From 23e8729d3e256a38ae4bbe68c8aa66a40e31e2e8 Mon Sep 17 00:00:00 2001
From: Glenn Ruben Bakke <glennbakke@gmail.com>
Date: Wed, 9 Dec 2020 21:01:28 +0100
Subject: [PATCH] nrf/mphalport: Add dummy function for mp_hal_time_ns().

extmod/vfs_lfs.c needs to resolve `mp_hal_time_ns()` in order to calculate
a timestamp from 1970 epoch.  A wall clock is not available in the nrf
port, hence the function is implemented to resolve compilation linkage
error.  The function always return 0.
---
 ports/nrf/mphalport.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ports/nrf/mphalport.c b/ports/nrf/mphalport.c
index b8e4c2e4d8..8ffb256018 100644
--- a/ports/nrf/mphalport.c
+++ b/ports/nrf/mphalport.c
@@ -150,6 +150,10 @@ mp_uint_t mp_hal_ticks_ms(void) {
 
 #endif
 
+uint64_t mp_hal_time_ns(void) {
+    return 0;
+}
+
 // this table converts from HAL_StatusTypeDef to POSIX errno
 const byte mp_hal_status_to_errno_table[4] = {
     [HAL_OK] = 0,