Subject: [PATCH net-next 2/8] net: dsa: b53: mmap: Add reference to bcm63xx gpio controller

From: Kyle Hendry <[email-masked]>
Date: Tue, 15 Jul 2025 17:29:01 -0700

On bcm63xx SoCs there are registers that control the PHYs in
the GPIO controller. Allow the b53 driver to access them
by passing in the syscon through the device tree.

Signed-off-by: Kyle Hendry <[email-masked]>
---
 drivers/net/dsa/b53/b53_mmap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/dsa/b53/b53_mmap.c b/drivers/net/dsa/b53/b53_mmap.c
index c687360a5b7f..a0c06d703861 100644
--- a/drivers/net/dsa/b53/b53_mmap.c
+++ b/drivers/net/dsa/b53/b53_mmap.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/io.h>
+#include <linux/mfd/syscon.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/b53.h>
 
@@ -28,6 +29,7 @@
 
 struct b53_mmap_priv {
 	void __iomem *regs;
+	struct regmap *gpio_ctrl;
 };
 
 static int b53_mmap_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
@@ -313,6 +315,8 @@ static int b53_mmap_probe(struct platform_device *pdev)
 
 	priv->regs = pdata->regs;
 
+	priv->gpio_ctrl = syscon_regmap_lookup_by_phandle(np, "brcm,gpio-ctrl");
+
 	dev = b53_switch_alloc(&pdev->dev, &b53_mmap_ops, priv);
 	if (!dev)
 		return -ENOMEM;
-- 
2.43.0