tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/serial/snps-dw-apb-uart.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Synopsys DesignWare ABP UART
8
9maintainers:
10 - Rob Herring <robh@kernel.org>
11
12allOf:
13 - $ref: /schemas/serial.yaml#
14
15properties:
16 compatible:
17 oneOf:
18 - items:
19 - enum:
20 - renesas,r9a06g032-uart
21 - renesas,r9a06g033-uart
22 - const: renesas,rzn1-uart
23 - items:
24 - enum:
25 - rockchip,px30-uart
26 - rockchip,rk3036-uart
27 - rockchip,rk3066-uart
28 - rockchip,rk3188-uart
29 - rockchip,rk3288-uart
30 - rockchip,rk3328-uart
31 - rockchip,rk3368-uart
32 - rockchip,rk3399-uart
33 - rockchip,rv1108-uart
34 - const: snps,dw-apb-uart
35 - items:
36 - enum:
37 - brcm,bcm11351-dw-apb-uart
38 - brcm,bcm21664-dw-apb-uart
39 - const: snps,dw-apb-uart
40 - const: snps,dw-apb-uart
41
42 reg:
43 maxItems: 1
44
45 interrupts:
46 maxItems: 1
47
48 clock-frequency: true
49
50 clocks:
51 minItems: 1
52 maxItems: 2
53
54 clock-names:
55 items:
56 - const: baudclk
57 - const: apb_pclk
58
59 snps,uart-16550-compatible:
60 description: reflects the value of UART_16550_COMPATIBLE configuration
61 parameter. Define this if your UART does not implement the busy functionality.
62 type: boolean
63
64 resets:
65 maxItems: 1
66
67 reg-shift: true
68
69 reg-io-width: true
70
71 dcd-override:
72 description: Override the DCD modem status signal. This signal will
73 always be reported as active instead of being obtained from the modem
74 status register. Define this if your serial port does not use this
75 pin.
76 type: boolean
77
78 dsr-override:
79 description: Override the DTS modem status signal. This signal will
80 always be reported as active instead of being obtained from the modem
81 status register. Define this if your serial port does not use this
82 pin.
83 type: boolean
84
85 cts-override:
86 description: Override the CTS modem status signal. This signal will
87 always be reported as active instead of being obtained from the modem
88 status register. Define this if your serial port does not use this
89 pin.
90 type: boolean
91
92 ri-override:
93 description: Override the RI modem status signal. This signal will always
94 be reported as inactive instead of being obtained from the modem status
95 register. Define this if your serial port does not use this pin.
96 type: boolean
97
98required:
99 - compatible
100 - reg
101 - interrupts
102
103examples:
104 - |
105 serial@80230000 {
106 compatible = "snps,dw-apb-uart";
107 reg = <0x80230000 0x100>;
108 clock-frequency = <3686400>;
109 interrupts = <10>;
110 reg-shift = <2>;
111 reg-io-width = <4>;
112 dcd-override;
113 dsr-override;
114 cts-override;
115 ri-override;
116 };
117
118 - |
119 // Example with one clock:
120 serial@80230000 {
121 compatible = "snps,dw-apb-uart";
122 reg = <0x80230000 0x100>;
123 clocks = <&baudclk>;
124 interrupts = <10>;
125 reg-shift = <2>;
126 reg-io-width = <4>;
127 };
128
129 - |
130 // Example with two clocks:
131 serial@80230000 {
132 compatible = "snps,dw-apb-uart";
133 reg = <0x80230000 0x100>;
134 clocks = <&baudclk>, <&apb_pclk>;
135 clock-names = "baudclk", "apb_pclk";
136 interrupts = <10>;
137 reg-shift = <2>;
138 reg-io-width = <4>;
139 };
140...