LXR linux/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
  18extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
  19                                                  int subspace_id);
  20extern void pcc_mbox_free_channel(struct mbox_chan *chan);
  21#else
  22static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
  23                                                         int subspace_id)
  24{
  25        return ERR_PTR(-ENODEV);
  26}
  27static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
  28#endif
  29
  30#endif /* _PCC_H */
  31