forked from Minki/linux
4726b7b5e5
This adds an update notifier mechanism for changes to properties in the device tree. One use of this would be a device driver that needs to act on changes to it's properties in the device tree after a live migration or a dynamic activation that is triggered by updates to ofdt properties. Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
#ifndef _PPC64_PSERIES_RECONFIG_H
|
|
#define _PPC64_PSERIES_RECONFIG_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/notifier.h>
|
|
|
|
/*
|
|
* Use this API if your code needs to know about OF device nodes being
|
|
* added or removed on pSeries systems.
|
|
*/
|
|
|
|
#define PSERIES_RECONFIG_ADD 0x0001
|
|
#define PSERIES_RECONFIG_REMOVE 0x0002
|
|
#define PSERIES_DRCONF_MEM_ADD 0x0003
|
|
#define PSERIES_DRCONF_MEM_REMOVE 0x0004
|
|
#define PSERIES_UPDATE_PROPERTY 0x0005
|
|
|
|
/**
|
|
* pSeries_reconfig_notify - Notifier value structure for OFDT property updates
|
|
*
|
|
* @node: Device tree node which owns the property being updated
|
|
* @property: Updated property
|
|
*/
|
|
struct pSeries_reconfig_prop_update {
|
|
struct device_node *node;
|
|
struct property *property;
|
|
};
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
extern int pSeries_reconfig_notifier_register(struct notifier_block *);
|
|
extern void pSeries_reconfig_notifier_unregister(struct notifier_block *);
|
|
extern int pSeries_reconfig_notify(unsigned long action, void *p);
|
|
/* Not the best place to put this, will be fixed when we move some
|
|
* of the rtas suspend-me stuff to pseries */
|
|
extern void pSeries_coalesce_init(void);
|
|
#else /* !CONFIG_PPC_PSERIES */
|
|
static inline int pSeries_reconfig_notifier_register(struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void pSeries_reconfig_notifier_unregister(struct notifier_block *nb) { }
|
|
static inline void pSeries_coalesce_init(void) { }
|
|
#endif /* CONFIG_PPC_PSERIES */
|
|
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _PPC64_PSERIES_RECONFIG_H */
|