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bda2127827
Getting address and size cells for dma-ranges/ranges parsing is tricky and shouldn't rely on the node's count_cells() method. The function starts looking for cells on the parent node, as its supposed to work with device nodes, which doesn't work when input with bus nodes, as generally done when parsing ranges. Add test to catch regressions on that specific quirk as developers will be tempted to edit it out in favor of the default method. Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/9200970a917a9cabdc5b17483b5a8725111eb9d0.camel@suse.de Signed-off-by: Rob Herring <robh@kernel.org>
48 lines
1 KiB
Text
48 lines
1 KiB
Text
// SPDX-License-Identifier: GPL-2.0
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/ {
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#address-cells = <1>;
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#size-cells = <1>;
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testcase-data {
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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address-tests {
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#address-cells = <1>;
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#size-cells = <1>;
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/* ranges here is to make sure we don't use it for
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* dma-ranges translation */
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ranges = <0x70000000 0x70000000 0x40000000>,
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<0x00000000 0xd0000000 0x20000000>;
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dma-ranges = <0x0 0x20000000 0x40000000>;
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device@70000000 {
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reg = <0x70000000 0x1000>;
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};
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bus@80000000 {
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#address-cells = <2>;
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#size-cells = <2>;
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ranges = <0x0 0x0 0x80000000 0x0 0x100000>;
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dma-ranges = <0x1 0x0 0x0 0x20 0x0>;
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device@1000 {
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reg = <0x0 0x1000 0x0 0x1000>;
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};
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};
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pci@90000000 {
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device_type = "pci";
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#address-cells = <3>;
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#size-cells = <2>;
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reg = <0x90000000 0x1000>;
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ranges = <0x42000000 0x0 0x40000000 0x40000000 0x0 0x10000000>;
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dma-ranges = <0x42000000 0x0 0x80000000 0x00000000 0x0 0x10000000>,
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<0x42000000 0x0 0xc0000000 0x20000000 0x0 0x10000000>;
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};
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};
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};
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};
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