtems_gpio {
+    /**
+      * @brief This member is a pointer to a structure containing
+      *        pointers to handlers of a GPIO controller.
+      */
+    const rtems_gpio_handlers *handlers;
+    /**
+      * @brief This member is a virtual pin number, counting from
+      *        0 (zero).
+      */
+    uint32_t virtual_pin;
+};
+
+/** @} */
+
+/**
+  * @name GPIO BSP functions
+  *
+  * BSP and drivers need to implement these.
+  *
+  * @{
+  */
+
+/**
+  * @brief Wrapper to perform all BSP controllers registering
+  *        with the GPIO manager.
+  *
+  * This function must be implemented by BSP. It should call
+  * rtems_gpio_register() to register each integrated GPIO
+  * controller.
+  */
+extern rtems_status_code bsp_gpio_register_controllers(
+    void
+);
+
+/** @} */
+
+
+/** @} */
+
+/**
+  * @name GPIO operations
+  *
+  * @{
+  */
+
+/**
+  * @brief Get the GPIO object containing information
+  *        about the specified pin.
+  * 
+  * This function maps the virtual pin to intermediate pin, 
+  * and pass to the BSP/driver-specific function to get a
+  * GPIO object.
+  *
+  * @note Warning: this function may use malloc(). When you 
+  * are done with the GPIO object, call rtems_gpio_destroy()
+  * to avoid memory leak.
+  *
+  * @param virt_pin The virtual pin number.
+  * @param[out] out The pointer to the pointer to the output
+  *             GPIO object.
+  *
+  * @retval RTEMS_SUCCESSFUL
+  * @retval RTEMS_UNSTISFIED if the virtual pin number
+  *         is invalid (i.e. out of range)
+  */
+extern rtems_status_code rtems_gpio_get(
+    uint32_t virt_pin,
+    rtems_gpio **out
+);
+
+/**
+  * @brief Destroy a GPIO object
+  *
+  * This function should be called on an GPIO object which is
+  * no longer used to avoid memory leak. Internally it can 
+  * use free().
+  *
+  * @param[in] base The pointer to the GPIO object.
+  *
+  * @retval RTEMS_SUCCESSFUL
+  * @retval RTEMS_UNSATISFIED
+  */
+extern rtems_status_code rtems_gpio_destroy(
+    rtems_gpio *base
+);
+
+/**
+  * @brief Registers a GPIO controller with GPIO manager.
+  *
+  * This function registers the pointer to BSP/driver-specific
+  * get_gpio() and destroy_gpio() functions. Those two functions
+  * are for creating and destroying GPIO objects. It also takes 
+  * the number of pins of each BSP/driver for mapping into a
+  * flat pin numbering system (virtual pin number).
+  *
+  * @param get_gpio The pointer to BSP/driver-specific get_gpio()
+  * @param destroy_gpio The pointer to BSP/driver-specific 
+  *        destroy_gpio()
+  * @param pin_count The number of GPIO pins in the controller
+  *
+  * @retval RTEMS_SUCCESSFUL Controller registered successfully
+  * @retval RTEMS_TOO_MANY if the maximum number of controllers are
+  *         already registered
+  */
+extern rtems_status_code rtems_gpio_register(
+    rtems_status_code (*get_gpio)(uint32_t, rtems_gpio **),
+    rtems_status_code (*destroy_gpio)(rtems_gpio *),
+    uint32_t pin_count
+);
+
+/**
+  * @brief Performs setup for GPIO functionality. 
+  *
+  * This function calls bsp_gpio_register_controllers() and may 
+  * perform additional initialization steps for GPIO functionality. 
+  * It should be called by users before all GPIO operations, ideally
+  * when the application starts.
+  */
+extern void rtems_gpio_begin(
+    void
+);
+
+/**
+  * @brief Initialize a GPIO object
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  * It can be used to initialize a GPIO object/pin/port. It should
+  * be called once for each pin, before all non-setup operations.
+  *
+  * @param[in] base The pointer to a GPIO object
+  *
+  * @retval RTEMS_SUCCESSFUL GPIO object initialized successfully.
+  * @retval RTEMS_UNSATISFIED Could not initialize a GPIO object.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_init(
+    rtems_gpio *base
+);
+
+/**
+  * @brief Deinitialize a GPIO object
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  * It can be used to deinitialize a GPIO object/pin/port. It 
+  * should be called once for each pin, before all non-setup 
+  * operations.
+  *
+  * @param[in] base The pointer to a GPIO object
+  *
+  * @retval RTEMS_SUCCESSFUL GPIO object deinitialized successfully.
+  * @retval RTEMS_UNSATISFIED Could not deinitialize a GPIO object.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_deinit(
+    rtems_gpio *base
+);
+
+/**
+  * @brief Sets the pin mode of a pin.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  * It can be used to set the pin mode for a pin. 
+  *
+  * @param[in] base The GPIO object to be configured.
+  * @param mode The pin mode from the enumeration rtems_gpio_pin_mode
+  *
+  * @retval RTEMS_SUCCESSFUL GPIO configured successfully.
+  * @retval RTEMS_UNSATISFIED Could not set the pin mode.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_set_pin_mode(
+    rtems_gpio *base, 
+    rtems_gpio_pin_mode mode
+);
+
+/**
+  * @brief Sets the pin's pull resistor configuration.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  * It can be used to set the pull resistor mode for a pin.
+  *
+  * @param[in] base The GPIO object to be configured.
+  * @param mode The pull mode from the enumeration rtems_gpio_pull
+  *
+  * @retval RTEMS_SUCCESSFUL GPIO configured successfully.
+  * @retval RTEMS_UNSATISFIED Could not set the pull resistor mode.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_set_pull(
+    rtems_gpio *base, 
+    rtems_gpio_pull pull
+);
+
+/**
+  * @brief Configure interrupt on a GPIO pin.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  * It can be used to set up a pin for interrupt mode.
+  *
+  * @note This only configures the interrupt but not enable it. Use
+  *       rtems_gpio_enable_interrupt() to actually enable interrupt.
+  *
+  * @param[in] base The GPIO object to be configured.
+  * @param isr The pointer to the ISR to be attached to this pin.
+  * @param[in] arg The pointer to the argument of the ISR.
+  * @param trig The trigger mode
+  * @param pull The pull resistor mode
+  *
+  * @retval RTEMS_SUCCESSFUL Interrupt configured successfully.
+  * @retval RTEMS_UNSATISFIED Could not configure interrupt.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_configure_interrupt(
+    rtems_gpio *base, 
+    rtems_gpio_isr isr,
+    void *arg,
+    rtems_gpio_interrupt_trig trig,
+    rtems_gpio_pull pull
+);
+
+/**
+  * @brief Remove interrupt settings for a pin.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  * It can be used to remove interrupt configuration of a pin like
+  * ISR, ISR argument, pin mode, etc.
+  *
+  * @note This only removes the interrupt but not disable it. Use
+  *       rtems_gpio_disable_interrupt() to actually disable 
+  *       interrupt.
+  *
+  * @param[in] base The GPIO object to be configured.
+  *
+  * @retval RTEMS_SUCCESSFUL Interrupt removed successfully.
+  * @retval RTEMS_UNSATISFIED Could not remove interrupt.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_remove_interrupt(
+    rtems_gpio *base
+);
+
+/**
+  * @brief Enable interrupt on a GPIO pin.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  *
+  * @note This function only enables the interrupt (e.g. the vector)
+  *       but not configure the pin. Use 
+  *       rtems_gpio_configure_interrupt() for pin configuration.
+  *
+  * @param[in] base The GPIO object to be configured.
+  *
+  * @retval RTEMS_SUCCESSFUL Interrupt enabled successfully.
+  * @retval RTEMS_UNSATISFIED Could not enable interrupt.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_enable_interrupt(
+    rtems_gpio *base
+);
+
+/**
+  * @brief Disable interrupt on a GPIO pin.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  *
+  * @note This function only disables the interrupt (e.g. the vector)
+  *       but not remove the pin's configurations. Use 
+  *       rtems_gpio_remove_interrupt() for the latter purpose.
+  *
+  * @param[in] base The GPIO object to be configured.
+  *
+  * @retval RTEMS_SUCCESSFUL Interrupt disabled successfully.
+  * @retval RTEMS_UNSATISFIED Could not disable interrupt.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_disable_interrupt(
+    rtems_gpio *base
+);
+
+/**
+  * @brief Writes a digital value to a pin. 
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  *
+  * @param[in] base The GPIO object that has information about the
+  *                  pin.
+  * @param value The state to be written to the pin.
+  *
+  * @retval RTEMS_SUCCESSFUL Pin successfully written.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_write(
+    rtems_gpio *base, 
+    rtems_gpio_pin_state value
+);
+
+/**
+  * @brief Reads the digital value of a pin. 
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  *
+  * @param[in] base The GPIO object that has information about the
+  *                  pin.
+  *
+  * @param[out] value The state of the pin.
+  *
+  * @retval RTEMS_SUCCESSFUL Pin succesfully read.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_read(
+    rtems_gpio *base, 
+    rtems_gpio_pin_state *value
+);
+
+/**
+  * @brief Toggles the state of a GPIO pin.
+  *
+  * This function calls the registered BSP/driver-specific handler.
+  *
+  * @param[in] base The GPIO object that has information about the
+  *                  pin.
+  *
+  * @retval RTEMS_SUCCESSFUL Pin successfully toggled.
+  * @retval @see BSP/driver-specific function for other return codes.
+  */
+extern rtems_status_code rtems_gpio_toggle(
+    rtems_gpio *base
+);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_BSP_GPIO2_H */
diff --git a/bsps/shared/dev/gpio/gpio.c b/bsps/shared/dev/gpio/gpio.c
new file mode 100644
index 0000000000..f3aaf0f597
--- /dev/null
+++ b/bsps/shared/dev/gpio/gpio.c
@@ -0,0 +1,196 @@
+/**
+ * @file
+ *
+ * @ingroup rtems_gpio
+ *
+ * @brief RTEMS GPIO API implementation.
+ */
+
+/*
+ *  Copyright (c) 2022 Duc Doan <dtbpkmte at gmail.com>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp/gpio2.h>
+#include <rtems/sysinit.h>
+
+/**
+  * @brief An array to store all registered GPIO controllers.
+  */
+static rtems_status_code (*get_gpio_table[CONFIGURE_GPIO_MAXIMUM_CONTROLLERS])(uint32_t, rtems_gpio **);
+
+/**
+  * @brief An array to store all registered GPIO controllers.
+  */
+static rtems_status_code (*destroy_gpio_table[CONFIGURE_GPIO_MAXIMUM_CONTROLLERS])(rtems_gpio *);
+
+/**
+  * @brief An array to store the boundaries of pin index of 
+  *        GPIO controllers.
+  *
+  * Example with 2 16-pin controllers and 1 32-pin controller,
+  * the pin_map will be:
+  * { 0, 16, 32, 64}
+  * Value 0 is always at index 0 for convenience of calculation.
+  * The length of this array is always 1+(number of controllers).
+  */
+static uint32_t pin_map[CONFIGURE_GPIO_MAXIMUM_CONTROLLERS+1] = {0};
+
+/**
+  * @brief The number of controllers registered.
+  */
+static uint32_t num_ctrl = 0;
+
+void rtems_gpio_begin(
+    void
+)
+{
+    bsp_gpio_register_controllers();   
+}
+
+rtems_status_code rtems_gpio_register(
+    rtems_status_code (*get_gpio)(uint32_t, rtems_gpio **),
+    rtems_status_code (*destroy_gpio)(rtems_gpio *),
+    uint32_t pin_count
+) 
+{
+//    rtems_interrupt_level level;
+
+    if (num_ctrl == CONFIGURE_GPIO_MAXIMUM_CONTROLLERS)
+        return RTEMS_TOO_MANY;
+
+//    rtems_interrupt_disable(level);
+    get_gpio_table[num_ctrl] = get_gpio;
+    destroy_gpio_table[num_ctrl] = destroy_gpio;
+    pin_map[num_ctrl+1] = pin_map[num_ctrl] + pin_count;
+    ++num_ctrl;
+//    rtems_interrupt_enable(level);
+
+    return RTEMS_SUCCESSFUL;
+}
+
+rtems_status_code rtems_gpio_get(
+    uint32_t virt_pin,
+    rtems_gpio **out
+) 
+{
+    uint32_t i, pin;
+    // TODO: binary search
+    for (i = 1; i <= num_ctrl; ++i) {
+        if (virt_pin < pin_map[i]) {
+            pin = virt_pin - pin_map[i-1];
+            break;
+        }
+    }
+    if (i > num_ctrl)
+        return RTEMS_UNSATISFIED;
+
+    rtems_status_code sc = (*get_gpio_table[i-1])(pin, out);
+    if (sc == RTEMS_SUCCESSFUL) {
+        (*out)->virtual_pin = virt_pin;
+    }
+    return sc;
+}
+
+rtems_status_code rtems_gpio_destroy(
+    rtems_gpio *base
+)
+{
+    uint32_t i;
+    // TODO: binary search
+    for (i = 1; i <= num_ctrl; ++i) {
+        if (base->virtual_pin < pin_map[i]) {
+            return (*destroy_gpio_table[i-1])(base);
+        }
+    }
+    return RTEMS_UNSATISFIED;
+}
+
+rtems_status_code rtems_gpio_init(
+    rtems_gpio *base
+)
+{
+    return base->handlers->init(base);
+}
+
+rtems_status_code rtems_gpio_deinit(
+    rtems_gpio *base
+)
+{
+    return base->handlers->deinit(base);
+}
+
+rtems_status_code rtems_gpio_set_pin_mode(
+    rtems_gpio *base, 
+    rtems_gpio_pin_mode mode
+) 
+{
+    return base->handlers->set_pin_mode(base, mode);
+}
+
+rtems_status_code rtems_gpio_set_pull(
+    rtems_gpio *base, 
+    rtems_gpio_pull pull
+) 
+{
+    return base->handlers->set_pull(base, pull);
+}
+
+rtems_status_code rtems_gpio_configure_interrupt(
+    rtems_gpio *base, 
+    rtems_gpio_isr isr,
+    void *arg,
+    rtems_gpio_interrupt_trig trig,
+    rtems_gpio_pull pull
+) 
+{
+    return base->handlers->configure_interrupt(base, isr, arg, trig, pull);
+}
+
+rtems_status_code rtems_gpio_remove_interrupt(
+    rtems_gpio *base
+)
+{
+    return base->handlers->remove_interrupt(base);
+}
+
+rtems_status_code rtems_gpio_enable_interrupt(
+    rtems_gpio *base
+)
+{
+    return base->handlers->enable_interrupt(base);
+}
+
+rtems_status_code rtems_gpio_disable_interrupt(
+    rtems_gpio *base
+)
+{
+    return base->handlers->disable_interrupt(base);
+}
+
+rtems_status_code rtems_gpio_write(
+    rtems_gpio *base, 
+    rtems_gpio_pin_state value
+) 
+{
+    return base->handlers->write(base, value);
+}
+
+rtems_status_code rtems_gpio_read(
+    rtems_gpio *base, 
+    rtems_gpio_pin_state *value
+) 
+{
+    return base->handlers->read(base, value);
+}
+
+rtems_status_code rtems_gpio_toggle(
+    rtems_gpio *base
+) 
+{
+    return base->handlers->toggle(base);
+}
+
diff --git a/spec/build/bsps/obj.yml b/spec/build/bsps/obj.yml
index ce05c11c0e..a734c1a1f4 100644
--- a/spec/build/bsps/obj.yml
+++ b/spec/build/bsps/obj.yml
@@ -16,7 +16,6 @@ install:
   - bsps/include/bsp/default-initial-extension.h
   - bsps/include/bsp/fatal.h
   - bsps/include/bsp/fdt.h
-  - bsps/include/bsp/gpio.h
   - bsps/include/bsp/gpio2.h
   - bsps/include/bsp/irq-default.h
   - bsps/include/bsp/irq-generic.h
@@ -71,6 +70,7 @@ links:
 - role: build-dependency
   uid: objnosmp
 source:
+- bsps/shared/dev/gpio/gpio.c
 - bsps/shared/dev/display/disp_hcms29xx.c
 - bsps/shared/dev/display/font_hcms29xx.c
 - bsps/shared/dev/i2c/i2c-2b-eeprom.c
-- 
2.36.1



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