From 385d2600699c5d210bd78bca9ae4e22d8f08afc4 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Wed, 31 May 2023 14:08:50 +0200
Subject: [PATCH] cpu/sam0_eth: disable PHY when MAC is sleeping

 - idle         13.88 mA
 - MAC off      11.48 mA
 - MAC+PHY off  10.73 mA
---
 cpu/sam0_common/periph/eth.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cpu/sam0_common/periph/eth.c b/cpu/sam0_common/periph/eth.c
index a69c67904f..adbe740d2f 100644
--- a/cpu/sam0_common/periph/eth.c
+++ b/cpu/sam0_common/periph/eth.c
@@ -124,11 +124,17 @@ void sam0_eth_poweron(void)
 {
     _enable_clock();
     sam0_clear_rx_buffers();
+
+    /* enable PHY */
+    gpio_set(sam_gmac_config[0].rst_pin);
     _is_sleeping = false;
 }
 
 void sam0_eth_poweroff(void)
 {
+    /* disable PHY */
+    gpio_clear(sam_gmac_config[0].rst_pin);
+
     _is_sleeping = true;
     _disable_clock();
 }