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authorVineet Gupta <vgupta@synopsys.com>2016-01-01 18:48:40 +0530
committerVineet Gupta <vgupta@synopsys.com>2016-05-09 09:32:29 +0530
commit7ec9f34a03e4a08469cca206ff5324f6b99fdc3f (patch)
tree4ba97a85326dbb9e93a95806ca90c543ec82b020 /Documentation/devicetree/bindings/timer
parentb3d6aba8bd92c20b7748ccd82b6fab8ea5081066 (diff)
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ARC: [dts] Introduce Timer bindings
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@linaro.org> Cc: devicetree@vger.kernel.org Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'Documentation/devicetree/bindings/timer')
-rw-r--r--Documentation/devicetree/bindings/timer/snps,arc-timer.txt31
-rw-r--r--Documentation/devicetree/bindings/timer/snps,archs-gfrc.txt14
-rw-r--r--Documentation/devicetree/bindings/timer/snps,archs-rtc.txt14
3 files changed, 59 insertions, 0 deletions
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..4ef024630d61
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/snps,arc-timer.txt
@@ -0,0 +1,31 @@
+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:
+
+ timer0 {
+ compatible = "snps,arc-timer";
+ interrupts = <3>;
+ interrupt-parent = <&core_intc>;
+ clocks = <&core_clk>;
+ };
+
+ timer1 {
+ compatible = "snps,arc-timer";
+ 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..b6cd1b3922de
--- /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:
+
+ gfrc {
+ 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..47bd7a702f3f
--- /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:
+
+ rtc {
+ compatible = "snps,arc-rtc";
+ clocks = <&core_clk>;
+ };
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