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authorLinus Torvalds <torvalds@linux-foundation.org>2016-05-20 20:57:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-20 20:57:27 -0700
commite10abc629f38efd9b6936cf3612583cc846104d9 (patch)
tree58fb8f6dba5d085d4b0352137d18faf7cfa47a69 /Documentation/devicetree/bindings/serial/serial.txt
parent0eff4589c36edd03d50b835d0768b2c2ef3f20bd (diff)
parentd20bb59af64667a16f2468b54fc0adb2f824a3b6 (diff)
downloadlinux-e10abc629f38efd9b6936cf3612583cc846104d9.tar.gz
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 ...
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+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";
+ };