xref: /openbmc/linux/include/linux/scmi_protocol.h (revision b6f20ff8)

// SPDX-License-Identifier: GPL-2.0
/*
 * SCMI Message Protocol driver header
 *
 * Copyright (C) 2018 ARM Ltd.
 */
#include <linux/types.h>

#define SCMI_MAX_STR_SIZE	16

/**
 * struct scmi_revision_info - version information structure
 *
 * @major_ver: Major ABI version. Change here implies risk of backward
 *	compatibility break.
 * @minor_ver: Minor ABI version. Change here implies new feature addition,
 *	or compatible change in ABI.
 * @num_protocols: Number of protocols that are implemented, excluding the
 *	base protocol.
 * @num_agents: Number of agents in the system.
 * @impl_ver: A vendor-specific implementation version.
 * @vendor_id: A vendor identifier(Null terminated ASCII string)
 * @sub_vendor_id: A sub-vendor identifier(Null terminated ASCII string)
 */
struct scmi_revision_info {
	u16 major_ver;
	u16 minor_ver;
	u8 num_protocols;
	u8 num_agents;
	u32 impl_ver;
	char vendor_id[SCMI_MAX_STR_SIZE];
	char sub_vendor_id[SCMI_MAX_STR_SIZE];
};

/**
 * struct scmi_handle - Handle returned to ARM SCMI clients for usage.
 *
 * @dev: pointer to the SCMI device
 * @version: pointer to the structure containing SCMI version information
 */
struct scmi_handle {
	struct device *dev;
	struct scmi_revision_info *version;
};

enum scmi_std_protocol {
	SCMI_PROTOCOL_BASE = 0x10,
	SCMI_PROTOCOL_POWER = 0x11,
	SCMI_PROTOCOL_SYSTEM = 0x12,
	SCMI_PROTOCOL_PERF = 0x13,
	SCMI_PROTOCOL_CLOCK = 0x14,
	SCMI_PROTOCOL_SENSOR = 0x15,
};