xref: /OK3568_Linux_fs/kernel/Documentation/devicetree/bindings/timer/qcom,msm-timer.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981)
1*4882a593Smuzhiyun* MSM Timer
2*4882a593Smuzhiyun
3*4882a593SmuzhiyunProperties:
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun- compatible : Should at least contain "qcom,msm-timer". More specific
6*4882a593Smuzhiyun               properties specify which subsystem the timers are paired with.
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun               "qcom,kpss-timer" - krait subsystem
9*4882a593Smuzhiyun               "qcom,scss-timer" - scorpion subsystem
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun- interrupts : Interrupts for the debug timer, the first general purpose
12*4882a593Smuzhiyun               timer, and optionally a second general purpose timer, and
13*4882a593Smuzhiyun               optionally as well, 2 watchdog interrupts, in that order.
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun- reg : Specifies the base address of the timer registers.
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun- clocks: Reference to the parent clocks, one per output clock. The parents
18*4882a593Smuzhiyun          must appear in the same order as the clock names.
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun- clock-names: The name of the clocks as free-form strings. They should be in
21*4882a593Smuzhiyun               the same order as the clocks.
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun- clock-frequency : The frequency of the debug timer and the general purpose
24*4882a593Smuzhiyun                    timer(s) in Hz in that order.
25*4882a593Smuzhiyun
26*4882a593SmuzhiyunOptional:
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun- cpu-offset : per-cpu offset used when the timer is accessed without the
29*4882a593Smuzhiyun               CPU remapping facilities. The offset is
30*4882a593Smuzhiyun               cpu-offset + (0x10000 * cpu-nr).
31*4882a593Smuzhiyun
32*4882a593SmuzhiyunExample:
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun       timer@200a000 {
35*4882a593Smuzhiyun               compatible = "qcom,scss-timer", "qcom,msm-timer";
36*4882a593Smuzhiyun               interrupts = <1 1 0x301>,
37*4882a593Smuzhiyun                            <1 2 0x301>,
38*4882a593Smuzhiyun                            <1 3 0x301>,
39*4882a593Smuzhiyun                            <1 4 0x301>,
40*4882a593Smuzhiyun                            <1 5 0x301>;
41*4882a593Smuzhiyun               reg = <0x0200a000 0x100>;
42*4882a593Smuzhiyun               clock-frequency = <19200000>,
43*4882a593Smuzhiyun                                 <32768>;
44*4882a593Smuzhiyun               clocks = <&sleep_clk>;
45*4882a593Smuzhiyun               clock-names = "sleep";
46*4882a593Smuzhiyun               cpu-offset = <0x40000>;
47*4882a593Smuzhiyun       };
48