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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _POWERPC_PMI_H
#define _POWERPC_PMI_H
/*
* Definitions for talking with PMI device on PowerPC
*
* PMI (Platform Management Interrupt) is a way to communicate
* with the BMC (Baseboard Management Controller) via interrupts.
* Unlike IPMI it is bidirectional and has a low latency.
*
* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
*
* Author: Christian Krafft <krafft@de.ibm.com>
*/
#ifdef __KERNEL__
#define PMI_TYPE_FREQ_CHANGE 0x01
#define PMI_TYPE_POWER_BUTTON 0x02
#define PMI_READ_TYPE 0
#define PMI_READ_DATA0 1
#define PMI_READ_DATA1 2
#define PMI_READ_DATA2 3
#define PMI_WRITE_TYPE 4
#define PMI_WRITE_DATA0 5
#define PMI_WRITE_DATA1 6
#define PMI_WRITE_DATA2 7
#define PMI_ACK 0x80
#define PMI_TIMEOUT 100
typedef struct {
u8 type;
u8 data0;
u8 data1;
u8 data2;
} pmi_message_t;
struct pmi_handler {
struct list_head node;
u8 type;
void (*handle_pmi_message) (pmi_message_t);
};
int pmi_register_handler(struct pmi_handler *);
void pmi_unregister_handler(struct pmi_handler *);
int pmi_send_message(pmi_message_t);
#endif /* __KERNEL__ */
#endif /* _POWERPC_PMI_H */