root/include/linux/platform_data/cros_ec_chardev.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * ChromeOS EC device interface.
   4  *
   5  * Copyright (C) 2014 Google, Inc.
   6  */
   7 
   8 #ifndef _UAPI_LINUX_CROS_EC_DEV_H_
   9 #define _UAPI_LINUX_CROS_EC_DEV_H_
  10 
  11 #include <linux/bits.h>
  12 #include <linux/ioctl.h>
  13 #include <linux/types.h>
  14 
  15 #include <linux/platform_data/cros_ec_commands.h>
  16 
  17 #define CROS_EC_DEV_VERSION "1.0.0"
  18 
  19 /**
  20  * struct cros_ec_readmem - Struct used to read mapped memory.
  21  * @offset: Within EC_LPC_ADDR_MEMMAP region.
  22  * @bytes: Number of bytes to read. Zero means "read a string" (including '\0')
  23  *         At most only EC_MEMMAP_SIZE bytes can be read.
  24  * @buffer: Where to store the result. The ioctl returns the number of bytes
  25  *         read or negative on error.
  26  */
  27 struct cros_ec_readmem {
  28         uint32_t offset;
  29         uint32_t bytes;
  30         uint8_t buffer[EC_MEMMAP_SIZE];
  31 };
  32 
  33 #define CROS_EC_DEV_IOC       0xEC
  34 #define CROS_EC_DEV_IOCXCMD   _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
  35 #define CROS_EC_DEV_IOCRDMEM  _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
  36 #define CROS_EC_DEV_IOCEVENTMASK _IO(CROS_EC_DEV_IOC, 2)
  37 
  38 #endif /* _CROS_EC_DEV_H_ */