linux-kernel - [PATCH net-next 2/2] net: dsa: lan9303: Adjust phy_addr

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Message-Id: <20171229123824.28452-3-privat@egil-hjelmeland.no>
Date:   Fri, 29 Dec 2017 13:38:24 +0100
From:   Egil Hjelmeland <privat@...l-hjelmeland.no>
To:     andrew@...n.ch, vivien.didelot@...oirfairelinux.com,
        f.fainelli@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Egil Hjelmeland <privat@...l-hjelmeland.no>
Subject: [PATCH net-next 2/2] net: dsa: lan9303: Adjust phy_addr_base expressions

Simplify calculation of chip->phy_addr_base in lan9303_detect_phy_setup().

Use GENMASK to calculate phys_mii_mask from LAN9303_NUM_PORTS and
phy_addr_base.

Signed-off-by: Egil Hjelmeland <privat@...l-hjelmeland.no>
---
 drivers/net/dsa/lan9303-core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 3088cdc5d205..4efb772dbc7e 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -495,10 +495,7 @@ static int lan9303_detect_phy_setup(struct lan9303 *chip)
 		return reg;
 	}
 
-	if ((reg != 0) && (reg != 0xffff))
-		chip->phy_addr_base = 1;
-	else
-		chip->phy_addr_base = 0;
+	chip->phy_addr_base = reg != 0 && reg != 0xffff;
 
 	dev_dbg(chip->dev, "Phy setup '%s' detected\n",
 		chip->phy_addr_base ? "1-2-3" : "0-1-2");
@@ -1283,13 +1280,16 @@ static const struct dsa_switch_ops lan9303_switch_ops = {
 
 static int lan9303_register_switch(struct lan9303 *chip)
 {
+	int base;
+
 	chip->ds = dsa_switch_alloc(chip->dev, LAN9303_NUM_PORTS);
 	if (!chip->ds)
 		return -ENOMEM;
 
 	chip->ds->priv = chip;
 	chip->ds->ops = &lan9303_switch_ops;
-	chip->ds->phys_mii_mask = chip->phy_addr_base ? 0xe : 0x7;
+	base = chip->phy_addr_base;
+	chip->ds->phys_mii_mask = GENMASK(LAN9303_NUM_PORTS - 1 + base, base);
 
 	return dsa_register_switch(chip->ds);
 }
-- 
2.14.1