[RFC,01/13] dt-bindings: Introduce 64bit-mmio-broken
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Message ID 20210226140305.26356-2-nsaenzjulienne@suse.de
State New, archived
Headers show
Series
  • Generic way of dealing with broken 64-bit buses
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Commit Message

Nicolas Saenz Julienne Feb. 26, 2021, 2:02 p.m. UTC
Some buses might not be able to handle 64-bit sized MMIO accesses, on
otherwise 64-bit systems. Introduce a boolean property to cater for this
limitation.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 .../devicetree/bindings/common-properties.txt     | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Patch
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diff --git a/Documentation/devicetree/bindings/common-properties.txt b/Documentation/devicetree/bindings/common-properties.txt
index 98a28130e100..3783510102c3 100644
--- a/Documentation/devicetree/bindings/common-properties.txt
+++ b/Documentation/devicetree/bindings/common-properties.txt
@@ -83,3 +83,18 @@  gpio@0 {
 	      #gpio-cells = <2>;
 	      #daisy-chained-devices = <3>;
 };
+
+Broken 64-bit buses
+-------------------
+
+Some buses might not be able to handle 64-bit sized MMIO accesses, on otherwise
+64-bit systems. This property is only relevant to MMIO bus nodes.
+
+Optional properties:
+ - 64bit-mmio-broken: Boolean
+
+Example:
+pcie@0 {
+	compatible = "name";
+	64bit-mmio-broken;
+};