linux-kernel - Re: [PATCH v3 13/14] dt-bindings: phy: Document WIZ (SERDES wrapper) bindings

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Message-ID: <b7b455b4-8001-a80b-6620-ae1df10e6047@ti.com>
Date:   Mon, 16 Dec 2019 15:25:07 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Rob Herring <robh@...nel.org>
CC:     Anil Varughese <aniljoy@...ence.com>,
        Roger Quadros <rogerq@...com>, Jyri Sarha <jsarha@...com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 13/14] dt-bindings: phy: Document WIZ (SERDES wrapper)
 bindings

Hi Rob,

On 14/12/19 2:31 am, Rob Herring wrote:
> On Thu, Nov 28, 2019 at 04:16:47PM +0530, Kishon Vijay Abraham I wrote:
>> Add DT binding documentation for WIZ (SERDES wrapper). WIZ is *NOT* a
>> PHY but a wrapper used to configure some of the input signals to the
>> SERDES. It is used with both Sierra(16G) and Torrent(10G) serdes.
>>
>> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
>> [jsarha@...com: Add separate compatible for Sierra(16G) and Torrent(10G)
>>   SERDES]
>> Signed-off-by: Jyri Sarha <jsarha@...com>
>> ---
>>   .../bindings/phy/ti,phy-j721e-wiz.yaml        | 158 ++++++++++++++++++
>>   1 file changed, 158 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml b/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml
>> new file mode 100644
>> index 000000000000..5cd6f907f6af
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml
>> @@ -0,0 +1,158 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +# Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
>> +%YAML 1.2
>> +---
>> +$id: "http://devicetree.org/schemas/phy/ti,phy-j721e-wiz.yaml#"
>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
>> +
>> +title: TI J721E WIZ (SERDES Wrapper)
>> +
>> +maintainers:
>> +  - Kishon Vijay Abraham I <kishon@...com>
>> +
>> +properties:
>> +  compatible:
>> +      enum:
>> +          - ti,j721e-wiz-16g
>> +          - ti,j721e-wiz-10g
>> +
>> +  power-domains:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 3
>> +    description: clock-specifier to represent input to the WIZ
>> +
>> +  clock-names:
>> +    items:
>> +      - const: fck
>> +      - const: core_ref_clk
>> +      - const: ext_ref_clk
>> +
>> +  num-lanes:
>> +    minimum: 1
>> +    maximum: 4
>> +
>> +  "#address-cells":
>> +    const: 1
>> +
>> +  "#size-cells":
>> +    const: 1
>> +
>> +  "#reset-cells":
>> +    const: 1
>> +
>> +  ranges: true
>> +
>> +  assigned-clocks:
>> +    maxItems: 2
>> +
>> +  assigned-clock-parents:
>> +    maxItems: 2
>> +
>> +patternProperties:
>> +  "^pll[0|1]_refclk$":
> 
> Use '-' rather than '_' in node names.
> 
>> +    type: object
>> +    description: |
>> +      WIZ node should have subnodes for each of the PLLs present in
>> +      the SERDES.
> 
> No properties in each of these nodes? They need to be defined.
> 
>> +
>> +  "^cmn_refclk1?_dig_div$":
>> +    type: object
>> +    description: |
>> +      WIZ node should have subnodes for each of the PMA common refclock
>> +      provided by the SERDES.
>> +
>> +  "^refclk_dig$":
>> +    type: object
>> +    description: |
>> +      WIZ node should have subnode for refclk_dig to select the reference
>> +      clock source for the reference clock used in the PHY and PMA digital
>> +      logic.
>> +
>> +  "^serdes@[0-9a-f]+$":
>> +    type: object
>> +    description: |
>> +      WIZ node should have '1' subnode for the SERDES. It could be either
>> +      Sierra SERDES or Torrent SERDES. Sierra SERDES should follow the
>> +      bindings specified in
>> +      Documentation/devicetree/bindings/phy/phy-cadence-sierra.txt
>> +      Torrent SERDES should follow the bindings specified in
>> +      Documentation/devicetree/bindings/phy/phy-cadence-dp.txt
>> +
>> +required:
>> +  - compatible
>> +  - power-domains
>> +  - clocks
>> +  - clock-names
>> +  - num-lanes
>> +  - "#address-cells"
>> +  - "#size-cells"
>> +  - "#reset-cells"
>> +  - ranges
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
>> +
>> +    wiz@...0000 {
>> +           compatible = "ti,j721e-wiz-16g";
>> +           #address-cells = <1>;
>> +           #size-cells = <1>;
>> +           power-domains = <&k3_pds 292 TI_SCI_PD_EXCLUSIVE>;
>> +           clocks = <&k3_clks 292 5>, <&k3_clks 292 11>, <&dummy_cmn_refclk>;
>> +           clock-names = "fck", "core_ref_clk", "ext_ref_clk";
>> +           assigned-clocks = <&k3_clks 292 11>, <&k3_clks 292 0>;
>> +           assigned-clock-parents = <&k3_clks 292 15>, <&k3_clks 292 4>;
>> +           num-lanes = <2>;
>> +           #reset-cells = <1>;
>> +           ranges = <0x5000000 0x0 0x5000000 0x10000>;
>> +
>> +           pll0_refclk {
>> +                  clocks = <&k3_clks 293 13>, <&dummy_cmn_refclk>;
>> +                  clock-output-names = "wiz1_pll0_refclk";
> 
> Kind of pointless with only 1 output.

Okay. I'll fix all your comments in v4.

Thanks
Kishon