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