Merge tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty and serial driver updates from Greg KH:
 "Here's the large TTY and Serial driver update for 4.7-rc1.

  A few new serial drivers are added here, and Peter has fixed a bunch
  of long-standing bugs in the tty layer and serial drivers as normal.
  Full details in the shortlog.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (88 commits)
  MAINTAINERS: 8250: remove website reference
  serial: core: Fix port mutex assert if lockdep disabled
  serial: 8250_dw: fix wrong logic in dw8250_check_lcr()
  tty: vt, finish looping on duplicate
  tty: vt, return error when con_startup fails
  QE-UART: add "fsl,t1040-ucc-uart" to of_device_id
  serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios
  serial: 8250dw: Add device HID for future AMD UART controller
  Fix OpenSSH pty regression on close
  serial: mctrl_gpio: add IRQ locking
  serial: 8250: Integrate Fintek into 8250_base
  serial: mps2-uart: add support for early console
  serial: mps2-uart: add MPS2 UART driver
  dt-bindings: document the MPS2 UART bindings
  serial: sirf: Use generic uart-has-rtscts DT property
  serial: sirf: Introduce helper variable struct device_node *np
  serial: mxs-auart: Use generic uart-has-rtscts DT property
  serial: imx: Use generic uart-has-rtscts DT property
  doc: DT: Add Generic Serial Device Tree Bindings
  serial: 8250: of: Make tegra_serial_handle_break() static
  ...

1 files changed, 57 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/serial/serial.txt b/Documentation/devicetree/bindings/serial/serial.txt
new file mode 100644
index 000000000000..fd970f76a7b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/serial.txt
@@ -0,0 +1,57 @@
+Generic Serial DT Bindings
+
+This document lists a set of generic properties for describing UARTs in a
+device tree.  Whether these properties apply to a particular device depends on
+the DT bindings for the actual device.
+
+Optional properties:
+  - cts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
+    used as the UART's CTS line.
+  - dcd-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
+    used as the UART's DCD line.
+  - dsr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
+    used as the UART's DSR line.
+  - dtr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
+    used as the UART's DTR line.
+  - rng-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
+    used as the UART's RNG line.
+  - rts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
+    used as the UART's RTS line.
+
+  - uart-has-rtscts: The presence of this property indicates that the
+    UART has dedicated lines for RTS/CTS hardware flow control, and that
+    they are available for use (wired and enabled by pinmux configuration).
+    This depends on both the UART hardware and the board wiring.
+    Note that this property is mutually-exclusive with "cts-gpios" and
+    "rts-gpios" above.
+
+
+Examples:
+
+	uart1: serial@48022000 {
+		compatible = "ti,am3352-uart", "ti,omap3-uart";
+		ti,hwmods = "uart2";
+		clock-frequency = <48000000>;
+		reg = <0x48022000 0x2000>;
+		interrupts = <73>;
+		dmas = <&edma 28 0>, <&edma 29 0>;
+		dma-names = "tx", "rx";
+		dtr-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>;
+		dsr-gpios = <&gpio2 23 GPIO_ACTIVE_LOW>;
+		dcd-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
+		rng-gpios = <&gpio2 25 GPIO_ACTIVE_LOW>;
+		cts-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+		rts-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+		status = "okay";
+	};
+
+	scifa4: serial@e6c80000 {
+		compatible = "renesas,scifa-sh73a0", "renesas,scifa";
+		reg = <0xe6c80000 0x100>;
+		interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp2_clks SH73A0_CLK_SCIFA4>;
+		clock-names = "fck";
+		power-domains = <&pd_a3sp>;
+		uart-has-rtscts;
+		status = "okay";
+	};