RE: [PATCH v2 net-next 03/13] dt-bindings: net: add bindings for NETC blocks control

[Wei Fang <wei.fang@xxxxxxx>]

> -----Original Message-----
> From: Frank Li <frank.li@xxxxxxx>
> Sent: 2024年10月15日 23:45
> To: Wei Fang <wei.fang@xxxxxxx>
> Cc: davem@xxxxxxxxxxxxx; edumazet@xxxxxxxxxx; kuba@xxxxxxxxxx;
> pabeni@xxxxxxxxxx; robh@xxxxxxxxxx; krzk+dt@xxxxxxxxxx;
> conor+dt@xxxxxxxxxx; Vladimir Oltean <vladimir.oltean@xxxxxxx>; Claudiu
> Manoil <claudiu.manoil@xxxxxxx>; Clark Wang <xiaoning.wang@xxxxxxx>;
> christophe.leroy@xxxxxxxxxx; linux@xxxxxxxxxxxxxxx; bhelgaas@xxxxxxxxxx;
> horms@xxxxxxxxxx; imx@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linux-pci@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH v2 net-next 03/13] dt-bindings: net: add bindings for NETC
> blocks control
> 
> On Tue, Oct 15, 2024 at 08:58:31PM +0800, Wei Fang wrote:
> > Add bindings for NXP NETC blocks control. Usually, NETC has 2 blocks
> > of 64KB registers, integrated endpoint register block (IERB) and
> > privileged register block (PRB). IERB is used for pre-boot
> > initialization for all NETC devices, such as ENETC, Timer, EMIDO and
> > so on. And PRB controls global reset and global error handling for
> > NETC. Moreover, for the i.MX platform, there is also a NETCMIX block
> > for link configuration, such as MII protocol, PCS protocol, etc.
> >
> > Signed-off-by: Wei Fang <wei.fang@xxxxxxx>
> > ---
> > v2 changes:
> > 1. Rephrase the commit message.
> > 2. Change unevaluatedProperties to additionalProperties.
> > 3. Remove the useless lables from examples.
> > ---
> >  .../bindings/net/nxp,netc-blk-ctrl.yaml       | 107
> ++++++++++++++++++
> >  1 file changed, 107 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/net/nxp,netc-blk-ctrl.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/net/nxp,netc-blk-ctrl.yaml
> > b/Documentation/devicetree/bindings/net/nxp,netc-blk-ctrl.yaml
> > new file mode 100644
> > index 000000000000..18a6ccf6bc2e
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/nxp,netc-blk-ctrl.yaml
> > @@ -0,0 +1,107 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/nxp,netc-blk-ctrl.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: NETC Blocks Control
> > +
> > +description:
> > +  Usually, NETC has 2 blocks of 64KB registers, integrated endpoint
> > +register
> > +  block (IERB) and privileged register block (PRB). IERB is used for
> > +pre-boot
> > +  initialization for all NETC devices, such as ENETC, Timer, EMIDO and so
> on.
> > +  And PRB controls global reset and global error handling for NETC.
> > +Moreover,
> > +  for the i.MX platform, there is also a NETCMIX block for link
> > +configuration,
> > +  such as MII protocol, PCS protocol, etc.
> > +
> > +maintainers:
> > +  - Wei Fang <wei.fang@xxxxxxx>
> > +  - Clark Wang <xiaoning.wang@xxxxxxx>
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - nxp,imx95-netc-blk-ctrl
> > +
> > +  reg:
> > +    minItems: 2
> > +    maxItems: 3
> > +
> > +  reg-names:
> > +    minItems: 2
> > +    items:
> > +      - const: ierb
> > +      - const: prb
> > +      - const: netcmix
> 
> Is 'netcmix'  optional?
> 

Yes, currently, NETCMIX is only existed on i.MX platforms.

> 
> > +
> > +  "#address-cells":
> > +    const: 2
> > +
> > +  "#size-cells":
> > +    const: 2
> > +
> > +  ranges: true
> > +
> > +  clocks:
> > +    items:
> > +      - description: NETC system clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: ipg_clk
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +patternProperties:
> > +  "^pcie@[0-9a-f]+$":
> > +    $ref: /schemas/pci/host-generic-pci.yaml#
> > +
> > +required:
> > +  - compatible
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +  - reg
> > +  - reg-names
> > +  - ranges
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    bus {
> > +        #address-cells = <2>;
> > +        #size-cells = <2>;
> > +
> > +        netc-blk-ctrl@4cde0000 {
> > +            compatible = "nxp,imx95-netc-blk-ctrl";
> > +            reg = <0x0 0x4cde0000 0x0 0x10000>,
> > +                  <0x0 0x4cdf0000 0x0 0x10000>,
> > +                  <0x0 0x4c81000c 0x0 0x18>;
> > +            reg-names = "ierb", "prb", "netcmix";
> > +            #address-cells = <2>;
> > +            #size-cells = <2>;
> > +            ranges;
> > +            clocks = <&scmi_clk 98>;
> > +            clock-names = "ipg_clk";
> > +            power-domains = <&scmi_devpd 18>;
> > +
> > +            pcie@4cb00000 {
> > +                compatible = "pci-host-ecam-generic";
> > +                reg = <0x0 0x4cb00000 0x0 0x100000>;
> > +                #address-cells = <3>;
> > +                #size-cells = <2>;
> > +                device_type = "pci";
> > +                bus-range = <0x1 0x1>;
> > +                ranges = <0x82000000 0x0 0x4cce0000  0x0
> 0x4cce0000  0x0 0x20000
> > +                          0xc2000000 0x0 0x4cd10000  0x0
> 0x4cd10000
> > + 0x0 0x10000>;
> > +
> > +                mdio@0,0 {
> > +                    compatible = "pci1131,ee00";
> > +                    reg = <0x010000 0 0 0 0>;
> > +                    #address-cells = <1>;
> > +                    #size-cells = <0>;
> > +                };
> > +            };
> > +        };
> > +    };
> > --
> > 2.34.1
> >