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powerpc+of: Add of node/property notification chain for adds and removes

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This patch moves the notification chain for updates to the device tree
from the powerpc/pseries code to the base OF code. This makes this
functionality available to all architectures.

Additionally the notification chain is updated to allow notifications
for property add/remove/update. To make this work a pointer to a new
struct (of_prop_reconfig) is passed to the routines in the notification chain.
The of_prop_reconfig property contains a pointer to the node containing the
property and a pointer to the property itself. In the case of property
updates, the property pointer refers to the new property.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Nathan Fontenot
2012-10-02 16:57:57 +00:00
committed by Benjamin Herrenschmidt
parent f594972083
commit 1cf3d8b3d2
12 changed files with 163 additions and 154 deletions
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32
arch/powerpc/include/asm/pSeries_reconfig.h
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@@ -2,43 +2,11 @@
#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 */