netdev - [net-next PATCH 05/19] net: dsa: qca8k: move read switch id function in qca8k

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Date:   Wed, 17 Nov 2021 22:04:37 +0100
From:   Ansuel Smith <ansuelsmth@...il.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>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Ansuel Smith <ansuelsmth@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [net-next PATCH 05/19] net: dsa: qca8k: move read switch id function in qca8k_setup

Move read_switch_id function in qca8k_setup in preparation for regmap
conversion. Sw probe should NOT contain function that depends on reading
from switch regs.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 drivers/net/dsa/qca8k.c | 71 ++++++++++++++++++++---------------------
 1 file changed, 35 insertions(+), 36 deletions(-)

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 19331edf1fd4..be98d11b17ec 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -1073,6 +1073,36 @@ qca8k_parse_port_config(struct qca8k_priv *priv)
 	return 0;
 }
 
+static int qca8k_read_switch_id(struct qca8k_priv *priv)
+{
+	const struct qca8k_match_data *data;
+	u32 val;
+	u8 id;
+	int ret;
+
+	/* get the switches ID from the compatible */
+	data = of_device_get_match_data(priv->dev);
+	if (!data)
+		return -ENODEV;
+
+	ret = qca8k_read(priv, QCA8K_REG_MASK_CTRL, &val);
+	if (ret < 0)
+		return -ENODEV;
+
+	id = QCA8K_MASK_CTRL_DEVICE_ID(val);
+	if (id != data->id) {
+		dev_err(priv->dev, "Switch id detected %x but expected %x", id, data->id);
+		return -ENODEV;
+	}
+
+	priv->switch_id = id;
+
+	/* Save revision to communicate to the internal PHY driver */
+	priv->switch_revision = QCA8K_MASK_CTRL_REV_ID(val);
+
+	return 0;
+}
+
 static int
 qca8k_setup(struct dsa_switch *ds)
 {
@@ -1080,6 +1110,11 @@ qca8k_setup(struct dsa_switch *ds)
 	int cpu_port, ret, i;
 	u32 mask;
 
+	/* Check the detected switch id */
+	ret = qca8k_read_switch_id(priv);
+	if (ret)
+		return ret;
+
 	cpu_port = qca8k_find_cpu_port(ds);
 	if (cpu_port < 0) {
 		dev_err(priv->dev, "No cpu port configured in both cpu port0 and port6");
@@ -2023,41 +2058,10 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
 	.get_phy_flags		= qca8k_get_phy_flags,
 };
 
-static int qca8k_read_switch_id(struct qca8k_priv *priv)
-{
-	const struct qca8k_match_data *data;
-	u32 val;
-	u8 id;
-	int ret;
-
-	/* get the switches ID from the compatible */
-	data = of_device_get_match_data(priv->dev);
-	if (!data)
-		return -ENODEV;
-
-	ret = qca8k_read(priv, QCA8K_REG_MASK_CTRL, &val);
-	if (ret < 0)
-		return -ENODEV;
-
-	id = QCA8K_MASK_CTRL_DEVICE_ID(val);
-	if (id != data->id) {
-		dev_err(priv->dev, "Switch id detected %x but expected %x", id, data->id);
-		return -ENODEV;
-	}
-
-	priv->switch_id = id;
-
-	/* Save revision to communicate to the internal PHY driver */
-	priv->switch_revision = QCA8K_MASK_CTRL_REV_ID(val);
-
-	return 0;
-}
-
 static int
 qca8k_sw_probe(struct mdio_device *mdiodev)
 {
 	struct qca8k_priv *priv;
-	int ret;
 
 	/* allocate the private data struct so that we can probe the switches
 	 * ID register
@@ -2083,11 +2087,6 @@ qca8k_sw_probe(struct mdio_device *mdiodev)
 		gpiod_set_value_cansleep(priv->reset_gpio, 0);
 	}
 
-	/* Check the detected switch id */
-	ret = qca8k_read_switch_id(priv);
-	if (ret)
-		return ret;
-
 	priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL);
 	if (!priv->ds)
 		return -ENOMEM;
-- 
2.32.0