From: Chris Healy healych@amazon.com
commit afc2336f89dc0fc0ef25b92366814524b0fd90fb upstream.
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.
Fixes: 5c3407abb338 ("net: phy: meson-gxl: add g12a support") Reviewed-by: Heiner Kallweit hkallweit1@gmail.com Signed-off-by: Chris Healy healych@amazon.com Reviewed-by: Jerome Brunet jbrunet@baylibre.com Link: https://lore.kernel.org/r/20230130231402.471493-1-cphealy@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/phy/meson-gxl.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/phy/meson-gxl.c +++ b/drivers/net/phy/meson-gxl.c @@ -258,6 +258,8 @@ static struct phy_driver meson_gxl_phy[] .config_intr = meson_gxl_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, + .read_mmd = genphy_read_mmd_unsupported, + .write_mmd = genphy_write_mmd_unsupported, }, };