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dt-bindings: fpga: xilinx-spi: convert bindings to json-schema

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Convert xilinx-spi bindings to DT schema format using json-schema.

Signed-off-by: Nava kishore Manne <nava.kishore.manne@amd.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230227110213.291225-1-nava.kishore.manne@amd.com
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Nava kishore Manne 2023-02-27 16:32:13 +05:30 committed by Rob Herring
parent 7795c8d3c7
commit 9368eea6e7
2 changed files with 80 additions and 51 deletions
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51
Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt
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Xilinx Slave Serial SPI FPGA Manager
Xilinx Spartan-6 and 7 Series FPGAs support a method of loading the
bitstream over what is referred to as "slave serial" interface.
The slave serial link is not technically SPI, and might require extra
circuits in order to play nicely with other SPI slaves on the same bus.
See:
- https://www.xilinx.com/support/documentation/user_guides/ug380.pdf
- https://www.xilinx.com/support/documentation/user_guides/ug470_7Series_Config.pdf
- https://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf
Required properties:
- compatible: should contain "xlnx,fpga-slave-serial"
- reg: spi chip select of the FPGA
- prog_b-gpios: config pin (referred to as PROGRAM_B in the manual)
- done-gpios: config status pin (referred to as DONE in the manual)
Optional properties:
- init-b-gpios: initialization status and configuration error pin
(referred to as INIT_B in the manual)
Example for full FPGA configuration:
fpga-region0 {
compatible = "fpga-region";
fpga-mgr = <&fpga_mgr_spi>;
#address-cells = <0x1>;
#size-cells = <0x1>;
};
spi1: spi@10680 {
compatible = "marvell,armada-xp-spi", "marvell,orion-spi";
pinctrl-0 = <&spi0_pins>;
pinctrl-names = "default";
#address-cells = <1>;
#size-cells = <0>;
cell-index = <1>;
interrupts = <92>;
clocks = <&coreclk 0>;
fpga_mgr_spi: fpga-mgr@0 {
compatible = "xlnx,fpga-slave-serial";
spi-max-frequency = <60000000>;
spi-cpha;
reg = <0>;
prog_b-gpios = <&gpio0 29 GPIO_ACTIVE_LOW>;
init-b-gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
done-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
};
};

80
Documentation/devicetree/bindings/fpga/xlnx,fpga-slave-serial.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/fpga/xlnx,fpga-slave-serial.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Xilinx Slave Serial SPI FPGA
maintainers:
- Nava kishore Manne <nava.kishore.manne@amd.com>
description: |
Xilinx Spartan-6 and 7 Series FPGAs support a method of loading the bitstream
over what is referred to as slave serial interface.The slave serial link is
not technically SPI, and might require extra circuits in order to play nicely
with other SPI slaves on the same bus.
Datasheets:
https://www.xilinx.com/support/documentation/user_guides/ug380.pdf
https://www.xilinx.com/support/documentation/user_guides/ug470_7Series_Config.pdf
https://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
properties:
compatible:
enum:
- xlnx,fpga-slave-serial
spi-cpha: true
spi-max-frequency:
maximum: 60000000
reg:
maxItems: 1
prog_b-gpios:
description:
config pin (referred to as PROGRAM_B in the manual)
maxItems: 1
done-gpios:
description:
config status pin (referred to as DONE in the manual)
maxItems: 1
init-b-gpios:
description:
initialization status and configuration error pin
(referred to as INIT_B in the manual)
maxItems: 1
required:
- compatible
- reg
- prog_b-gpios
- done-gpios
- init-b-gpios
additionalProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
fpga_mgr_spi: fpga-mgr@0 {
compatible = "xlnx,fpga-slave-serial";
spi-max-frequency = <60000000>;
spi-cpha;
reg = <0>;
prog_b-gpios = <&gpio0 29 GPIO_ACTIVE_LOW>;
init-b-gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
done-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
};
};
...