new file mode 100644
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/fpga/lattice,sysconfig.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lattice Slave SPI sysCONFIG FPGA manager
+
+maintainers:
+ - Ivan Bornyakov <i.bornyakov@metrotek.ru>
+
+description: |
+ Lattice sysCONFIG port, which is used for FPGA configuration, among others,
+ have Slave Serial Peripheral Interface. Only full reconfiguration is
+ supported.
+
+ Programming of ECP5 is done by writing uncompressed bitstream image in .bit
+ format into FPGA's SRAM configuration memory.
+
+ Programming of MachXO2 is done by writing configuration data into device's
+ internal non-volatile Flash memory, then Self-Download of data from Flash
+ into SRAM is issued.
+
+properties:
+ compatible:
+ enum:
+ - lattice,ecp5-fpga-mgr
+ - lattice,machxo2-fpga-mgr
+
+ reg:
+ maxItems: 1
+
+ program-gpios:
+ description:
+ A GPIO line connected to PROGRAMN (active low) pin of the device.
+ Initiates configuration sequence.
+ maxItems: 1
+
+ init-gpios:
+ description:
+ A GPIO line connected to INITN (active low) pin of the device.
+ Indicates that the FPGA is ready to be configured.
+ maxItems: 1
+
+ done-gpios:
+ description:
+ A GPIO line connected to DONE (active high) pin of the device.
+ Indicates that the configuration sequence is complete.
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: lattice,machxo2-fpga-mgr
+ then:
+ properties:
+ spi-max-frequency:
+ maximum: 66000000
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: lattice,ecp5-fpga-mgr
+ then:
+ properties:
+ spi-max-frequency:
+ maximum: 60000000
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ fpga-mgr@0 {
+ compatible = "lattice,ecp5-fpga-mgr";
+ reg = <0>;
+ spi-max-frequency = <20000000>;
+ program-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
+ init-gpios = <&gpio3 3 GPIO_ACTIVE_LOW>;
+ done-gpios = <&gpio3 2 GPIO_ACTIVE_HIGH>;
+ };
+
+ fpga-mgr@1 {
+ compatible = "lattice,machxo2-fpga-mgr";
+ reg = <1>;
+ spi-max-frequency = <20000000>;
+ };
+ };
Add Device Tree Binding doc for configuring Lattice ECP5 and MachXO2 FPGAs over Slave SPI sysCONFIG interface. Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru> --- .../bindings/fpga/lattice,sysconfig.yaml | 102 ++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/lattice,sysconfig.yaml