netdev - [PATCH 1/4] net: dsa: mv88e6xxx: Allow mv88e6xxx_smi

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Message-Id: <20161219141610.30934-2-romain.perier@free-electrons.com>
Date:   Mon, 19 Dec 2016 15:16:06 +0100
From:   Romain Perier <romain.perier@...e-electrons.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory Clement <gregory.clement@...e-electrons.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Pawel Moll <pawel.moll@....com>,
        Mark Rutland <mark.rutland@....com>,
        Kumar Gala <galak@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Nadav Haklai <nadavh@...vell.com>,
        Romain Perier <romain.perier@...e-electrons.com>
Subject: [PATCH 1/4] net: dsa: mv88e6xxx: Allow mv88e6xxx_smi_init() to be used at address 0x1

Currently, the function mv88e6xxx_smi_init() returns -EINVAL if the bit
zero of sw_addr is 0x1. However, on some platforms, ethernet switches
are configured in Multi chip addressing mode and available at MDIO
address 0x1.

Signed-off-by: Romain Perier <romain.perier@...e-electrons.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index f7222dc..b5f0e1e 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -4240,10 +4240,6 @@ static void mv88e6xxx_phy_destroy(struct mv88e6xxx_chip *chip)
 static int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
 			      struct mii_bus *bus, int sw_addr)
 {
-	/* ADDR[0] pin is unavailable externally and considered zero */
-	if (sw_addr & 0x1)
-		return -EINVAL;
-
 	if (sw_addr == 0)
 		chip->smi_ops = &mv88e6xxx_smi_single_chip_ops;
 	else if (mv88e6xxx_has(chip, MV88E6XXX_FLAGS_MULTI_CHIP))
-- 
2.9.3