Commit 8c7febe8 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'tty-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 

Pull tty/serial driver updates from Greg KH:
 "Here's the tty and serial driver patches for 4.2-rc1.

  A number of individual driver updates, some code cleanups, and other
  minor things, full details in the shortlog.

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

* tag 'tty-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (152 commits)
  Doc: serial-rs485.txt: update RS485 driver interface
  Doc: tty.txt: remove mention of the BKL
  MAINTAINERS: tty: add serial docs directory
  serial: sprd: check for NULL after calling devm_clk_get
  serial: 8250_pci: Correct uartclk for xr17v35x expansion chips
  serial: 8250_pci: Add support for 12 port Exar boards
  serial: 8250_uniphier: add bindings document for UniPhier UART
  serial: core: cleanup in uart_get_baud_rate()
  serial: stm32-usart: Add STM32 USART Driver
  tty/serial: kill off set_irq_flags usage
  tty: move linux/gsmmux.h to uapi
  doc: dt: add documentation for nxp,lpc1850-uart
  serial: 8250: add LPC18xx/43xx UART driver
  serial: 8250_uniphier: add UniPhier serial driver
  serial: 8250_dw: support ACPI platforms with integrated DMA engine
  serial: of_serial: check the return value of clk_prepare_enable()
  serial: of_serial: use devm_clk_get() instead of clk_get()
  serial: earlycon: Add support for big-endian MMIO accesses
  serial: sirf: use hrtimer for data rx
  serial: sirf: correct the fifo empty_bit
  ...
parents 23908db4 71206b9f

Documentation/devicetree/bindings/serial/arm_sbsa_uart.txt

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+10 −0
Original line number Diff line number Diff line 
* ARM SBSA defined generic UART

This UART uses a subset of the PL011 registers and consequently lives

in the PL011 driver. It's baudrate and other communication parameters

cannot be adjusted at runtime, so it lacks a clock specifier here.



Required properties:

- compatible: must be "arm,sbsa-uart"

- reg: exactly one register range

- interrupts: exactly one interrupt specifier

- current-speed: the (fixed) baud rate set by the firmware

Documentation/devicetree/bindings/serial/mtk-uart.txt

+10 −2
Original line number Diff line number Diff line
@@ -14,7 +14,14 @@ Required properties: 


- interrupts: A single interrupt specifier.



- clocks: Clock driving the hardware.

- clocks : Must contain an entry for each entry in clock-names.

  See ../clocks/clock-bindings.txt for details.

- clock-names:

  - "baud": The clock the baudrate is derived from

  - "bus": The bus clock for register accesses (optional)



For compatibility with older device trees an unnamed clock is used for the

baud clock if the baudclk does not exist. Do not use this for new designs.



Example:
@@ -22,5 +29,6 @@ Example: 
		compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";

		reg = <0x11006000 0x400>;

		interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>;

		clocks = <&uart_clk>;

		clocks = <&uart_clk>, <&bus_clk>;

		clock-names = "baud", "bus";

	};

Documentation/devicetree/bindings/serial/nxp,lpc1850-uart.txt

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+28 −0
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* NXP LPC1850 UART



Required properties:

- compatible	: "nxp,lpc1850-uart", "ns16550a".

- reg		: offset and length of the register set for the device.

- interrupts	: should contain uart interrupt.

- clocks	: phandle to the input clocks.

- clock-names	: required elements: "uartclk", "reg".



Optional properties:

- dmas		: Two or more DMA channel specifiers following the

		  convention outlined in bindings/dma/dma.txt

- dma-names	: Names for the dma channels, if present. There must

		  be at least one channel named "tx" for transmit

		  and named "rx" for receive.



Since it's also possible to also use the of_serial.c driver all

parameters from 8250.txt also apply but are optional.



Example:

uart0: serial@40081000 {

	compatible = "nxp,lpc1850-uart", "ns16550a";

	reg = <0x40081000 0x1000>;

	reg-shift = <2>;

	interrupts = <24>;

	clocks = <&ccu2 CLK_APB0_UART0>, <&ccu1 CLK_CPU_UART0>;

	clock-names = "uartclk", "reg";

};

Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt

+37 −0
Original line number Diff line number Diff line 
* NXP SC16IS7xx advanced Universal Asynchronous Receiver-Transmitter (UART)

* i2c as bus



Required properties:

- compatible: Should be one of the following:
@@ -31,3 +32,39 @@ Example: 
                gpio-controller;

                #gpio-cells = <2>;

        };



* spi as bus



Required properties:

- compatible: Should be one of the following:

  - "nxp,sc16is740" for NXP SC16IS740,

  - "nxp,sc16is741" for NXP SC16IS741,

  - "nxp,sc16is750" for NXP SC16IS750,

  - "nxp,sc16is752" for NXP SC16IS752,

  - "nxp,sc16is760" for NXP SC16IS760,

  - "nxp,sc16is762" for NXP SC16IS762.

- reg: SPI chip select number.

- interrupt-parent: The phandle for the interrupt controller that

  services interrupts for this IC.

- interrupts: Specifies the interrupt source of the parent interrupt

  controller. The format of the interrupt specifier depends on the

  parent interrupt controller.

- clocks: phandle to the IC source clock.



Optional properties:

- gpio-controller: Marks the device node as a GPIO controller.

- #gpio-cells: Should be two. The first cell is the GPIO number and

  the second cell is used to specify the GPIO polarity:

    0 = active high,

    1 = active low.



Example:

	sc16is750: sc16is750@0 {

		compatible = "nxp,sc16is750";

		reg = <0>;

		clocks = <&clk20m>;

		interrupt-parent = <&gpio3>;

		interrupts = <7 IRQ_TYPE_EDGE_FALLING>;

		gpio-controller;

		#gpio-cells = <2>;

	};

Documentation/devicetree/bindings/serial/renesas,sci-serial.txt

+7 −0
Original line number Diff line number Diff line
@@ -45,6 +45,11 @@ Required properties: 
Note: Each enabled SCIx UART should have an alias correctly numbered in the

"aliases" node.



Optional properties:

  - dmas: Must contain a list of two references to DMA specifiers, one for

	  transmission, and one for reception.

  - dma-names: Must contain a list of two DMA names, "tx" and "rx".



Example:

	aliases {

		serial0 = &scifa0;
@@ -57,4 +62,6 @@ Example: 
		interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&mstp2_clks R8A7790_CLK_SCIFA0>;

		clock-names = "sci_ick";

		dmas = <&dmac0 0x21>, <&dmac0 0x22>;

		dma-names = "tx", "rx";

	};

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