1 # SPDX-License-Identifier: (GPL-2.0-only OR BS 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/timer/brcm, 4 $id: http://devicetree.org/schemas/timer/brcm,bcm2835-system-timer.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: BCM2835 System Timer 7 title: BCM2835 System Timer
8 8
9 maintainers: 9 maintainers:
10 - Stefan Wahren <wahrenst@gmx.net> 10 - Stefan Wahren <wahrenst@gmx.net>
11 - Raspberry Pi Kernel Maintenance <kernel-lis 11 - Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
12 12
13 description: 13 description:
14 The System Timer peripheral provides four 32 14 The System Timer peripheral provides four 32-bit timer channels and a
15 single 64-bit free running counter. Each cha 15 single 64-bit free running counter. Each channel has an output compare
16 register, which is compared against the 32 l 16 register, which is compared against the 32 least significant bits of the
17 free running counter values, and generates a 17 free running counter values, and generates an interrupt.
18 18
19 properties: 19 properties:
20 compatible: 20 compatible:
21 const: brcm,bcm2835-system-timer 21 const: brcm,bcm2835-system-timer
22 22
23 reg: 23 reg:
24 maxItems: 1 24 maxItems: 1
25 25
26 interrupts: 26 interrupts:
27 items: 27 items:
28 - description: System Timer Compare 0 ma 28 - description: System Timer Compare 0 match (used by VideoCore GPU)
29 - description: System Timer Compare 1 ma 29 - description: System Timer Compare 1 match (usable for ARM core)
30 - description: System Timer Compare 2 ma 30 - description: System Timer Compare 2 match (used by VideoCore GPU)
31 - description: System Timer Compare 3 ma 31 - description: System Timer Compare 3 match (usable for ARM core)
32 32
33 clock-frequency: true 33 clock-frequency: true
34 34
35 required: 35 required:
36 - compatible 36 - compatible
37 - reg 37 - reg
38 - interrupts 38 - interrupts
39 39
40 additionalProperties: false 40 additionalProperties: false
41 41
42 examples: 42 examples:
43 - | 43 - |
44 timer@7e003000 { 44 timer@7e003000 {
45 compatible = "brcm,bcm2835-system-timer" 45 compatible = "brcm,bcm2835-system-timer";
46 reg = <0x7e003000 0x1000>; 46 reg = <0x7e003000 0x1000>;
47 interrupts = <1 0>, <1 1>, <1 2>, <1 3>; 47 interrupts = <1 0>, <1 1>, <1 2>, <1 3>;
48 clock-frequency = <1000000>; 48 clock-frequency = <1000000>;
49 }; 49 };
50 ... 50 ...
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