linux-kernel - [PATCH net-next v3 3/8] net: dsa: vsc73xx: Add define for max num of ports

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Message-Id: <20230912122201.3752918-4-paweldembicki@gmail.com>
Date:   Tue, 12 Sep 2023 14:21:57 +0200
From:   Pawel Dembicki <paweldembicki@...il.com>
To:     netdev@...r.kernel.org
Cc:     Dan Carpenter <dan.carpenter@...aro.org>,
        Simon Horman <simon.horman@...igine.com>,
        Pawel Dembicki <paweldembicki@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next v3 3/8] net: dsa: vsc73xx: Add define for max num of ports

This patch introduces a new define: VSC73XX_MAX_NUM_PORTS, which can be
used in the future instead of a hardcoded value.

Currently, the only hardcoded value is vsc->ds->num_ports. It is being
replaced with the new define.

Suggested-by: Vladimir Oltean <olteanv@...il.com>
Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>

---
v3:
  - Introduce patch

 drivers/net/dsa/vitesse-vsc73xx-core.c | 13 +------------
 drivers/net/dsa/vitesse-vsc73xx.h      | 13 +++++++++++++
 2 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 39d3d78f4bc3..8f2285a03e82 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -1175,23 +1175,12 @@ int vsc73xx_probe(struct vsc73xx *vsc)
 		 vsc->addr[0], vsc->addr[1], vsc->addr[2],
 		 vsc->addr[3], vsc->addr[4], vsc->addr[5]);
 
-	/* The VSC7395 switch chips have 5+1 ports which means 5
-	 * ordinary ports and a sixth CPU port facing the processor
-	 * with an RGMII interface. These ports are numbered 0..4
-	 * and 6, so they leave a "hole" in the port map for port 5,
-	 * which is invalid.
-	 *
-	 * The VSC7398 has 8 ports, port 7 is again the CPU port.
-	 *
-	 * We allocate 8 ports and avoid access to the nonexistant
-	 * ports.
-	 */
 	vsc->ds = devm_kzalloc(dev, sizeof(*vsc->ds), GFP_KERNEL);
 	if (!vsc->ds)
 		return -ENOMEM;
 
 	vsc->ds->dev = dev;
-	vsc->ds->num_ports = 8;
+	vsc->ds->num_ports = VSC73XX_MAX_NUM_PORTS;
 	vsc->ds->priv = vsc;
 
 	vsc->ds->ops = &vsc73xx_ds_ops;
diff --git a/drivers/net/dsa/vitesse-vsc73xx.h b/drivers/net/dsa/vitesse-vsc73xx.h
index 30b1f0a36566..f79d81ef24fb 100644
--- a/drivers/net/dsa/vitesse-vsc73xx.h
+++ b/drivers/net/dsa/vitesse-vsc73xx.h
@@ -3,6 +3,19 @@
 #include <linux/etherdevice.h>
 #include <linux/gpio/driver.h>
 
+/* The VSC7395 switch chips have 5+1 ports which means 5
+ * ordinary ports and a sixth CPU port facing the processor
+ * with an RGMII interface. These ports are numbered 0..4
+ * and 6, so they leave a "hole" in the port map for port 5,
+ * which is invalid.
+ *
+ * The VSC7398 has 8 ports, port 7 is again the CPU port.
+ *
+ * We allocate 8 ports and avoid access to the nonexistant
+ * ports.
+ */
+#define VSC73XX_MAX_NUM_PORTS	8
+
 /**
  * struct vsc73xx - VSC73xx state container
  */
-- 
2.34.1