net: mdio: Move MDIO drivers into a new subdirectory

Move all the MDIO drivers and multiplexers into drivers/net/mdio.  The
mdio core is however left in the phy directory, due to mutual
dependencies between the MDIO core and the PHY core.

Take this opportunity to sort the Kconfig based on the menuconfig
strings, and move the multiplexers to the end with a separating
comment.

v2:
Fix typo in commit message

Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 115 insertions, 0 deletions

diff --git a/drivers/net/mdio/mdio-octeon.c b/drivers/net/mdio/mdio-octeon.c
new file mode 100644
index 000000000000..d1e1009d51af
--- /dev/null
+++ b/drivers/net/mdio/mdio-octeon.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2009-2015 Cavium, Inc.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/of_mdio.h>
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/phy.h>
+#include <linux/io.h>
+
+#include "mdio-cavium.h"
+
+static int octeon_mdiobus_probe(struct platform_device *pdev)
+{
+	struct cavium_mdiobus *bus;
+	struct mii_bus *mii_bus;
+	struct resource *res_mem;
+	resource_size_t mdio_phys;
+	resource_size_t regsize;
+	union cvmx_smix_en smi_en;
+	int err = -ENOENT;
+
+	mii_bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*bus));
+	if (!mii_bus)
+		return -ENOMEM;
+
+	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res_mem == NULL) {
+		dev_err(&pdev->dev, "found no memory resource\n");
+		return -ENXIO;
+	}
+
+	bus = mii_bus->priv;
+	bus->mii_bus = mii_bus;
+	mdio_phys = res_mem->start;
+	regsize = resource_size(res_mem);
+
+	if (!devm_request_mem_region(&pdev->dev, mdio_phys, regsize,
+				     res_mem->name)) {
+		dev_err(&pdev->dev, "request_mem_region failed\n");
+		return -ENXIO;
+	}
+
+	bus->register_base = devm_ioremap(&pdev->dev, mdio_phys, regsize);
+	if (!bus->register_base) {
+		dev_err(&pdev->dev, "dev_ioremap failed\n");
+		return -ENOMEM;
+	}
+
+	smi_en.u64 = 0;
+	smi_en.s.en = 1;
+	oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
+
+	bus->mii_bus->name = KBUILD_MODNAME;
+	snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%px", bus->register_base);
+	bus->mii_bus->parent = &pdev->dev;
+
+	bus->mii_bus->read = cavium_mdiobus_read;
+	bus->mii_bus->write = cavium_mdiobus_write;
+
+	platform_set_drvdata(pdev, bus);
+
+	err = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node);
+	if (err)
+		goto fail_register;
+
+	dev_info(&pdev->dev, "Probed\n");
+
+	return 0;
+fail_register:
+	mdiobus_free(bus->mii_bus);
+	smi_en.u64 = 0;
+	oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
+	return err;
+}
+
+static int octeon_mdiobus_remove(struct platform_device *pdev)
+{
+	struct cavium_mdiobus *bus;
+	union cvmx_smix_en smi_en;
+
+	bus = platform_get_drvdata(pdev);
+
+	mdiobus_unregister(bus->mii_bus);
+	mdiobus_free(bus->mii_bus);
+	smi_en.u64 = 0;
+	oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
+	return 0;
+}
+
+static const struct of_device_id octeon_mdiobus_match[] = {
+	{
+		.compatible = "cavium,octeon-3860-mdio",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, octeon_mdiobus_match);
+
+static struct platform_driver octeon_mdiobus_driver = {
+	.driver = {
+		.name		= KBUILD_MODNAME,
+		.of_match_table = octeon_mdiobus_match,
+	},
+	.probe		= octeon_mdiobus_probe,
+	.remove		= octeon_mdiobus_remove,
+};
+
+module_platform_driver(octeon_mdiobus_driver);
+
+MODULE_DESCRIPTION("Cavium OCTEON MDIO bus driver");
+MODULE_AUTHOR("David Daney");
+MODULE_LICENSE("GPL v2");