drivers: net: sam_gmac: update get MAC address for multi instances support

Add variables to configuration struct for getting MAC address settings from device tree. Update generate_mac() to get proper MAC address for each GAMC interface. Signed-off-by: Tony Han <tony.han@microchip.com>

Author: TonyHan11

drivers/ethernet/eth_sam_gmac.c

@@ -1660,12 +1660,10 @@ static int eth_initialize(const struct device *dev)
 return retval;
 }
 
-#if DT_INST_NODE_HAS_PROP(0, mac_eeprom)
-static void get_mac_addr_from_i2c_eeprom(uint8_t mac_addr[6])
+static void get_mac_addr_from_i2c_eeprom(uint8_t mac_addr[6], const struct i2c_dt_spec i2c)
 {
 uint32_t iaddr = CONFIG_ETH_SAM_GMAC_MAC_I2C_INT_ADDRESS;
 int ret;
-const struct i2c_dt_spec i2c = I2C_DT_SPEC_GET(DT_INST_PHANDLE(0, mac_eeprom));
 
 if (!device_is_ready(i2c.bus)) {
 LOG_ERR("Bus device is not ready");
@@ -1681,15 +1679,21 @@ static void get_mac_addr_from_i2c_eeprom(uint8_t mac_addr[6])
 return;
 }
 }
-#endif
 
-static void generate_mac(uint8_t mac_addr[6])
+static void generate_mac(uint8_t mac_addr[6],
+ enum mac_address_source mac_addr_src,
+ const struct i2c_dt_spec mac_eeprom)
 {
-#if DT_INST_NODE_HAS_PROP(0, mac_eeprom)
-get_mac_addr_from_i2c_eeprom(mac_addr);
-#elif DT_INST_PROP(0, zephyr_random_mac_address)
-gen_random_mac(mac_addr, ATMEL_OUI_B0, ATMEL_OUI_B1, ATMEL_OUI_B2);
-#endif
+switch (mac_addr_src) {
+case MAC_ADDR_SOURCE_EEPROM:
+get_mac_addr_from_i2c_eeprom(mac_addr, mac_eeprom);
+break;
+case MAC_ADDR_SOURCE_RANDOM:
+gen_random_mac(mac_addr, ATMEL_OUI_B0, ATMEL_OUI_B1, ATMEL_OUI_B2);
+break;
+default:
+break;
+}
 }
 
 static void phy_link_state_changed(const struct device *pdev,
@@ -1767,7 +1771,7 @@ static void eth_iface_init(struct net_if *iface)
 return;
 }
 
-generate_mac(dev_data->mac_addr);
+generate_mac(dev_data->mac_addr, cfg->mac_addr_src, cfg->mac_eeprom);
 
 LOG_INF("%s MAC: %02x:%02x:%02x:%02x:%02x:%02x", dev->name,
 dev_data->mac_addr[0], dev_data->mac_addr[1],
@@ -2089,6 +2093,21 @@ static const struct ethernet_api eth_api = {
 #else
 #define CFG_CLK_DEFN(n)
 #endif
+
+#define SAM_GMAC_MAC_EEPROM_I2C(n)	\
+COND_CODE_1(DT_NODE_HAS_PROP(DT_DRV_INST(n), mac_eeprom),	\
+(I2C_DT_SPEC_GET(DT_INST_PHANDLE(n, mac_eeprom))),	\
+({}))
+
+#define SAM_GMAC_MAC_ADDR_SOURCE(n)	\
+COND_CODE_1(DT_NODE_HAS_PROP(DT_DRV_INST(n), mac_eeprom),	\
+(MAC_ADDR_SOURCE_EEPROM),	\
+(COND_CODE_1(DT_INST_PROP(n, zephyr_random_mac_address),	\
+(MAC_ADDR_SOURCE_RANDOM),	\
+(COND_CODE_1(DT_NODE_HAS_PROP(DT_DRV_INST(n), local_mac_address),	\
+(MAC_ADDR_SOURCE_LOCAL),	\
+(MAC_ADDR_SOURCE_INVALID))))))
+
 #define SAM_GMAC_CFG_DEFN(n)	\
 static const struct eth_sam_dev_cfg eth##n##_config = {	\
 .regs = (Gmac *)DT_INST_REG_ADDR(n),	\
@@ -2097,7 +2116,9 @@ static const struct ethernet_api eth_api = {
 .config_func = eth##n##_irq_config,	\
 .phy_dev = DEVICE_DT_GET(DT_INST_PHANDLE(n, phy_handle)),	\
 .num_queues = DT_INST_PROP(n, num_queues),	\
-.phy_conn_type = DT_INST_ENUM_IDX(n, phy_connection_type)	\
+.phy_conn_type = DT_INST_ENUM_IDX(n, phy_connection_type),	\
+.mac_addr_src = SAM_GMAC_MAC_ADDR_SOURCE(n),	\
+.mac_eeprom = SAM_GMAC_MAC_EEPROM_I2C(n),	\
 };
 
 #define DEFN_RX_FLAG_LIST_0(n)	\

drivers/ethernet/eth_sam_gmac_priv.h

@@ -262,6 +262,13 @@ struct gmac_queue {
 enum queue_idx que_idx;
 };
 
+enum mac_address_source {
+MAC_ADDR_SOURCE_LOCAL,
+MAC_ADDR_SOURCE_RANDOM,
+MAC_ADDR_SOURCE_EEPROM,
+MAC_ADDR_SOURCE_INVALID,
+};
+
 /* Device constant configuration parameters */
 struct eth_sam_dev_cfg {
 Gmac *regs;
@@ -271,8 +278,10 @@ struct eth_sam_dev_cfg {
 const struct pinctrl_dev_config *pcfg;
 void (*config_func)(void);
 const struct device *phy_dev;
-uint8_t num_queues;
-uint8_t phy_conn_type;
+const uint8_t num_queues;
+const uint8_t phy_conn_type;
+const enum mac_address_source mac_addr_src;
+const struct i2c_dt_spec mac_eeprom;
 };
 
 /* Device run time data */