[RFC PATCH net-next 2/6] net: dsa: b53: mmap: Add reference to bcm63xx gpio controller

[Kyle Hendry <kylehendrydev@gmail.com>]

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 <kylehendrydev@gmail.com>
---
 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