mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 21:20:51 +07:00
dbe2256ddd
Some modules register several sub-drivers. Provide a helper that makes it easy to register and unregister a list of sub-drivers, as well as unwind properly on error. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
366 lines
12 KiB
C
366 lines
12 KiB
C
/*
|
|
* platform_device.h - generic, centralized driver model
|
|
*
|
|
* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
|
|
*
|
|
* This file is released under the GPLv2
|
|
*
|
|
* See Documentation/driver-model/ for more information.
|
|
*/
|
|
|
|
#ifndef _PLATFORM_DEVICE_H_
|
|
#define _PLATFORM_DEVICE_H_
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/mod_devicetable.h>
|
|
|
|
#define PLATFORM_DEVID_NONE (-1)
|
|
#define PLATFORM_DEVID_AUTO (-2)
|
|
|
|
struct mfd_cell;
|
|
|
|
struct platform_device {
|
|
const char *name;
|
|
int id;
|
|
bool id_auto;
|
|
struct device dev;
|
|
u32 num_resources;
|
|
struct resource *resource;
|
|
|
|
const struct platform_device_id *id_entry;
|
|
char *driver_override; /* Driver name to force a match */
|
|
|
|
/* MFD cell pointer */
|
|
struct mfd_cell *mfd_cell;
|
|
|
|
/* arch specific additions */
|
|
struct pdev_archdata archdata;
|
|
};
|
|
|
|
#define platform_get_device_id(pdev) ((pdev)->id_entry)
|
|
|
|
#define to_platform_device(x) container_of((x), struct platform_device, dev)
|
|
|
|
extern int platform_device_register(struct platform_device *);
|
|
extern void platform_device_unregister(struct platform_device *);
|
|
|
|
extern struct bus_type platform_bus_type;
|
|
extern struct device platform_bus;
|
|
|
|
extern void arch_setup_pdev_archdata(struct platform_device *);
|
|
extern struct resource *platform_get_resource(struct platform_device *,
|
|
unsigned int, unsigned int);
|
|
extern int platform_get_irq(struct platform_device *, unsigned int);
|
|
extern struct resource *platform_get_resource_byname(struct platform_device *,
|
|
unsigned int,
|
|
const char *);
|
|
extern int platform_get_irq_byname(struct platform_device *, const char *);
|
|
extern int platform_add_devices(struct platform_device **, int);
|
|
|
|
struct platform_device_info {
|
|
struct device *parent;
|
|
struct fwnode_handle *fwnode;
|
|
|
|
const char *name;
|
|
int id;
|
|
|
|
const struct resource *res;
|
|
unsigned int num_res;
|
|
|
|
const void *data;
|
|
size_t size_data;
|
|
u64 dma_mask;
|
|
};
|
|
extern struct platform_device *platform_device_register_full(
|
|
const struct platform_device_info *pdevinfo);
|
|
|
|
/**
|
|
* platform_device_register_resndata - add a platform-level device with
|
|
* resources and platform-specific data
|
|
*
|
|
* @parent: parent device for the device we're adding
|
|
* @name: base name of the device we're adding
|
|
* @id: instance id
|
|
* @res: set of resources that needs to be allocated for the device
|
|
* @num: number of resources
|
|
* @data: platform specific data for this platform device
|
|
* @size: size of platform specific data
|
|
*
|
|
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
|
|
*/
|
|
static inline struct platform_device *platform_device_register_resndata(
|
|
struct device *parent, const char *name, int id,
|
|
const struct resource *res, unsigned int num,
|
|
const void *data, size_t size) {
|
|
|
|
struct platform_device_info pdevinfo = {
|
|
.parent = parent,
|
|
.name = name,
|
|
.id = id,
|
|
.res = res,
|
|
.num_res = num,
|
|
.data = data,
|
|
.size_data = size,
|
|
.dma_mask = 0,
|
|
};
|
|
|
|
return platform_device_register_full(&pdevinfo);
|
|
}
|
|
|
|
/**
|
|
* platform_device_register_simple - add a platform-level device and its resources
|
|
* @name: base name of the device we're adding
|
|
* @id: instance id
|
|
* @res: set of resources that needs to be allocated for the device
|
|
* @num: number of resources
|
|
*
|
|
* This function creates a simple platform device that requires minimal
|
|
* resource and memory management. Canned release function freeing memory
|
|
* allocated for the device allows drivers using such devices to be
|
|
* unloaded without waiting for the last reference to the device to be
|
|
* dropped.
|
|
*
|
|
* This interface is primarily intended for use with legacy drivers which
|
|
* probe hardware directly. Because such drivers create sysfs device nodes
|
|
* themselves, rather than letting system infrastructure handle such device
|
|
* enumeration tasks, they don't fully conform to the Linux driver model.
|
|
* In particular, when such drivers are built as modules, they can't be
|
|
* "hotplugged".
|
|
*
|
|
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
|
|
*/
|
|
static inline struct platform_device *platform_device_register_simple(
|
|
const char *name, int id,
|
|
const struct resource *res, unsigned int num)
|
|
{
|
|
return platform_device_register_resndata(NULL, name, id,
|
|
res, num, NULL, 0);
|
|
}
|
|
|
|
/**
|
|
* platform_device_register_data - add a platform-level device with platform-specific data
|
|
* @parent: parent device for the device we're adding
|
|
* @name: base name of the device we're adding
|
|
* @id: instance id
|
|
* @data: platform specific data for this platform device
|
|
* @size: size of platform specific data
|
|
*
|
|
* This function creates a simple platform device that requires minimal
|
|
* resource and memory management. Canned release function freeing memory
|
|
* allocated for the device allows drivers using such devices to be
|
|
* unloaded without waiting for the last reference to the device to be
|
|
* dropped.
|
|
*
|
|
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
|
|
*/
|
|
static inline struct platform_device *platform_device_register_data(
|
|
struct device *parent, const char *name, int id,
|
|
const void *data, size_t size)
|
|
{
|
|
return platform_device_register_resndata(parent, name, id,
|
|
NULL, 0, data, size);
|
|
}
|
|
|
|
extern struct platform_device *platform_device_alloc(const char *name, int id);
|
|
extern int platform_device_add_resources(struct platform_device *pdev,
|
|
const struct resource *res,
|
|
unsigned int num);
|
|
extern int platform_device_add_data(struct platform_device *pdev,
|
|
const void *data, size_t size);
|
|
extern int platform_device_add(struct platform_device *pdev);
|
|
extern void platform_device_del(struct platform_device *pdev);
|
|
extern void platform_device_put(struct platform_device *pdev);
|
|
|
|
struct platform_driver {
|
|
int (*probe)(struct platform_device *);
|
|
int (*remove)(struct platform_device *);
|
|
void (*shutdown)(struct platform_device *);
|
|
int (*suspend)(struct platform_device *, pm_message_t state);
|
|
int (*resume)(struct platform_device *);
|
|
struct device_driver driver;
|
|
const struct platform_device_id *id_table;
|
|
bool prevent_deferred_probe;
|
|
};
|
|
|
|
#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
|
|
driver))
|
|
|
|
/*
|
|
* use a macro to avoid include chaining to get THIS_MODULE
|
|
*/
|
|
#define platform_driver_register(drv) \
|
|
__platform_driver_register(drv, THIS_MODULE)
|
|
extern int __platform_driver_register(struct platform_driver *,
|
|
struct module *);
|
|
extern void platform_driver_unregister(struct platform_driver *);
|
|
|
|
/* non-hotpluggable platform devices may use this so that probe() and
|
|
* its support may live in __init sections, conserving runtime memory.
|
|
*/
|
|
#define platform_driver_probe(drv, probe) \
|
|
__platform_driver_probe(drv, probe, THIS_MODULE)
|
|
extern int __platform_driver_probe(struct platform_driver *driver,
|
|
int (*probe)(struct platform_device *), struct module *module);
|
|
|
|
static inline void *platform_get_drvdata(const struct platform_device *pdev)
|
|
{
|
|
return dev_get_drvdata(&pdev->dev);
|
|
}
|
|
|
|
static inline void platform_set_drvdata(struct platform_device *pdev,
|
|
void *data)
|
|
{
|
|
dev_set_drvdata(&pdev->dev, data);
|
|
}
|
|
|
|
/* module_platform_driver() - Helper macro for drivers that don't do
|
|
* anything special in module init/exit. This eliminates a lot of
|
|
* boilerplate. Each module may only use this macro once, and
|
|
* calling it replaces module_init() and module_exit()
|
|
*/
|
|
#define module_platform_driver(__platform_driver) \
|
|
module_driver(__platform_driver, platform_driver_register, \
|
|
platform_driver_unregister)
|
|
|
|
/* builtin_platform_driver() - Helper macro for builtin drivers that
|
|
* don't do anything special in driver init. This eliminates some
|
|
* boilerplate. Each driver may only use this macro once, and
|
|
* calling it replaces device_initcall(). Note this is meant to be
|
|
* a parallel of module_platform_driver() above, but w/o _exit stuff.
|
|
*/
|
|
#define builtin_platform_driver(__platform_driver) \
|
|
builtin_driver(__platform_driver, platform_driver_register)
|
|
|
|
/* module_platform_driver_probe() - Helper macro for drivers that don't do
|
|
* anything special in module init/exit. This eliminates a lot of
|
|
* boilerplate. Each module may only use this macro once, and
|
|
* calling it replaces module_init() and module_exit()
|
|
*/
|
|
#define module_platform_driver_probe(__platform_driver, __platform_probe) \
|
|
static int __init __platform_driver##_init(void) \
|
|
{ \
|
|
return platform_driver_probe(&(__platform_driver), \
|
|
__platform_probe); \
|
|
} \
|
|
module_init(__platform_driver##_init); \
|
|
static void __exit __platform_driver##_exit(void) \
|
|
{ \
|
|
platform_driver_unregister(&(__platform_driver)); \
|
|
} \
|
|
module_exit(__platform_driver##_exit);
|
|
|
|
/* builtin_platform_driver_probe() - Helper macro for drivers that don't do
|
|
* anything special in device init. This eliminates some boilerplate. Each
|
|
* driver may only use this macro once, and using it replaces device_initcall.
|
|
* This is meant to be a parallel of module_platform_driver_probe above, but
|
|
* without the __exit parts.
|
|
*/
|
|
#define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
|
|
static int __init __platform_driver##_init(void) \
|
|
{ \
|
|
return platform_driver_probe(&(__platform_driver), \
|
|
__platform_probe); \
|
|
} \
|
|
device_initcall(__platform_driver##_init); \
|
|
|
|
#define platform_create_bundle(driver, probe, res, n_res, data, size) \
|
|
__platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
|
|
extern struct platform_device *__platform_create_bundle(
|
|
struct platform_driver *driver, int (*probe)(struct platform_device *),
|
|
struct resource *res, unsigned int n_res,
|
|
const void *data, size_t size, struct module *module);
|
|
|
|
int __platform_register_drivers(struct platform_driver * const *drivers,
|
|
unsigned int count, struct module *owner);
|
|
void platform_unregister_drivers(struct platform_driver * const *drivers,
|
|
unsigned int count);
|
|
|
|
#define platform_register_drivers(drivers, count) \
|
|
__platform_register_drivers(drivers, count, THIS_MODULE)
|
|
|
|
/* early platform driver interface */
|
|
struct early_platform_driver {
|
|
const char *class_str;
|
|
struct platform_driver *pdrv;
|
|
struct list_head list;
|
|
int requested_id;
|
|
char *buffer;
|
|
int bufsize;
|
|
};
|
|
|
|
#define EARLY_PLATFORM_ID_UNSET -2
|
|
#define EARLY_PLATFORM_ID_ERROR -3
|
|
|
|
extern int early_platform_driver_register(struct early_platform_driver *epdrv,
|
|
char *buf);
|
|
extern void early_platform_add_devices(struct platform_device **devs, int num);
|
|
|
|
static inline int is_early_platform_device(struct platform_device *pdev)
|
|
{
|
|
return !pdev->dev.driver;
|
|
}
|
|
|
|
extern void early_platform_driver_register_all(char *class_str);
|
|
extern int early_platform_driver_probe(char *class_str,
|
|
int nr_probe, int user_only);
|
|
extern void early_platform_cleanup(void);
|
|
|
|
#define early_platform_init(class_string, platdrv) \
|
|
early_platform_init_buffer(class_string, platdrv, NULL, 0)
|
|
|
|
#ifndef MODULE
|
|
#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
|
|
static __initdata struct early_platform_driver early_driver = { \
|
|
.class_str = class_string, \
|
|
.buffer = buf, \
|
|
.bufsize = bufsiz, \
|
|
.pdrv = platdrv, \
|
|
.requested_id = EARLY_PLATFORM_ID_UNSET, \
|
|
}; \
|
|
static int __init early_platform_driver_setup_func(char *buffer) \
|
|
{ \
|
|
return early_platform_driver_register(&early_driver, buffer); \
|
|
} \
|
|
early_param(class_string, early_platform_driver_setup_func)
|
|
#else /* MODULE */
|
|
#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
|
|
static inline char *early_platform_driver_setup_func(void) \
|
|
{ \
|
|
return bufsiz ? buf : NULL; \
|
|
}
|
|
#endif /* MODULE */
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
extern int platform_pm_suspend(struct device *dev);
|
|
extern int platform_pm_resume(struct device *dev);
|
|
#else
|
|
#define platform_pm_suspend NULL
|
|
#define platform_pm_resume NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_HIBERNATE_CALLBACKS
|
|
extern int platform_pm_freeze(struct device *dev);
|
|
extern int platform_pm_thaw(struct device *dev);
|
|
extern int platform_pm_poweroff(struct device *dev);
|
|
extern int platform_pm_restore(struct device *dev);
|
|
#else
|
|
#define platform_pm_freeze NULL
|
|
#define platform_pm_thaw NULL
|
|
#define platform_pm_poweroff NULL
|
|
#define platform_pm_restore NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
#define USE_PLATFORM_PM_SLEEP_OPS \
|
|
.suspend = platform_pm_suspend, \
|
|
.resume = platform_pm_resume, \
|
|
.freeze = platform_pm_freeze, \
|
|
.thaw = platform_pm_thaw, \
|
|
.poweroff = platform_pm_poweroff, \
|
|
.restore = platform_pm_restore,
|
|
#else
|
|
#define USE_PLATFORM_PM_SLEEP_OPS
|
|
#endif
|
|
|
|
#endif /* _PLATFORM_DEVICE_H_ */
|