From 760e02977fdfd23427a7055a3969c032f7e2e50b Mon Sep 17 00:00:00 2001
From: raiden00pl <raiden00@railab.me>
Date: Sat, 11 Mar 2023 11:03:56 +0100
Subject: [PATCH] boards/nrf5340-dk: add procfs support

---
 boards/arm/nrf53/nrf5340-dk/src/nrf5340-dk.h    | 12 ++++++++++++
 boards/arm/nrf53/nrf5340-dk/src/nrf53_bringup.c | 13 +++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/boards/arm/nrf53/nrf5340-dk/src/nrf5340-dk.h b/boards/arm/nrf53/nrf5340-dk/src/nrf5340-dk.h
index 34ce71e3aa4..edbe475d578 100644
--- a/boards/arm/nrf53/nrf5340-dk/src/nrf5340-dk.h
+++ b/boards/arm/nrf53/nrf5340-dk/src/nrf5340-dk.h
@@ -34,6 +34,18 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+/* Configuration ************************************************************/
+
+/* procfs File System */
+
+#ifdef CONFIG_FS_PROCFS
+#  ifdef CONFIG_NSH_PROC_MOUNTPOINT
+#    define NRF53_PROCFS_MOUNTPOINT CONFIG_NSH_PROC_MOUNTPOINT
+#  else
+#    define NRF53_PROCFS_MOUNTPOINT "/proc"
+#  endif
+#endif
+
 /* LED definitions **********************************************************/
 
 /* Definitions to configure LED GPIO as outputs */
diff --git a/boards/arm/nrf53/nrf5340-dk/src/nrf53_bringup.c b/boards/arm/nrf53/nrf5340-dk/src/nrf53_bringup.c
index 147b811912b..fb098425b0b 100644
--- a/boards/arm/nrf53/nrf5340-dk/src/nrf53_bringup.c
+++ b/boards/arm/nrf53/nrf5340-dk/src/nrf53_bringup.c
@@ -27,6 +27,8 @@
 #include <sys/types.h>
 #include <syslog.h>
 
+#include <nuttx/fs/fs.h>
+
 #ifdef CONFIG_USERLED
 #  include <nuttx/leds/userled.h>
 #endif
@@ -73,6 +75,17 @@ int nrf53_bringup(void)
 {
   int ret;
 
+#ifdef CONFIG_FS_PROCFS
+  /* Mount the procfs file system */
+
+  ret = nx_mount(NULL, NRF53_PROCFS_MOUNTPOINT, "procfs", 0, NULL);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to mount the PROC filesystem: %d\n",  ret);
+    }
+#endif /* CONFIG_FS_PROCFS */
+
 #ifdef CONFIG_USERLED
   /* Register the LED driver */