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Message-ID: <20200303015051.GA780@bogus>
Date: Mon, 2 Mar 2020 19:50:51 -0600
From: Rob Herring <robh@...nel.org>
To: Dilip Kota <eswara.kota@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
kishon@...com, andriy.shevchenko@...el.com,
cheol.yong.kim@...el.com, chuanhua.lei@...ux.intel.com,
qi-ming.wu@...el.com, yixin.zhu@...el.com
Subject: Re: [PATCH v4 2/3] dt-bindings: phy: Add YAML schemas for Intel
Combophy
On Mon, Mar 02, 2020 at 04:43:24PM +0800, Dilip Kota wrote:
> Combophy subsystem provides PHY support to various
> controllers, viz. PCIe, SATA and EMAC.
> Adding YAML schemas for the same.
>
> Signed-off-by: Dilip Kota <eswara.kota@...ux.intel.com>
> ---
> Changes on v4:
> No changes.
>
> Changes on v3:
>
> Add include/dt-bindings/phy/phy-intel-combphy.h for phy modes.
> Add SoC specific compatible "intel,combophy-lgm".
> Correct the nodename pattern.
> clocks description removed and add maxItems entry.
> Remove "simple-bus" as it expects minimum one address
> cell and size cell in the children node. Call devm_of_platform_populate()
> in the driver to perform "simple-bus" functionality.
>
> Changes on v2:
>
> Add custom 'select'
> Pass hardware instance entries with phandles and
> remove cell-index and bid entries
> Clock, register address space, are same for the children.
> So move them to parent node.
> Two PHY instances cannot run in different modes,
> so move the phy-mode entry to parent node.
> Add second child entry in the DT example.
>
> .../devicetree/bindings/phy/intel,combo-phy.yaml | 123 +++++++++++++++++++++
> include/dt-bindings/phy/phy-intel-combophy.h | 10 ++
> 2 files changed, 133 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/intel,combo-phy.yaml
> create mode 100644 include/dt-bindings/phy/phy-intel-combophy.h
>
> diff --git a/Documentation/devicetree/bindings/phy/intel,combo-phy.yaml b/Documentation/devicetree/bindings/phy/intel,combo-phy.yaml
> new file mode 100644
> index 000000000000..f9bae37fab17
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/intel,combo-phy.yaml
> @@ -0,0 +1,123 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/intel,combo-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Intel ComboPhy Subsystem
> +
> +maintainers:
> + - Dilip Kota <eswara.kota@...ux.intel.com>
> +
> +description: |
> + Intel Combophy subsystem supports PHYs for PCIe, EMAC and SATA
> + controllers. A single Combophy provides two PHY instances.
> +
> +properties:
> + $nodename:
> + pattern: "combophy(@.*|-[0-9a-f])*$"
> +
> + compatible:
> + items:
> + - const: intel,combophy-lgm
> + - const: intel,combo-phy
> +
> + clocks:
> + maxItems: 1
> +
> + reg:
> + items:
> + - description: ComboPhy core registers
> + - description: PCIe app core control registers
> +
> + reg-names:
> + items:
> + - const: core
> + - const: app
> +
> + resets:
> + maxItems: 2
> +
> + reset-names:
> + items:
> + - const: phy
> + - const: core
> +
> + intel,syscfg:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
> + description: Chip configuration registers handle and ComboPhy instance id
> +
> + intel,hsio:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
> + description: HSIO registers handle and ComboPhy instance id on NOC
> +
> + intel,aggregation:
> + type: boolean
> + description: |
> + Specify the flag to configure ComboPHY in dual lane mode.
> +
> + intel,phy-mode:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: |
> + Mode of the two phys in ComboPhy.
> + See dt-bindings/phy/phy-intel-combophy.h for values.
> +
> +patternProperties:
> + "^phy@[0-9]+$":
> + type: object
> +
> + properties:
> + compatible:
> + const: intel,phydev
> +
> + "#phy-cells":
> + const: 0
> +
> + resets:
> + description: |
> + reset handle according to the PHY mode.
> + See ../reset/reset.txt for details.
> +
> + required:
> + - compatible
> + - "#phy-cells"
> +
> +required:
> + - compatible
> + - clocks
> + - reg
> + - reg-names
> + - intel,syscfg
> + - intel,hsio
> + - intel,phy-mode
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/phy/phy-intel-combophy.h>
> + combophy@...00000 {
> + compatible = "intel,combophy-lgm", "intel,combo-phy";
> + clocks = <&cgu0 1>;
> + reg = <0xd0a00000 0x40000>,
> + <0xd0a40000 0x1000>;
> + reg-names = "core", "app";
> + resets = <&rcu0 0x50 6>,
> + <&rcu0 0x50 17>;
> + reset-names = "phy", "core";
> + intel,syscfg = <&sysconf 0>;
> + intel,hsio = <&hsiol 0>;
> + intel,phy-mode = <COMBO_PHY_PCIE>;
> +
> + phy@0 {
You need a 'reg' property to go with a unit-address.
Really, I'd just simplify this to make parent 'resets' be 4 entries and
put '#phy-cells = <1>;' in the parent. Then you don't need these child
nodes.
> + compatible = "intel,phydev";
> + #phy-cells = <0>;
> + resets = <&rcu0 0x50 23>;
> + };
> +
> + phy@1 {
> + compatible = "intel,phydev";
> + #phy-cells = <0>;
> + resets = <&rcu0 0x50 24>;
> + };
> + };
> diff --git a/include/dt-bindings/phy/phy-intel-combophy.h b/include/dt-bindings/phy/phy-intel-combophy.h
> new file mode 100644
> index 000000000000..bd7f6377f4ef
> --- /dev/null
> +++ b/include/dt-bindings/phy/phy-intel-combophy.h
> @@ -0,0 +1,10 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +
> +#ifndef _DT_BINDINGS_INTEL_COMBOPHY
> +#define _DT_BINDINGS_INTEL_COMBOPHY
> +
> +#define COMBO_PHY_PCIE 0
> +#define COMBO_PHY_XPCS 1
> +#define COMBO_PHY_SATA 2
Use the PHY_TYPE_* defines we already have and extend as you need to.
> +
> +#endif /* _DT_BINDINGS_INTEL_COMBOPHY*/
> --
> 2.11.0
>
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