linux-kernel - [PATCH v1] net: fec: Add stop mode support on i.MX8DX/i.MX8QP

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Message-ID: <20251223163328.139734-1-francesco@dolcini.it>
Date: Tue, 23 Dec 2025 17:33:27 +0100
From: Francesco Dolcini <francesco@...cini.it>
To: Wei Fang <wei.fang@....com>,
	Shenwei Wang <shenwei.wang@....com>,
	Clark Wang <xiaoning.wang@....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>
Cc: Francesco Dolcini <francesco.dolcini@...adex.com>,
	imx@...ts.linux.dev,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] net: fec: Add stop mode support on i.MX8DX/i.MX8QP

From: Francesco Dolcini <francesco.dolcini@...adex.com>

Add additional machines that requires communication to the SC firmware
to set the GPR bit required for stop mode support.

NXP i.MX8DX (fsl,imx8dx) is a low end version of i.MX8QXP (fsl,imx8qxp),
while NXP i.MX8QP (fsl,imx8qp) is a low end version of i.MX8QM
(fsl,imx8qp).

Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
 drivers/net/ethernet/freescale/fec_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index c685a5c0cc51..2eacc35e0b8a 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1334,7 +1334,9 @@ fec_restart(struct net_device *ndev)
 static int fec_enet_ipc_handle_init(struct fec_enet_private *fep)
 {
 	if (!(of_machine_is_compatible("fsl,imx8qm") ||
+	      of_machine_is_compatible("fsl,imx8qp") ||
 	      of_machine_is_compatible("fsl,imx8qxp") ||
+	      of_machine_is_compatible("fsl,imx8dx") ||
 	      of_machine_is_compatible("fsl,imx8dxl")))
 		return 0;
 
-- 
2.47.3