linux-kernel - [PATCH] net: dsa: mv88e6xxx: Allow external SMI if serial

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Date:   Wed, 24 Aug 2022 11:37:06 +0200
From:   Marcus Carlberg <marcus.carlberg@...s.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        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>
CC:     <kernel@...s.com>, Marcus Carlberg <marcus.carlberg@...s.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] net: dsa: mv88e6xxx: Allow external SMI if serial

p0_mode set to one of the supported serial mode should not prevent
configuring the external SMI interface in
mv88e6xxx_g2_scratch_gpio_set_smi. The current masking of the p0_mode
only checks the first 2 bits. This results in switches supporting
serial mode cannot setup external SMI on certain serial modes
(Ex: 1000BASE-X and SGMII).

Extend the mask of the p0_mode to include the reduced modes and
serial modes as allowed modes for the external SMI interface.

Signed-off-by: Marcus Carlberg <marcus.carlberg@...s.com>
---
 drivers/net/dsa/mv88e6xxx/global2.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h
index 807aeaad9830..7536b8b0ad01 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.h
+++ b/drivers/net/dsa/mv88e6xxx/global2.h
@@ -298,7 +298,7 @@
 #define MV88E6352_G2_SCRATCH_CONFIG_DATA1	0x71
 #define MV88E6352_G2_SCRATCH_CONFIG_DATA1_NO_CPU	BIT(2)
 #define MV88E6352_G2_SCRATCH_CONFIG_DATA2	0x72
-#define MV88E6352_G2_SCRATCH_CONFIG_DATA2_P0_MODE_MASK	0x3
+#define MV88E6352_G2_SCRATCH_CONFIG_DATA2_P0_MODE_MASK	0xf
 #define MV88E6352_G2_SCRATCH_CONFIG_DATA3	0x73
 #define MV88E6352_G2_SCRATCH_CONFIG_DATA3_S_SEL		BIT(1)
 
-- 
2.20.1