From a0ff6f9fa682c1168f7f4ddecab6b2ce1d884c55 Mon Sep 17 00:00:00 2001
From: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
Date: Mon, 13 Jun 2022 09:44:49 +0900
Subject: [PATCH] arch: k210: Add a workaround for clock stabilization

Summary:
- I noticed that sometimes uart shows nothing on the maix-bit board.
- This commit adds a workaround to avoid such the issue

Impact:
- k210 only

Testing:
- Tested with maix-bit

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
---
 arch/risc-v/src/k210/k210_clockconfig.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/risc-v/src/k210/k210_clockconfig.c b/arch/risc-v/src/k210/k210_clockconfig.c
index 3da5b18fb9..5317e24d7e 100644
--- a/arch/risc-v/src/k210/k210_clockconfig.c
+++ b/arch/risc-v/src/k210/k210_clockconfig.c
@@ -105,5 +105,9 @@ void k210_clockconfig(void)
 
       g_cpu_clock = OSC_FREQ;
     }
+
+  /* Workaround for stabilization */
+
+  up_udelay(1);
 #endif
 }