From 64baacfbbf74b679288240ae522f5e2063fda2e2 Mon Sep 17 00:00:00 2001
From: Guillaume Revaillot <revaillot@archos.com>
Date: Tue, 5 Feb 2019 14:34:08 +0100
Subject: [PATCH] rng: add irq enable/disable helper.

---
 include/libopencm3/stm32/common/rng_common_v1.h |  2 ++
 lib/stm32/common/rng_common_v1.c                | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/libopencm3/stm32/common/rng_common_v1.h b/include/libopencm3/stm32/common/rng_common_v1.h
index 1f226d77..66f725a0 100644
--- a/include/libopencm3/stm32/common/rng_common_v1.h
+++ b/include/libopencm3/stm32/common/rng_common_v1.h
@@ -75,6 +75,8 @@ BEGIN_DECLS
 
 void rng_enable(void);
 void rng_disable(void);
+void rng_interrupt_enable(void);
+void rng_interrupt_disable(void);
 bool rng_get_random(uint32_t *rand_nr);
 uint32_t rng_get_random_blocking(void);
 
diff --git a/lib/stm32/common/rng_common_v1.c b/lib/stm32/common/rng_common_v1.c
index e26b6880..d9955c20 100644
--- a/lib/stm32/common/rng_common_v1.c
+++ b/lib/stm32/common/rng_common_v1.c
@@ -44,6 +44,20 @@ void rng_enable(void)
     RNG_CR |= RNG_CR_RNGEN;
 }
 
+/** Enable the Random Number Generator error interrupt.
+*/
+void rng_interrupt_enable(void)
+{
+    RNG_CR |= RNG_CR_IE;
+}
+
+/** Disable the Random Number Generator error interrupt.
+*/
+void rng_interrupt_disable(void)
+{
+    RNG_CR &= ~RNG_CR_IE;
+}
+
 /** Randomizes a number (non-blocking).
  * Can fail if a clock error or seed error is detected. Consult the Reference
  * Manual, but "try again", potentially after resetting the peripheral