1 # SPDX-License-Identifier: (GPL-2.0-only OR BS
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/fpga/lattic
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: Lattice Slave SPI sysCONFIG FPGA manage
8
9 maintainers:
10 - Vladimir Georgiev <v.georgiev@metrotek.ru>
11
12 description: |
13 Lattice sysCONFIG port, which is used for FP
14 have Slave Serial Peripheral Interface. Only
15 supported.
16
17 Programming of ECP5 is done by writing uncom
18 format into FPGA's SRAM configuration memory
19
20 properties:
21 compatible:
22 enum:
23 - lattice,sysconfig-ecp5
24
25 reg:
26 maxItems: 1
27
28 program-gpios:
29 description:
30 A GPIO line connected to PROGRAMN (activ
31 Initiates configuration sequence.
32 maxItems: 1
33
34 init-gpios:
35 description:
36 A GPIO line connected to INITN (active l
37 Indicates that the FPGA is ready to be c
38 maxItems: 1
39
40 done-gpios:
41 description:
42 A GPIO line connected to DONE (active hi
43 Indicates that the configuration sequenc
44 maxItems: 1
45
46 required:
47 - compatible
48 - reg
49
50 allOf:
51 - $ref: /schemas/spi/spi-peripheral-props.ya
52
53 - if:
54 properties:
55 compatible:
56 contains:
57 const: lattice,sysconfig-ecp5
58 then:
59 properties:
60 spi-max-frequency:
61 maximum: 60000000
62
63 unevaluatedProperties: false
64
65 examples:
66 - |
67 #include <dt-bindings/gpio/gpio.h>
68
69 spi {
70 #address-cells = <1>;
71 #size-cells = <0>;
72
73 fpga-mgr@0 {
74 compatible = "lattice,sysconfig-ec
75 reg = <0>;
76 spi-max-frequency = <20000000>;
77 program-gpios = <&gpio3 4 GPIO_ACT
78 init-gpios = <&gpio3 3 GPIO_ACTIVE
79 done-gpios = <&gpio3 2 GPIO_ACTIVE
80 };
81 };
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