meson: odroid-c2: enable Ethernet support through the device tree

Remove the device definition from board file, update the driver with
the new compatible property and update config with necessary options.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/include/asm/arch-meson/gxbb.h

@@ -20,9 +20,6 @@
 #define GXBB_GPIO_IN(n)		GXBB_PERIPHS_ADDR(_GXBB_GPIO_OFF(n) + 1)
 #define GXBB_GPIO_OUT(n)	GXBB_PERIPHS_ADDR(_GXBB_GPIO_OFF(n) + 2)
 
-/* Pinmux registers 0 to 12 */
-#define GXBB_PINMUX(n)		GXBB_PERIPHS_ADDR(0x2c + (n))
-
 #define GXBB_ETH_REG_0		GXBB_PERIPHS_ADDR(0x50)
 #define GXBB_ETH_REG_1		GXBB_PERIPHS_ADDR(0x51)
 

board/amlogic/odroid-c2/odroid-c2.c

@@ -21,24 +21,11 @@ int board_init(void)
 	return 0;
 }
 
-static const struct eth_pdata gxbb_eth_pdata = {
-	.iobase = GXBB_ETH_BASE,
-	.phy_interface = PHY_INTERFACE_MODE_RGMII,
-};
-
-U_BOOT_DEVICE(meson_eth) = {
-	.name = "eth_designware",
-	.platdata = &gxbb_eth_pdata,
-};
-
 int misc_init_r(void)
 {
 	u8 mac_addr[EFUSE_MAC_SIZE];
 	ssize_t len;
 
-	/* Select Ethernet function */
-	setbits_le32(GXBB_PINMUX(6), 0x3fff);
-
 	/* Set RGMII mode */
 	setbits_le32(GXBB_ETH_REG_0, GXBB_ETH_REG_0_PHY_INTF |
 				     GXBB_ETH_REG_0_TX_PHASE(1) |

configs/odroid-c2_defconfig

@@ -14,6 +14,9 @@ CONFIG_HUSH_PARSER=y
 CONFIG_OF_CONTROL=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM_ETH=y
+CONFIG_ETH_DESIGNWARE=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_MESON_GXBB=y
 CONFIG_DEBUG_UART=y
 CONFIG_DEBUG_UART_MESON=y
 CONFIG_DEBUG_UART_BASE=0xc81004c0

drivers/net/designware.c

@@ -737,6 +737,7 @@ static int designware_eth_ofdata_to_platdata(struct udevice *dev)
 static const struct udevice_id designware_eth_ids[] = {
 	{ .compatible = "allwinner,sun7i-a20-gmac" },
 	{ .compatible = "altr,socfpga-stmmac" },
+	{ .compatible = "amlogic,meson6-dwmac" },
 	{ }
 };