[PATCH] net: dsa: b53: mmap: Add device tree support

[Álvaro Fernández Rojas]

Add device tree support to b53_mmap.c while keeping platform devices support.

Signed-off-by: Álvaro Fernández Rojas <nolt...@gmail.com>
---
 drivers/net/dsa/b53/b53_mmap.c | 36 ++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/net/dsa/b53/b53_mmap.c b/drivers/net/dsa/b53/b53_mmap.c
index c628d0980c0b..b897b4263930 100644
--- a/drivers/net/dsa/b53/b53_mmap.c
+++ b/drivers/net/dsa/b53/b53_mmap.c
@@ -228,12 +228,48 @@ static const struct b53_io_ops b53_mmap_ops = {
        .write64 = b53_mmap_write64,
 };
 
+static int b53_mmap_probe_of(struct platform_device *pdev,
+                            struct b53_platform_data **ppdata)
+{
+       struct device *dev = &pdev->dev;
+       struct device_node *np = dev->of_node;
+       struct b53_platform_data *pdata;
+       void __iomem *mem;
+
+       mem = devm_platform_ioremap_resource(pdev, 0);
+       if (IS_ERR(mem))
+               return PTR_ERR(mem);
+
+       pdata = devm_kzalloc(dev, sizeof(struct b53_platform_data),
+                            GFP_KERNEL);
+       if (!pdata)
+               return -ENOMEM;
+
+       pdata->regs = mem;
+       pdata->chip_id = BCM63XX_DEVICE_ID;
+       pdata->big_endian = of_property_read_bool(np, "big-endian");
+       of_property_read_u16(np, "brcm,ports", &pdata->enabled_ports);
+
+       *ppdata = pdata;
+
+       return 0;
+}
+
 static int b53_mmap_probe(struct platform_device *pdev)
 {
+       struct device_node *np = pdev->dev.of_node;
        struct b53_platform_data *pdata = pdev->dev.platform_data;
        struct b53_mmap_priv *priv;
        struct b53_device *dev;
 
+       if (np) {
+               int ret = b53_mmap_probe_of(pdev, &pdata);
+               if (ret) {
+                       dev_err(&pdev->dev, "OF probe error\n");
+                       return ret;
+               }
+       }
+
        if (!pdata)
                return -EINVAL;
 
-- 
2.20.1