The patch describes how to setup rockchip timers in device tree so they can be used as clocksource.
I'm going to implement this feature. Signed-off-by: Alexander Kochetkov <[email protected]> --- .../bindings/timer/rockchip,rk-timer.txt | 35 +++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt index 7bc9691..15f8fed 100644 --- a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt +++ b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt @@ -16,7 +16,18 @@ Required properties: - clock-names : must include the following entries: "timer", "pclk" -Example: +Note: +If device tree contain only one timer, than the timer will be intialized +as clockevent provider. If device tree contain two timers, than first timer +will be initialized as clockevent provider and second one as clocksource. + +If you want to bind specific timer as clockevent (i.e. one from alive subsystem) +and specific timer as clocksource, you can number the timers in "aliases" node. + +If device tree contain only one timer and the timer is named as timer1 in +"aliases" node, then the timer will be initialized as clocksource. + +Example (clockevent only): timer: timer@ff810000 { compatible = "rockchip,rk3288-timer"; reg = <0xff810000 0x20>; @@ -24,3 +35,25 @@ Example: clocks = <&xin24m>, <&cru PCLK_TIMER>; clock-names = "timer", "pclk"; }; + +Example (clockevent and clocksource with explicit numbering): + aliases { + timer0 = &timer6; + timer1 = &timer5; + }; + + timer5: timer@20038080 { + compatible = "rockchip,rk3188-timer", "rockchip,rk3288-timer"; + reg = <0x20038080 0x20>; + interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&cru SCLK_TIMER5>, <&cru PCLK_TIMER0>; + clock-names = "timer", "pclk"; + }; + + timer6: timer@200380A0 { + compatible = ""rockchip,rk3188-timer", rockchip,rk3288-timer"; + reg = <0x200380A0 0x20>; + interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&cru SCLK_TIMER6>, <&cru PCLK_TIMER0>; + clock-names = "timer", "pclk"; + }; -- 1.7.9.5
