LXR linux/include/acpi/pcc.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * PCC (Platform Communications Channel) methods
   4 */
   5
   6#ifndef _PCC_H
   7#define _PCC_H
   8
   9#include <linux/mailbox_controller.h>
  10#include <linux/mailbox_client.h>
  11
  12#define MAX_PCC_SUBSPACES       256
  13#ifdef CONFIG_PCC
  14extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
  15                                                  int subspace_id);
  16extern void pcc_mbox_free_channel(struct mbox_chan *chan);
  17#else
  18static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
  19                                                         int subspace_id)
  20{
  21        return ERR_PTR(-ENODEV);
  22}
  23static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
  24#endif
  25
  26#endif /* _PCC_H */
  27