Commit 47026c4f authored by Konrad Dybcio's avatar Konrad Dybcio Committed by Rob Herring (Arm)
Browse files

of: address: Allow to specify nonposted-mmio per-device 



Certain IP blocks may strictly require/expect a nE mapping to function
correctly, while others may be fine without it (which is preferred for
performance reasons).

Allow specifying nonposted-mmio on a per-device basis.

Signed-off-by: default avatarKonrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250319-topic-nonposted_mmio-v1-2-dfb886fbd15f@oss.qualcomm.com


Signed-off-by: default avatarRob Herring (Arm) <robh@kernel.org>
parent 7f623466

drivers/of/address.c

+4 −3
Original line number Diff line number Diff line
@@ -1032,10 +1032,11 @@ EXPORT_SYMBOL_GPL(of_dma_is_coherent); 
static bool of_mmio_is_nonposted(const struct device_node *np)

{

	struct device_node *parent __free(device_node) = of_get_parent(np);

	if (!parent)

		return false;



	return of_property_read_bool(parent, "nonposted-mmio");

	if (of_property_read_bool(np, "nonposted-mmio"))

		return true;



	return parent && of_property_read_bool(parent, "nonposted-mmio");

}



static int __of_address_to_resource(struct device_node *dev, int index, int bar_no,