Similar to the 'dma-coherent' property, some architectures may be coherent by default with some devices being non-coherent. Add a property for this case tool. Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx> --- Companion patch to RISC-V Zicbom noncoherent dma support https://lore.kernel.org/linux-riscv/20220619203212.3604485-1-heiko@xxxxxxxxx/ source/chapter2-devicetree-basics.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/source/chapter2-devicetree-basics.rst b/source/chapter2-devicetree-basics.rst index 47d2fad..bdd7b9f 100644 --- a/source/chapter2-devicetree-basics.rst +++ b/source/chapter2-devicetree-basics.rst @@ -832,6 +832,19 @@ Description: coherent DMA operations. Some architectures have coherent DMA by default and this property is not applicable. +dma-noncoherent +~~~~~~~~~~~~ + +Property name: ``dma-noncoherent`` + +Value type: ``<empty>`` + +Description: + For architectures which are by default coherent for I/O, the + *dma-noncoherent* property is used to indicate a device is not capable of + coherent DMA operations. Some architectures have non-coherent DMA by + default and this property is not applicable. + name (deprecated) ~~~~~~~~~~~~~~~~~ -- 2.35.1
