Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 41 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/exynos5250-clock.txt b/Documentation/devicetree/bindings/clock/exynos5250-clock.txt
new file mode 100644
index 000000000..aff266a12
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/exynos5250-clock.txt
@@ -0,0 +1,41 @@
+* Samsung Exynos5250 Clock Controller
+
+The Exynos5250 clock controller generates and supplies clock to various
+controllers within the Exynos5250 SoC.
+
+Required Properties:
+
+- compatible: should be one of the following.
+  - "samsung,exynos5250-clock" - controller compatible with Exynos5250 SoC.
+
+- reg: physical base address of the controller and length of memory mapped
+  region.
+
+- #clock-cells: should be 1.
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume.
+
+All available clocks are defined as preprocessor macros in
+dt-bindings/clock/exynos5250.h header and can be used in device
+tree sources.
+
+Example 1: An example of a clock controller node is listed below.
+
+	clock: clock-controller@10010000 {
+		compatible = "samsung,exynos5250-clock";
+		reg = <0x10010000 0x30000>;
+		#clock-cells = <1>;
+	};
+
+Example 2: UART controller node that consumes the clock generated by the clock
+	   controller. Refer to the standard clock bindings for information
+	   about 'clocks' and 'clock-names' property.
+
+	serial@13820000 {
+		compatible = "samsung,exynos4210-uart";
+		reg = <0x13820000 0x100>;
+		interrupts = <0 54 0>;
+		clocks = <&clock CLK_UART2>, <&clock CLK_SCLK_UART2>;
+		clock-names = "uart", "clk_uart_baud0";
+	};