| Message ID | 20240827122459.1102889-2-christian.bruel@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add STM32MP25 USB3/PCIE COMBOPHY driver | expand |
On 27/08/2024 14:24, Christian Bruel wrote: > Document the bindings for STM32 COMBOPHY interface, used to support > the PCIe and USB3 stm32mp25 drivers. > Following entries can be used to tune caracterisation parameters > - st,output-micro-ohms and st,output-vswing-microvolt bindings entries > to tune the impedance and voltage swing using discrete simulation results > - st,rx-equalizer register to set the internal rx equalizer filter value. > > Reviewed-by: Rob Herring (Arm) <robh@kernel.org> > Signed-off-by: Christian Bruel <christian.bruel@foss.st.com> v1? Or v3? > --- > .../bindings/phy/st,stm32-combophy.yaml | 144 ++++++++++++++++++ > 1 file changed, 144 insertions(+) > create mode 100644 Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml > > diff --git a/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml b/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml > new file mode 100644 > index 000000000000..c33a843b83a3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml Filename matching compatible. > @@ -0,0 +1,144 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/phy/st,stm32-combophy.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: STMicroelectronics STM32MP25 USB3/PCIe COMBOPHY > + > +maintainers: > + - Christian Bruel <christian.bruel@foss.st.com> > + > +description: > + Single lane PHY shared (exclusive) between the USB3 and PCIe controllers. > + Supports 5Gbit/s for USB3 and PCIe gen2 or 2.5Gbit/s for PCIe gen1. > + > +properties: > + compatible: > + const: st,stm32mp25-combophy > + > + reg: > + maxItems: 1 > + > + "#phy-cells": > + const: 1 > + description: | > + The cells contain the following arguments. > + > + - description: The PHY type That's some sort of mess. Is it schema within description or schema? Why two descriptions? > + enum: > + - PHY_TYPE_USB3 > + - PHY_TYPE_PCIE > + ... > +required: > + - compatible > + - reg > + - st,syscfg > + - '#phy-cells' > + - resets > + - reset-names > + - clocks > + - clock-names > + > +allOf: > + - if: > + required: > + - wakeup-source > + then: > + anyOf: > + - required: [interrupts] > + - required: [interrupts-extended] > + I do not see any improvements. The tag you received was CONDITIONAL. If you do not apply the comments, you cannot just apply the tag. Best regards, Krzysztof
On 8/27/24 15:23, Krzysztof Kozlowski wrote: > On 27/08/2024 14:24, Christian Bruel wrote: >> Document the bindings for STM32 COMBOPHY interface, used to support >> the PCIe and USB3 stm32mp25 drivers. >> Following entries can be used to tune caracterisation parameters >> - st,output-micro-ohms and st,output-vswing-microvolt bindings entries >> to tune the impedance and voltage swing using discrete simulation results >> - st,rx-equalizer register to set the internal rx equalizer filter value. >> >> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> >> Signed-off-by: Christian Bruel <christian.bruel@foss.st.com> > v1? Or v3? sorry, forgot to update Subject: it is v3, will resend a v4 with your further comments Regards Christian > >> --- >> .../bindings/phy/st,stm32-combophy.yaml | 144 ++++++++++++++++++ >> 1 file changed, 144 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml >> >> diff --git a/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml b/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml >> new file mode 100644 >> index 000000000000..c33a843b83a3 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml > Filename matching compatible. ok > >> @@ -0,0 +1,144 @@ >> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/phy/st,stm32-combophy.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: STMicroelectronics STM32MP25 USB3/PCIe COMBOPHY >> + >> +maintainers: >> + - Christian Bruel <christian.bruel@foss.st.com> >> + >> +description: >> + Single lane PHY shared (exclusive) between the USB3 and PCIe controllers. >> + Supports 5Gbit/s for USB3 and PCIe gen2 or 2.5Gbit/s for PCIe gen1. >> + >> +properties: >> + compatible: >> + const: st,stm32mp25-combophy >> + >> + reg: >> + maxItems: 1 >> + >> + "#phy-cells": >> + const: 1 >> + description: | >> + The cells contain the following arguments. >> + >> + - description: The PHY type > That's some sort of mess. Is it schema within description or schema? Why > two descriptions? yes, indeed >> + enum: >> + - PHY_TYPE_USB3 >> + - PHY_TYPE_PCIE >> + > ... > >> +required: >> + - compatible >> + - reg >> + - st,syscfg >> + - '#phy-cells' >> + - resets >> + - reset-names >> + - clocks >> + - clock-names >> + >> +allOf: >> + - if: >> + required: >> + - wakeup-source >> + then: >> + anyOf: >> + - required: [interrupts] >> + - required: [interrupts-extended] >> + > I do not see any improvements. > > The tag you received was CONDITIONAL. If you do not apply the comments, > you cannot just apply the tag. my mistake again. > Best regards, > Krzysztof >
diff --git a/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml b/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml new file mode 100644 index 000000000000..c33a843b83a3 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/st,stm32-combophy.yaml @@ -0,0 +1,144 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/phy/st,stm32-combophy.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STMicroelectronics STM32MP25 USB3/PCIe COMBOPHY + +maintainers: + - Christian Bruel <christian.bruel@foss.st.com> + +description: + Single lane PHY shared (exclusive) between the USB3 and PCIe controllers. + Supports 5Gbit/s for USB3 and PCIe gen2 or 2.5Gbit/s for PCIe gen1. + +properties: + compatible: + const: st,stm32mp25-combophy + + reg: + maxItems: 1 + + "#phy-cells": + const: 1 + description: | + The cells contain the following arguments. + + - description: The PHY type + enum: + - PHY_TYPE_USB3 + - PHY_TYPE_PCIE + + clocks: + minItems: 2 + items: + - description: apb Bus clock mandatory to access registers. + - description: ker Internal RCC reference clock for USB3 or PCIe + - description: pad Optional on board clock input for PCIe only. Typically an + external 100Mhz oscillator wired on dedicated CLKIN pad. Used as reference + clock input instead of the ker + + clock-names: + minItems: 2 + items: + - const: apb + - const: ker + - const: pad + + resets: + maxItems: 1 + + reset-names: + const: phy + + power-domains: + maxItems: 1 + + wakeup-source: true + + interrupts: + maxItems: 1 + description: interrupt used for wakeup + + access-controllers: + minItems: 1 + maxItems: 2 + + st,syscfg: + $ref: /schemas/types.yaml#/definitions/phandle + description: Phandle to the SYSCON entry required for configuring PCIe + or USB3. + + st,ssc-on: + type: boolean + description: + A boolean property whose presence indicates that the SSC for common clock + needs to be set. + + st,rx-equalizer: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 7 + default: 2 + description: + A 3 bit value to tune the RX fixed equalizer setting for optimal eye compliance + + st,output-micro-ohms: + minimum: 3999000 + maximum: 6090000 + default: 4968000 + description: + A value property to tune the Single Ended Output Impedance, simulations results + at 25C for a VDDP=0.8V. The hardware accepts discrete values in this range. + + st,output-vswing-microvolt: + minimum: 442000 + maximum: 803000 + default: 803000 + description: + A value property in microvolt to tune the Single Ended Output Voltage Swing to change the + Vlo, Vhi for a VDDP = 0.8V. The hardware accepts discrete values in this range. + +required: + - compatible + - reg + - st,syscfg + - '#phy-cells' + - resets + - reset-names + - clocks + - clock-names + +allOf: + - if: + required: + - wakeup-source + then: + anyOf: + - required: [interrupts] + - required: [interrupts-extended] + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/st,stm32mp25-rcc.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/reset/st,stm32mp25-rcc.h> + + combophy: phy@480c0000 { + compatible = "st,stm32mp25-combophy"; + reg = <0x480c0000 0x1000>; + #phy-cells = <1>; + clocks = <&rcc CK_BUS_USB3PCIEPHY>, <&rcc CK_KER_USB3PCIEPHY>; + clock-names = "apb", "ker"; + resets = <&rcc USB3PCIEPHY_R>; + reset-names = "phy"; + st,syscfg = <&syscfg>; + access-controllers = <&rifsc 67>; + power-domains = <&CLUSTER_PD>; + wakeup-source; + interrupts-extended = <&exti1 45 IRQ_TYPE_EDGE_FALLING>; + }; +...