From 559272d9bdcc153ec22199e21ac33631de0bd013 Mon Sep 17 00:00:00 2001
From: Yuya Hamamachi <yuya.hamamachi.sx@renesas.com>
Date: Fri, 24 Mar 2023 16:59:36 +0900
Subject: [PATCH 20/27] WIP: Fix timer interupt is 4x slower than expected

This fix is based on the real measurement.

Signed-off-by: Yuya Hamamachi <yuya.hamamachi.sx@renesas.com>
---
 machines/renesas/tpl_machine_renesas.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/machines/renesas/tpl_machine_renesas.c b/machines/renesas/tpl_machine_renesas.c
index 349947c..41dc7a7 100644
--- a/machines/renesas/tpl_machine_renesas.c
+++ b/machines/renesas/tpl_machine_renesas.c
@@ -9,7 +9,8 @@ VAR (tpl_context, OS_VAR) idle_task_context;
 VAR(tpl_stack_word, OS_VAR) idle_stack[IDLE_STACK_SIZE/sizeof(tpl_stack_word)];
 
 #define SYSTICK_HZ		((u32) 80000000) /* 80MHz : is it the correct frequency? */
-#define TICKS_FOR_10MS	SYSTICK_HZ / 100
+#define PRESCALER		(0)
+#define TICKS_FOR_10MS		SYSTICK_HZ / (1<<PRESCALER) / 100 / 4
 
 static void stop_systick()
 {
@@ -35,7 +36,7 @@ static void init_systick()
 	stop_systick();
 
 	/* clear TAUJnPRS0 to use PCLK clock for CK0 (ie diviser = 2^0) */
-	TAUJ1.TPS.BIT.PRS0 = 0;
+	TAUJ1.TPS.BIT.PRS0 = PRESCALER;
 
 	/* set systick as interval timer */
 	TAUJ1.CMOR0.BIT.MD = 0;
-- 
2.34.1