clocksource: Add Marvell Orion SoC timer

This patch add a DT enabled driver for timers found on Marvell Orion SoCs
(Kirkwood, Dove, Orion5x, and Discovery Innovation). It installs a free-
running clocksource on timer0 and a clockevent source on timer1.
Corresponding device tree documentation is also added.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>

1 files changed, 17 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/timer/marvell,orion-timer.txt b/Documentation/devicetree/bindings/timer/marvell,orion-timer.txt
new file mode 100644
index 000000000000..62bb8260cf6a
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/marvell,orion-timer.txt
@@ -0,0 +1,17 @@
+Marvell Orion SoC timer
+
+Required properties:
+- compatible: shall be "marvell,orion-timer"
+- reg: base address of the timer register starting with TIMERS CONTROL register
+- interrupt-parent: phandle of the bridge interrupt controller
+- interrupts: should contain the interrupts for Timer0 and Timer1
+- clocks: phandle of timer reference clock (tclk)
+
+Example:
+        timer: timer {
+                compatible = "marvell,orion-timer";
+                reg = <0x20300 0x20>;
+                interrupt-parent = <&bridge_intc>;
+                interrupts = <1>, <2>;
+                clocks = <&core_clk 0>;
+        };