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From f5419e7f362ae1c462baf28a2da7360267f8e4f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
Date: Mon, 1 Mar 2021 07:32:32 +0100
Subject: [PATCH 2/3] net: dsa: b53: mmap: Add device tree support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add device tree support to b53_mmap.c while keeping platform devices support.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---
drivers/net/dsa/b53/b53_mmap.c | 36 ++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
--- a/drivers/net/dsa/b53/b53_mmap.c
+++ b/drivers/net/dsa/b53/b53_mmap.c
@@ -228,12 +228,64 @@ static const struct b53_io_ops b53_mmap_
.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 device_node *of_ports, *of_port;
+ 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_ports = of_get_child_by_name(np, "ports");
+ if (!of_ports) {
+ dev_err(dev, "no ports child node found\n");
+ return -EINVAL;
+ }
+
+ for_each_available_child_of_node(of_ports, of_port) {
+ u32 reg;
+
+ if (of_property_read_u32(of_port, "reg", ®))
+ continue;
+
+ if (reg < B53_CPU_PORT)
+ pdata->enabled_ports |= BIT(reg);
+ }
+
+ *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;
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