1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/spi/spi-fsl-lpspi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Freescale Low Power SPI (LPSPI) for i.MX
8
9 maintainers:
10 - Shawn Guo <shawnguo@kernel.org>
11 - Sascha Hauer <s.hauer@pengutronix.de>
12 - Fabio Estevam <festevam@gmail.com>
13
14 allOf:
15 - $ref: /schemas/spi/spi-controller.yaml#
16
17 properties:
18 compatible:
19 oneOf:
20 - enum:
21 - fsl,imx7ulp-spi
22 - fsl,imx8qxp-spi
23 - items:
24 - enum:
25 - fsl,imx8ulp-spi
26 - fsl,imx93-spi
27 - fsl,imx95-spi
28 - const: fsl,imx7ulp-spi
29 reg:
30 maxItems: 1
31
32 interrupts:
33 maxItems: 1
34
35 clocks:
36 items:
37 - description: SoC SPI per clock
38 - description: SoC SPI ipg clock
39
40 clock-names:
41 items:
42 - const: per
43 - const: ipg
44
45 dmas:
46 items:
47 - description: TX DMA Channel
48 - description: RX DMA Channel
49
50 dma-names:
51 items:
52 - const: tx
53 - const: rx
54
55 fsl,spi-only-use-cs1-sel:
56 description:
57 spi common code does not support use of CS signals discontinuously.
58 i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
59 this property to re-config the chipselect value in the LPSPI driver.
60 type: boolean
61
62 num-cs:
63 description:
64 number of chip selects.
65 minimum: 1
66 maximum: 2
67 default: 1
68
69 power-domains:
70 maxItems: 1
71
72 required:
73 - compatible
74 - reg
75 - interrupts
76 - clocks
77 - clock-names
78
79 unevaluatedProperties: false
80
81 examples:
82 - |
83 #include <dt-bindings/clock/imx7ulp-clock.h>
84 #include <dt-bindings/interrupt-controller/arm-gic.h>
85
86 spi@40290000 {
87 compatible = "fsl,imx7ulp-spi";
88 reg = <0x40290000 0x10000>;
89 interrupt-parent = <&intc>;
90 interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
91 clocks = <&clks IMX7ULP_CLK_LPSPI2>,
92 <&clks IMX7ULP_CLK_DUMMY>;
93 clock-names = "per", "ipg";
94 spi-slave;
95 fsl,spi-only-use-cs1-sel;
96 num-cs = <2>;
97 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.