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Date: Tue, 29 Oct 2019 14:08:16 -0500
From: Rob Herring <robh@...nel.org>
To: Kishon Vijay Abraham I <kishon@...com>
Cc: Roger Quadros <rogerq@...com>, Jyri Sarha <jsarha@...com>,
Anil Varughese <aniljoy@...ence.com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 13/14] dt-bindings: phy: Document WIZ (SERDES wrapper)
bindings
On Wed, Oct 23, 2019 at 06:27:34PM +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 | 159 ++++++++++++++++++
> 1 file changed, 159 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..8a1eccee6c1d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml
> @@ -0,0 +1,159 @@
> +# SPDX-License-Identifier: (GPL-2.0)
(GPL-2.0-only OR BSD-2-Clause) for new bindings please.
> +# 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:
> + oneOf:
> + - items:
> + - enum:
> + - ti,j721e-wiz-16g
> + - ti,j721e-wiz-10g
You can drop oneOf and items.
> +
> + 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:
> + maxItems: 1
> + minimum: 1
> + maximum: 4
You've mixed array and scalar schema keywords. Drop maxItems.
Update dtschema and run 'make dt_binding_check'. We should catch that
now.
> +
> + "#address-cells":
> + const: 2
> +
> + "#size-cells":
> + const: 2
> +
> + "#reset-cells":
> + const: 1
> +
> + ranges: true
> +
> + assigned-clocks:
> + maxItems: 2
> +
> + assigned-clock-parents:
> + maxItems: 2
> +
> +patternProperties:
> + "^pll[0|1]_refclk$":
> + type: object
> + description: |
> + WIZ node should have subnodes for each of the PLLs present in
> + the SERDES.
> +
> + "^cmn_refclk1?$":
> + 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"
> +
> +examples:
> + - |
> + #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +
> + wiz@...0000 {
> + compatible = "ti,j721e-wiz-16g";
> + #address-cells = <2>;
> + #size-cells = <2>;
Really need 64-bits of address space for the child nodes?
> + 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>;
Unless you have additional registers, I'm not a fan of wrapper nodes.
> +
> + pll0_refclk {
> + clocks = <&k3_clks 293 13>, <&dummy_cmn_refclk>;
> + clock-output-names = "wiz1_pll0_refclk";
> + #clock-cells = <0>;
> + assigned-clocks = <&wiz1_pll0_refclk>;
> + assigned-clock-parents = <&k3_clks 293 13>;
> + };
> +
> + pll1_refclk {
> + clocks = <&k3_clks 293 0>, <&dummy_cmn_refclk1>;
> + clock-output-names = "wiz1_pll1_refclk";
> + #clock-cells = <0>;
> + assigned-clocks = <&wiz1_pll1_refclk>;
> + assigned-clock-parents = <&k3_clks 293 0>;
> + };
> +
> + cmn_refclk {
> + clocks = <&wiz1_refclk_dig>;
> + clock-output-names = "wiz1_cmn_refclk";
> + #clock-cells = <0>;
> + };
> +
> + cmn_refclk1 {
> + clocks = <&wiz1_pll1_refclk>;
> + clock-output-names = "wiz1_cmn_refclk1";
> + #clock-cells = <0>;
> + };
> +
> + refclk_dig {
> + clocks = <&k3_clks 292 11>, <&k3_clks 292 0>, <&dummy_cmn_refclk>, <&dummy_cmn_refclk1>;
> + clock-output-names = "wiz0_refclk_dig";
> + #clock-cells = <0>;
> + assigned-clocks = <&wiz0_refclk_dig>;
> + assigned-clock-parents = <&k3_clks 292 11>;
> + };
How are all these clocks programmed?
> +
> + serdes@...0000 {
> + compatible = "cdns,ti,sierra-phy-t0";
> + reg-names = "serdes";
> + reg = <0x00 0x5000000 0x00 0x10000>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + resets = <&serdes_wiz0 0>;
> + reset-names = "sierra_reset";
> + clocks = <&wiz0_cmn_refclk>, <&wiz0_cmn_refclk1>;
> + clock-names = "cmn_refclk", "cmn_refclk1";
> + };
> + };
> --
> 2.17.1
>
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