Merge tag 'tegra-for-3.17-xusb-padctl' of...

Merge tag 'tegra-for-3.17-xusb-padctl' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/dt

Merge "ARM: tegra: Add XUSB pad controller support" from Thierry Reding:

Adds device tree bindings and a driver for the XUSB pad controller found
on Tegra114 and later. This is a prerequisites for PCIe, SATA and XUSB
drivers which are all currently being reviewed or pending for merge.

This is a separate branch in case it needs to be pulled into the pinctrl
tree to resolve conflicts.

* tag 'tegra-for-3.17-xusb-padctl' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  pinctrl: Add NVIDIA Tegra XUSB pad controller support
  of: Add NVIDIA Tegra XUSB pad controller binding
Signed-off-by: NOlof Johansson <olof@lixom.net>

Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-xusb-padctl.txt

+Device tree binding for NVIDIA Tegra XUSB pad controller
+========================================================
+
+The Tegra XUSB pad controller manages a set of lanes, each of which can be
+assigned to one out of a set of different pads. Some of these pads have an
+associated PHY that must be powered up before the pad can be used.
+
+This document defines the device-specific binding for the XUSB pad controller.
+
+Refer to pinctrl-bindings.txt in this directory for generic information about
+pin controller device tree bindings and ../phy/phy-bindings.txt for details on
+how to describe and reference PHYs in device trees.
+
+Required properties:
+--------------------
+- compatible: should be "nvidia,tegra124-xusb-padctl"
+- reg: Physical base address and length of the controller's registers.
+- resets: Must contain an entry for each entry in reset-names.
+  See ../reset/reset.txt for details.
+- reset-names: Must include the following entries:
+  - padctl
+- #phy-cells: Should be 1. The specifier is the index of the PHY to reference.
+  See <dt-bindings/pinctrl/pinctrl-tegra-xusb.h> for the list of valid values.
+
+Lane muxing:
+------------
+
+Child nodes contain the pinmux configurations following the conventions from
+the pinctrl-bindings.txt document. Typically a single, static configuration is
+given and applied at boot time.
+
+Each subnode describes groups of lanes along with parameters and pads that
+they should be assigned to. The name of these subnodes is not important. All
+subnodes should be parsed solely based on their content.
+
+Each subnode only applies the parameters that are explicitly listed. In other
+words, if a subnode that lists a function but no pin configuration parameters
+implies no information about any pin configuration parameters. Similarly, a
+subnode that describes only an IDDQ parameter implies no information about
+what function the pins are assigned to. For this reason even seemingly boolean
+values are actually tristates in this binding: unspecified, off or on.
+Unspecified is represented as an absent property, and off/on are represented
+as integer values 0 and 1.
+
+Required properties:
+- nvidia,lanes: An array of strings. Each string is the name of a lane.
+
+Optional properties:
+- nvidia,function: A string that is the name of the function (pad) that the
+  pin or group should be assigned to. Valid values for function names are
+  listed below.
+- nvidia,iddq: Enables IDDQ mode of the lane. (0: no, 1: yes)
+
+Note that not all of these properties are valid for all lanes. Lanes can be
+divided into three groups:
+
+  - otg-0, otg-1, otg-2:
+
+    Valid functions for this group are: "snps", "xusb", "uart", "rsvd".
+
+    The nvidia,iddq property does not apply to this group.
+
+  - ulpi-0, hsic-0, hsic-1:
+
+    Valid functions for this group are: "snps", "xusb".
+
+    The nvidia,iddq property does not apply to this group.
+
+  - pcie-0, pcie-1, pcie-2, pcie-3, pcie-4, sata-0:
+
+    Valid functions for this group are: "pcie", "usb3", "sata", "rsvd".
+
+
+Example:
+========
+
+SoC file extract:
+-----------------
+
+	padctl@0,7009f000 {
+		compatible = "nvidia,tegra124-xusb-padctl";
+		reg = <0x0 0x7009f000 0x0 0x1000>;
+		resets = <&tegra_car 142>;
+		reset-names = "padctl";
+
+		#phy-cells = <1>;
+	};
+
+Board file extract:
+-------------------
+
+	pcie-controller@0,01003000 {
+		...
+
+		phys = <&padctl 0>;
+		phy-names = "pcie";
+
+		...
+	};
+
+	...
+
+	padctl: padctl@0,7009f000 {
+		pinctrl-0 = <&padctl_default>;
+		pinctrl-names = "default";
+
+		padctl_default: pinmux {
+			usb3 {
+				nvidia,lanes = "pcie-0", "pcie-1";
+				nvidia,function = "usb3";
+				nvidia,iddq = <0>;
+			};
+
+			pcie {
+				nvidia,lanes = "pcie-2", "pcie-3",
+					       "pcie-4";
+				nvidia,function = "pcie";
+				nvidia,iddq = <0>;
+			};
+
+			sata {
+				nvidia,lanes = "sata-0";
+				nvidia,function = "sata";
+				nvidia,iddq = <0>;
+			};
+		};
+	};

drivers/pinctrl/Kconfig

@@ -328,6 +328,12 @@ config PINCTRL_TEGRA124
 	bool
 	select PINCTRL_TEGRA
 
+config PINCTRL_TEGRA_XUSB
+	def_bool y if ARCH_TEGRA
+	select GENERIC_PHY
+	select PINCONF
+	select PINMUX
+
 config PINCTRL_TZ1090
 	bool "Toumaz Xenif TZ1090 pin control driver"
 	depends on SOC_TZ1090

drivers/pinctrl/Makefile

@@ -55,6 +55,7 @@ obj-$(CONFIG_PINCTRL_TEGRA20)	+= pinctrl-tegra20.o
 obj-$(CONFIG_PINCTRL_TEGRA30)	+= pinctrl-tegra30.o
 obj-$(CONFIG_PINCTRL_TEGRA114)	+= pinctrl-tegra114.o
 obj-$(CONFIG_PINCTRL_TEGRA124)	+= pinctrl-tegra124.o
+obj-$(CONFIG_PINCTRL_TEGRA_XUSB)	+= pinctrl-tegra-xusb.o
 obj-$(CONFIG_PINCTRL_TZ1090)	+= pinctrl-tz1090.o
 obj-$(CONFIG_PINCTRL_TZ1090_PDC)	+= pinctrl-tz1090-pdc.o
 obj-$(CONFIG_PINCTRL_U300)	+= pinctrl-u300.o

include/dt-bindings/pinctrl/pinctrl-tegra-xusb.h

+#ifndef _DT_BINDINGS_PINCTRL_TEGRA_XUSB_H
+#define _DT_BINDINGS_PINCTRL_TEGRA_XUSB_H 1
+
+#define TEGRA_XUSB_PADCTL_PCIE 0
+#define TEGRA_XUSB_PADCTL_SATA 1
+
+#endif /* _DT_BINDINGS_PINCTRL_TEGRA_XUSB_H */