+++ /dev/null
-This document explains only the device tree data binding. For general
-information about PHY subsystem refer to Documentation/phy.txt
-
-PHY device node
-===============
-
-Required Properties:
-#phy-cells: Number of cells in a PHY specifier; The meaning of all those
- cells is defined by the binding for the phy node. The PHY
- provider can use the values in cells to find the appropriate
- PHY.
-
-For example:
-
-phys: phy {
- compatible = "xxx";
- reg = <...>;
- .
- .
- #phy-cells = <1>;
- .
- .
-};
-
-That node describes an IP block (PHY provider) that implements 2 different PHYs.
-In order to differentiate between these 2 PHYs, an additonal specifier should be
-given while trying to get a reference to it.
-
-PHY user node
-=============
-
-Required Properties:
-phys : the phandle for the PHY device (used by the PHY subsystem)
-phy-names : the names of the PHY corresponding to the PHYs present in the
- *phys* phandle
-
-Example 1:
-usb1: usb_otg_ss@xxx {
- compatible = "xxx";
- reg = <xxx>;
- .
- .
- phys = <&usb2_phy>, <&usb3_phy>;
- phy-names = "usb2phy", "usb3phy";
- .
- .
-};
-
-This node represents a controller that uses two PHYs, one for usb2 and one for
-usb3.
-
-Example 2:
-usb2: usb_otg_ss@xxx {
- compatible = "xxx";
- reg = <xxx>;
- .
- .
- phys = <&phys 1>;
- phy-names = "usbphy";
- .
- .
-};
-
-This node represents a controller that uses one of the PHYs of the PHY provider
-device defined previously. Note that the phy handle has an additional specifier
-"1" to differentiate between the two PHYs.
+++ /dev/null
- PHY SUBSYSTEM
- Kishon Vijay Abraham I <kishon@ti.com>
-
-This document explains the Generic PHY Framework along with the APIs provided,
-and how-to-use.
-
-1. Introduction
-
-*PHY* is the abbreviation for physical layer. It is used to connect a device
-to the physical medium e.g., the USB controller has a PHY to provide functions
-such as serialization, de-serialization, encoding, decoding and is responsible
-for obtaining the required data transmission rate. Note that some USB
-controllers have PHY functionality embedded into it and others use an external
-PHY. Other peripherals that use PHY include Wireless LAN, Ethernet,
-SATA etc.
-
-The intention of creating this framework is to bring the PHY drivers spread
-all over the Linux kernel to drivers/phy to increase code re-use and for
-better code maintainability.
-
-This framework will be of use only to devices that use external PHY (PHY
-functionality is not embedded within the controller).
-
-2. Registering/Unregistering the PHY provider
-
-PHY provider refers to an entity that implements one or more PHY instances.
-For the simple case where the PHY provider implements only a single instance of
-the PHY, the framework provides its own implementation of of_xlate in
-of_phy_simple_xlate. If the PHY provider implements multiple instances, it
-should provide its own implementation of of_xlate. of_xlate is used only for
-dt boot case.
-
-struct phy_provider *__of_phy_provider_register(struct device *dev,
- struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args));
-struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
- struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args))
-
-__of_phy_provider_register and __devm_of_phy_provider_register can be used to
-register the phy_provider and it takes device, owner and of_xlate as
-arguments. For the dt boot case, all PHY providers should use one of the above
-2 APIs to register the PHY provider.
-
-void devm_of_phy_provider_unregister(struct device *dev,
- struct phy_provider *phy_provider);
-void of_phy_provider_unregister(struct phy_provider *phy_provider);
-
-devm_of_phy_provider_unregister and of_phy_provider_unregister can be used to
-unregister the PHY.
-
-3. Creating the PHY
-
-The PHY driver should create the PHY in order for other peripheral controllers
-to make use of it. The PHY framework provides 2 APIs to create the PHY.
-
-struct phy *phy_create(struct device *dev, u8 id, const struct phy_ops *ops,
- const char *label);
-extern struct phy *devm_phy_create(struct device *dev, u8 id,
- const struct phy_ops *ops, const char *label);
-
-The PHY drivers can use one of the above 2 APIs to create the PHY by passing
-the device pointer, id, phy ops, label and a driver data.
-phy_ops is a set of function pointers for performing PHY operations such as
-init, exit, power_on and power_off. *label* is mandatory for non-dt boot case
-and it should be unique as well.
-
-Inorder to dereference the private data (in phy_ops), the phy provider driver
-can use phy_set_drvdata() after creating the PHY and use phy_get_drvdata() in
-phy_ops to get back the private data.
-
-4. Getting a reference to the PHY
-
-Before the controller can make use of the PHY, it has to get a reference to
-it. This framework provides the following APIs to get a reference to the PHY.
-
-struct phy *phy_get(struct device *dev, const char *string);
-struct phy *devm_phy_get(struct device *dev, const char *string);
-
-phy_get and devm_phy_get can be used to get the PHY. In the case of dt boot,
-the string arguments should contain the phy name as given in the dt data and
-in the case of non-dt boot, it should contain the label of the PHY.
-The only difference between the two APIs is that devm_phy_get associates the
-device with the PHY using devres on successful PHY get. On driver detach,
-release function is invoked on the the devres data and devres data is freed.
-
-5. Releasing a reference to the PHY
-
-When the controller no longer needs the PHY, it has to release the reference
-to the PHY it has obtained using the APIs mentioned in the above section. The
-PHY framework provides 2 APIs to release a reference to the PHY.
-
-void phy_put(struct phy *phy);
-void devm_phy_put(struct device *dev, struct phy *phy);
-
-Both these APIs are used to release a reference to the PHY and devm_phy_put
-destroys the devres associated with this PHY.
-
-6. Destroying the PHY
-
-When the driver that created the PHY is unloaded, it should destroy the PHY it
-created using one of the following 2 APIs.
-
-void phy_destroy(struct phy *phy);
-void devm_phy_destroy(struct device *dev, struct phy *phy);
-
-Both these APIs destroy the PHY and devm_phy_destroy destroys the devres
-associated with this PHY.
-
-7. PM Runtime
-
-This subsystem is pm runtime enabled. So while creating the PHY,
-pm_runtime_enable of the phy device created by this subsystem is called and
-while destroying the PHY, pm_runtime_disable is called. Note that the phy
-device created by this subsystem will be a child of the device that calls
-phy_create (PHY provider device).
-
-So pm_runtime_get_sync of the phy_device created by this subsystem will invoke
-pm_runtime_get_sync of PHY provider device because of parent-child relationship.
-It should also be noted that phy_power_on and phy_power_off performs
-phy_pm_runtime_get_sync and phy_pm_runtime_put respectively.
-There are exported APIs like phy_pm_runtime_get, phy_pm_runtime_get_sync,
-phy_pm_runtime_put, phy_pm_runtime_put_sync, phy_pm_runtime_allow and
-phy_pm_runtime_forbid for performing PM operations.
-
-8. DeviceTree Binding
-
-The documentation for PHY dt binding can be found @
-Documentation/devicetree/bindings/phy/phy-bindings.txt
F: include/asm-generic
F: include/uapi/asm-generic
-GENERIC PHY FRAMEWORK
-M: Kishon Vijay Abraham I <kishon@ti.com>
-L: linux-kernel@vger.kernel.org
-S: Supported
-F: drivers/phy/
-F: include/linux/phy/
-
GENERIC UIO DRIVER FOR PCI DEVICES
M: "Michael S. Tsirkin" <mst@redhat.com>
L: kvm@vger.kernel.org
source "drivers/reset/Kconfig"
-source "drivers/phy/Kconfig"
-
endmenu
obj-y += irqchip/
obj-y += bus/
-obj-$(CONFIG_GENERIC_PHY) += phy/
-
# GPIO must come after pinctrl as gpios may need to mux pins etc
obj-y += pinctrl/
obj-y += gpio/
+++ /dev/null
-#
-# PHY
-#
-
-menuconfig GENERIC_PHY
- tristate "PHY Subsystem"
- help
- Generic PHY support.
-
- This framework is designed to provide a generic interface for PHY
- devices present in the kernel. This layer will have the generic
- API by which phy drivers can create PHY using the phy framework and
- phy users can obtain reference to the PHY.
+++ /dev/null
-#
-# Makefile for the phy drivers.
-#
-
-obj-$(CONFIG_GENERIC_PHY) += phy-core.o
+++ /dev/null
-/*
- * phy-core.c -- Generic Phy framework.
- *
- * Copyright (C) 2013 Texas Instruments
- *
- * Author: Kishon Vijay Abraham I <kishon@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <linux/phy/phy.h>
-#include <linux/pm_runtime.h>
-
-static struct class *phy_class;
-static DEFINE_MUTEX(phy_provider_mutex);
-static LIST_HEAD(phy_provider_list);
-
-static void devm_phy_release(struct device *dev, void *res)
-{
- struct phy *phy = *(struct phy **)res;
-
- phy_put(phy);
-}
-
-static void devm_phy_provider_release(struct device *dev, void *res)
-{
- struct phy_provider *phy_provider = *(struct phy_provider **)res;
-
- of_phy_provider_unregister(phy_provider);
-}
-
-static void devm_phy_consume(struct device *dev, void *res)
-{
- struct phy *phy = *(struct phy **)res;
-
- phy_destroy(phy);
-}
-
-static int devm_phy_match(struct device *dev, void *res, void *match_data)
-{
- return res == match_data;
-}
-
-static struct phy *phy_lookup(const char *phy_name)
-{
- struct phy *phy;
- struct device *dev;
- struct class_dev_iter iter;
-
- class_dev_iter_init(&iter, phy_class, NULL, NULL);
- while ((dev = class_dev_iter_next(&iter))) {
- phy = to_phy(dev);
- if (strcmp(phy->label, phy_name))
- continue;
-
- class_dev_iter_exit(&iter);
- return phy;
- }
-
- class_dev_iter_exit(&iter);
- return ERR_PTR(-ENODEV);
-}
-
-static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
-{
- struct phy_provider *phy_provider;
-
- list_for_each_entry(phy_provider, &phy_provider_list, list) {
- if (phy_provider->dev->of_node == node)
- return phy_provider;
- }
-
- return ERR_PTR(-EPROBE_DEFER);
-}
-
-/**
- * of_phy_get() - lookup and obtain a reference to a phy by phandle
- * @dev: device that requests this phy
- * @index: the index of the phy
- *
- * Returns the phy associated with the given phandle value,
- * after getting a refcount to it or -ENODEV if there is no such phy or
- * -EPROBE_DEFER if there is a phandle to the phy, but the device is
- * not yet loaded. This function uses of_xlate call back function provided
- * while registering the phy_provider to find the phy instance.
- */
-static struct phy *of_phy_get(struct device *dev, int index)
-{
- int ret;
- struct phy_provider *phy_provider;
- struct phy *phy = NULL;
- struct of_phandle_args args;
-
- ret = of_parse_phandle_with_args(dev->of_node, "phys", "#phy-cells",
- index, &args);
- if (ret) {
- dev_dbg(dev, "failed to get phy in %s node\n",
- dev->of_node->full_name);
- return ERR_PTR(-ENODEV);
- }
-
- mutex_lock(&phy_provider_mutex);
- phy_provider = of_phy_provider_lookup(args.np);
- if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
- phy = ERR_PTR(-EPROBE_DEFER);
- goto err0;
- }
-
- phy = phy_provider->of_xlate(phy_provider->dev, &args);
- module_put(phy_provider->owner);
-
-err0:
- mutex_unlock(&phy_provider_mutex);
- of_node_put(args.np);
-
- return phy;
-}
-
-/**
- * phy_put() - release the PHY
- * @phy: the phy returned by phy_get()
- *
- * Releases a refcount the caller received from phy_get().
- */
-void phy_put(struct phy *phy)
-{
- if (IS_ERR(phy))
- return;
-
- module_put(phy->ops->owner);
- put_device(&phy->dev);
-}
-EXPORT_SYMBOL_GPL(phy_put);
-
-/**
- * devm_phy_put() - release the PHY
- * @dev: device that wants to release this phy
- * @phy: the phy returned by devm_phy_get()
- *
- * destroys the devres associated with this phy and invokes phy_put
- * to release the phy.
- */
-void devm_phy_put(struct device *dev, struct phy *phy)
-{
- int r;
-
- r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy);
- dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
-}
-EXPORT_SYMBOL_GPL(devm_phy_put);
-
-/**
- * of_phy_simple_xlate() - returns the phy instance from phy provider
- * @dev: the PHY provider device
- * @args: of_phandle_args (not used here)
- *
- * Intended to be used by phy provider for the common case where #phy-cells is
- * 0. For other cases where #phy-cells is greater than '0', the phy provider
- * should provide a custom of_xlate function that reads the *args* and returns
- * the appropriate phy.
- */
-struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args
- *args)
-{
- struct phy *phy;
- struct class_dev_iter iter;
- struct device_node *node = dev->of_node;
-
- class_dev_iter_init(&iter, phy_class, NULL, NULL);
- while ((dev = class_dev_iter_next(&iter))) {
- phy = to_phy(dev);
- if (node != phy->dev.of_node)
- continue;
-
- class_dev_iter_exit(&iter);
- return phy;
- }
-
- class_dev_iter_exit(&iter);
- return ERR_PTR(-ENODEV);
-}
-EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
-
-/**
- * phy_get() - lookup and obtain a reference to a phy.
- * @dev: device that requests this phy
- * @string: the phy name as given in the dt data or phy device name
- * for non-dt case
- *
- * Returns the phy driver, after getting a refcount to it; or
- * -ENODEV if there is no such phy. The caller is responsible for
- * calling phy_put() to release that count.
- */
-struct phy *phy_get(struct device *dev, const char *string)
-{
- int index = 0;
- struct phy *phy = NULL;
-
- if (string == NULL) {
- dev_WARN(dev, "missing string\n");
- return ERR_PTR(-EINVAL);
- }
-
- if (dev->of_node) {
- index = of_property_match_string(dev->of_node, "phy-names",
- string);
- phy = of_phy_get(dev, index);
- if (IS_ERR(phy)) {
- dev_WARN(dev, "unable to find phy\n");
- return phy;
- }
- } else {
- phy = phy_lookup(string);
- if (IS_ERR(phy)) {
- dev_WARN(dev, "unable to find phy\n");
- return phy;
- }
- }
-
- if (!try_module_get(phy->ops->owner))
- return ERR_PTR(-EPROBE_DEFER);
-
- get_device(&phy->dev);
-
- return phy;
-}
-EXPORT_SYMBOL_GPL(phy_get);
-
-/**
- * devm_phy_get() - lookup and obtain a reference to a phy.
- * @dev: device that requests this phy
- * @string: the phy name as given in the dt data or phy device name
- * for non-dt case
- *
- * Gets the phy using phy_get(), and associates a device with it using
- * devres. On driver detach, release function is invoked on the devres data,
- * then, devres data is freed.
- */
-struct phy *devm_phy_get(struct device *dev, const char *string)
-{
- struct phy **ptr, *phy;
-
- ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- phy = phy_get(dev, string);
- if (!IS_ERR(phy)) {
- *ptr = phy;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
-
- return phy;
-}
-EXPORT_SYMBOL_GPL(devm_phy_get);
-
-/**
- * phy_create() - create a new phy
- * @dev: device that is creating the new phy
- * @id: id of the phy
- * @ops: function pointers for performing phy operations
- * @label: label given to the phy
- *
- * Called to create a phy using phy framework.
- */
-struct phy *phy_create(struct device *dev, u8 id, const struct phy_ops *ops,
- const char *label)
-{
- int ret;
- struct phy *phy;
-
- if (!dev) {
- dev_WARN(dev, "no device provided for PHY\n");
- ret = -EINVAL;
- goto err0;
- }
-
- phy = kzalloc(sizeof(*phy), GFP_KERNEL);
- if (!phy) {
- ret = -ENOMEM;
- goto err0;
- }
-
- device_initialize(&phy->dev);
- mutex_init(&phy->mutex);
-
- phy->dev.class = phy_class;
- phy->dev.parent = dev;
- phy->dev.of_node = dev->of_node;
- phy->id = id;
- phy->ops = ops;
- phy->label = kstrdup(label, GFP_KERNEL);
-
- ret = dev_set_name(&phy->dev, "%s.%d", dev_name(dev), id);
- if (ret)
- goto err1;
-
- ret = device_add(&phy->dev);
- if (ret)
- goto err1;
-
- if (pm_runtime_enabled(dev)) {
- pm_runtime_enable(&phy->dev);
- pm_runtime_no_callbacks(&phy->dev);
- }
-
- return phy;
-
-err1:
- put_device(&phy->dev);
- kfree(phy->label);
- kfree(phy);
-
-err0:
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(phy_create);
-
-/**
- * devm_phy_create() - create a new phy
- * @dev: device that is creating the new phy
- * @id: id of the phy
- * @ops: function pointers for performing phy operations
- * @label: label given to the phy
- *
- * Creates a new PHY device adding it to the PHY class.
- * While at that, it also associates the device with the phy using devres.
- * On driver detach, release function is invoked on the devres data,
- * then, devres data is freed.
- */
-struct phy *devm_phy_create(struct device *dev, u8 id,
- const struct phy_ops *ops, const char *label)
-{
- struct phy **ptr, *phy;
-
- ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- phy = phy_create(dev, id, ops, label);
- if (!IS_ERR(phy)) {
- *ptr = phy;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
-
- return phy;
-}
-EXPORT_SYMBOL_GPL(devm_phy_create);
-
-/**
- * phy_destroy() - destroy the phy
- * @phy: the phy to be destroyed
- *
- * Called to destroy the phy.
- */
-void phy_destroy(struct phy *phy)
-{
- pm_runtime_disable(&phy->dev);
- device_unregister(&phy->dev);
-}
-EXPORT_SYMBOL_GPL(phy_destroy);
-
-/**
- * devm_phy_destroy() - destroy the PHY
- * @dev: device that wants to release this phy
- * @phy: the phy returned by devm_phy_get()
- *
- * destroys the devres associated with this phy and invokes phy_destroy
- * to destroy the phy.
- */
-void devm_phy_destroy(struct device *dev, struct phy *phy)
-{
- int r;
-
- r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
- dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
-}
-EXPORT_SYMBOL_GPL(devm_phy_destroy);
-
-/**
- * __of_phy_provider_register() - create/register phy provider with the framework
- * @dev: struct device of the phy provider
- * @owner: the module owner containing of_xlate
- * @of_xlate: function pointer to obtain phy instance from phy provider
- *
- * Creates struct phy_provider from dev and of_xlate function pointer.
- * This is used in the case of dt boot for finding the phy instance from
- * phy provider.
- */
-struct phy_provider *__of_phy_provider_register(struct device *dev,
- struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args))
-{
- struct phy_provider *phy_provider;
-
- phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL);
- if (!phy_provider)
- return ERR_PTR(-ENOMEM);
-
- phy_provider->dev = dev;
- phy_provider->owner = owner;
- phy_provider->of_xlate = of_xlate;
-
- mutex_lock(&phy_provider_mutex);
- list_add_tail(&phy_provider->list, &phy_provider_list);
- mutex_unlock(&phy_provider_mutex);
-
- return phy_provider;
-}
-EXPORT_SYMBOL_GPL(__of_phy_provider_register);
-
-/**
- * __devm_of_phy_provider_register() - create/register phy provider with the
- * framework
- * @dev: struct device of the phy provider
- * @owner: the module owner containing of_xlate
- * @of_xlate: function pointer to obtain phy instance from phy provider
- *
- * Creates struct phy_provider from dev and of_xlate function pointer.
- * This is used in the case of dt boot for finding the phy instance from
- * phy provider. While at that, it also associates the device with the
- * phy provider using devres. On driver detach, release function is invoked
- * on the devres data, then, devres data is freed.
- */
-struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
- struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args))
-{
- struct phy_provider **ptr, *phy_provider;
-
- ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- phy_provider = __of_phy_provider_register(dev, owner, of_xlate);
- if (!IS_ERR(phy_provider)) {
- *ptr = phy_provider;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
-
- return phy_provider;
-}
-EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register);
-
-/**
- * of_phy_provider_unregister() - unregister phy provider from the framework
- * @phy_provider: phy provider returned by of_phy_provider_register()
- *
- * Removes the phy_provider created using of_phy_provider_register().
- */
-void of_phy_provider_unregister(struct phy_provider *phy_provider)
-{
- if (IS_ERR(phy_provider))
- return;
-
- mutex_lock(&phy_provider_mutex);
- list_del(&phy_provider->list);
- kfree(phy_provider);
- mutex_unlock(&phy_provider_mutex);
-}
-EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
-
-/**
- * devm_of_phy_provider_unregister() - remove phy provider from the framework
- * @dev: struct device of the phy provider
- *
- * destroys the devres associated with this phy provider and invokes
- * of_phy_provider_unregister to unregister the phy provider.
- */
-void devm_of_phy_provider_unregister(struct device *dev,
- struct phy_provider *phy_provider) {
- int r;
-
- r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
- phy_provider);
- dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
-}
-EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
-
-/**
- * phy_release() - release the phy
- * @dev: the dev member within phy
- *
- * When the last reference to the device is removed, it is called
- * from the embedded kobject as release method.
- */
-static void phy_release(struct device *dev)
-{
- struct phy *phy;
-
- phy = to_phy(dev);
- dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
- kfree(phy->label);
- kfree(phy);
-}
-
-static int __init phy_core_init(void)
-{
- phy_class = class_create(THIS_MODULE, "phy");
- if (IS_ERR(phy_class)) {
- pr_err("failed to create phy class --> %ld\n",
- PTR_ERR(phy_class));
- return PTR_ERR(phy_class);
- }
-
- phy_class->dev_release = phy_release;
-
- return 0;
-}
-module_init(phy_core_init);
-
-static void __exit phy_core_exit(void)
-{
- class_destroy(phy_class);
-}
-module_exit(phy_core_exit);
-
-MODULE_DESCRIPTION("Generic PHY Framework");
-MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/*
- * phy.h -- generic phy header file
- *
- * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Author: Kishon Vijay Abraham I <kishon@ti.com>
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __DRIVERS_PHY_H
-#define __DRIVERS_PHY_H
-
-#include <linux/err.h>
-#include <linux/of.h>
-#include <linux/device.h>
-#include <linux/pm_runtime.h>
-
-struct phy;
-
-/**
- * struct phy_ops - set of function pointers for performing phy operations
- * @init: operation to be performed for initializing phy
- * @exit: operation to be performed while exiting
- * @power_on: powering on the phy
- * @power_off: powering off the phy
- * @owner: the module owner containing the ops
- */
-struct phy_ops {
- int (*init)(struct phy *phy);
- int (*exit)(struct phy *phy);
- int (*power_on)(struct phy *phy);
- int (*power_off)(struct phy *phy);
- struct module *owner;
-};
-
-/**
- * struct phy - represents the phy device
- * @dev: phy device
- * @id: id of the phy
- * @ops: function pointers for performing phy operations
- * @label: label given to the phy
- * @mutex: mutex to protect phy_ops
- * @init_count: used to protect when the PHY is used by multiple consumers
- * @power_count: used to protect when the PHY is used by multiple consumers
- */
-struct phy {
- struct device dev;
- int id;
- const struct phy_ops *ops;
- const char *label;
- struct mutex mutex;
- int init_count;
- int power_count;
-};
-
-/**
- * struct phy_provider - represents the phy provider
- * @dev: phy provider device
- * @owner: the module owner having of_xlate
- * @of_xlate: function pointer to obtain phy instance from phy pointer
- * @list: to maintain a linked list of PHY providers
- */
-struct phy_provider {
- struct device *dev;
- struct module *owner;
- struct list_head list;
- struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args);
-};
-
-#define to_phy(dev) (container_of((dev), struct phy, dev))
-
-#define of_phy_provider_register(dev, xlate) \
- __of_phy_provider_register((dev), THIS_MODULE, (xlate))
-
-#define devm_of_phy_provider_register(dev, xlate) \
- __of_phy_provider_register((dev), THIS_MODULE, (xlate))
-
-static inline void phy_set_drvdata(struct phy *phy, void *data)
-{
- dev_set_drvdata(&phy->dev, data);
-}
-
-static inline void *phy_get_drvdata(struct phy *phy)
-{
- return dev_get_drvdata(&phy->dev);
-}
-
-#if IS_ENABLED(CONFIG_GENERIC_PHY)
-extern struct phy *phy_get(struct device *dev, const char *string);
-extern struct phy *devm_phy_get(struct device *dev, const char *string);
-extern void phy_put(struct phy *phy);
-extern void devm_phy_put(struct device *dev, struct phy *phy);
-extern struct phy *of_phy_simple_xlate(struct device *dev,
- struct of_phandle_args *args);
-extern struct phy *phy_create(struct device *dev, u8 id,
- const struct phy_ops *ops, const char *label);
-extern struct phy *devm_phy_create(struct device *dev, u8 id,
- const struct phy_ops *ops, const char *label);
-extern void phy_destroy(struct phy *phy);
-extern void devm_phy_destroy(struct device *dev, struct phy *phy);
-extern struct phy_provider *__of_phy_provider_register(struct device *dev,
- struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args));
-extern struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
- struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args));
-extern void of_phy_provider_unregister(struct phy_provider *phy_provider);
-extern void devm_of_phy_provider_unregister(struct device *dev,
- struct phy_provider *phy_provider);
-#else
-static inline struct phy *phy_get(struct device *dev, const char *string)
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline struct phy *devm_phy_get(struct device *dev, const char *string)
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline void phy_put(struct phy *phy)
-{
-}
-
-static inline void devm_phy_put(struct device *dev, struct phy *phy)
-{
-}
-
-static inline struct phy *of_phy_simple_xlate(struct device *dev,
- struct of_phandle_args *args)
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline struct phy *phy_create(struct device *dev, u8 id,
- const struct phy_ops *ops, const char *label)
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline struct phy *devm_phy_create(struct device *dev, u8 id,
- const struct phy_ops *ops, const char *label)
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline void phy_destroy(struct phy *phy)
-{
-}
-
-static inline void devm_phy_destroy(struct device *dev, struct phy *phy)
-{
-}
-
-static inline struct phy_provider *__of_phy_provider_register(
- struct device *dev, struct module *owner, struct phy * (*of_xlate)(
- struct device *dev, struct of_phandle_args *args))
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline struct phy_provider *__devm_of_phy_provider_register(struct device
- *dev, struct module *owner, struct phy * (*of_xlate)(struct device *dev,
- struct of_phandle_args *args))
-{
- return ERR_PTR(-ENOSYS);
-}
-
-static inline void of_phy_provider_unregister(struct phy_provider *phy_provider)
-{
-}
-
-static inline void devm_of_phy_provider_unregister(struct device *dev,
- struct phy_provider *phy_provider)
-{
-}
-#endif
-
-static inline int phy_pm_runtime_get(struct phy *phy)
-{
- if (WARN(IS_ERR(phy), "Invalid PHY reference\n"))
- return -EINVAL;
-
- if (!pm_runtime_enabled(&phy->dev))
- return -ENOTSUPP;
-
- return pm_runtime_get(&phy->dev);
-}
-
-static inline int phy_pm_runtime_get_sync(struct phy *phy)
-{
- if (WARN(IS_ERR(phy), "Invalid PHY reference\n"))
- return -EINVAL;
-
- if (!pm_runtime_enabled(&phy->dev))
- return -ENOTSUPP;
-
- return pm_runtime_get_sync(&phy->dev);
-}
-
-static inline int phy_pm_runtime_put(struct phy *phy)
-{
- if (WARN(IS_ERR(phy), "Invalid PHY reference\n"))
- return -EINVAL;
-
- if (!pm_runtime_enabled(&phy->dev))
- return -ENOTSUPP;
-
- return pm_runtime_put(&phy->dev);
-}
-
-static inline int phy_pm_runtime_put_sync(struct phy *phy)
-{
- if (WARN(IS_ERR(phy), "Invalid PHY reference\n"))
- return -EINVAL;
-
- if (!pm_runtime_enabled(&phy->dev))
- return -ENOTSUPP;
-
- return pm_runtime_put_sync(&phy->dev);
-}
-
-static inline void phy_pm_runtime_allow(struct phy *phy)
-{
- if (WARN(IS_ERR(phy), "Invalid PHY reference\n"))
- return;
-
- if (!pm_runtime_enabled(&phy->dev))
- return;
-
- pm_runtime_allow(&phy->dev);
-}
-
-static inline void phy_pm_runtime_forbid(struct phy *phy)
-{
- if (WARN(IS_ERR(phy), "Invalid PHY reference\n"))
- return;
-
- if (!pm_runtime_enabled(&phy->dev))
- return;
-
- pm_runtime_forbid(&phy->dev);
-}
-
-static inline int phy_init(struct phy *phy)
-{
- int ret;
-
- ret = phy_pm_runtime_get_sync(phy);
- if (ret < 0 && ret != -ENOTSUPP)
- return ret;
-
- mutex_lock(&phy->mutex);
- if (phy->init_count++ == 0 && phy->ops->init) {
- ret = phy->ops->init(phy);
- if (ret < 0) {
- dev_err(&phy->dev, "phy init failed --> %d\n", ret);
- goto out;
- }
- }
-
-out:
- mutex_unlock(&phy->mutex);
- phy_pm_runtime_put(phy);
- return ret;
-}
-
-static inline int phy_exit(struct phy *phy)
-{
- int ret;
-
- ret = phy_pm_runtime_get_sync(phy);
- if (ret < 0 && ret != -ENOTSUPP)
- return ret;
-
- mutex_lock(&phy->mutex);
- if (--phy->init_count == 0 && phy->ops->exit) {
- ret = phy->ops->exit(phy);
- if (ret < 0) {
- dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
- goto out;
- }
- }
-
-out:
- mutex_unlock(&phy->mutex);
- phy_pm_runtime_put(phy);
- return ret;
-}
-
-static inline int phy_power_on(struct phy *phy)
-{
- int ret = -ENOTSUPP;
-
- ret = phy_pm_runtime_get_sync(phy);
- if (ret < 0 && ret != -ENOTSUPP)
- return ret;
-
- mutex_lock(&phy->mutex);
- if (phy->power_count++ == 0 && phy->ops->power_on) {
- ret = phy->ops->power_on(phy);
- if (ret < 0) {
- dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
- goto out;
- }
- }
-
-out:
- mutex_unlock(&phy->mutex);
-
- return ret;
-}
-
-static inline int phy_power_off(struct phy *phy)
-{
- int ret = -ENOTSUPP;
-
- mutex_lock(&phy->mutex);
- if (--phy->power_count == 0 && phy->ops->power_off) {
- ret = phy->ops->power_off(phy);
- if (ret < 0) {
- dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
- goto out;
- }
- }
-
-out:
- mutex_unlock(&phy->mutex);
- phy_pm_runtime_put(phy);
-
- return ret;
-}
-
-#endif /* __DRIVERS_PHY_H */
projects / platform / kernel / linux-3.10.git / commitdiff