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drivers: of: add support for custom reserved memory drivers

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Add support for custom reserved memory drivers. Call their init() function
for each reserved region and prepare for using operations provided by them
with by the reserved_mem->ops array.

Based on previous code provided by Josh Cartwright <joshc@codeaurora.org>

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Marek Szyprowski 2014-02-28 14:42:49 +01:00 • committed by Grant Likely
parent 3f0c820664
commit f618c4703a
3 changed files with 72 additions and 0 deletions
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32
include/linux/of_reserved_mem.h
View file

@ -1,21 +1,53 @@
#ifndef __OF_RESERVED_MEM_H
#define __OF_RESERVED_MEM_H
struct device;
struct of_phandle_args;
struct reserved_mem_ops;
struct reserved_mem {
const char *name;
unsigned long fdt_node;
const struct reserved_mem_ops *ops;
phys_addr_t base;
phys_addr_t size;
void *priv;
};
struct reserved_mem_ops {
void (*device_init)(struct reserved_mem *rmem,
struct device *dev);
void (*device_release)(struct reserved_mem *rmem,
struct device *dev);
};
typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem,
unsigned long node, const char *uname);
#ifdef CONFIG_OF_RESERVED_MEM
void fdt_init_reserved_mem(void);
void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
phys_addr_t base, phys_addr_t size);
#define RESERVEDMEM_OF_DECLARE(name, compat, init) \
static const struct of_device_id __reservedmem_of_table_##name \
__used __section(__reservedmem_of_table) \
= { .compatible = compat, \
.data = (init == (reservedmem_of_init_fn)NULL) ? \
init : init }
#else
static inline void fdt_init_reserved_mem(void) { }
static inline void fdt_reserved_mem_save_node(unsigned long node,
const char *uname, phys_addr_t base, phys_addr_t size) { }
#define RESERVEDMEM_OF_DECLARE(name, compat, init) \
static const struct of_device_id __reservedmem_of_table_##name \
__attribute__((unused)) \
= { .compatible = compat, \
.data = (init == (reservedmem_of_init_fn)NULL) ? \
init : init }
#endif
#endif /* __OF_RESERVED_MEM_H */