From dc67fbd2eeac38f1aad09068f82dc09187a8f25e Mon Sep 17 00:00:00 2001
From: Michael Ossmann <mike@ossmann.com>
Date: Mon, 3 Oct 2022 22:00:16 -0400
Subject: [PATCH] h1r9: fix Opera Cake time mode compatibility

TIMER3 match register 3 was interfering with SCT, fixed by turning off
all ORing of timer outputs with SCT outputs.
---
 firmware/common/clkin.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/firmware/common/clkin.c b/firmware/common/clkin.c
index 080d02d0..1d8e7511 100644
--- a/firmware/common/clkin.c
+++ b/firmware/common/clkin.c
@@ -23,6 +23,7 @@
 #include <libopencm3/lpc43xx/timer.h>
 #include <libopencm3/lpc43xx/scu.h>
 #include <libopencm3/lpc43xx/gima.h>
+#include <libopencm3/lpc43xx/creg.h>
 #include <stdint.h>
 
 #define CLOCK_CYCLES_1_MS     (204000)
@@ -56,6 +57,7 @@ void clkin_detect_init(void)
 		(TIMER_EMR_EMC_TOGGLE << TIMER_EMR_EMC3_SHIFT);
 	TIMER3_MR3 = MEASUREMENT_CYCLES;
 	TIMER3_MR0 = MEASUREMENT_CYCLES;
+	CREG_CREG6 |= CREG_CREG6_CTOUTCTRL;
 
 	/* Timer0 counts CLKIN */
 	timer_set_prescaler(TIMER0, 0);