diff options
| author |   Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> | 2025-03-19 15:25:58 +0100 |
|---|---|---|
| committer |   Rob Herring (Arm) <robh@kernel.org> | 2025-03-21 11:27:56 -0500 |
| commit | 47026c4ffedd2cd664e3f70f63c4149c56355f37 (patch) | |
| tree | 5f8ece8303ece22b1d5cce4ed5ddd87d7d047db8 | |
| parent | of: address: Expand nonposted-mmio to non-Apple Silicon platforms (diff) | |
| download | wireguard-linux-47026c4ffedd2cd664e3f70f63c4149c56355f37.tar.xz wireguard-linux-47026c4ffedd2cd664e3f70f63c4149c56355f37.zip | |
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: Konrad 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: Rob Herring (Arm) <robh@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/of/address.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 0ed35a4f9205..cb2212b13375 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -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, |