Em Thu, 15 Jul 2021 11:23:37 -0600 Rob Herring <robh@xxxxxxxxxx> escreveu: > On Tue, Jul 13, 2021 at 01:17:51PM +0200, Mauro Carvalho Chehab wrote: > > Currently, the designware schema is defined on a text file: > > designware-pcie.txt > > > > Convert the pci-bus part into a schema. > > > > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> > > --- > > .../devicetree/bindings/pci/snps,dw-pcie.yaml | 96 +++++++++++++++++++ > > MAINTAINERS | 1 + > > 2 files changed, 97 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml > > > > diff --git a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml > > new file mode 100644 > > index 000000000000..fd372d715ab4 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml > > @@ -0,0 +1,96 @@ > > +# SPDX-License-Identifier: GPL-2.0 > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/pci/snps,dw-pcie.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Synopsys DesignWare PCIe interface > > + > > +maintainers: > > + - Jingoo Han <jingoohan1@xxxxxxxxx> > > + - Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx> > > + > > +description: | > > + Synopsys DesignWare PCIe host controller > > + > > +allOf: > > + - $ref: /schemas/pci/pci-bus.yaml# > > + > > +properties: > > + compatible: > > + anyOf: > > + - {} > > + - const: snps,dw-pcie > > + > > + reg: > > + description: | > > + It should contain Data Bus Interface (dbi) and config registers for all > > + versions. > > + For designware core version >= 4.80, it may contain ATU address space. > > + minItems: 2 > > + maxItems: 4 > > + > > + reg-names: > > + minItems: 2 > > + maxItems: 4 > > + items: > > + enum: [dbi, dbi2, config, atu, addr_space, app, elbi, mgmt] > > Isn't 'config' only for host and 'addr_space' only for endpoint? The problem on enforcing an enum here is that severa *.dts files violate it. In the specific case of 'addr_space', there is (are?) place(s) where the wrong compatible was used, like on arch/arm/boot/dts/artpec6.dtsi: pcie: pcie@f8050000 { compatible = "axis,artpec6-pcie", "snps,dw-pcie"; reg = <0xf8050000 0x2000 0xf8040000 0x1000 0xc0000000 0x2000>; reg-names = "dbi", "phy", "config"; #address-cells = <3>; #size-cells = <2>; device_type = "pci"; /* downstream I/O */ ranges = <0x81000000 0 0 0xc0002000 0 0x00010000 /* non-prefetchable memory */ 0x82000000 0 0xc0012000 0xc0012000 0 0x1ffee000>; num-lanes = <2>; bus-range = <0x00 0xff>; interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>; interrupt-names = "msi"; #interrupt-cells = <1>; interrupt-map-mask = <0 0 0 0x7>; interrupt-map = <0 0 0 1 &intc GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>, <0 0 0 2 &intc GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>, <0 0 0 3 &intc GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>, <0 0 0 4 &intc GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>; axis,syscon-pcie = <&syscon>; status = "disabled"; }; pcie_ep: pcie_ep@f8050000 { compatible = "axis,artpec6-pcie-ep", "snps,dw-pcie"; reg = <0xf8050000 0x2000 0xf8051000 0x2000 0xf8040000 0x1000 0xc0000000 0x20000000>; reg-names = "dbi", "dbi2", "phy", "addr_space"; num-ib-windows = <6>; num-ob-windows = <2>; num-lanes = <2>; axis,syscon-pcie = <&syscon>; status = "disabled"; }; (funny enough, this is not generating warnings here). Btw, besides the above, there are some DTS that use something different from what's there at the enum: $ make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 dtbs_check 2>&1 |tee dtbs_check.log $ grep "\['dbi', 'dbi2', 'config', 'atu', 'app', 'elbi', 'mgmt'\]" dtbs_check.log|sed "s,From schema:,,"|cut -d: -f 2-|cut -d' ' -f 4-|sort|uniq -c|sort -n -r 51 'ctrl' is not one of ['dbi', 'dbi2', 'config', 'atu', 'app', 'elbi', 'mgmt'] 44 'parf' is not one of ['dbi', 'dbi2', 'config', 'atu', 'app', 'elbi', 'mgmt'] 18 'cfg' is not one of ['dbi', 'dbi2', 'config', 'atu', 'app', 'elbi', 'mgmt'] 4 'link' is not one of ['dbi', 'dbi2', 'config', 'atu', 'app', 'elbi', 'mgmt'] In order to use an enum and not having warnings, the enum should be instead: reg-names: minItems: 2 maxItems: 4 items: enum: [dbi, dbi2, config, atu, app, elbi, mgmt, ctrl, parf, cfg, link] Thanks, Mauro
