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| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml index 27c0dd7a8df0..76d956b4a537 100644 --- a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml +++ b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml @@ -220,12 +220,65 @@ patternProperties: minimum: 0 maximum: 3 + skew-delay-input-ps: + description: | + IO synchronization skew rate applied to the input path + enum: [0, 300, 500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000, 3250] + + skew-delay-output-ps: + description: | + IO synchronization latch delay applied to the output path + enum: [0, 300, 500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000, 3250] + + st,io-sync: + $ref: /schemas/types.yaml#/definitions/string + enum: + - pass-through + - clock inverted + - data on rising edge + - data on falling edge + - data on both edges + description: | + IO synchronization through re-sampling or inversion + "pass-through" - data or clock GPIO pass-through + "clock inverted" - clock GPIO inverted + "data on rising edge" - data GPIO re-sampled on clock rising edge + "data on falling edge" - data GPIO re-sampled on clock falling edge + "data on both edges" - data GPIO re-sampled on both clock edges + default: pass-through + required: - pinmux + # Not allowed both skew-delay-input-ps and skew-delay-output-ps + if: + required: + - skew-delay-input-ps + then: + properties: + skew-delay-output-ps: false + allOf: - $ref: pinctrl.yaml# + - if: + not: + properties: + compatible: + contains: + enum: + - st,stm32mp257-pinctrl + - st,stm32mp257-z-pinctrl + then: + patternProperties: + '-[0-9]*$': + patternProperties: + '^pins': + properties: + skew-delay-input-ps: false + skew-delay-output-ps: false + st,io-sync: false + required: - compatible - '#address-cells' @@ -306,4 +359,25 @@ examples: pinctrl-names = "default"; }; + - | + #include <dt-bindings/pinctrl/stm32-pinfunc.h> + //Example 4 skew-delay and st,io-sync + pinctrl: pinctrl@44240000 { + compatible = "st,stm32mp257-pinctrl"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x44240000 0xa0400>; + + eth3_rgmii_pins_a: eth3-rgmii-0 { + pins1 { + pinmux = <STM32_PINMUX('A', 6, AF14)>; + st,io-sync = "data on both edges"; + }; + pins2 { + pinmux = <STM32_PINMUX('H', 2, AF14)>; + skew-delay-output-ps = <500>; + }; + }; + }; + ... |