[GitHub] [incubator-nuttx] microhobby commented on a change in pull request #3857: boards: rp2040: Add user gpio driver

[GitBox <gi...@apache.org>]

microhobby commented on a change in pull request #3857:
URL: https://github.com/apache/incubator-nuttx/pull/3857#discussion_r645998351



##########
File path: boards/arm/rp2040/raspberrypi-pico/src/rp2040_gpio.c
##########
@@ -0,0 +1,398 @@
+/****************************************************************************
+ * boards/arm/rp2040/raspberrypi-pico/src/rp2040_gpio.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <syslog.h>
+#include <nuttx/irq.h>
+#include <arch/irq.h>
+#include <debug.h>
+
+#include <nuttx/ioexpander/gpio.h>
+
+#include <arch/board/board.h>
+
+#include "arm_arch.h"
+#include "chip.h"
+#include "rp2040_gpio.h"
+
+#if defined(CONFIG_DEV_GPIO) && !defined(CONFIG_GPIO_LOWER_HALF)
+
+/* Output pins. GPIO25 is onboard LED any other outputs could be used.
+ */
+
+#define GPIO_OUT1     25
+
+/* Input pins.
+ */
+
+#define GPIO_IN1      6
+
+/* Interrupt pins.
+ */
+
+#define GPIO_IRQPIN1  14
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct rp2040gpio_dev_s
+{
+  struct gpio_dev_s gpio;
+  uint8_t id;
+};
+
+struct rp2040gpint_dev_s
+{
+  struct rp2040gpio_dev_s rp2040gpio;
+  pin_interrupt_t callback;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+#if BOARD_NGPIOOUT > 0
+static int gpout_read(FAR struct gpio_dev_s *dev, FAR bool *value);
+static int gpout_write(FAR struct gpio_dev_s *dev, bool value);
+#endif
+
+#if BOARD_NGPIOIN > 0
+static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value);
+#endif
+
+#if BOARD_NGPIOINT > 0
+static int gpint_read(FAR struct gpio_dev_s *dev, FAR bool *value);
+static int gpint_attach(FAR struct gpio_dev_s *dev,
+                        pin_interrupt_t callback);
+static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if BOARD_NGPIOOUT > 0
+static const struct gpio_operations_s gpout_ops =
+{
+  .go_read   = gpout_read,
+  .go_write  = gpout_write,
+  .go_attach = NULL,
+  .go_enable = NULL,
+};
+
+/* This array maps the GPIO pins used as OUTPUT */
+
+static const uint32_t g_gpiooutputs[BOARD_NGPIOOUT] =
+{
+  GPIO_OUT1,
+  GPIO_OUT2,
+  GPIO_OUT3,
+  GPIO_OUT4,
+  GPIO_OUT5

Review comment:
       oops, this come from the previous application. BTW there is a way to add it by configuration (let say like device trees from Linux?)




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