drivers: net: sam_gmac: deprecate the 'mac-eeprom' option

Deprecate the 'ETH_SAM_GMAC_MAC_I2C_EEPROM' for the 'mac-eeprom' option,
Add limitation to use it only there's only one activated GMAC instance.

Signed-off-by: Tony Han <[email protected]>

Author: TonyHan11

drivers/ethernet/Kconfig.sam_gmac

@@ -74,9 +74,10 @@ config ETH_SAM_GMAC_BUF_RX_COUNT
 	  and the other being processed by the higher layer networking stack.
 
 config ETH_SAM_GMAC_MAC_I2C_EEPROM
-	bool "Read from an I2C EEPROM"
+	bool "Read from an I2C EEPROM [DEPRECATED]"
+	select DEPRECATED
 	help
-	  Read MAC address from an I2C EEPROM.
+	  Read MAC address from an I2C EEPROM. This option is deprecated.
 
 if ETH_SAM_GMAC_MAC_I2C_EEPROM
 

drivers/ethernet/eth_sam_gmac.c

@@ -133,6 +133,10 @@ static inline void dcache_clean(uint32_t addr, uint32_t size)
 #endif
 #endif /* !CONFIG_NET_TEST */
 
+BUILD_ASSERT(!(DT_ANY_INST_HAS_PROP_STATUS_OKAY(mac_eeprom) &&
+	       (DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) > 1)),
+	     "Only support one activated instance get MAC address from EEPROM");
+
 /* RX descriptors list */
 #define DEFN_RX_DESC(n)									\
 		static struct gmac_desc rx_desc##n##_que[PRIORITY_QUEUE_RX_DESC_COUNT]	\