arch/sh/include/asm/platform_early.h

   1 /* SPDX--License-Identifier: GPL-2.0 */
   2
   3 #ifndef __PLATFORM_EARLY__
   4 #define __PLATFORM_EARLY__
   5
   6 #include <linux/types.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/pm_runtime.h>
   9 #include <linux/slab.h>
  10
  11 struct sh_early_platform_driver {
  12         const char *class_str;
  13         struct platform_driver *pdrv;
  14         struct list_head list;
  15         int requested_id;
  16         char *buffer;
  17         int bufsize;
  18 };
  19
  20 #define EARLY_PLATFORM_ID_UNSET -2
  21 #define EARLY_PLATFORM_ID_ERROR -3
  22
  23 extern int sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
  24                                           char *buf);
  25 extern void sh_early_platform_add_devices(struct platform_device **devs, int num);
  26
  27 static inline int is_sh_early_platform_device(struct platform_device *pdev)
  28 {
  29         return !pdev->dev.driver;
  30 }
  31
  32 extern void sh_early_platform_driver_register_all(char *class_str);
  33 extern int sh_early_platform_driver_probe(char *class_str,
  34                                        int nr_probe, int user_only);
  35
  36 #define sh_early_platform_init(class_string, platdrv)           \
  37         sh_early_platform_init_buffer(class_string, platdrv, NULL, 0)
  38
  39 #ifndef MODULE
  40 #define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz)       \
  41 static __initdata struct sh_early_platform_driver early_driver = {              \
  42         .class_str = class_string,                                      \
  43         .buffer = buf,                                                  \
  44         .bufsize = bufsiz,                                              \
  45         .pdrv = platdrv,                                                \
  46         .requested_id = EARLY_PLATFORM_ID_UNSET,                        \
  47 };                                                                      \
  48 static int __init sh_early_platform_driver_setup_func(char *buffer)     \
  49 {                                                                       \
  50         return sh_early_platform_driver_register(&early_driver, buffer);        \
  51 }                                                                       \
  52 early_param(class_string, sh_early_platform_driver_setup_func)
  53 #else /* MODULE */
  54 #define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz)       \
  55 static inline char *sh_early_platform_driver_setup_func(void)           \
  56 {                                                                       \
  57         return bufsiz ? buf : NULL;                                     \
  58 }
  59 #endif /* MODULE */
  60
  61 #endif /* __PLATFORM_EARLY__ */