net: usb: asix: allow optionally getting mac address from device tree (03fc5d4f) · Commits · 戴 / test

For Embedded use where e.g. AX88772B chips may be used without external EEPROMs the boot loader may choose to pass the MAC address to be used via device tree. Therefore, allow for optionally getting the MAC address from device tree data e.g. as follows (excerpt from a T30 based board, local-mac-address to be filled in by boot loader): /* EHCI instance 1: USB2_DP/N -> AX88772B */ usb@7d004000 { status = "okay"; #address-cells = <1>; #size-cells = <0>; asix@1 { reg = <1>; local-mac-address = [00 00 00 00 00 00]; }; }; Signed-off-by:

Marcel Ziswiler <marcel.ziswiler@toradex.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

drivers/net/usb/asix_devices.c

+23 −15

Original line number	Diff line number	Diff line
		@@ -693,11 +693,17 @@ static int ax88772_bind(struct usbnet dev, struct usb_interface intf)

		usbnet_get_endpoints(dev, intf);

		/* Get the MAC address */
		/* Maybe the boot loader passed the MAC address via device tree */
		if (!eth_platform_get_mac_address(&dev->udev->dev, buf)) {
		netif_dbg(dev, ifup, dev->net,
		"MAC address read from device tree");
		} else {
		/* Try getting the MAC address from EEPROM */
		if (dev->driver_info->data & FLAG_EEPROM_MAC) {
		for (i = 0; i < (ETH_ALEN >> 1); i++) {
		ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, 0x04 + i,
		0, 2, buf + i * 2, 0);
		ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM,
		0x04 + i, 0, 2, buf + i * 2,
		0);
		if (ret < 0)
		break;
		}
		@@ -707,9 +713,11 @@ static int ax88772_bind(struct usbnet dev, struct usb_interface intf)
		}

		if (ret < 0) {
		netdev_dbg(dev->net, "Failed to read MAC address: %d\n", ret);
		netdev_dbg(dev->net, "Failed to read MAC address: %d\n",
		ret);
		return ret;
		}
		}

		asix_set_netdev_dev_addr(dev, buf);

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