linux-kernel - [PATCH net-next v2 5/8] net: sparx5: verify RGMII speeds

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Message-ID: <20241113-sparx5-lan969x-switch-driver-4-v2-5-0db98ac096d1@microchip.com>
Date: Wed, 13 Nov 2024 22:11:13 +0100
From: Daniel Machon <daniel.machon@...rochip.com>
To: <UNGLinuxDriver@...rochip.com>, Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, "Lars
 Povlsen" <lars.povlsen@...rochip.com>, Steen Hegelund
	<Steen.Hegelund@...rochip.com>, Horatiu Vultur
	<horatiu.vultur@...rochip.com>, Russell King <linux@...linux.org.uk>,
	<jacob.e.keller@...el.com>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>
CC: <devicetree@...r.kernel.org>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH net-next v2 5/8] net: sparx5: verify RGMII speeds

When doing a port config, we verify the port speed against the PHY mode
and supported speeds of that PHY mode.

Add checks for the four RGMII phy modes: RGMII, RGMII_ID, RGMII_TXID and
RGMII_RXID.

Reviewed-by: Steen Hegelund <Steen.Hegelund@...rochip.com>
Reviewed-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>
---
 drivers/net/ethernet/microchip/sparx5/sparx5_port.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_port.c b/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
index b494970752fd..9f0f687bd994 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_port.c
@@ -257,6 +257,15 @@ static int sparx5_port_verify_speed(struct sparx5 *sparx5,
 		     conf->speed != SPEED_25000))
 			return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
 		break;
+	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+		if (conf->speed != SPEED_1000 &&
+		    conf->speed != SPEED_100 &&
+		    conf->speed != SPEED_10)
+			return sparx5_port_error(port, conf, SPX5_PERR_SPEED);
+		break;
 	default:
 		return sparx5_port_error(port, conf, SPX5_PERR_IFTYPE);
 	}

-- 
2.34.1