85 lines
2.7 KiB
Diff
85 lines
2.7 KiB
Diff
From b5375509184dc23d2b7fa0c5ed8763899ccc9674 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Sat, 2 Oct 2021 19:58:11 +0200
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Subject: [PATCH] net: bgmac: improve handling PHY
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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1. Use info from DT if available
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It allows describing for example a fixed link. It's more accurate than
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just guessing there may be one (depending on a chipset).
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2. Verify PHY ID before trying to connect PHY
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PHY addr 0x1e (30) is special in Broadcom routers and means a switch
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connected as MDIO devices instead of a real PHY. Don't try connecting to
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it.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/bgmac-bcma.c | 33 ++++++++++++++--------
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1 file changed, 21 insertions(+), 12 deletions(-)
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--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
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+++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
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@@ -11,6 +11,7 @@
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#include <linux/bcma/bcma.h>
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#include <linux/brcmphy.h>
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#include <linux/etherdevice.h>
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+#include <linux/of_mdio.h>
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#include <linux/of_net.h>
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#include "bgmac.h"
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@@ -86,17 +87,28 @@ static int bcma_phy_connect(struct bgmac
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struct phy_device *phy_dev;
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char bus_id[MII_BUS_ID_SIZE + 3];
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+ /* DT info should be the most accurate */
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+ phy_dev = of_phy_get_and_connect(bgmac->net_dev, bgmac->dev->of_node,
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+ bgmac_adjust_link);
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+ if (phy_dev)
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+ return 0;
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+
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/* Connect to the PHY */
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- snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, bgmac->mii_bus->id,
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- bgmac->phyaddr);
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- phy_dev = phy_connect(bgmac->net_dev, bus_id, bgmac_adjust_link,
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- PHY_INTERFACE_MODE_MII);
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- if (IS_ERR(phy_dev)) {
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- dev_err(bgmac->dev, "PHY connection failed\n");
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- return PTR_ERR(phy_dev);
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+ if (bgmac->mii_bus && bgmac->phyaddr != BGMAC_PHY_NOREGS) {
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+ snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, bgmac->mii_bus->id,
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+ bgmac->phyaddr);
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+ phy_dev = phy_connect(bgmac->net_dev, bus_id, bgmac_adjust_link,
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+ PHY_INTERFACE_MODE_MII);
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+ if (IS_ERR(phy_dev)) {
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+ dev_err(bgmac->dev, "PHY connection failed\n");
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+ return PTR_ERR(phy_dev);
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+ }
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+
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+ return 0;
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}
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- return 0;
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+ /* Assume a fixed link to the switch port */
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+ return bgmac_phy_connect_direct(bgmac);
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}
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static const struct bcma_device_id bgmac_bcma_tbl[] = {
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@@ -297,10 +309,7 @@ static int bgmac_probe(struct bcma_devic
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bgmac->cco_ctl_maskset = bcma_bgmac_cco_ctl_maskset;
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bgmac->get_bus_clock = bcma_bgmac_get_bus_clock;
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bgmac->cmn_maskset32 = bcma_bgmac_cmn_maskset32;
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- if (bgmac->mii_bus)
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- bgmac->phy_connect = bcma_phy_connect;
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- else
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- bgmac->phy_connect = bgmac_phy_connect_direct;
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+ bgmac->phy_connect = bcma_phy_connect;
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err = bgmac_enet_probe(bgmac);
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if (err)
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