drivers: ethernet: add support for microchip lan9250

This PR adds support for LAN9250 spi ethernet controller.
This driver is tested on the Mikroe ETH Click 3
https://www.mikroe.com/eth-3-click

Signed-off-by: Mario Paja <[email protected]>

drivers/ethernet/CMakeLists.txt

@@ -42,6 +42,7 @@ zephyr_library_sources_ifdef(CONFIG_ETH_LAN865X	        eth_lan865x.c oa_tc6.c)
 zephyr_library_sources_ifdef(CONFIG_ETH_XMC4XXX		eth_xmc4xxx.c)
 zephyr_library_sources_ifdef(CONFIG_ETH_TEST		eth_test.c)
 zephyr_library_sources_ifdef(CONFIG_ETH_RENESAS_RA     eth_renesas_ra.c)
+zephyr_library_sources_ifdef(CONFIG_ETH_LAN9250    eth_lan9250.c)
 
 if(CONFIG_ETH_NXP_S32_NETC)
   zephyr_library_sources(eth_nxp_s32_netc.c)

drivers/ethernet/Kconfig

@@ -75,6 +75,7 @@ source "drivers/ethernet/Kconfig.numaker"
 source "drivers/ethernet/Kconfig.lan865x"
 source "drivers/ethernet/Kconfig.xmc4xxx"
 source "drivers/ethernet/Kconfig.test"
+source "drivers/ethernet/Kconfig.lan9250"
 
 source "drivers/ethernet/eth_nxp_enet_qos/Kconfig"
 

drivers/ethernet/Kconfig.lan9250

@@ -0,0 +1,40 @@
+# LAN9250 Stand-alone Ethernet Controller configuration options
+
+# Copyright (c) 2024 Mario Paja
+# SPDX-License-Identifier: Apache-2.0
+
+
+menuconfig ETH_LAN9250
+	bool "LAN9250 Ethernet Controller"
+	default y
+	depends on DT_HAS_MICROCHIP_LAN9250_ENABLED
+	select SPI
+	help
+	  LAN9250 Stand-Alone Ethernet Controller
+	  with SPI Interface
+
+if ETH_LAN9250
+
+config ETH_LAN9250_RX_THREAD_STACK_SIZE
+	int "Stack size for internal incoming packet handler"
+	default 800
+	help
+	  Size of the stack used for internal thread which is ran for
+	  incoming packet processing.
+
+config ETH_LAN9250_RX_THREAD_PRIO
+	int "Priority for internal incoming packet handler"
+	default 2
+	help
+	  Priority level for internal thread which is ran for incoming
+	  packet processing.
+
+config ETH_LAN9250_BUF_ALLOC_TIMEOUT
+	int "Network buffer allocation timeout"
+	default 100
+	help
+	  Given timeout in milliseconds. Maximum amount of time
+	  that the driver will wait from the IP stack to get
+	  a memory buffer before the Ethernet frame is dropped.
+
+endif