drivers: ethernet: stm32hal: Fixes source address control

The default configuration for all STM32 microcontrollers in HAL is
to replace the ehternet MAC address with the address configured in
replace address zero. In "modules/hal", Grep for:

macDefaultConf.SourceAddrControl = ETH_SOURCEADDRESS_REPLACE_ADDR0;

But this is a bad thing for bridging. Since Zephyr ethernet LL code
always writes the source address, this patch has no impact on normal
operation. And has the benefit of maintaining the source MAC address
of bridged packets.

Signed-off-by: Marcelo Roberto Jimenez <marcelo.jimenez@gmail.com>

Author: mrjimenez

drivers/ethernet/eth_stm32_hal_v1.c

@@ -235,6 +235,10 @@ void eth_stm32_set_mac_config(const struct device *dev, struct phy_link_state *s
 
 	heth->Init.Speed = PHY_LINK_IS_SPEED_100M(state->speed) ? ETH_SPEED_100M : ETH_SPEED_10M;
 
+	/* The default configuration is ETH_SOURCEADDRESS_REPLACE_ADDR0,
+	 * which is bad for bridging. */
+	mac_config.SourceAddrControl = ETH_SOURCEADDRESS_DISABLE;
+
 	hal_ret = HAL_ETH_ConfigMAC(heth, NULL);
 	if (hal_ret != HAL_OK) {
 		LOG_ERR("HAL_ETH_ConfigMAC: failed: %d", hal_ret);

drivers/ethernet/eth_stm32_hal_v2.c

@@ -653,6 +653,10 @@ void eth_stm32_set_mac_config(const struct device *dev, struct phy_link_state *s
 		? ETH_SPEED_100M
 		: ETH_SPEED_10M;
 
+	/* The default configuration is ETH_SOURCEADDRESS_REPLACE_ADDR0,
+	 * which is bad for bridging. */
+	mac_config.SourceAddrControl = ETH_SOURCEADDRESS_DISABLE;
+
 	hal_ret = HAL_ETH_SetMACConfig(heth, &mac_config);
 	if (hal_ret != HAL_OK) {
 		LOG_ERR("HAL_ETH_SetMACConfig failed: %d", hal_ret);