On Fri, 30 Sep 2022 15:06:06 -0700, Julius Werner wrote: > This patch adds a new device tree binding for an LPDDR channel to serve > as a top-level organizing node for LPDDR part nodes nested below it. An > LPDDR channel needs to have an "io-width" property to describe its width > (this is important because this width does not always match the io-width > of the part number, indicating that multiple parts are wired in parallel > on the same channel), as well as one or more nested "rank@X" nodes. > Those represent information about the individual ranks of each LPDDR > part connected on that channel and should match the existing > "jedec,lpddrX" bindings for individual LPDDR parts. > > New platforms should be using this node -- the existing practice of > providing a raw, toplevel "jedec,lpddrX" node without indication of how > many identical parts are in the system should be considered deprecated. > > Signed-off-by: Julius Werner <jwerner@xxxxxxxxxxxx> > --- > .../ddr/jedec,lpddr-channel.yaml | 146 ++++++++++++++++++ > .../ddr/jedec,lpddr-props.yaml | 10 +- > 2 files changed, 155 insertions(+), 1 deletion(-) > create mode 100644 Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-channel.yaml > > Changelog: > > - v2: > - changed $ref for rank subnode to specifically match LPDDR type in > compatible string > - moved `reg` up to be listed right below `compatible` > - v3: > - no changes > - v4: > - no changes > - v5: > - no changes > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
