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/watchdog/arm,sp805.txt b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt
new file mode 100644
index 000000000..bee6f1f0e
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+++ b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt
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+ARM AMBA Primecell SP805 Watchdog
+
+SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
+can be used to identify the peripheral type, vendor, and revision.
+This value can be used for driver matching.
+
+As SP805 WDT is a primecell IP, it follows the base bindings specified in
+'arm/primecell.txt'
+
+Required properties:
+- compatible:  Should be "arm,sp805" & "arm,primecell"
+- reg:         Should contain location and length for watchdog timer register
+- clocks:      Clocks driving the watchdog timer hardware. This list should be
+               2 clocks. With 2 clocks, the order is wdog_clk, apb_pclk
+               wdog_clk can be equal to or be a sub-multiple of the apb_pclk
+               frequency
+- clock-names: Shall be "wdog_clk" for first clock and "apb_pclk" for the
+               second one
+
+Optional properties:
+- interrupts:  Should specify WDT interrupt number
+- timeout-sec: Should specify default WDT timeout in seconds. If unset, the
+               default timeout is determined by the driver
+
+Example:
+	watchdog@66090000 {
+		compatible = "arm,sp805", "arm,primecell";
+		reg = <0x66090000 0x1000>;
+		interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&wdt_clk>, <&apb_pclk>;
+		clock-names = "wdog_clk", "apb_pclk";
+	};