boards/risc-v: GPIO support on esp32p4-tab5

Documentation/platforms/risc-v/esp32p4/boards/esp32p4-tab5/index.rst

@@ -143,6 +143,24 @@ is printed because the upstream default targets rev >= 3.0.
 Configurations
 ==============
 
+gpio
+----
+
+This is a test for the GPIO driver. It uses GPIO2 as output and
+GPIO3 as an interrupt pin.
+
+At the nsh, we can turn the outputs on and off with the following::
+
+    nsh> gpio -o 1 /dev/gpio0
+    nsh> gpio -o 0 /dev/gpio0
+
+We can use the interrupt pin to send a signal when the interrupt fires::
+
+    nsh> gpio -w 1 /dev/gpio1
+
+The pin is configured as a rising edge interrupt, so after issuing the
+above command, connect it to 3.3V.
+
 lvgl_demo
 ---------
 

boards/risc-v/esp32p4/esp32p4-tab5/include/board.h

@@ -90,6 +90,19 @@
 #  define TAB5_MIPI_DSI_LANE_BITRATE_MBPS  965
 #endif
 
+/* GPIOs available on the M5-Bus connector */
+
+#define TAB5_GPIO_MBUS_3  3
+#define TAB5_GPIO_MBUS_2  2
+#define TAB5_GPIO_MBUS_47 47
+
+#define TAB5_GPIO_MBUS_16 16
+#define TAB5_GPIO_MBUS_45 45
+#define TAB5_GPIO_MBUS_4  4
+#define TAB5_GPIO_MBUS_48 48
+#define TAB5_GPIO_MBUS_35 35
+#define TAB5_GPIO_MBUS_51 51
+
 /* Touch - ST7121/ST7123 TDDI @0x55 (NOT implemented; INT GPIO23).  Older
  * ILI9881 units used GT911 @0x14 on the same INT pin.
  */

boards/risc-v/esp32p4/esp32p4-tab5/src/Make.defs

@@ -55,6 +55,10 @@ ifeq ($(CONFIG_BOARDCTL),y)
   endif
 endif
 
+ifeq ($(CONFIG_DEV_GPIO),y)
+  CSRCS += esp32p4_gpio.c
+endif
+
 DEPPATH += --dep-path board
 VPATH += :board
 CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board

boards/risc-v/esp32p4/esp32p4-tab5/src/esp32p4-tab5.h

@@ -63,6 +63,24 @@
 
 int esp_bringup(void);
 
+/****************************************************************************
+ * Name: esp_gpio_init
+ *
+ * Description:
+ *   Configure the GPIO driver.
+ *
+ * Input Parameters:
+ *   None.
+ *
+ * Returned Value:
+ *   Zero (OK).
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_DEV_GPIO
+int esp_gpio_init(void);
+#endif
+
 #ifdef CONFIG_ESP32P4_TAB5_LCD_POWER
 
 /****************************************************************************

boards/risc-v/esp32p4/esp32p4-tab5/src/esp32p4_bringup.c

@@ -109,6 +109,16 @@ int esp_bringup(void)
     }
 #endif
 
+#ifdef CONFIG_DEV_GPIO
+  /* Configure the GPIO driver */
+
+  ret = esp_gpio_init();
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize GPIO driver: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_ESP32P4_TAB5_IOEXPANDER
   /* Initialize the IO expanders */