drivers/staging/greybus/bundle.h

   1 /*
   2  * Greybus bundles
   3  *
   4  * Copyright 2014 Google Inc.
   5  * Copyright 2014 Linaro Ltd.
   6  *
   7  * Released under the GPLv2 only.
   8  */
   9
  10 #ifndef __BUNDLE_H
  11 #define __BUNDLE_H
  12
  13 #include <linux/list.h>
  14
  15 #define BUNDLE_ID_NONE  U8_MAX
  16
  17 /* Greybus "public" definitions" */
  18 struct gb_bundle {
  19         struct device           dev;
  20         struct gb_interface     *intf;
  21
  22         u8                      id;
  23         u8                      class;
  24         u8                      class_major;
  25         u8                      class_minor;
  26
  27         size_t                  num_cports;
  28         struct greybus_descriptor_cport *cport_desc;
  29
  30         struct list_head        connections;
  31         u8                      *state;
  32
  33         struct list_head        links;  /* interface->bundles */
  34 };
  35 #define to_gb_bundle(d) container_of(d, struct gb_bundle, dev)
  36
  37 /* Greybus "private" definitions" */
  38 struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id,
  39                                    u8 class);
  40 int gb_bundle_add(struct gb_bundle *bundle);
  41 void gb_bundle_destroy(struct gb_bundle *bundle);
  42
  43 /* Bundle Runtime PM wrappers */
  44 #ifdef CONFIG_PM
  45 static inline int gb_pm_runtime_get_sync(struct gb_bundle *bundle)
  46 {
  47         int retval;
  48
  49         retval = pm_runtime_get_sync(&bundle->dev);
  50         if (retval < 0) {
  51                 dev_err(&bundle->dev,
  52                         "pm_runtime_get_sync failed: %d\n", retval);
  53                 pm_runtime_put_noidle(&bundle->dev);
  54                 return retval;
  55         }
  56
  57         return 0;
  58 }
  59
  60 static inline int gb_pm_runtime_put_autosuspend(struct gb_bundle *bundle)
  61 {
  62         int retval;
  63
  64         pm_runtime_mark_last_busy(&bundle->dev);
  65         retval = pm_runtime_put_autosuspend(&bundle->dev);
  66
  67         return retval;
  68 }
  69
  70 static inline void gb_pm_runtime_get_noresume(struct gb_bundle *bundle)
  71 {
  72         pm_runtime_get_noresume(&bundle->dev);
  73 }
  74
  75 static inline void gb_pm_runtime_put_noidle(struct gb_bundle *bundle)
  76 {
  77         pm_runtime_put_noidle(&bundle->dev);
  78 }
  79
  80 #else
  81 static inline int gb_pm_runtime_get_sync(struct gb_bundle *bundle)
  82 { return 0; }
  83 static inline int gb_pm_runtime_put_autosuspend(struct gb_bundle *bundle)
  84 { return 0; }
  85
  86 static inline void gb_pm_runtime_get_noresume(struct gb_bundle *bundle) {}
  87 static inline void gb_pm_runtime_put_noidle(struct gb_bundle *bundle) {}
  88 #endif
  89
  90 #endif /* __BUNDLE_H */