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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 <[email protected]>

Signed-off-by: Marek Szyprowski <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
This commit is contained in:
Marek Szyprowski 2014-02-28 14:42:49 +01:00 • committed by Grant Likely
commit f618c4703a
3 changed files with 72 additions and 0 deletions
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29
drivers/of/of_reserved_mem.c
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@ -170,6 +170,33 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
return 0;
}
static const struct of_device_id __rmem_of_table_sentinel
__used __section(__reservedmem_of_table_end);
/**
* res_mem_init_node() - call region specific reserved memory init code
*/
static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
{
extern const struct of_device_id __reservedmem_of_table[];
const struct of_device_id *i;
for (i = __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) {
reservedmem_of_init_fn initfn = i->data;
const char *compat = i->compatible;
if (!of_flat_dt_is_compatible(rmem->fdt_node, compat))
continue;
if (initfn(rmem, rmem->fdt_node, rmem->name) == 0) {
pr_info("Reserved memory: initialized node %s, compatible id %s\n",
rmem->name, compat);
return 0;
}
}
return -ENOENT;
}
/**
* fdt_init_reserved_mem - allocate and init all saved reserved memory regions
*/
@ -184,5 +211,7 @@ void __init fdt_init_reserved_mem(void)
if (rmem->size == 0)
err = __reserved_mem_alloc_size(node, rmem->name,
&rmem->base, &rmem->size);
if (err == 0)
__reserved_mem_init_node(rmem);
}
}