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$id: http://devicetree.org/schemas/serial/samsung_uart.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung S3C, S5P and Exynos SoC UART Controller
8
9maintainers:
10 - Krzysztof Kozlowski <krzk@kernel.org>
11 - Greg Kroah-Hartman <gregkh@linuxfoundation.org>
12
13description: |+
14 Each Samsung UART should have an alias correctly numbered in the "aliases"
15 node, according to serialN format, where N is the port number (non-negative
16 decimal integer) as specified by User's Manual of respective SoC.
17
18properties:
19 compatible:
20 items:
21 - enum:
22 - samsung,s3c2410-uart
23 - samsung,s3c2412-uart
24 - samsung,s3c2440-uart
25 - samsung,s3c6400-uart
26 - samsung,s5pv210-uart
27 - samsung,exynos4210-uart
28
29 reg:
30 maxItems: 1
31
32 clocks:
33 minItems: 2
34 maxItems: 5
35
36 clock-names:
37 description: N = 0 is allowed for SoCs without internal baud clock mux.
38 minItems: 2
39 maxItems: 5
40 items:
41 - const: uart
42 - pattern: '^clk_uart_baud[0-3]$'
43 - pattern: '^clk_uart_baud[0-3]$'
44 - pattern: '^clk_uart_baud[0-3]$'
45 - pattern: '^clk_uart_baud[0-3]$'
46
47 interrupts:
48 description: RX interrupt and optionally TX interrupt.
49 minItems: 1
50 maxItems: 2
51
52 samsung,uart-fifosize:
53 description: The fifo size supported by the UART channel.
54 allOf:
55 - $ref: /schemas/types.yaml#/definitions/uint32
56 - enum: [16, 64, 256]
57
58required:
59 - compatible
60 - clocks
61 - clock-names
62 - interrupts
63 - reg
64
65allOf:
66 - if:
67 properties:
68 compatible:
69 contains:
70 enum:
71 - samsung,s3c2410-uart
72 - samsung,s5pv210-uart
73 then:
74 properties:
75 clocks:
76 minItems: 2
77 maxItems: 3
78 clock-names:
79 minItems: 2
80 maxItems: 3
81 items:
82 - const: uart
83 - pattern: '^clk_uart_baud[0-1]$'
84 - pattern: '^clk_uart_baud[0-1]$'
85
86 - if:
87 properties:
88 compatible:
89 contains:
90 enum:
91 - samsung,exynos4210-uart
92 then:
93 properties:
94 clocks:
95 minItems: 2
96 maxItems: 2
97 clock-names:
98 minItems: 2
99 maxItems: 2
100 items:
101 - const: uart
102 - const: clk_uart_baud0
103
104examples:
105 - |
106 #include <dt-bindings/clock/samsung,s3c64xx-clock.h>
107
108 uart0: serial@7f005000 {
109 compatible = "samsung,s3c6400-uart";
110 reg = <0x7f005000 0x100>;
111 interrupt-parent = <&vic1>;
112 interrupts = <5>;
113 clock-names = "uart", "clk_uart_baud2",
114 "clk_uart_baud3";
115 clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>,
116 <&clocks SCLK_UART>;
117 samsung,uart-fifosize = <16>;
118 };