net: phy: Move of_mdio from drivers/of to drivers/net/mdio

Better place for of_mdio.c is drivers/net/mdio.
Move of_mdio.c from drivers/of to drivers/net/mdio

Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 0 insertions, 592 deletions

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
deleted file mode 100644
index 4daf94bb56a5..000000000000
--- a/drivers/of/of_mdio.c
+++ /dev/null
@@ -1,592 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * OF helpers for the MDIO (Ethernet PHY) API
- *
- * Copyright (c) 2009 Secret Lab Technologies, Ltd.
- *
- * This file provides helper functions for extracting PHY device information
- * out of the OpenFirmware device tree and using it to populate an mii_bus.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/netdevice.h>
-#include <linux/err.h>
-#include <linux/phy.h>
-#include <linux/phy_fixed.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/of_mdio.h>
-#include <linux/of_net.h>
-#include <linux/module.h>
-
-#define DEFAULT_GPIO_RESET_DELAY	10	/* in microseconds */
-
-MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
-MODULE_LICENSE("GPL");
-
-/* Extract the clause 22 phy ID from the compatible string of the form
- * ethernet-phy-idAAAA.BBBB */
-static int of_get_phy_id(struct device_node *device, u32 *phy_id)
-{
-	struct property *prop;
-	const char *cp;
-	unsigned int upper, lower;
-
-	of_property_for_each_string(device, "compatible", prop, cp) {
-		if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) == 2) {
-			*phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);
-			return 0;
-		}
-	}
-	return -EINVAL;
-}
-
-static struct mii_timestamper *of_find_mii_timestamper(struct device_node *node)
-{
-	struct of_phandle_args arg;
-	int err;
-
-	err = of_parse_phandle_with_fixed_args(node, "timestamper", 1, 0, &arg);
-
-	if (err == -ENOENT)
-		return NULL;
-	else if (err)
-		return ERR_PTR(err);
-
-	if (arg.args_count != 1)
-		return ERR_PTR(-EINVAL);
-
-	return register_mii_timestamper(arg.np, arg.args[0]);
-}
-
-int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
-			      struct device_node *child, u32 addr)
-{
-	int rc;
-
-	rc = of_irq_get(child, 0);
-	if (rc == -EPROBE_DEFER)
-		return rc;
-
-	if (rc > 0) {
-		phy->irq = rc;
-		mdio->irq[addr] = rc;
-	} else {
-		phy->irq = mdio->irq[addr];
-	}
-
-	if (of_property_read_bool(child, "broken-turn-around"))
-		mdio->phy_ignore_ta_mask |= 1 << addr;
-
-	of_property_read_u32(child, "reset-assert-us",
-			     &phy->mdio.reset_assert_delay);
-	of_property_read_u32(child, "reset-deassert-us",
-			     &phy->mdio.reset_deassert_delay);
-
-	/* Associate the OF node with the device structure so it
-	 * can be looked up later */
-	of_node_get(child);
-	phy->mdio.dev.of_node = child;
-	phy->mdio.dev.fwnode = of_fwnode_handle(child);
-
-	/* All data is now stored in the phy struct;
-	 * register it */
-	rc = phy_device_register(phy);
-	if (rc) {
-		of_node_put(child);
-		return rc;
-	}
-
-	dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n",
-		child, addr);
-	return 0;
-}
-EXPORT_SYMBOL(of_mdiobus_phy_device_register);
-
-static int of_mdiobus_register_phy(struct mii_bus *mdio,
-				    struct device_node *child, u32 addr)
-{
-	struct mii_timestamper *mii_ts;
-	struct phy_device *phy;
-	bool is_c45;
-	int rc;
-	u32 phy_id;
-
-	mii_ts = of_find_mii_timestamper(child);
-	if (IS_ERR(mii_ts))
-		return PTR_ERR(mii_ts);
-
-	is_c45 = of_device_is_compatible(child,
-					 "ethernet-phy-ieee802.3-c45");
-
-	if (!is_c45 && !of_get_phy_id(child, &phy_id))
-		phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
-	else
-		phy = get_phy_device(mdio, addr, is_c45);
-	if (IS_ERR(phy)) {
-		if (mii_ts)
-			unregister_mii_timestamper(mii_ts);
-		return PTR_ERR(phy);
-	}
-
-	rc = of_mdiobus_phy_device_register(mdio, phy, child, addr);
-	if (rc) {
-		if (mii_ts)
-			unregister_mii_timestamper(mii_ts);
-		phy_device_free(phy);
-		return rc;
-	}
-
-	/* phy->mii_ts may already be defined by the PHY driver. A
-	 * mii_timestamper probed via the device tree will still have
-	 * precedence.
-	 */
-	if (mii_ts)
-		phy->mii_ts = mii_ts;
-
-	return 0;
-}
-
-static int of_mdiobus_register_device(struct mii_bus *mdio,
-				      struct device_node *child, u32 addr)
-{
-	struct mdio_device *mdiodev;
-	int rc;
-
-	mdiodev = mdio_device_create(mdio, addr);
-	if (IS_ERR(mdiodev))
-		return PTR_ERR(mdiodev);
-
-	/* Associate the OF node with the device structure so it
-	 * can be looked up later.
-	 */
-	of_node_get(child);
-	mdiodev->dev.of_node = child;
-	mdiodev->dev.fwnode = of_fwnode_handle(child);
-
-	/* All data is now stored in the mdiodev struct; register it. */
-	rc = mdio_device_register(mdiodev);
-	if (rc) {
-		mdio_device_free(mdiodev);
-		of_node_put(child);
-		return rc;
-	}
-
-	dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",
-		child, addr);
-	return 0;
-}
-
-/* The following is a list of PHY compatible strings which appear in
- * some DTBs. The compatible string is never matched against a PHY
- * driver, so is pointless. We only expect devices which are not PHYs
- * to have a compatible string, so they can be matched to an MDIO
- * driver.  Encourage users to upgrade their DT blobs to remove these.
- */
-static const struct of_device_id whitelist_phys[] = {
-	{ .compatible = "brcm,40nm-ephy" },
-	{ .compatible = "broadcom,bcm5241" },
-	{ .compatible = "marvell,88E1111", },
-	{ .compatible = "marvell,88e1116", },
-	{ .compatible = "marvell,88e1118", },
-	{ .compatible = "marvell,88e1145", },
-	{ .compatible = "marvell,88e1149r", },
-	{ .compatible = "marvell,88e1310", },
-	{ .compatible = "marvell,88E1510", },
-	{ .compatible = "marvell,88E1514", },
-	{ .compatible = "moxa,moxart-rtl8201cp", },
-	{}
-};
-
-/*
- * Return true if the child node is for a phy. It must either:
- * o Compatible string of "ethernet-phy-idX.X"
- * o Compatible string of "ethernet-phy-ieee802.3-c45"
- * o Compatible string of "ethernet-phy-ieee802.3-c22"
- * o In the white list above (and issue a warning)
- * o No compatibility string
- *
- * A device which is not a phy is expected to have a compatible string
- * indicating what sort of device it is.
- */
-bool of_mdiobus_child_is_phy(struct device_node *child)
-{
-	u32 phy_id;
-
-	if (of_get_phy_id(child, &phy_id) != -EINVAL)
-		return true;
-
-	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))
-		return true;
-
-	if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))
-		return true;
-
-	if (of_match_node(whitelist_phys, child)) {
-		pr_warn(FW_WARN
-			"%pOF: Whitelisted compatible string. Please remove\n",
-			child);
-		return true;
-	}
-
-	if (!of_find_property(child, "compatible", NULL))
-		return true;
-
-	return false;
-}
-EXPORT_SYMBOL(of_mdiobus_child_is_phy);
-
-/**
- * of_mdiobus_register - Register mii_bus and create PHYs from the device tree
- * @mdio: pointer to mii_bus structure
- * @np: pointer to device_node of MDIO bus.
- *
- * This function registers the mii_bus structure and registers a phy_device
- * for each child node of @np.
- */
-int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
-{
-	struct device_node *child;
-	bool scanphys = false;
-	int addr, rc;
-
-	if (!np)
-		return mdiobus_register(mdio);
-
-	/* Do not continue if the node is disabled */
-	if (!of_device_is_available(np))
-		return -ENODEV;
-
-	/* Mask out all PHYs from auto probing.  Instead the PHYs listed in
-	 * the device tree are populated after the bus has been registered */
-	mdio->phy_mask = ~0;
-
-	mdio->dev.of_node = np;
-	mdio->dev.fwnode = of_fwnode_handle(np);
-
-	/* Get bus level PHY reset GPIO details */
-	mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;
-	of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);
-	mdio->reset_post_delay_us = 0;
-	of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);
-
-	/* Register the MDIO bus */
-	rc = mdiobus_register(mdio);
-	if (rc)
-		return rc;
-
-	/* Loop over the child nodes and register a phy_device for each phy */
-	for_each_available_child_of_node(np, child) {
-		addr = of_mdio_parse_addr(&mdio->dev, child);
-		if (addr < 0) {
-			scanphys = true;
-			continue;
-		}
-
-		if (of_mdiobus_child_is_phy(child))
-			rc = of_mdiobus_register_phy(mdio, child, addr);
-		else
-			rc = of_mdiobus_register_device(mdio, child, addr);
-
-		if (rc == -ENODEV)
-			dev_err(&mdio->dev,
-				"MDIO device at address %d is missing.\n",
-				addr);
-		else if (rc)
-			goto unregister;
-	}
-
-	if (!scanphys)
-		return 0;
-
-	/* auto scan for PHYs with empty reg property */
-	for_each_available_child_of_node(np, child) {
-		/* Skip PHYs with reg property set */
-		if (of_find_property(child, "reg", NULL))
-			continue;
-
-		for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
-			/* skip already registered PHYs */
-			if (mdiobus_is_registered_device(mdio, addr))
-				continue;
-
-			/* be noisy to encourage people to set reg property */
-			dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",
-				 child, addr);
-
-			if (of_mdiobus_child_is_phy(child)) {
-				/* -ENODEV is the return code that PHYLIB has
-				 * standardized on to indicate that bus
-				 * scanning should continue.
-				 */
-				rc = of_mdiobus_register_phy(mdio, child, addr);
-				if (!rc)
-					break;
-				if (rc != -ENODEV)
-					goto unregister;
-			}
-		}
-	}
-
-	return 0;
-
-unregister:
-	mdiobus_unregister(mdio);
-	return rc;
-}
-EXPORT_SYMBOL(of_mdiobus_register);
-
-/**
- * of_mdio_find_device - Given a device tree node, find the mdio_device
- * @np: pointer to the mdio_device's device tree node
- *
- * If successful, returns a pointer to the mdio_device with the embedded
- * struct device refcount incremented by one, or NULL on failure.
- * The caller should call put_device() on the mdio_device after its use
- */
-struct mdio_device *of_mdio_find_device(struct device_node *np)
-{
-	struct device *d;
-
-	if (!np)
-		return NULL;
-
-	d = bus_find_device_by_of_node(&mdio_bus_type, np);
-	if (!d)
-		return NULL;
-
-	return to_mdio_device(d);
-}
-EXPORT_SYMBOL(of_mdio_find_device);
-
-/**
- * of_phy_find_device - Give a PHY node, find the phy_device
- * @phy_np: Pointer to the phy's device tree node
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure.
- */
-struct phy_device *of_phy_find_device(struct device_node *phy_np)
-{
-	struct mdio_device *mdiodev;
-
-	mdiodev = of_mdio_find_device(phy_np);
-	if (!mdiodev)
-		return NULL;
-
-	if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
-		return to_phy_device(&mdiodev->dev);
-
-	put_device(&mdiodev->dev);
-
-	return NULL;
-}
-EXPORT_SYMBOL(of_phy_find_device);
-
-/**
- * of_phy_connect - Connect to the phy described in the device tree
- * @dev: pointer to net_device claiming the phy
- * @phy_np: Pointer to device tree node for the PHY
- * @hndlr: Link state callback for the network device
- * @flags: flags to pass to the PHY
- * @iface: PHY data interface type
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure. The
- * refcount must be dropped by calling phy_disconnect() or phy_detach().
- */
-struct phy_device *of_phy_connect(struct net_device *dev,
-				  struct device_node *phy_np,
-				  void (*hndlr)(struct net_device *), u32 flags,
-				  phy_interface_t iface)
-{
-	struct phy_device *phy = of_phy_find_device(phy_np);
-	int ret;
-
-	if (!phy)
-		return NULL;
-
-	phy->dev_flags |= flags;
-
-	ret = phy_connect_direct(dev, phy, hndlr, iface);
-
-	/* refcount is held by phy_connect_direct() on success */
-	put_device(&phy->mdio.dev);
-
-	return ret ? NULL : phy;
-}
-EXPORT_SYMBOL(of_phy_connect);
-
-/**
- * of_phy_get_and_connect
- * - Get phy node and connect to the phy described in the device tree
- * @dev: pointer to net_device claiming the phy
- * @np: Pointer to device tree node for the net_device claiming the phy
- * @hndlr: Link state callback for the network device
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure. The
- * refcount must be dropped by calling phy_disconnect() or phy_detach().
- */
-struct phy_device *of_phy_get_and_connect(struct net_device *dev,
-					  struct device_node *np,
-					  void (*hndlr)(struct net_device *))
-{
-	phy_interface_t iface;
-	struct device_node *phy_np;
-	struct phy_device *phy;
-	int ret;
-
-	ret = of_get_phy_mode(np, &iface);
-	if (ret)
-		return NULL;
-	if (of_phy_is_fixed_link(np)) {
-		ret = of_phy_register_fixed_link(np);
-		if (ret < 0) {
-			netdev_err(dev, "broken fixed-link specification\n");
-			return NULL;
-		}
-		phy_np = of_node_get(np);
-	} else {
-		phy_np = of_parse_phandle(np, "phy-handle", 0);
-		if (!phy_np)
-			return NULL;
-	}
-
-	phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);
-
-	of_node_put(phy_np);
-
-	return phy;
-}
-EXPORT_SYMBOL(of_phy_get_and_connect);
-
-/**
- * of_phy_attach - Attach to a PHY without starting the state machine
- * @dev: pointer to net_device claiming the phy
- * @phy_np: Node pointer for the PHY
- * @flags: flags to pass to the PHY
- * @iface: PHY data interface type
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure. The
- * refcount must be dropped by calling phy_disconnect() or phy_detach().
- */
-struct phy_device *of_phy_attach(struct net_device *dev,
-				 struct device_node *phy_np, u32 flags,
-				 phy_interface_t iface)
-{
-	struct phy_device *phy = of_phy_find_device(phy_np);
-	int ret;
-
-	if (!phy)
-		return NULL;
-
-	ret = phy_attach_direct(dev, phy, flags, iface);
-
-	/* refcount is held by phy_attach_direct() on success */
-	put_device(&phy->mdio.dev);
-
-	return ret ? NULL : phy;
-}
-EXPORT_SYMBOL(of_phy_attach);
-
-/*
- * of_phy_is_fixed_link() and of_phy_register_fixed_link() must
- * support two DT bindings:
- * - the old DT binding, where 'fixed-link' was a property with 5
- *   cells encoding various informations about the fixed PHY
- * - the new DT binding, where 'fixed-link' is a sub-node of the
- *   Ethernet device.
- */
-bool of_phy_is_fixed_link(struct device_node *np)
-{
-	struct device_node *dn;
-	int len, err;
-	const char *managed;
-
-	/* New binding */
-	dn = of_get_child_by_name(np, "fixed-link");
-	if (dn) {
-		of_node_put(dn);
-		return true;
-	}
-
-	err = of_property_read_string(np, "managed", &managed);
-	if (err == 0 && strcmp(managed, "auto") != 0)
-		return true;
-
-	/* Old binding */
-	if (of_get_property(np, "fixed-link", &len) &&
-	    len == (5 * sizeof(__be32)))
-		return true;
-
-	return false;
-}
-EXPORT_SYMBOL(of_phy_is_fixed_link);
-
-int of_phy_register_fixed_link(struct device_node *np)
-{
-	struct fixed_phy_status status = {};
-	struct device_node *fixed_link_node;
-	u32 fixed_link_prop[5];
-	const char *managed;
-
-	if (of_property_read_string(np, "managed", &managed) == 0 &&
-	    strcmp(managed, "in-band-status") == 0) {
-		/* status is zeroed, namely its .link member */
-		goto register_phy;
-	}
-
-	/* New binding */
-	fixed_link_node = of_get_child_by_name(np, "fixed-link");
-	if (fixed_link_node) {
-		status.link = 1;
-		status.duplex = of_property_read_bool(fixed_link_node,
-						      "full-duplex");
-		if (of_property_read_u32(fixed_link_node, "speed",
-					 &status.speed)) {
-			of_node_put(fixed_link_node);
-			return -EINVAL;
-		}
-		status.pause = of_property_read_bool(fixed_link_node, "pause");
-		status.asym_pause = of_property_read_bool(fixed_link_node,
-							  "asym-pause");
-		of_node_put(fixed_link_node);
-
-		goto register_phy;
-	}
-
-	/* Old binding */
-	if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,
-				       ARRAY_SIZE(fixed_link_prop)) == 0) {
-		status.link = 1;
-		status.duplex = fixed_link_prop[1];
-		status.speed  = fixed_link_prop[2];
-		status.pause  = fixed_link_prop[3];
-		status.asym_pause = fixed_link_prop[4];
-		goto register_phy;
-	}
-
-	return -ENODEV;
-
-register_phy:
-	return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np));
-}
-EXPORT_SYMBOL(of_phy_register_fixed_link);
-
-void of_phy_deregister_fixed_link(struct device_node *np)
-{
-	struct phy_device *phydev;
-
-	phydev = of_phy_find_device(np);
-	if (!phydev)
-		return;
-
-	fixed_phy_unregister(phydev);
-
-	put_device(&phydev->mdio.dev);	/* of_phy_find_device() */
-	phy_device_free(phydev);	/* fixed_phy_register() */
-}
-EXPORT_SYMBOL(of_phy_deregister_fixed_link);