From 226e1b5daf22fb5b60d8274c047d14f514facb45 Mon Sep 17 00:00:00 2001
From: Francisco Molina <femolina@uc.cl>
Date: Thu, 19 Mar 2020 16:17:17 +0100
Subject: [PATCH] cpu/cc2538: fix GPT3 timer IRQ definition

---
 cpu/cc2538/periph/timer.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/cpu/cc2538/periph/timer.c b/cpu/cc2538/periph/timer.c
index 6dfc377764..9a911e00ad 100644
--- a/cpu/cc2538/periph/timer.c
+++ b/cpu/cc2538/periph/timer.c
@@ -67,8 +67,21 @@ static inline void _irq_enable(tim_t tim)
     DEBUG("%s(%u)\n", __FUNCTION__, tim);
 
     if (tim < TIMER_NUMOF) {
-        IRQn_Type irqn = GPTIMER_0A_IRQn + (2 * tim);
-
+        IRQn_Type irqn;
+        switch (tim) {
+            case 0:
+                irqn = GPTIMER_0A_IRQn;
+                break;
+            case 1:
+                irqn = GPTIMER_1A_IRQn;
+                break;
+            case 2:
+                irqn = GPTIMER_2A_IRQn;
+                break;
+            case 3:
+                irqn = GPTIMER_3A_IRQn;
+                break;
+        }
         NVIC_SetPriority(irqn, TIMER_IRQ_PRIO);
         NVIC_EnableIRQ(irqn);