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93 lines
2.4 KiB
Diff
93 lines
2.4 KiB
Diff
From a5538a777b73b35750ed1ffff8c1ef539e861624 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
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Date: Wed, 17 Mar 2021 10:23:17 +0100
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Subject: [PATCH] net: dsa: b53: mmap: Add device tree support
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Add device tree support to b53_mmap.c while keeping platform devices support.
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Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/dsa/b53/b53_mmap.c | 55 ++++++++++++++++++++++++++++++++++
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1 file changed, 55 insertions(+)
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--- a/drivers/net/dsa/b53/b53_mmap.c
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+++ b/drivers/net/dsa/b53/b53_mmap.c
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@@ -16,6 +16,7 @@
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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+#include <linux/bits.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/io.h>
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@@ -228,11 +229,65 @@ static const struct b53_io_ops b53_mmap_
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.write64 = b53_mmap_write64,
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};
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+static int b53_mmap_probe_of(struct platform_device *pdev,
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+ struct b53_platform_data **ppdata)
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+{
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+ struct device_node *np = pdev->dev.of_node;
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+ struct device_node *of_ports, *of_port;
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+ struct device *dev = &pdev->dev;
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+ struct b53_platform_data *pdata;
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+ void __iomem *mem;
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+
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+ mem = devm_platform_ioremap_resource(pdev, 0);
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+ if (IS_ERR(mem))
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+ return PTR_ERR(mem);
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+
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+ pdata = devm_kzalloc(dev, sizeof(struct b53_platform_data),
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+ GFP_KERNEL);
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+ if (!pdata)
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+ return -ENOMEM;
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+
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+ pdata->regs = mem;
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+ pdata->chip_id = BCM63XX_DEVICE_ID;
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+ pdata->big_endian = of_property_read_bool(np, "big-endian");
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+
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+ of_ports = of_get_child_by_name(np, "ports");
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+ if (!of_ports) {
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+ dev_err(dev, "no ports child node found\n");
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+ return -EINVAL;
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+ }
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+
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+ for_each_available_child_of_node(of_ports, of_port) {
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+ u32 reg;
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+
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+ if (of_property_read_u32(of_port, "reg", ®))
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+ continue;
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+
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+ if (reg < B53_CPU_PORT)
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+ pdata->enabled_ports |= BIT(reg);
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+ }
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+
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+ of_node_put(of_ports);
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+ *ppdata = pdata;
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+
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+ return 0;
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+}
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+
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static int b53_mmap_probe(struct platform_device *pdev)
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{
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+ struct device_node *np = pdev->dev.of_node;
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struct b53_platform_data *pdata = pdev->dev.platform_data;
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struct b53_mmap_priv *priv;
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struct b53_device *dev;
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+ int ret;
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+
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+ if (!pdata && np) {
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+ ret = b53_mmap_probe_of(pdev, &pdata);
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+ if (ret) {
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+ dev_err(&pdev->dev, "OF probe error\n");
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+ return ret;
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+ }
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+ }
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if (!pdata)
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return -EINVAL;
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