drivers/staging/greybus/gbphy.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Greybus Bridged-Phy Bus driver
   4  *
   5  * Copyright 2016 Google Inc.
   6  */
   7
   8 #ifndef __GBPHY_H
   9 #define __GBPHY_H
  10
  11 struct gbphy_device {
  12         u32 id;
  13         struct greybus_descriptor_cport *cport_desc;
  14         struct gb_bundle *bundle;
  15         struct list_head list;
  16         struct device dev;
  17 };
  18 #define to_gbphy_dev(d) container_of(d, struct gbphy_device, dev)
  19
  20 static inline void *gb_gbphy_get_data(struct gbphy_device *gdev)
  21 {
  22         return dev_get_drvdata(&gdev->dev);
  23 }
  24
  25 static inline void gb_gbphy_set_data(struct gbphy_device *gdev, void *data)
  26 {
  27         dev_set_drvdata(&gdev->dev, data);
  28 }
  29
  30 struct gbphy_device_id {
  31         __u8 protocol_id;
  32 };
  33
  34 #define GBPHY_PROTOCOL(p)               \
  35         .protocol_id    = (p),
  36
  37 struct gbphy_driver {
  38         const char *name;
  39         int (*probe)(struct gbphy_device *,
  40                      const struct gbphy_device_id *id);
  41         void (*remove)(struct gbphy_device *);
  42         const struct gbphy_device_id *id_table;
  43
  44         struct device_driver driver;
  45 };
  46 #define to_gbphy_driver(d) container_of(d, struct gbphy_driver, driver)
  47
  48 int gb_gbphy_register_driver(struct gbphy_driver *driver,
  49                              struct module *owner, const char *mod_name);
  50 void gb_gbphy_deregister_driver(struct gbphy_driver *driver);
  51
  52 #define gb_gbphy_register(driver) \
  53         gb_gbphy_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
  54 #define gb_gbphy_deregister(driver) \
  55         gb_gbphy_deregister_driver(driver)
  56
  57 /**
  58  * module_gbphy_driver() - Helper macro for registering a gbphy driver
  59  * @__gbphy_driver: gbphy_driver structure
  60  *
  61  * Helper macro for gbphy drivers to set up proper module init / exit
  62  * functions.  Replaces module_init() and module_exit() and keeps people from
  63  * printing pointless things to the kernel log when their driver is loaded.
  64  */
  65 #define module_gbphy_driver(__gbphy_driver)     \
  66         module_driver(__gbphy_driver, gb_gbphy_register, gb_gbphy_deregister)
  67
  68 #ifdef CONFIG_PM
  69 static inline int gbphy_runtime_get_sync(struct gbphy_device *gbphy_dev)
  70 {
  71         struct device *dev = &gbphy_dev->dev;
  72         int ret;
  73
  74         ret = pm_runtime_get_sync(dev);
  75         if (ret < 0) {
  76                 dev_err(dev, "pm_runtime_get_sync failed: %d\n", ret);
  77                 pm_runtime_put_noidle(dev);
  78                 return ret;
  79         }
  80
  81         return 0;
  82 }
  83
  84 static inline void gbphy_runtime_put_autosuspend(struct gbphy_device *gbphy_dev)
  85 {
  86         struct device *dev = &gbphy_dev->dev;
  87
  88         pm_runtime_mark_last_busy(dev);
  89         pm_runtime_put_autosuspend(dev);
  90 }
  91
  92 static inline void gbphy_runtime_get_noresume(struct gbphy_device *gbphy_dev)
  93 {
  94         pm_runtime_get_noresume(&gbphy_dev->dev);
  95 }
  96
  97 static inline void gbphy_runtime_put_noidle(struct gbphy_device *gbphy_dev)
  98 {
  99         pm_runtime_put_noidle(&gbphy_dev->dev);
 100 }
 101 #else
 102 static inline int gbphy_runtime_get_sync(struct gbphy_device *gbphy_dev) { return 0; }
 103 static inline void gbphy_runtime_put_autosuspend(struct gbphy_device *gbphy_dev) {}
 104 static inline void gbphy_runtime_get_noresume(struct gbphy_device *gbphy_dev) {}
 105 static inline void gbphy_runtime_put_noidle(struct gbphy_device *gbphy_dev) {}
 106 #endif
 107
 108 #endif /* __GBPHY_H */
 109