On Sat, Nov 21, 2015 at 07:02:46PM +0000, Simon Arlott wrote: > Add device tree binding for the BCM6345 timer. This is required for the > BCM6345 watchdog which needs to respond to one of the timer interrupts. > > Signed-off-by: Simon Arlott <simon@xxxxxxxxxxx> One minor nit, otherwise: Acked-by: Rob Herring <robh@xxxxxxxxxx> > --- > .../bindings/timer/brcm,bcm6345-timer.txt | 57 ++++++++++++++++++++++ > 1 file changed, 57 insertions(+) > create mode 100644 Documentation/devicetree/bindings/timer/brcm,bcm6345-timer.txt > > diff --git a/Documentation/devicetree/bindings/timer/brcm,bcm6345-timer.txt b/Documentation/devicetree/bindings/timer/brcm,bcm6345-timer.txt > new file mode 100644 > index 0000000..2593907 > --- /dev/null > +++ b/Documentation/devicetree/bindings/timer/brcm,bcm6345-timer.txt > @@ -0,0 +1,57 @@ > +Broadcom BCM6345 Timer > + > +This block is a timer that is connected to one interrupt on the main interrupt > +controller and functions as a programmable interrupt controller for timer events. > + > +- 3 to 4 independent timers with their own maskable level interrupt bit (but not > + per CPU because there is only one parent interrupt and the timers share it) > + > +- 1 watchdog timer with an unmaskable level interrupt > + > +- Contains one enable/status word pair > + > +- No atomic set/clear operations > + > +The lack of per CPU ability of timers makes them unusable as a set of > +clockevent devices, otherwise they could be attached to the remaining > +interrupts. > + > +The BCM6318 also has a separate interrupt for every timer except the watchdog. > + > +Required properties: > + > +- compatible: should be "brcm,bcm<soc>-timer", "brcm,bcm6345-timer" > +- reg: specifies the base physical address and size of the registers, excluding > + the watchdog registers > +- interrupt-controller: identifies the node as an interrupt controller > +- #interrupt-cells: specifies the number of cells needed to encode an interrupt > + source, should be 1. > +- interrupt-parent: specifies the phandle to the parent interrupt controller(s) > + this one is cascaded from > +- interrupts: specifies the interrupt line(s) in the interrupt-parent controller > + node for the main timer interrupt, followed by the individual timer interrupts > + if present; valid values depend on the type of parent interrupt controller > + > +Example: > + > +timer: timer@0x10000080 { Drop the '0x' > + compatible = "brcm,bcm63168-timer", "brcm,bcm6345-timer"; > + reg = <0x10000080 0x1c>; > + > + interrupt-controller; > + #interrupt-cells = <1>; > + > + interrupt-parent = <&periph_intc>; > + interrupts = <0>; > +}; > + > +timer: timer@0x10000040 { Ditto. > + compatible = "brcm,bcm6318-timer", "brcm,bcm6345-timer"; > + reg = <0x10000040 0x28>; > + > + interrupt-controller; > + #interrupt-cells = <1>; > + > + interrupt-parent = <&periph_intc>; > + interrupts = <31>, <0>, <1>, <2>, <3>; > +}; > -- > 2.1.4 > > -- > Simon Arlott -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html