From:   Chris Healy <cphealy@gmail.com>
To:     cphealy@gmail.com, andrew@lunn.ch, hkallweit1@gmail.com,
        linux@armlinux.org.uk, davem@davemloft.net,
        neil.armstrong@linaro.org, khilman@baylibre.com,
        netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
        jeremy.wang@amlogic.com
Cc:     Chris Healy <healych@amazon.com>
Subject: [PATCH 1/1] net: phy: meson-gxl: Add generic dummy stubs for MMD register access
Date:   Sat, 28 Jan 2023 18:26:15 -0800
Message-Id: <20230129022615.379711-1-cphealy@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Chris Healy <healych@amazon.com>

The Meson G12A Internal PHY does not support standard IEEE MMD extended
register access, therefore add generic dummy stubs to fail the read and
write MMD calls. This is necessary to prevent the core PHY code from
erroneously believing that EEE is supported by this PHY even though this
PHY does not support EEE, as MMD register access returns all FFFFs.

Signed-off-by: Chris Healy <healych@amazon.com>
---
 drivers/net/phy/meson-gxl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c
index c49062ad72c6..5e41658b1e2f 100644
--- a/drivers/net/phy/meson-gxl.c
+++ b/drivers/net/phy/meson-gxl.c
@@ -271,6 +271,8 @@ static struct phy_driver meson_gxl_phy[] = {
 		.handle_interrupt = meson_gxl_handle_interrupt,
 		.suspend        = genphy_suspend,
 		.resume         = genphy_resume,
+		.read_mmd	= genphy_read_mmd_unsupported,
+		.write_mmd	= genphy_write_mmd_unsupported,
 	},
 };
 
-- 
2.39.1