From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Holland Subject: [Intel-wired-lan] [next] igb: allow setting MAC address on i211 using a device tree blob V2 Date: Sat, 13 Feb 2016 23:04:45 +0100 Message-ID: <56BFA87D.1010609@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit To: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Return-path: Received: from mail-wm0-f53.google.com ([74.125.82.53]:38595 "EHLO mail-wm0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750961AbcBMWEs (ORCPT ); Sat, 13 Feb 2016 17:04:48 -0500 Received: by mail-wm0-f53.google.com with SMTP id a4so10531149wme.1 for ; Sat, 13 Feb 2016 14:04:48 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: Hello, The Intel i211 LOM pcie ethernet controllers' iNVM operates as an OTP and has no externel EEPROM interface [1]. The following allows the driver to pickup the MAC address from a device tree blob when CONFIG_OF has been enabled. [1] http://www.intel.com/content/www/us/en/embedded/products/networking/i211-ethernet-controller-datasheet.html Changes V2 - Restrict searching for compatible devices to current pci device. Signed-off-by: John Holland --- drivers/net/ethernet/intel/igb/igb_main.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 31e5f39..f7788fa 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -56,6 +56,11 @@ #include #include "igb.h" +#ifdef CONFIG_OF +#include +#include +#endif + #define MAJ 5 #define MIN 3 #define BUILD 0 @@ -2216,6 +2221,26 @@ static s32 igb_init_i2c(struct igb_adapter *adapter) return status; } +#ifdef CONFIG_OF +/** + * igb_read_mac_addr_dts - Read mac address from the device tree blob + * @dev: pointer to device structure + * @mac_addr: pointer to found mac address + **/ +static void igb_read_mac_addr_dts(const struct device *dev, u8 *mac_addr) +{ + const u8 *mac; + struct device_node *dn; + + dn = of_find_compatible_node(dev->of_node, NULL, "intel,i210"); + if (dn) { + mac = of_get_mac_address(dn); + if (mac) + ether_addr_copy(mac_addr, mac); + } +} +#endif + /** * igb_probe - Device Initialization Routine * @pdev: PCI device information struct @@ -2420,6 +2445,11 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (hw->mac.ops.read_mac_addr(hw)) dev_err(&pdev->dev, "NVM Read Error\n"); +#ifdef CONFIG_OF + if (!is_valid_ether_addr(hw->mac.addr)) + igb_read_mac_addr_dts(&pdev->dev, hw->mac.addr); +#endif + memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len); if (!is_valid_ether_addr(netdev->dev_addr)) {