nfs: disintegrate UAPI for nfs

This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently.  After these patches, userspace
headers will be segregated into:

        include/uapi/linux/.../foo.h

for the userspace interface stuff, and:

        include/linux/.../foo.h

for the strictly kernel internal stuff.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/mdio-mux-mmioreg.txt b/Documentation/devicetree/bindings/net/mdio-mux-mmioreg.txt
new file mode 100644
index 000000000000..8516929c7251
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/mdio-mux-mmioreg.txt
@@ -0,0 +1,75 @@
+Properties for an MDIO bus multiplexer controlled by a memory-mapped device
+
+This is a special case of a MDIO bus multiplexer.  A memory-mapped device,
+like an FPGA, is used to control which child bus is connected.  The mdio-mux
+node must be a child of the memory-mapped device.  The driver currently only
+supports devices with eight-bit registers.
+
+Required properties in addition to the generic multiplexer properties:
+
+- compatible : string, must contain "mdio-mux-mmioreg"
+
+- reg : integer, contains the offset of the register that controls the bus
+	multiplexer.  The size field in the 'reg' property is the size of
+	register, and must therefore be 1.
+
+- mux-mask : integer, contains an eight-bit mask that specifies which
+	bits in the register control the actual bus multiplexer.  The
+	'reg' property of each child mdio-mux node must be constrained by
+	this mask.
+
+Example:
+
+The FPGA node defines a memory-mapped FPGA with a register space of 0x30 bytes.
+For the "EMI2" MDIO bus, register 9 (BRDCFG1) controls the mux on that bus.
+A bitmask of 0x6 means that bits 1 and 2 (bit 0 is lsb) are the bits on
+BRDCFG1 that control the actual mux.
+
+	/* The FPGA node */
+	fpga: board-control@3,0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "fsl,p5020ds-fpga", "fsl,fpga-ngpixis";
+		reg = <3 0 0x30>;
+		ranges = <0 3 0 0x30>;
+
+		mdio-mux-emi2 {
+			compatible = "mdio-mux-mmioreg", "mdio-mux";
+			mdio-parent-bus = <&xmdio0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <9 1>; // BRDCFG1
+			mux-mask = <0x6>; // EMI2
+
+			emi2_slot1: mdio@0 {	// Slot 1 XAUI (FM2)
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				phy_xgmii_slot1: ethernet-phy@0 {
+					compatible = "ethernet-phy-ieee802.3-c45";
+					reg = <4>;
+				};
+			};
+
+			emi2_slot2: mdio@2 {	// Slot 2 XAUI (FM1)
+				reg = <2>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				phy_xgmii_slot2: ethernet-phy@4 {
+					compatible = "ethernet-phy-ieee802.3-c45";
+					reg = <0>;
+				};
+			};
+		};
+	};
+
+	/* The parent MDIO bus. */
+	xmdio0: mdio@f1000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "fsl,fman-xmdio";
+		reg = <0xf1000 0x1000>;
+		interrupts = <100 1 0 0>;
+	};