On Tue, Mar 08, 2016 at 05:56:05PM +0530, Vineet Gupta wrote:
> ARC Timers have historically been probed directly.
> As precursor to start probing Timers thru DT introduce these bindings
> Note that to keep series bisectable, these bindings are not yet used in
> code.
>
> Cc: Daniel Lezcano <daniel.lezcano at linaro.org>
> Cc: Rob Herring <robh at kernel.org>
> Cc: devicetree at vger.kernel.org
> Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
> ---
> Changes v1 -> v2
> - snps,arc-timer[0-1] folded into single snps-arc-timer [Rob]
> - Node name in DT example fixed: [Rob]
> "timer1: timer_clksrc {" -> timer at 1 {
> - Introduced 64bit RTC in skeleton_hs.dtsi [Vineet]
>
> v1:
> - http://lists.infradead.org/pipermail/linux-snps-arc/2016-February/000447.html
>
> Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
> ---
> .../devicetree/bindings/timer/snps,arc-timer.txt | 26 ++++++++++++++++++++++
> .../devicetree/bindings/timer/snps,archs-gfrc.txt | 14 ++++++++++++
> .../devicetree/bindings/timer/snps,archs-rtc.txt | 14 ++++++++++++
> arch/arc/boot/dts/abilis_tb10x.dtsi | 14 ++++++++++++
> arch/arc/boot/dts/skeleton.dtsi | 14 ++++++++++++
> arch/arc/boot/dts/skeleton_hs.dtsi | 20 +++++++++++++++++
> arch/arc/boot/dts/skeleton_hs_idu.dtsi | 14 ++++++++++++
> 7 files changed, 116 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/timer/snps,arc-timer.txt
> create mode 100644 Documentation/devicetree/bindings/timer/snps,archs-gfrc.txt
> create mode 100644 Documentation/devicetree/bindings/timer/snps,archs-rtc.txt
>
> diff --git a/Documentation/devicetree/bindings/timer/snps,arc-timer.txt b/Documentation/devicetree/bindings/timer/snps,arc-timer.txt
> new file mode 100644
> index 000000000000..9e02be24e805
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/snps,arc-timer.txt
> @@ -0,0 +1,26 @@
> +Synopsys ARC Local Timer with Interrupt Capabilities
> +- Found on all ARC CPUs (ARC700/ARCHS)
> +- Can be optionally programmed to interrupt on Limit
> +- Two idential copies TIMER0 and TIMER1 exist in ARC cores and historically
> + TIMER0 used as clockevent provider (true for all ARC cores)
> + TIMER1 used for clocksource (mandatory for ARC700, optional for ARC HS)
> +
> +Required properties:
> +
> +- compatible : should be "snps,arc-timer"
> +- interrupts : single Interrupt going into parent intc
> + (16 for ARCHS cores, 3 for ARC700 cores)
> +- clocks : phandle to the source clock
> +
> +Optional properties:
> +
> +- interrupt-parent : phandle to parent intc
> +
> +Example:
> +
> + timer at 0 {
Use of unit addresses without reg property is going to start generating
warnings. I would just use "timer0" in this case.
> + compatible = "snps,arc-timer0";
s/timer0/timer/
> + interrupts = <3>;
> + interrupt-parent = <&core_intc>;
> + clocks = <&core_clk>;
> + };
> diff --git a/Documentation/devicetree/bindings/timer/snps,archs-gfrc.txt b/Documentation/devicetree/bindings/timer/snps,archs-gfrc.txt
> new file mode 100644
> index 000000000000..aaab100f54e7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/snps,archs-gfrc.txt
> @@ -0,0 +1,14 @@
> +Synopsys ARC Free Running 64-bit Global Timer for ARC HS CPUs
> +- clocksource provider for SMP SoC
> +
> +Required properties:
> +
> +- compatible : should be "snps,archs-gfrc"
> +- clocks : phandle to the source clock
> +
> +Example:
> +
> + timer at 1 {
> + compatible = "snps,archs-gfrc";
> + clocks = <&core_clk>;
> + };
> diff --git a/Documentation/devicetree/bindings/timer/snps,archs-rtc.txt b/Documentation/devicetree/bindings/timer/snps,archs-rtc.txt
> new file mode 100644
> index 000000000000..13f756fa1d6d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/snps,archs-rtc.txt
> @@ -0,0 +1,14 @@
> +Synopsys ARC Free Running 64-bit Local Timer for ARC HS CPUs
> +- clocksource provider for UP SoC
> +
> +Required properties:
> +
> +- compatible : should be "snps,archs-rtc"
> +- clocks : phandle to the source clock
> +
> +Example:
> +
> + timer at 1 {
rtc {
And then similar updates in the dts files.
> + compatible = "snps,arc-rtc";
> + clocks = <&core_clk>;
> + };
