netdev - [PATCH net-next] igb: Add MII write support

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Date: Tue, 18 Jun 2024 14:33:28 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Jackie Jone <jackie.jone@...iedtelesis.co.nz>,
	anthony.l.nguyen@...el.com,
	chris.packham@...iedtelesis.co.nz,
	andrew@...n.ch,
	Jacob Keller <jacob.e.keller@...el.com>,
	Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com>
Subject: [PATCH net-next] igb: Add MII write support

From: Jackie Jone <jackie.jone@...iedtelesis.co.nz>

To facilitate running PHY parametric tests, add support for the SIOCSMIIREG
ioctl. This allows a userspace application to write to the PHY registers
to enable the test modes.

Signed-off-by: Jackie Jone <jackie.jone@...iedtelesis.co.nz>
Acked-by: Jacob Keller <jacob.e.keller@...el.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index fce2930ae6af..3af03a211c3c 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -9139,6 +9139,10 @@ static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 			return -EIO;
 		break;
 	case SIOCSMIIREG:
+		if (igb_write_phy_reg(&adapter->hw, data->reg_num & 0x1F,
+				      data->val_in))
+			return -EIO;
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
-- 
2.41.0