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Date: Wed, 29 Jan 2020 12:08:10 -0800
From: Matthias Kaehlcke <mka@...omium.org>
To: Sandeep Maheswaram <sanm@...eaurora.org>
Cc: Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Kishon Vijay Abraham I <kishon@...com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Stephen Boyd <swboyd@...omium.org>,
Doug Anderson <dianders@...omium.org>,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org
Subject: Re: [PATCH v4 1/8] dt-bindings: phy: qcom,qusb2: Convert QUSB2 phy
bindings to yaml
Hi Sandeep,
On Wed, Jan 29, 2020 at 07:21:52PM +0530, Sandeep Maheswaram wrote:
> Convert QUSB2 phy bindings to DT schema format using json-schema.
>
> Signed-off-by: Sandeep Maheswaram <sanm@...eaurora.org>
> ---
> .../devicetree/bindings/phy/qcom,qusb2-phy.yaml | 142 +++++++++++++++++++++
> .../devicetree/bindings/phy/qcom-qusb2-phy.txt | 68 ----------
> 2 files changed, 142 insertions(+), 68 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
> delete mode 100644 Documentation/devicetree/bindings/phy/qcom-qusb2-phy.txt
>
> diff --git a/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
> new file mode 100644
> index 0000000..90b3cc6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
> @@ -0,0 +1,142 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/phy/qcom,qusb2-phy.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm QUSB2 phy controller
> +
> +maintainers:
> + - Manu Gautam <mgautam@...eaurora.org>
> +
> +description:
> + QUSB2 controller supports LS/FS/HS usb connectivity on Qualcomm chipsets.
> +
> +properties:
> + compatible:
> + enum:
> + - qcom,msm8996-qusb2-phy
> + - qcom,msm8998-qusb2-phy
> + - qcom,sdm845-qusb2-phy
If you wanted to maintain the comments from the .txt file you could add
them after the compatible string (e.g.
Documentation/devicetree/bindings/pwm/pwm-samsung.yaml)
> + reg:
> + maxItems: 1
> +
> + "#phy-cells":
> + const: 0
> +
> + clocks:
> + minItems: 2
maxItems: 3 ?
> + items:
> + - description: phy config clock
> + - description: 19.2 MHz ref clk
> + - description: phy interface clock (Optional)
> +
> + clock-names:
> + minItems: 2
maxItems: 3 ?
> + items:
> + - const: cfg_ahb
> + - const: ref
> + - const: iface
> +
> + vdda-pll-supply:
> + description:
> + Phandle to 1.8V regulator supply to PHY refclk pll block.
> +
> + vdda-phy-dpdm-supply:
> + description:
> + Phandle to 3.1V regulator supply to Dp/Dm port signals.
> +
> + resets:
> + maxItems: 1
description:
Phandle to reset to phy block.
> +
> + nvmem-cells:
> + maxItems: 1
> + description:
> + Phandle to nvmem cell that contains 'HS Tx trim'
> + tuning parameter value for qusb2 phy.
> +
> + qcom,tcsr-syscon:
> + description:
> + Phandle to TCSR syscon register region.
> + $ref: /schemas/types.yaml#/definitions/cell
> +
> + qcom,imp-res-offset-value:
> + description:
> + It is a 6 bit value that specifies offset to be
> + added to PHY refgen RESCODE via IMP_CTRL1 register. It is a PHY
> + tuning parameter that may vary for different boards of same SOC.
> + This property is applicable to only QUSB2 v2 PHY.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - minimum: 0
> + maximum: 63
> + default: 0
> +
> + qcom,hstx-trim-value:
> + description:
> + It is a 4 bit value that specifies tuning for HSTX
> + output current.
> + Possible range is - 15mA to 24mA (stepsize of 600 uA).
> + See dt-bindings/phy/phy-qcom-qusb2.h for applicable values.
> + This property is applicable to only QUSB2 v2 PHY.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - minimum: 0
> + maximum: 15
> + default: 3
> +
> + qcom,preemphasis-level:
> + description:
> + It is a 2 bit value that specifies pre-emphasis level.
> + Possible range is 0 to 15% (stepsize of 5%).
> + See dt-bindings/phy/phy-qcom-qusb2.h for applicable values.
> + This property is applicable to only QUSB2 v2 PHY.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - minimum: 0
> + maximum: 3
> + default: 2
> +
> + qcom,preemphasis-width:
> + description:
> + It is a 1 bit value that specifies how long the HSTX
> + pre-emphasis (specified using qcom,preemphasis-level) must be in
> + effect. Duration could be half-bit of full-bit.
> + See dt-bindings/phy/phy-qcom-qusb2.h for applicable values.
> + This property is applicable to only QUSB2 v2 PHY.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - minimum: 0
> + maximum: 1
> + default: 0
I think you could put the properties that are only applicable for QUSB2
v2 PHY into a block like this and remove the 'This property is
applicable to only QUSB2 v2 PHY.' comment from the property description:
if:
properties:
compatible:
contains:
const: qcom,sdm845-qusb2-phy
then:
qcom,imp-res-offset-value:
...
Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
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