2023-08-30 17:31:07 +02:00
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/fpga/lattice,sysconfig.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Lattice Slave SPI sysCONFIG FPGA manager
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maintainers:
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2023-10-24 12:59:35 +02:00
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- Vladimir Georgiev <v.georgiev@metrotek.ru>
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2023-08-30 17:31:07 +02:00
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description: |
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Lattice sysCONFIG port, which is used for FPGA configuration, among others,
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have Slave Serial Peripheral Interface. Only full reconfiguration is
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supported.
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Programming of ECP5 is done by writing uncompressed bitstream image in .bit
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format into FPGA's SRAM configuration memory.
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properties:
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compatible:
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enum:
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- lattice,sysconfig-ecp5
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reg:
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maxItems: 1
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program-gpios:
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description:
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A GPIO line connected to PROGRAMN (active low) pin of the device.
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Initiates configuration sequence.
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maxItems: 1
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init-gpios:
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description:
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A GPIO line connected to INITN (active low) pin of the device.
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Indicates that the FPGA is ready to be configured.
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maxItems: 1
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done-gpios:
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description:
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A GPIO line connected to DONE (active high) pin of the device.
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Indicates that the configuration sequence is complete.
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maxItems: 1
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required:
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- compatible
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- reg
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml
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- if:
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properties:
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compatible:
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contains:
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const: lattice,sysconfig-ecp5
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then:
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properties:
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spi-max-frequency:
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maximum: 60000000
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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fpga-mgr@0 {
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compatible = "lattice,sysconfig-ecp5";
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reg = <0>;
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spi-max-frequency = <20000000>;
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program-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
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init-gpios = <&gpio3 3 GPIO_ACTIVE_LOW>;
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done-gpios = <&gpio3 2 GPIO_ACTIVE_HIGH>;
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};
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};
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