linux-kernel - [PATCH net v1] net: phy: micrel: Correct bit assignment for MICREL_KSZ8_P1

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Message-Id: <20230831110427.3551432-1-o.rempel@pengutronix.de>
Date:   Thu, 31 Aug 2023 13:04:27 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, Russell King <linux@...linux.org.uk>,
        netdev@...r.kernel.org, Lukasz Majewski <lukma@...x.de>
Subject: [PATCH net v1] net: phy: micrel: Correct bit assignment for MICREL_KSZ8_P1_ERRATA flag

The previous assignment of the phy_device quirk for the
MICREL_KSZ8_P1_ERRATA flag was incorrect, working only due to
coincidental conditions. Specifically:

- The flag MICREL_KSZ8_P1_ERRATA, intended for KSZ88xx switches, was
  mistakenly overlapping with the MICREL_PHY_FXEN and
  MICREL_PHY_50MHZ_CLK flags.
- MICREL_PHY_FXEN is used by the KSZ8041 PHY, and its related code path
  wasn't executed for KSZ88xx PHYs and other way around.
- Additionally, the code path associated with the MICREL_PHY_50MHZ_CLK
  flag wasn't executed for KSZ88xx either.

Fixes: 49011e0c1555d ("net: phy: micrel: ksz886x/ksz8081: add cabletest support")
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 include/linux/micrel_phy.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h
index 8bef1ab62bba3..0cedbeb9167c3 100644
--- a/include/linux/micrel_phy.h
+++ b/include/linux/micrel_phy.h
@@ -43,7 +43,7 @@
 /* struct phy_device dev_flags definitions */
 #define MICREL_PHY_50MHZ_CLK	0x00000001
 #define MICREL_PHY_FXEN		0x00000002
-#define MICREL_KSZ8_P1_ERRATA	0x00000003
+#define MICREL_KSZ8_P1_ERRATA	BIT(3)
 
 #define MICREL_KSZ9021_EXTREG_CTRL	0xB
 #define MICREL_KSZ9021_EXTREG_DATA_WRITE	0xC
-- 
2.39.2