Quelle  platform_early.h   Sprache: C

/* SPDX--License-Identifier: GPL-2.0 */

#ifndef __PLATFORM_EARLY__
#define __PLATFORM_EARLY__

#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>

struct sh_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 sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
       char *buf);
extern void sh_early_platform_add_devices(struct platform_device **devs, int num);

static inline int is_sh_early_platform_device(struct platform_device *pdev)
{
 return !pdev->dev.driver;
}

extern void sh_early_platform_driver_register_all(char *class_str);
extern int sh_early_platform_driver_probe(char *class_str,
           int nr_probe, int user_only);

#define sh_early_platform_init(class_string, platdrv)  \
 sh_early_platform_init_buffer(class_string, platdrv, NULL, 0)

#ifndef MODULE
#define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
static __initdata struct sh_early_platform_driver early_driver = {  \
 .class_str = class_string,     \
 .buffer = buf,       \
 .bufsize = bufsiz,      \
 .pdrv = platdrv,      \
 .requested_id = EARLY_PLATFORM_ID_UNSET,   \
};         \
static int __init sh_early_platform_driver_setup_func(char *buffer) \
{         \
 return sh_early_platform_driver_register(&early_driver, buffer); \
}         \
early_param(class_string, sh_early_platform_driver_setup_func)
#else /* MODULE */
#define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
static inline char *sh_early_platform_driver_setup_func(void)  \
{         \
 return bufsiz ? buf : NULL;     \
}
#endif /* MODULE */

#endif /* __PLATFORM_EARLY__ */