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/linux/Documentation/devicetree/bindings/serial/
H A Drs485.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/serial/rs485.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: RS485 serial communications
9 description: The RTS signal is capable of automatically controlling line
10 direction for the built-in half-duplex mode. The properties described
11 hereafter shall be given to a half-duplex capable UART node.
14 - Rob Herring <robh@kernel.org>
17 rs485-rts-delay:
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H A Dst,stm32-uart.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 - Erwan Le Ray <erwan.leray@foss.st.com>
15 - st,stm32-uart
16 - st,stm32f7-uart
17 - st,stm32h7-uart
34 st,hw-flow-ctrl:
38 rx-tx-swap: true
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/linux/arch/arm64/boot/dts/freescale/
H A Dimx8mm-venice-gw72xx-0x-rs422.dtso1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
5 * GW72xx RS422 (RS485 full duplex):
6 * - GPIO1_0 rs485_term selects on-chip termination
7 * - GPIO4_0 rs485_en needs to be driven high (active)
8 * - GPIO4_2 rs485_hd needs to be driven low (in-active)
9 * - UART4_TX is DE for RS485 transmitter
10 * - RS485_EN needs to be pulled high
11 * - RS485_HALF needs to be low
14 #include <dt-bindings/gpio/gpio.h>
16 #include "imx8mm-pinfunc.h"
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H A Dimx8mm-venice-gw73xx-0x-rs422.dtso1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
5 * GW73xx RS422 (RS485 full duplex):
6 * - GPIO1_0 rs485_term selects on-chip termination
7 * - GPIO4_0 rs485_en needs to be driven high (active)
8 * - GPIO4_2 rs485_hd needs to be driven low (in-active)
9 * - UART4_TX is DE for RS485 transmitter
10 * - RS485_EN needs to be pulled high
11 * - RS485_HALF needs to be low
14 #include <dt-bindings/gpio/gpio.h>
16 #include "imx8mm-pinfunc.h"
[all …]
H A Dimx8mm-venice-gw72xx-0x-rs232-rts.dtso1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
5 * GW72xx RS232 with RTS/CTS hardware flow control:
6 * - GPIO4_0 rs485_en needs to be driven low (in-active)
7 * - UART4_TX becomes RTS
8 * - UART4_RX becomes CTS
11 #include <dt-bindings/gpio/gpio.h>
13 #include "imx8mm-pinfunc.h"
15 /dts-v1/;
19 rs485-en-hog {
20 gpio-hog;
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H A Dimx8mm-venice-gw73xx-0x-rs232-rts.dtso1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
5 * GW73xx RS232 with RTS/CTS hardware flow control:
6 * - GPIO4_0 rs485_en needs to be driven low (in-active)
7 * - UART4_TX becomes RTS
8 * - UART4_RX becomes CTS
11 #include <dt-bindings/gpio/gpio.h>
13 #include "imx8mm-pinfunc.h"
15 /dts-v1/;
19 rs485-en-hog {
20 gpio-hog;
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H A Dimx8mn-rve-gateway.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
8 #include <dt-bindings/usb/pd.h>
9 #include "imx8mn-var-som.dtsi"
13 compatible = "rve,gateway", "variscite,var-som-mx8mn", "fsl,imx8mn";
15 crystal_duart_24m: crystal-duart-24m {
16 compatible = "fixed-clock";
17 #clock-cells = <0>;
18 clock-frequency = <24000000>;
21 gpio-keys {
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H A Dimx8mm-verdin-dev.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
7 sound_card: sound-card {
8 compatible = "simple-audio-card";
9 simple-audio-card,bitclock-master = <&dailink_master>;
10 simple-audio-card,format = "i2s";
11 simple-audio-card,frame-master = <&dailink_master>;
12 simple-audio-card,mclk-fs = <256>;
13 simple-audio-card,name = "verdin-nau8822";
14 simple-audio-card,routing =
25 simple-audio-card,widgets =
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H A Dimx8mp-verdin-dev.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
7 native-hdmi-connector {
8 compatible = "hdmi-connector";
14 remote-endpoint = <&hdmi_tx_out>;
19 reg_eth2phy: regulator-eth2phy {
20 compatible = "regulator-fixed";
21 enable-active-high;
23 off-on-delay-us = <500000>;
24 regulator-max-microvolt = <3300000>;
25 regulator-min-microvolt = <3300000>;
[all …]
H A Dimx8mm-venice-gw7901.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
8 #include <dt-bindings/gpio/gpio.h>
9 #include <dt-bindings/input/linux-event-codes.h>
10 #include <dt-bindings/leds/common.h>
11 #include <dt-bindings/phy/phy-imx8-pcie.h>
17 compatible = "gw,imx8mm-gw7901", "fsl,imx8mm";
32 stdout-path = &uart2;
40 gpio-keys {
41 compatible = "gpio-keys";
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H A Dimx8mm-venice-gw73xx.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 #include <dt-bindings/gpio/gpio.h>
7 #include <dt-bindings/leds/common.h>
8 #include <dt-bindings/phy/phy-imx8-pcie.h>
17 led-controller {
18 compatible = "gpio-leds";
19 pinctrl-names = "default";
20 pinctrl-0 = <&pinctrl_gpio_leds>;
22 led-0 {
26 default-state = "on";
[all …]
/linux/arch/arm/boot/dts/ti/omap/
H A Dam335x-regor.dtsi1 // SPDX-License-Identifier: GPL-2.0
8 #include <dt-bindings/gpio/gpio.h>
9 #include <dt-bindings/pinctrl/am33xx.h>
12 model = "Phytec AM335x phyBOARD-REGOR";
13 compatible = "phytec,am335x-regor", "phytec,am335x-phycore-som", "ti,am33xx";
16 compatible = "regulator-fixed";
17 regulator-name = "vcc3v3";
18 regulator-min-microvolt = <3300000>;
19 regulator-max-microvolt = <3300000>;
20 regulator-boot-on;
[all …]
/linux/drivers/tty/serial/
H A Dserial_core.c1 // SPDX-License-Identifier: GPL-2.0+
8 * Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
43 * lockdep: port->lock is initialized in two places, but we
44 * want only one lock-class:
48 #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
51 * Max time with active RTS before/after data is sent.
62 return !!(uport->status & UPSTAT_DCD_ENABLE); in uart_dcd_enabled()
67 if (atomic_add_unless(&state->refcount, 1, 0)) in uart_port_ref()
68 return state->uart_port; in uart_port_ref()
74 if (atomic_dec_and_test(&uport->state->refcount)) in uart_port_deref()
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H A Dsc16is7xx.c1 // SPDX-License-Identifier: GPL-2.0+
3 * SC16IS7xx tty serial driver - common code
53 * - only on 75x/76x
56 * - only on 75x/76x
59 * - only on 75x/76x
62 * - only on 75x/76x
71 #define SC16IS7XX_DLL_REG (0x00) /* Divisor Latch Low */
90 /* IER register bits - write only if (EFR[4] == 1) */
103 /* FCR register bits - write only if (EFR[4] == 1) */
113 #define SC16IS7XX_IIR_RTOI_SRC 0x0c /* RX time-out interrupt */
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/linux/arch/arm/boot/dts/nxp/imx/
H A Dimx6ul-kontron-bl-common.dtsi1 // SPDX-License-Identifier: GPL-2.0
8 #include <dt-bindings/gpio/gpio.h>
11 gpio-leds {
12 compatible = "gpio-leds";
13 pinctrl-names = "default";
14 pinctrl-0 = <&pinctrl_gpio_leds>;
17 label = "debug-led1";
19 default-state = "off";
20 linux,default-trigger = "heartbeat";
24 label = "debug-led2";
[all …]
H A Dimx7-mba7.dtsi1 // SPDX-License-Identifier: GPL-2.0 OR X11
3 * Device Tree Include file for TQ-Systems MBa7 carrier board.
5 * Copyright (C) 2016 TQ-Systems GmbH
6 * Author: Markus Niebel <Markus.Niebel@tq-group.com>
13 #include <dt-bindings/input/input.h>
14 #include <dt-bindings/net/ti-dp83867.h>
20 /delete-property/ mmc2;
26 compatible = "gpio-beeper";
31 stdout-path = &uart6;
34 gpio_buttons: gpio-keys {
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H A Dmba6ulx.dtsi1 // SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
3 * Copyright 2018-2022 TQ-Systems GmbH
4 * Author: Markus Niebel <Markus.Niebel@tq-group.com>
8 model = "TQ-Systems MBA6ULx Baseboard";
18 stdout-path = &uart1;
22 compatible = "pwm-backlight";
23 power-supply = <&reg_mba6ul_3v3>;
24 enable-gpios = <&expander_out0 4 GPIO_ACTIVE_HIGH>;
29 compatible = "gpio-beeper";
33 gpio_buttons: gpio-keys {
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H A Dimx6qdl-mba6.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright 2013-2021 TQ-Systems GmbH
6 * Author: Markus Niebel <Markus.Niebel@tq-group.com>
9 #include <dt-bindings/clock/imx6qdl-clock.h>
10 #include <dt-bindings/gpio/gpio.h>
11 #include <dt-bindings/input/input.h>
12 #include <dt-bindings/sound/fsl-imx-audmux.h>
18 /delete-property/ mmc2;
19 /delete-property/ mmc3;
24 stdout-path = &uart2;
[all …]
H A Dimx6dl-plybas.dts1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
7 /dts-v1/;
8 #include <dt-bindings/gpio/gpio.h>
9 #include <dt-bindings/leds/common.h>
17 stdout-path = &uart4;
21 compatible = "gpio-keys";
24 button-start {
30 button-clean {
38 compatible = "gpio-leds";
39 pinctrl-names = "default";
[all …]
/linux/drivers/usb/serial/
H A Dxr_serial.c1 // SPDX-License-Identifier: GPL-2.0+
10 * https://lore.kernel.org/r/20180404070634.nhspvmxcjwfgjkcv@advantechmxl-desktop
240 u8 channel; /* zero-based index or interface number */
241 struct serial_rs485 rs485; member
247 const struct xr_type *type = data->type; in xr_set_reg()
248 struct usb_serial *serial = port->serial; in xr_set_reg()
251 ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), in xr_set_reg()
252 type->set_reg, in xr_set_reg()
253 USB_DIR_OUT | USB_TYPE_VENDOR | type->reg_recipient, in xr_set_reg()
257 dev_err(&port->dev, "Failed to set reg 0x%02x: %d\n", reg, ret); in xr_set_reg()
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/linux/include/linux/
H A Dserial_core.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
25 ((port)->cons && (port)->cons->index == (port)->line)
37 * struct uart_ops -- interface between serial_core and the driver
58 * - %TIOCM_RTS RTS signal.
59 * - %TIOCM_DTR DTR signal.
60 * - %TIOCM_OUT1 OUT1 signal.
61 * - %TIOCM_OUT2 OUT2 signal.
62 * - %TIOCM_LOOP Set the port into loopback mode.
65 * active. If the bit is clear, the signal should be driven
68 * Locking: @port->lock taken.
[all …]
/linux/arch/arm64/boot/dts/rockchip/
H A Drk3588-tiger-haikou.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
7 #include <dt-bindings/input/input.h>
8 #include <dt-bindings/soc/rockchip,vop2.h>
9 #include "rk3588-tiger.dtsi"
12 model = "Theobroma Systems RK3588-Q7 SoM on Haikou devkit";
13 compatible = "tsd,rk3588-tiger-haikou", "tsd,rk3588-tiger", "rockchip,rk3588";
21 stdout-path = "serial2:115200n8";
24 dc_12v: regulator-dc-12v {
25 compatible = "regulator-fixed";
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/linux/drivers/tty/serial/8250/
H A D8250_port.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Base port operations for 8250/16550-type serial ports
244 * tx_loadsz is set to 63-bytes instead of 64-bytes to implement
245 * workaround of errata A-008006 which states that tx_loadsz should
257 .name = "Palmchip BK-3103",
344 offset = offset << p->regshift; in hub6_serial_in()
345 outb(p->hub6 - 1 + offset, p->iobase); in hub6_serial_in()
346 return inb(p->iobase + 1); in hub6_serial_in()
351 offset = offset << p->regshift; in hub6_serial_out()
352 outb(p->hub6 - 1 + offset, p->iobase); in hub6_serial_out()
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/linux/Documentation/firmware-guide/acpi/
H A Denumeration.rst1 .. SPDX-License-Identifier: GPL-2.0
13 that are accessed through memory-mapped registers.
15 In order to support this and re-use the existing drivers as much as
18 - Devices that have no bus connector resource are represented as
21 - Devices behind real busses where there is a connector resource
34 This means that when ACPI_HANDLE(dev) returns non-NULL the device was
36 device-specific configuration. There is an example of this below.
43 for the device and add supported ACPI IDs. If this same IP-block is used on
44 some other non-ACPI platform, the driver might work out of the box or needs
194 The interrupt name can be listed in _DSD as 'interrupt-names'. The names
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/linux/drivers/tty/
H A Damiserial.c1 // SPDX-License-Identifier: GPL-2.0
9 * associated with the registers and bits of 16550 compatible UARTS -
126 * ------------------------------------------------------------
129 * This routines are called before setting or resetting tty->flow.stopped.
131 * ------------------------------------------------------------
135 struct serial_state *info = tty->driver_data; in rs_stop()
139 if (info->IER & UART_IER_THRI) { in rs_stop()
140 info->IER &= ~UART_IER_THRI; in rs_stop()
152 struct serial_state *info = tty->driver_data; in rs_start()
156 if (info->xmit.head != info->xmit.tail in rs_start()
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