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powerpc/mpic: Search for open-pic device-tree node if NULL

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Almost all PowerPC platforms use a standard "open-pic" device node so
the mpic_alloc() function now accepts NULL for the device-node.  This
will cause it to perform a default search with of_find_matching_node().

Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Kyle Moffett
2011-12-02 06:28:02 +00:00
committed by Benjamin Herrenschmidt
parent e7a98675ca
commit 996983b75c
23 changed files with 58 additions and 244 deletions
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arch/powerpc/sysdev/mpic.c
+30 -4
View File
@@ -1143,8 +1143,24 @@ struct mpic * __init mpic_alloc(struct device_node *node,
const char *vers;
const u32 *psrc;
/* This code assumes that a non-NULL device node is passed in */
BUG_ON(!node);
/* Default MPIC search parameters */
static const struct of_device_id __initconst mpic_device_id[] = {
{ .type = "open-pic", },
{ .compatible = "open-pic", },
{},
};
/*
* If we were not passed a device-tree node, then perform the default
* search for standardized a standardized OpenPIC.
*/
if (node) {
node = of_node_get(node);
} else {
node = of_find_matching_node(NULL, mpic_device_id);
if (!node)
return NULL;
}
/* Pick the physical address from the device tree if unspecified */
if (!phys_addr) {
@@ -1154,14 +1170,14 @@ struct mpic * __init mpic_alloc(struct device_node *node,
} else {
struct resource r;
if (of_address_to_resource(node, 0, &r))
return NULL;
goto err_of_node_put;
phys_addr = r.start;
}
}
mpic = kzalloc(sizeof(struct mpic), GFP_KERNEL);
if (mpic == NULL)
return NULL;
goto err_of_node_put;
mpic->name = name;
mpic->paddr = phys_addr;
@@ -1325,6 +1341,11 @@ struct mpic * __init mpic_alloc(struct device_node *node,
isu_size ? isu_size : mpic->num_sources,
&mpic_host_ops,
flags & MPIC_LARGE_VECTORS ? 2048 : 256);
/*
* FIXME: The code leaks the MPIC object and mappings here; this
* is very unlikely to fail but it ought to be fixed anyways.
*/
if (mpic->irqhost == NULL)
return NULL;
@@ -1359,7 +1380,12 @@ struct mpic * __init mpic_alloc(struct device_node *node,
irq_set_default_host(mpic->irqhost);
}
of_node_put(node);
return mpic;
err_of_node_put:
of_node_put(node);
return NULL;
}
void __init mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,