include/acpi/pcc.h

   1 /*
   2  * PCC (Platform Communications Channel) methods
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; version 2
   7  * of the License.
   8  */
   9
  10 #ifndef _PCC_H
  11 #define _PCC_H
  12
  13 #include <linux/mailbox_controller.h>
  14 #include <linux/mailbox_client.h>
  15
  16 #define MAX_PCC_SUBSPACES       256
  17 #ifdef CONFIG_PCC
  18 extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
  19                                                   int subspace_id);
  20 extern void pcc_mbox_free_channel(struct mbox_chan *chan);
  21 #else
  22 static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
  23                                                          int subspace_id)
  24 {
  25         return ERR_PTR(-ENODEV);
  26 }
  27 static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
  28 #endif
  29
  30 #endif /* _PCC_H */