| /* 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 */ |
