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checks: check for #{size,address}-cells without child nodes 

Add a check for unnecessary "#{size,address}-cells" when there's neither
a 'ranges' property nor child nodes with a 'reg' property.

An exception may be an overlay that adds nodes, but this case would need
"#{size,address}-cells" in the overlay to properly compile already.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
main
Rob Herring 2017-12-12 16:46:27 -06:00 committed by David Gibson
parent 18a3d84bb8
commit d0c44ebe3f
1 changed files with 26 additions and 0 deletions
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26
checks.c
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@ -981,6 +981,31 @@ static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
&addr_size_cells);

static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
struct node *child;
bool has_reg = false;

if (!node->parent || node->addr_cells < 0 || node->size_cells < 0)
return;

if (get_property(node, "ranges") || !node->children)
return;

for_each_child(node, child) {
prop = get_property(child, "reg");
if (prop)
has_reg = true;
}

if (!has_reg)
FAIL(c, dti, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property in %s",
node->fullpath);
}
WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);

static void check_obsolete_chosen_interrupt_controller(struct check *c,
struct dt_info *dti,
struct node *node)
@ -1305,6 +1330,7 @@ static struct check *check_table[] = {
&simple_bus_reg,

&avoid_default_addr_size,
&avoid_unnecessary_addr_size,
&obsolete_chosen_interrupt_controller,

&clocks_property,