813f90728e
The pmi driver got simplified by removing support for multiple devices. As there is no more than one pmi device per maschine, there is no need to specify the device for listening and sending messages. This way the caller (cbe_cpufreq) doesn't need to scan the device tree. When registering the handler on a board without a pmi interface, pmi.c will just return -ENODEV. The patch that fixed the breakage of cell_defconfig has been broken out of the earlier version of this patch. So this is the version that applies cleanly on top of it. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
#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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef __KERNEL__
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#include <asm/of_device.h>
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#define PMI_TYPE_FREQ_CHANGE 0x01
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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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