linux-kernel - [PATCH 2/4] net: dsa: b53: mmap: Add gphy control register as a resource

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Message-ID: <20250206043055.177004-3-kylehendrydev@gmail.com>
Date: Wed,  5 Feb 2025 20:30:46 -0800
From: Kyle Hendry <kylehendrydev@...il.com>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
	Andrew Lunn <andrew@...n.ch>,
	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>,
	Russell King <linux@...linux.org.uk>
Cc: Kyle Hendry <kylehendrydev@...il.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] net: dsa: b53: mmap: Add gphy control register as a resource

Give b53 driver access to the gphy control register by passing
it in as an optional second reg in the device tree.

Signed-off-by: Kyle Hendry <kylehendrydev@...il.com>
---
 drivers/net/dsa/b53/b53_mmap.c    | 8 +++++++-
 include/linux/platform_data/b53.h | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/b53/b53_mmap.c b/drivers/net/dsa/b53/b53_mmap.c
index c687360a5b7f..8157f9871133 100644
--- a/drivers/net/dsa/b53/b53_mmap.c
+++ b/drivers/net/dsa/b53/b53_mmap.c
@@ -28,6 +28,7 @@
 
 struct b53_mmap_priv {
 	void __iomem *regs;
+	void __iomem *gphy_ctrl;
 };
 
 static int b53_mmap_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
@@ -251,7 +252,7 @@ static int b53_mmap_probe_of(struct platform_device *pdev,
 	struct device_node *of_ports, *of_port;
 	struct device *dev = &pdev->dev;
 	struct b53_platform_data *pdata;
-	void __iomem *mem;
+	void __iomem *mem, *gphy_ctrl;
 
 	mem = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(mem))
@@ -266,6 +267,10 @@ static int b53_mmap_probe_of(struct platform_device *pdev,
 	pdata->chip_id = (u32)(unsigned long)device_get_match_data(dev);
 	pdata->big_endian = of_property_read_bool(np, "big-endian");
 
+	gphy_ctrl = devm_platform_ioremap_resource(pdev, 1);
+	if (!IS_ERR(gphy_ctrl))
+		pdata->gphy_ctrl = gphy_ctrl;
+
 	of_ports = of_get_child_by_name(np, "ports");
 	if (!of_ports) {
 		dev_err(dev, "no ports child node found\n");
@@ -312,6 +317,7 @@ static int b53_mmap_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	priv->regs = pdata->regs;
+	priv->gphy_ctrl = pdata->gphy_ctrl;
 
 	dev = b53_switch_alloc(&pdev->dev, &b53_mmap_ops, priv);
 	if (!dev)
diff --git a/include/linux/platform_data/b53.h b/include/linux/platform_data/b53.h
index 6f6fed2b171d..ed73287e8ac5 100644
--- a/include/linux/platform_data/b53.h
+++ b/include/linux/platform_data/b53.h
@@ -32,6 +32,7 @@ struct b53_platform_data {
 	/* only used by MMAP'd driver */
 	unsigned big_endian:1;
 	void __iomem *regs;
+	void __iomem *gphy_ctrl;
 };
 
 #endif
-- 
2.43.0