Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/rtc/dw-apb.txt b/Documentation/devicetree/bindings/rtc/dw-apb.txt
new file mode 100644
index 000000000..c703d51ab
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/dw-apb.txt
@@ -0,0 +1,32 @@
+* Designware APB timer
+
+Required properties:
+- compatible: One of:
+ 	"snps,dw-apb-timer"
+	"snps,dw-apb-timer-sp" <DEPRECATED>
+	"snps,dw-apb-timer-osc" <DEPRECATED>
+- reg: physical base address of the controller and length of memory mapped
+  region.
+- interrupts: IRQ line for the timer.
+- either clocks+clock-names or clock-frequency properties
+
+Optional properties:
+- clocks	: list of clock specifiers, corresponding to entries in
+		  the clock-names property;
+- clock-names	: should contain "timer" and "pclk" entries, matching entries
+		  in the clocks property.
+- clock-frequency: The frequency in HZ of the timer.
+- clock-freq: For backwards compatibility with picoxcell
+
+If using the clock specifiers, the pclk clock is optional, as not all
+systems may use one.
+
+
+Example:
+	timer@ffe00000 {
+		compatible = "snps,dw-apb-timer";
+		interrupts = <0 170 4>;
+		reg = <0xffe00000 0x1000>;
+		clocks = <&timer_clk>, <&timer_pclk>;
+		clock-names = "timer", "pclk";
+	};