From c24fb242efbbf956a4be4d98d2a6c53c03b21324 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benpicco@googlemail.com>
Date: Wed, 29 Jan 2020 19:47:16 +0100
Subject: [PATCH] cpu/lpc2387: rtc: set rtc callback arg

`_cb_arg` was never set, it was simply ignored in `rtc_set_alarm()`.
The fix is trivial: just set `_cb_arg` to the assigned argument.
---
 cpu/lpc2387/periph/rtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpu/lpc2387/periph/rtc.c b/cpu/lpc2387/periph/rtc.c
index 165cc1edc9..e17f24291c 100644
--- a/cpu/lpc2387/periph/rtc.c
+++ b/cpu/lpc2387/periph/rtc.c
@@ -114,7 +114,6 @@ int rtc_get_time(struct tm *localt)
 
 int rtc_set_alarm(struct tm *localt, rtc_alarm_cb_t cb, void *arg)
 {
-    (void) arg;
     if (localt != NULL) {
         /* normalize input */
         rtc_tm_normalize(localt);
@@ -132,6 +131,7 @@ int rtc_set_alarm(struct tm *localt, rtc_alarm_cb_t cb, void *arg)
               RTC_ALDOM, RTC_ALMON, RTC_ALYEAR, RTC_ALHOUR, RTC_ALMIN, RTC_ALSEC);
 
         _cb = cb;
+        _cb_arg = arg;
         return 0;
     }
     else if (cb == NULL) {