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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 */ |