Add support for the Microchip LAN8742 Ethernet PHY chip.

Author: ewpa

Diff for: libraries/WiFi/src/ETH.cpp

@@ -36,6 +36,7 @@
     #include "eth_phy/phy.h"
     #include "eth_phy/phy_tlk110.h"
     #include "eth_phy/phy_lan8720.h"
+    #include "eth_phy/phy_lan8742.h"
 #endif
 #include "lwip/err.h"
 #include "lwip/dns.h"
@@ -273,6 +274,9 @@ bool ETHClass::begin(uint8_t phy_addr, int power, int mdc, int mdio, eth_phy_typ
         case ETH_PHY_LAN8720:
             eth_phy = esp_eth_phy_new_lan8720(&phy_config);
             break;
+        case ETH_PHY_LAN8742:
+            eth_phy = esp_eth_phy_new_lan8742(&phy_config);
+            break;
         case ETH_PHY_TLK110:
             eth_phy = esp_eth_phy_new_ip101(&phy_config);
             break;
@@ -334,6 +338,9 @@ bool ETHClass::begin(uint8_t phy_addr, int power, int mdc, int mdio, eth_phy_typ
     if(type == ETH_PHY_LAN8720){
         eth_config_t config = phy_lan8720_default_ethernet_config;
         memcpy(&eth_config, &config, sizeof(eth_config_t));
+    } else if(type == ETH_PHY_LAN8742){
+        eth_config_t config = phy_lan8742_default_ethernet_config;
+        memcpy(&eth_config, &config, sizeof(eth_config_t));
     } else if(type == ETH_PHY_TLK110){
         eth_config_t config = phy_tlk110_default_ethernet_config;
         memcpy(&eth_config, &config, sizeof(eth_config_t));

Diff for: libraries/WiFi/src/ETH.h

@@ -53,7 +53,7 @@
 typedef enum { ETH_CLOCK_GPIO0_IN, ETH_CLOCK_GPIO0_OUT, ETH_CLOCK_GPIO16_OUT, ETH_CLOCK_GPIO17_OUT } eth_clock_mode_t;
 #endif
 
-typedef enum { ETH_PHY_LAN8720, ETH_PHY_TLK110, ETH_PHY_RTL8201, ETH_PHY_DP83848, ETH_PHY_DM9051, ETH_PHY_KSZ8081, ETH_PHY_MAX } eth_phy_type_t;
+typedef enum { ETH_PHY_LAN8720, ETH_PHY_LAN8742, ETH_PHY_TLK110, ETH_PHY_RTL8201, ETH_PHY_DP83848, ETH_PHY_DM9051, ETH_PHY_KSZ8081, ETH_PHY_MAX } eth_phy_type_t;
 #define ETH_PHY_IP101 ETH_PHY_TLK110
 
 class ETHClass {

Diff for: tools/sdk/esp32/include/esp_eth/include/esp_eth_phy.h

@@ -242,6 +242,17 @@ esp_eth_phy_t *esp_eth_phy_new_rtl8201(const eth_phy_config_t *config);
 */
 esp_eth_phy_t *esp_eth_phy_new_lan8720(const eth_phy_config_t *config);
 
+/**
+* @brief Create a PHY instance of LAN8742
+*
+* @param[in] config: configuration of PHY
+*
+* @return
+*      - instance: create PHY instance successfully
+*      - NULL: create PHY instance failed because some error occurred
+*/
+esp_eth_phy_t *esp_eth_phy_new_lan8742(const eth_phy_config_t *config);
+
 /**
 * @brief Create a PHY instance of DP83848
 *