Hi Nikita, nikita.shubin@xxxxxxxxxxx wrote on Mon, 24 Apr 2023 15:34:38 +0300: > Add YAML bindings for ts7250 NAND. > > Signed-off-by: Nikita Shubin <nikita.shubin@xxxxxxxxxxx> > --- > .../bindings/mtd/technologic,nand.yaml | 56 +++++++++++++++++++ > 1 file changed, 56 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mtd/technologic,nand.yaml > > diff --git a/Documentation/devicetree/bindings/mtd/technologic,nand.yaml b/Documentation/devicetree/bindings/mtd/technologic,nand.yaml > new file mode 100644 > index 000000000000..3234d93a1c21 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/technologic,nand.yaml > @@ -0,0 +1,56 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mtd/technologic,nand.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Technologic Systems NAND controller > + > +maintainers: > + - Lukasz Majewski <lukma@xxxxxxx> > + > +properties: > + compatible: > + items: > + - const: technologic,ts7200-nand would -nand-controller instead of -nand work as a suffix here? You mention ts7250 in the title, should we have a more specific compatible than ts7200 as well? I see by looking at the mtd patch that you actually try to match both, so they should both be defined in the bindings. > + - const: gen_nand This is a old hack for very simple controllers (converted to DT probing 12 years ago). The logic used by this driver has been deprecated for like 10 years and does not really apply to modern APIs. I would really like to keep this driver contained with platform data coming from arch/ data only. I suggest you create a real NAND controller driver based on the generic one (should not be very complex, just duplicate the code so the migration to the up-to-date API is eased) and you flag it as "must be updated to ->exec_op() somehow. This way if someone starts the conversion, it does not need to cope with the 5 other users of the generic driver which anyway share nothing in common besides the deprecated ->cmd_ctrl() backbone. I read the comments on the cover letter, people are kind of pushing on having this merged quickly. I am fine accepting a legacy controller driver and migrating it to ->exec_op() later, but the current driver conversion does not fit the approach taken years ago towards a cleaner mtd tree. > + > + reg: > + maxItems: 1 > + > + '#address-cells': true > + '#size-cells': true > + > +required: > + - compatible > + - reg > + > +unevaluatedProperties: true > + > +examples: > + - | > + nand-parts@0 { > + compatible = "technologic,ts7200-nand", "gen_nand"; > + reg = <0x60000000 0x8000000>; > + #address-cells = <1>; > + #size-cells = <1>; > + > + partition@0 { > + label = "TS-BOOTROM"; > + reg = <0x00000000 0x00020000>; > + read-only; > + }; Partitions are not useful here, but if you want them, use the partitions container instead, please. > + > + partition@20000 { > + label = "Linux"; > + reg = <0x00020000 0x07d00000>; > + }; > + > + partition@7d20000 { > + label = "RedBoot"; > + reg = <0x07d20000 0x002e0000>; > + read-only; > + }; > + }; > + > +... Thanks, Miquèl
