From 4fbca251bc6f1996c1f6bfad5a5264b029639d2e Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Mon, 16 Dec 2019 19:45:57 +0100
Subject: [PATCH] boards/same54-xpro: use 48 MHz GCLK6 for I2C

We can't run I2C off the 120 MHz main clock as the availiable dividers are too small.
Use the 48 MHz GCLK 6 instead which offers an appropriate frequency.

fixes #12037
---
 boards/same54-xpro/include/periph_conf.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boards/same54-xpro/include/periph_conf.h b/boards/same54-xpro/include/periph_conf.h
index e6093a99ff..a4c3cf7ffa 100644
--- a/boards/same54-xpro/include/periph_conf.h
+++ b/boards/same54-xpro/include/periph_conf.h
@@ -131,7 +131,7 @@ static const i2c_conf_t i2c_config[] = {
         .scl_pin  = GPIO_PIN(PD, 9),
         .sda_pin  = GPIO_PIN(PD, 8),
         .mux      = GPIO_MUX_C,
-        .gclk_src = 0,
+        .gclk_src = 6,
         .flags    = I2C_FLAG_NONE
     }
 };