linux-kernel - [PATCH net v2 2/2] net: dsa: mt7530: fix disabling EEE on failure on MT7531 and MT7988

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Message-Id: <20240321-for-net-mt7530-fix-eee-for-mt7531-mt7988-v2-2-9af9d5041bfe@arinc9.com>
Date: Thu, 21 Mar 2024 19:29:14 +0300
From: Arınç ÜNAL via B4 Relay <devnull+arinc.unal.arinc9.com@...nel.org>
To: Daniel Golle <daniel@...rotopia.org>, DENG Qingfang <dqfext@...il.com>, 
 Sean Wang <sean.wang@...iatek.com>, Andrew Lunn <andrew@...n.ch>, 
 Florian Fainelli <f.fainelli@...il.com>, 
 Vladimir Oltean <olteanv@...il.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 René van Dorst <opensource@...rst.com>, 
 Russell King <linux@...linux.org.uk>, 
 SkyLake Huang <SkyLake.Huang@...iatek.com>, 
 Heiner Kallweit <hkallweit1@...il.com>
Cc: Bartel Eerdekens <bartel.eerdekens@...stell8.be>, 
 mithat.guner@...ont.com, erkin.bozoglu@...ont.com, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, 
 Arınç ÜNAL <arinc.unal@...nc9.com>
Subject: [PATCH net v2 2/2] net: dsa: mt7530: fix disabling EEE on failure
 on MT7531 and MT7988

From: Arınç ÜNAL <arinc.unal@...nc9.com>

The MT7531_FORCE_EEE1G and MT7531_FORCE_EEE100 bits let the
PMCR_FORCE_EEE1G and PMCR_FORCE_EEE100 bits determine the 1G/100 EEE
abilities of the MAC. If MT7531_FORCE_EEE1G and MT7531_FORCE_EEE100 are
unset, the abilities are left to be determined by PHY auto polling.

The commit 40b5d2f15c09 ("net: dsa: mt7530: Add support for EEE features")
made it so that the PMCR_FORCE_EEE1G and PMCR_FORCE_EEE100 bits are set on
mt753x_phylink_mac_link_up(). But it did not set the MT7531_FORCE_EEE1G and
MT7531_FORCE_EEE100 bits. Because of this, EEE will be enabled on the
switch MACs by polling the PHY, regardless of the result of phy_init_eee().

Define these bits and add them to MT7531_FORCE_MODE which is being used by
the subdriver. With this, EEE will be prevented from being enabled on the
switch MACs when phy_init_eee() fails.

Fixes: 40b5d2f15c09 ("net: dsa: mt7530: Add support for EEE features")
Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
---
 drivers/net/dsa/mt7530.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index 509ed5362236..5b99aeca34b4 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -299,11 +299,15 @@ enum mt7530_vlan_port_acc_frm {
 #define  MT7531_FORCE_DPX		BIT(29)
 #define  MT7531_FORCE_RX_FC		BIT(28)
 #define  MT7531_FORCE_TX_FC		BIT(27)
+#define  MT7531_FORCE_EEE100		BIT(26)
+#define  MT7531_FORCE_EEE1G		BIT(25)
 #define  MT7531_FORCE_MODE		(MT7531_FORCE_LNK | \
 					 MT7531_FORCE_SPD | \
 					 MT7531_FORCE_DPX | \
 					 MT7531_FORCE_RX_FC | \
-					 MT7531_FORCE_TX_FC)
+					 MT7531_FORCE_TX_FC | \
+					 MT7531_FORCE_EEE100 | \
+					 MT7531_FORCE_EEE1G)
 #define  PMCR_LINK_SETTINGS_MASK	(PMCR_TX_EN | PMCR_FORCE_SPEED_1000 | \
 					 PMCR_RX_EN | PMCR_FORCE_SPEED_100 | \
 					 PMCR_TX_FC_EN | PMCR_RX_FC_EN | \

-- 
2.40.1