Thread (36 messages) 36 messages, 6 authors, 2025-01-23

Re: [RFC PATCH 02/10] net: ti: prueth: Adds ICSSM Ethernet driver

From: Basharath Hussain Khaja <hidden>
Date: 2025-01-22 15:33:44
Also in: linux-arm-kernel, linux-devicetree, linux-omap, lkml

quoted
+	emac->phy_node = of_parse_phandle(eth_node, "phy-handle", 0);
+	if (!emac->phy_node) {
+		dev_err(prueth->dev, "couldn't find phy-handle\n");
+		ret = -ENODEV;
+		goto free;
+	}
+
+	ret = of_get_phy_mode(eth_node, &emac->phy_if);
+	if (ret) {
+		dev_err(prueth->dev, "could not get phy-mode property err %d\n",
+			ret);
+		goto free;
+	}
+
+	/* connect PHY */
+	emac->phydev = of_phy_connect(ndev, emac->phy_node,
+				      &icssm_emac_adjust_link, 0, emac->phy_if);
+	if (!emac->phydev) {
+		dev_dbg(prueth->dev, "couldn't connect to phy %s\n",
+			emac->phy_node->full_name);
+		ret = -EPROBE_DEFER;
+		goto free;
+	}
of_phy_get_and_connect() will simplify this.
Yes. This API does same functionality, we will replace three APIs with single 
API in the next version.
quoted
+	/* remove unsupported modes */
+	phy_remove_link_mode(emac->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
+	phy_remove_link_mode(emac->phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
It only does 100Mbps?
It is capable of both 100M/10M full/half-duplex modes. In this patch series we are 
adding support for 100M full duplex operation. Support for other modes will be added 
subsequently.
quoted
+	if (of_property_read_bool(eth_node, "ti,no-half-duplex")) {
Is this becasue 100baseT_Half is broken in some versions of the
hardware?
No.This property will be removed as we have added support only for 100M full duplex.
 
quoted
+		phy_remove_link_mode(emac->phydev,
+				     ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+	}
+
+	phy_remove_link_mode(emac->phydev, ETHTOOL_LINK_MODE_Pause_BIT);
+	phy_remove_link_mode(emac->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
Is this really needed? I've not checked, but if you don't call
phy_support_sym_pause() or phy_support_asym_pause(), i would of
expected phylib to default to no pause?
 
Though TI PHY default state is clear(ASM_DIR - 0 & PAUSE - 0 as Default
state in ANAR register), this bits are cleared again to handle if in case 
of change in PHY.
quoted
+static const struct of_device_id prueth_dt_match[];
Please avoid forward references. If you need the match table, define
it here.
 
Sure. This got escaped while cleanup. We will address this in the next version.

Thanks & Best Regards,
Basharath
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