2481d76615
On some platforms, the I2C controller is shared between the OS and OBP. OBP uses this I2C controller to access the EEPROM, and thus is programmed when the kernel calls prom_setprop(). Wrap such calls with the new of_set_property_mutex. Relevant I2C bus drivers can grab this mutex around top-level I2C operations to provide the proper protection. Signed-off-by: David S. Miller <davem@davemloft.net>
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
#ifndef _SPARC_PROM_H
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#define _SPARC_PROM_H
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#ifdef __KERNEL__
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/*
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* Definitions for talking to the Open Firmware PROM on
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* Power Macintosh computers.
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*
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
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* Updates for SPARC by David S. Miller
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/mutex.h>
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#include <asm/atomic.h>
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#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 2
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#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
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#define of_compat_cmp(s1, s2, l) strncmp((s1), (s2), (l))
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#define of_prop_cmp(s1, s2) strcasecmp((s1), (s2))
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#define of_node_cmp(s1, s2) strcmp((s1), (s2))
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typedef u32 phandle;
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typedef u32 ihandle;
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struct property {
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char *name;
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int length;
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void *value;
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struct property *next;
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unsigned long _flags;
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unsigned int unique_id;
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};
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struct of_irq_controller;
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struct device_node {
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const char *name;
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const char *type;
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phandle node;
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char *path_component_name;
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char *full_name;
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struct property *properties;
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struct property *deadprops; /* removed properties */
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struct device_node *parent;
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struct device_node *child;
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struct device_node *sibling;
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struct device_node *next; /* next device of same type */
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struct device_node *allnext; /* next in list of all nodes */
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struct proc_dir_entry *pde; /* this node's proc directory */
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struct kref kref;
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unsigned long _flags;
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void *data;
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unsigned int unique_id;
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struct of_irq_controller *irq_trans;
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};
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struct of_irq_controller {
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unsigned int (*irq_build)(struct device_node *, unsigned int, void *);
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void *data;
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};
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#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
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#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
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extern struct device_node *of_find_node_by_cpuid(int cpuid);
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extern int of_set_property(struct device_node *node, const char *name, void *val, int len);
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extern struct mutex of_set_property_mutex;
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extern int of_getintprop_default(struct device_node *np,
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const char *name,
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int def);
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extern int of_find_in_proplist(const char *list, const char *match, int len);
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#ifdef CONFIG_NUMA
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extern int of_node_to_nid(struct device_node *dp);
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#else
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#define of_node_to_nid(dp) (-1)
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#endif
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extern void prom_build_devicetree(void);
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/* Dummy ref counting routines - to be implemented later */
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static inline struct device_node *of_node_get(struct device_node *node)
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{
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return node;
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}
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static inline void of_node_put(struct device_node *node)
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{
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}
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/*
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* NB: This is here while we transition from using asm/prom.h
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* to linux/of.h
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*/
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#include <linux/of.h>
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extern struct device_node *of_console_device;
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extern char *of_console_path;
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extern char *of_console_options;
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#endif /* __KERNEL__ */
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#endif /* _SPARC_PROM_H */
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