Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / serial / qcom,msm-uartdm.txt

diff --git a/kernel/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt b/kernel/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
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+* MSM Serial UARTDM
+
+The MSM serial UARTDM hardware is designed for high-speed use cases where the
+transmit and/or receive channels can be offloaded to a dma-engine. From a
+software perspective it's mostly compatible with the MSM serial UART except
+that it supports reading and writing multiple characters at a time.
+
+Required properties:
+- compatible: Should contain at least "qcom,msm-uartdm".
+              A more specific property should be specified as follows depending
+             on the version:
+               "qcom,msm-uartdm-v1.1"
+               "qcom,msm-uartdm-v1.2"
+               "qcom,msm-uartdm-v1.3"
+               "qcom,msm-uartdm-v1.4"
+- reg: Should contain UART register locations and lengths. The first
+       register shall specify the main control registers. An optional second
+       register location shall specify the GSBI control region.
+       "qcom,msm-uartdm-v1.3" is the only compatible value that might
+       need the GSBI control region.
+- interrupts: Should contain UART interrupt.
+- clocks: Should contain the core clock and the AHB clock.
+- clock-names: Should be "core" for the core clock and "iface" for the
+              AHB clock.
+
+Optional properties:
+- dmas: Should contain dma specifiers for transmit and receive channels
+- dma-names: Should contain "tx" for transmit and "rx" for receive channels
+
+Note: Aliases may be defined to ensure the correct ordering of the UARTs.
+The alias serialN will result in the UART being assigned port N.  If any
+serialN alias exists, then an alias must exist for each enabled UART.  The
+serialN aliases should be in a .dts file instead of in a .dtsi file.
+
+Examples:
+
+- A uartdm v1.4 device with dma capabilities.
+
+       serial@f991e000 {
+               compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
+               reg = <0xf991e000 0x1000>;
+               interrupts = <0 108 0x0>;
+               clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>;
+               clock-names = "core", "iface";
+               dmas = <&dma0 0>, <&dma0 1>;
+               dma-names = "tx", "rx";
+       };
+
+- A uartdm v1.3 device without dma capabilities and part of a GSBI complex.
+
+       serial@19c40000 {
+               compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm";
+               reg = <0x19c40000 0x1000>,
+               <0x19c00000 0x1000>;
+               interrupts = <0 195 0x0>;
+               clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>;
+               clock-names = "core", "iface";
+       };
+
+- serialN alias.
+
+       aliases {
+               serial0 = &uarta;
+               serial1 = &uartc;
+               serial2 = &uartb;
+       };
+
+       uarta: serial@12490000 {
+               status = "ok";
+       };
+
+       uartb: serial@16340000 {
+               status = "ok";
+       };
+
+       uartc: serial@1a240000 {
+               status = "ok";
+       };