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From: Steve Bennett <steveb@workware.net.au>
To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk,
	davem@davemloft.net, kuba@kernel.org, marex@denx.de
Cc: Steve Bennett <steveb@workware.net.au>
Subject: [PATCH v2] net: phy: micrel: Fix detection of ksz87xx switch
Date: Sat, 31 Jul 2021 08:57:50 +1000	[thread overview]
Message-ID: <20210730225750.98849-1-steveb@workware.net.au> (raw)
In-Reply-To: <20210730105120.93743-1-steveb@workware.net.au>

The logic for discerning between KSZ8051 and KSZ87XX PHYs is incorrect
such that the that KSZ87XX switch is not identified correctly.

ksz8051_ksz8795_match_phy_device() uses the parameter ksz_phy_id
to discriminate whether it was called from ksz8051_match_phy_device()
or from ksz8795_match_phy_device() but since PHY_ID_KSZ87XX is the
same value as PHY_ID_KSZ8051, this doesn't work.

Instead use a bool to discriminate the caller.

Without this patch, the KSZ8795 switch port identifies as:

ksz8795-switch spi3.1 ade1 (uninitialized): PHY [dsa-0.1:03] driver [Generic PHY]

With the patch, it identifies correctly:

ksz8795-switch spi3.1 ade1 (uninitialized): PHY [dsa-0.1:03] driver [Micrel KSZ87XX Switch]

Fixes: 8b95599c55ed24b36cf4 ("net: phy: micrel: Discern KSZ8051 and KSZ8795 PHYs")
Signed-off-by: Steve Bennett <steveb@workware.net.au>
---
 drivers/net/phy/micrel.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 4d53886f7d51..53bdd673ae56 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -401,11 +401,11 @@ static int ksz8041_config_aneg(struct phy_device *phydev)
 }
 
 static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev,
-					    const u32 ksz_phy_id)
+					    const bool ksz_8051)
 {
 	int ret;
 
-	if ((phydev->phy_id & MICREL_PHY_ID_MASK) != ksz_phy_id)
+	if ((phydev->phy_id & MICREL_PHY_ID_MASK) != PHY_ID_KSZ8051)
 		return 0;
 
 	ret = phy_read(phydev, MII_BMSR);
@@ -418,7 +418,7 @@ static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev,
 	 * the switch does not.
 	 */
 	ret &= BMSR_ERCAP;
-	if (ksz_phy_id == PHY_ID_KSZ8051)
+	if (ksz_8051)
 		return ret;
 	else
 		return !ret;
@@ -426,7 +426,7 @@ static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev,
 
 static int ksz8051_match_phy_device(struct phy_device *phydev)
 {
-	return ksz8051_ksz8795_match_phy_device(phydev, PHY_ID_KSZ8051);
+	return ksz8051_ksz8795_match_phy_device(phydev, true);
 }
 
 static int ksz8081_config_init(struct phy_device *phydev)
@@ -535,7 +535,7 @@ static int ksz8061_config_init(struct phy_device *phydev)
 
 static int ksz8795_match_phy_device(struct phy_device *phydev)
 {
-	return ksz8051_ksz8795_match_phy_device(phydev, PHY_ID_KSZ87XX);
+	return ksz8051_ksz8795_match_phy_device(phydev, false);
 }
 
 static int ksz9021_load_values_from_of(struct phy_device *phydev,
-- 
2.24.2 (Apple Git-127)


  parent reply	other threads:[~2021-07-30 22:58 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30 10:51 [PATCH] net: phy: micrel: Fix detection of ksz87xx switch Steve Bennett
2021-07-30 16:59 ` Jakub Kicinski
2021-07-30 22:19   ` Steve Bennett
2021-08-07  0:01     ` Ben Hutchings
2021-08-07  0:06       ` [PATCH net] net: phy: micrel: Fix link detection on ksz87xx switch" Ben Hutchings
2021-08-08 11:10         ` patchwork-bot+netdevbpf
2021-08-08 22:18       ` [PATCH] net: phy: micrel: Fix detection of ksz87xx switch Steve Bennett
2021-07-30 22:57 ` Steve Bennett [this message]
2021-07-30 23:08   ` [PATCH v2] " Marek Vasut
2021-08-02 14:10   ` patchwork-bot+netdevbpf

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