linux-kernel - [PATCH] net: fec: Keep device numbering consistent with datasheet

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Date:   Wed, 23 Sep 2020 16:25:28 +0200
From:   Stefan Riedmueller <s.riedmueller@...tec.de>
To:     Fugang Duan <fugang.duan@....com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Christian Hemp <c.hemp@...tec.de>,
        Stefan Riedmueller <s.riedmueller@...tec.de>
Subject: [PATCH] net: fec: Keep device numbering consistent with datasheet

From: Christian Hemp <c.hemp@...tec.de>

Make use of device tree alias for device enumeration to keep the device
order consistent with the naming in the datasheet.

Otherwise for the i.MX 6UL/ULL the ENET1 interface is enumerated as eth1
and ENET2 as eth0.

Signed-off-by: Christian Hemp <c.hemp@...tec.de>
Signed-off-by: Stefan Riedmueller <s.riedmueller@...tec.de>
---
 drivers/net/ethernet/freescale/fec_main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index fb37816a74db..97dd41bed70a 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3504,6 +3504,7 @@ fec_probe(struct platform_device *pdev)
 	char irq_name[8];
 	int irq_cnt;
 	struct fec_devinfo *dev_info;
+	int eth_id;
 
 	fec_enet_get_queue_num(pdev, &num_tx_qs, &num_rx_qs);
 
@@ -3691,6 +3692,10 @@ fec_probe(struct platform_device *pdev)
 
 	ndev->max_mtu = PKT_MAXBUF_SIZE - ETH_HLEN - ETH_FCS_LEN;
 
+	eth_id = of_alias_get_id(pdev->dev.of_node, "ethernet");
+	if (eth_id >= 0)
+		sprintf(ndev->name, "eth%d", eth_id);
+
 	ret = register_netdev(ndev);
 	if (ret)
 		goto failed_register;
-- 
2.25.1