/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace * * Copyright (C) 2014 Google, Inc. */ #ifndef _CROS_EC_DEV_H_ #define _CROS_EC_DEV_H_ #include <linux/ioctl.h> #include <linux/types.h> #include <linux/mfd/cros_ec.h> #define CROS_EC_DEV_VERSION "1.0.0" /** * struct cros_ec_readmem - Struct used to read mapped memory. * @offset: Within EC_LPC_ADDR_MEMMAP region. * @bytes: Number of bytes to read. Zero means "read a string" (including '\0') * At most only EC_MEMMAP_SIZE bytes can be read. * @buffer: Where to store the result. The ioctl returns the number of bytes * read or negative on error. */ struct cros_ec_readmem { uint32_t offset; uint32_t bytes; uint8_t buffer[EC_MEMMAP_SIZE]; }; #define CROS_EC_DEV_IOC 0xEC #define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command) #define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem) #endif /* _CROS_EC_DEV_H_ */