xref: /freebsd/sys/contrib/device-tree/Bindings/timer/qcom,msm-timer.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1*c66ec88fSEmmanuel Vadot* MSM Timer
2*c66ec88fSEmmanuel Vadot
3*c66ec88fSEmmanuel VadotProperties:
4*c66ec88fSEmmanuel Vadot
5*c66ec88fSEmmanuel Vadot- compatible : Should at least contain "qcom,msm-timer". More specific
6*c66ec88fSEmmanuel Vadot               properties specify which subsystem the timers are paired with.
7*c66ec88fSEmmanuel Vadot
8*c66ec88fSEmmanuel Vadot               "qcom,kpss-timer" - krait subsystem
9*c66ec88fSEmmanuel Vadot               "qcom,scss-timer" - scorpion subsystem
10*c66ec88fSEmmanuel Vadot
11*c66ec88fSEmmanuel Vadot- interrupts : Interrupts for the debug timer, the first general purpose
12*c66ec88fSEmmanuel Vadot               timer, and optionally a second general purpose timer, and
13*c66ec88fSEmmanuel Vadot               optionally as well, 2 watchdog interrupts, in that order.
14*c66ec88fSEmmanuel Vadot
15*c66ec88fSEmmanuel Vadot- reg : Specifies the base address of the timer registers.
16*c66ec88fSEmmanuel Vadot
17*c66ec88fSEmmanuel Vadot- clocks: Reference to the parent clocks, one per output clock. The parents
18*c66ec88fSEmmanuel Vadot          must appear in the same order as the clock names.
19*c66ec88fSEmmanuel Vadot
20*c66ec88fSEmmanuel Vadot- clock-names: The name of the clocks as free-form strings. They should be in
21*c66ec88fSEmmanuel Vadot               the same order as the clocks.
22*c66ec88fSEmmanuel Vadot
23*c66ec88fSEmmanuel Vadot- clock-frequency : The frequency of the debug timer and the general purpose
24*c66ec88fSEmmanuel Vadot                    timer(s) in Hz in that order.
25*c66ec88fSEmmanuel Vadot
26*c66ec88fSEmmanuel VadotOptional:
27*c66ec88fSEmmanuel Vadot
28*c66ec88fSEmmanuel Vadot- cpu-offset : per-cpu offset used when the timer is accessed without the
29*c66ec88fSEmmanuel Vadot               CPU remapping facilities. The offset is
30*c66ec88fSEmmanuel Vadot               cpu-offset + (0x10000 * cpu-nr).
31*c66ec88fSEmmanuel Vadot
32*c66ec88fSEmmanuel VadotExample:
33*c66ec88fSEmmanuel Vadot
34*c66ec88fSEmmanuel Vadot       timer@200a000 {
35*c66ec88fSEmmanuel Vadot               compatible = "qcom,scss-timer", "qcom,msm-timer";
36*c66ec88fSEmmanuel Vadot               interrupts = <1 1 0x301>,
37*c66ec88fSEmmanuel Vadot                            <1 2 0x301>,
38*c66ec88fSEmmanuel Vadot                            <1 3 0x301>,
39*c66ec88fSEmmanuel Vadot                            <1 4 0x301>,
40*c66ec88fSEmmanuel Vadot                            <1 5 0x301>;
41*c66ec88fSEmmanuel Vadot               reg = <0x0200a000 0x100>;
42*c66ec88fSEmmanuel Vadot               clock-frequency = <19200000>,
43*c66ec88fSEmmanuel Vadot                                 <32768>;
44*c66ec88fSEmmanuel Vadot               clocks = <&sleep_clk>;
45*c66ec88fSEmmanuel Vadot               clock-names = "sleep";
46*c66ec88fSEmmanuel Vadot               cpu-offset = <0x40000>;
47*c66ec88fSEmmanuel Vadot       };
48