Hi Rob, Am Montag, 27. Juni 2022, 17:51:51 CEST schrieb Heiko Stübner: > Am Montag, 27. Juni 2022, 17:14:45 CEST schrieb Rob Herring: > > On Sun, Jun 19, 2022 at 2:37 PM Heiko Stuebner <heiko@xxxxxxxxx> wrote: > > > > > > 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. > > > > Looks fine, but I also need a schema. > > > > Yeah, that's redundant unfortunately. Maybe someday someone will care > > enough to generate the spec from the schemas. > > No worries and sorry I didn't think of where the schema comes from > in the first place. I'll do the relevant schema work as well. Done in https://github.com/devicetree-org/dt-schema/pull/78 . I wasn't sure about the "development model" of dt-schema [0] but there were already github pull-requests pending, so I've added another one for the new property :-) . Heiko [0] The devicetree-specification documentation said mailinglist, though I also see pull-requests there now that I was looking at github. > > > 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 > > > > > > >
