81 lines
2.0 KiB
YAML
81 lines
2.0 KiB
YAML
|
# 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>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
...
|