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Diffstat (limited to 'dts/Bindings/pinctrl/microchip,sparx5-sgpio.yaml')
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1 files changed, 161 insertions, 0 deletions
diff --git a/dts/Bindings/pinctrl/microchip,sparx5-sgpio.yaml b/dts/Bindings/pinctrl/microchip,sparx5-sgpio.yaml new file mode 100644 index 0000000000..df0c83cb1c --- /dev/null +++ b/dts/Bindings/pinctrl/microchip,sparx5-sgpio.yaml @@ -0,0 +1,161 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/microchip,sparx5-sgpio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microsemi/Microchip Serial GPIO controller + +maintainers: + - Lars Povlsen <lars.povlsen@microchip.com> + +description: | + By using a serial interface, the SIO controller significantly extend + the number of available GPIOs with a minimum number of additional + pins on the device. The primary purpose of the SIO controllers is to + connect control signals from SFP modules and to act as an LED + controller. + +properties: + $nodename: + pattern: "^gpio@[0-9a-f]+$" + + compatible: + enum: + - microchip,sparx5-sgpio + - mscc,ocelot-sgpio + - mscc,luton-sgpio + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + microchip,sgpio-port-ranges: + description: This is a sequence of tuples, defining intervals of + enabled ports in the serial input stream. The enabled ports must + match the hardware configuration in order for signals to be + properly written/read to/from the controller holding + registers. Being tuples, then number of arguments must be + even. The tuples mast be ordered (low, high) and are + inclusive. + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + items: + - description: | + "low" indicates start bit number of range + minimum: 0 + maximum: 31 + - description: | + "high" indicates end bit number of range + minimum: 0 + maximum: 31 + minItems: 1 + maxItems: 32 + + bus-frequency: + description: The sgpio controller frequency (Hz). This dictates + the serial bitstream speed, which again affects the latency in + getting control signals back and forth between external shift + registers. The speed must be no larger than half the system + clock, and larger than zero. + default: 12500000 + +patternProperties: + "^gpio@[0-1]$": + type: object + properties: + compatible: + const: microchip,sparx5-sgpio-bank + + reg: + description: | + The GPIO bank number. "0" is designates the input pin bank, + "1" the output bank. + maxItems: 1 + + gpio-controller: true + + '#gpio-cells': + description: | + Specifies the pin (port and bit) and flags. Note that the + SGIO pin is defined by *2* numbers, a port number between 0 + and 31, and a bit index, 0 to 3. The maximum bit number is + controlled indirectly by the "ngpios" property: (ngpios/32). + const: 3 + + interrupts: + description: Specifies the sgpio IRQ (in parent controller) + maxItems: 1 + + interrupt-controller: true + + '#interrupt-cells': + description: + Specifies the pin (port and bit) and flags, as defined in + defined in include/dt-bindings/interrupt-controller/irq.h + const: 3 + + ngpios: + description: The numbers of GPIO's exposed. This must be a + multiple of 32. + minimum: 32 + maximum: 128 + + required: + - compatible + - reg + - gpio-controller + - '#gpio-cells' + - ngpios + + additionalProperties: false + +additionalProperties: false + +required: + - compatible + - reg + - clocks + - microchip,sgpio-port-ranges + - "#address-cells" + - "#size-cells" + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + sgpio2: gpio@1101059c { + #address-cells = <1>; + #size-cells = <0>; + compatible = "microchip,sparx5-sgpio"; + clocks = <&sys_clk>; + pinctrl-0 = <&sgpio2_pins>; + pinctrl-names = "default"; + reg = <0x1101059c 0x100>; + microchip,sgpio-port-ranges = <0 0>, <16 18>, <28 31>; + bus-frequency = <25000000>; + sgpio_in2: gpio@0 { + reg = <0>; + compatible = "microchip,sparx5-sgpio-bank"; + gpio-controller; + #gpio-cells = <3>; + ngpios = <96>; + interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>; + interrupt-controller; + #interrupt-cells = <3>; + }; + sgpio_out2: gpio@1 { + compatible = "microchip,sparx5-sgpio-bank"; + reg = <1>; + gpio-controller; + #gpio-cells = <3>; + ngpios = <96>; + }; + }; |