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/openbmc/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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/openbmc/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"
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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 = "imx8mm-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 reg_eth2phy: regulator-eth2phy {
8 compatible = "regulator-fixed";
9 enable-active-high;
11 off-on-delay-us = <500000>;
12 regulator-max-microvolt = <3300000>;
13 regulator-min-microvolt = <3300000>;
14 regulator-name = "+V3.3_ETH";
15 startup-delay-us = <200000>;
16 vin-supply = <&reg_3p3v>;
[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";
30 stdout-path = &uart2;
38 gpio-keys {
39 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";
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/openbmc/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 Dimx.c1 // SPDX-License-Identifier: GPL-2.0+
30 #include <linux/dma-mapping.h>
33 #include <linux/dma/imx-dma.h>
74 #define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */
82 #define UCR2_IRTS (1<<14) /* Ignore RTS pin */
125 #define UFCR_RFDIV_REG(x) (((x) < 7 ? 6 - (x) : 6) << 7)
128 #define USR1_RTSS (1<<14) /* RTS pin status */
130 #define USR1_RTSD (1<<12) /* RTS delta */
148 #define USR2_RTSF (1<<4) /* RTS edge interrupt flag */
161 /* We've been assigned a range on the "Low-density serial ports" major */
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H A Datmel_serial.c1 // SPDX-License-Identifier: GPL-2.0+
18 #include <linux/clk-provider.h>
24 #include <linux/dma-mapping.h>
46 * These two offsets are substracted from the RX FIFO size to define the RTS
47 * high and low thresholds
62 /* Use device name ttyAT, major 204 and minor 154-169. This is necessary if we
71 /* Use device name ttyS, major 4, minor 64-68. This is the usual serial port
165 bool hd_start_rx; /* can start RX during half-duplex operation */
195 { .compatible = "atmel,at91rm9200-usart-serial" },
208 return __raw_readl(port->membase + reg); in atmel_uart_readl()
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H A Dsc16is7xx.c1 // SPDX-License-Identifier: GPL-2.0+
3 * SC16IS7xx tty serial driver - Copyright (C) 2014 GridPoint
47 * - only on 75x/76x
50 * - only on 75x/76x
53 * - only on 75x/76x
56 * - only on 75x/76x
65 #define SC16IS7XX_DLL_REG (0x00) /* Divisor Latch Low */
84 /* IER register bits - write only if (EFR[4] == 1) */
97 /* FCR register bits - write only if (EFR[4] == 1) */
107 #define SC16IS7XX_IIR_RTOI_SRC 0x0c /* RX time-out interrupt */
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H A Dfsl_lpuart.c1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright 2012-2014 Freescale Semiconductor, Inc.
13 #include <linux/dma-mapping.h>
29 /* All registers are 8-bit width */
118 /* 32-bit global registers only for i.MX7ULP/i.MX8x
123 /* 32-bit register definition */
244 #define DRIVER_NAME "fsl-lpuart"
337 .rx_watermark = 7, /* A lower watermark is ideal for low baud rates. */
347 { .compatible = "fsl,vf610-lpuart", .data = &vf_data, },
348 { .compatible = "fsl,ls1021a-lpuart", .data = &ls1021a_data, },
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/openbmc/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";
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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;
24 compatible = "gpio-beeper";
29 stdout-path = &uart6;
32 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;
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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 …]
/openbmc/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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/openbmc/linux/include/linux/
H A Dserial_core.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
24 ((port)->cons && (port)->cons->index == (port)->line)
36 * struct uart_ops -- interface between serial_core and the driver
57 * - %TIOCM_RTS RTS signal.
58 * - %TIOCM_DTR DTR signal.
59 * - %TIOCM_OUT1 OUT1 signal.
60 * - %TIOCM_OUT2 OUT2 signal.
61 * - %TIOCM_LOOP Set the port into loopback mode.
64 * active. If the bit is clear, the signal should be driven
67 * Locking: @port->lock taken.
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/openbmc/linux/arch/arm64/boot/dts/ti/
H A Dk3-am642-tqma64xxl-mbax4xxl.dts1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
4 * Copyright (c) 2022-2023 TQ-Systems GmbH <linux@ew.tq-group.com>, D-82229 Seefeld, Germany.
7 /dts-v1/;
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/input/input.h>
11 #include <dt-bindings/net/ti-dp83867.h>
12 #include <dt-bindings/phy/phy.h>
13 #include <dt-bindings/pwm/pwm.h>
14 #include "k3-serdes.h"
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/openbmc/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
255 * tx_loadsz is set to 63-bytes instead of 64-bytes to implement
256 * workaround of errata A-008006 which states that tx_loadsz should
268 .name = "Palmchip BK-3103",
354 offset = offset << p->regshift; in hub6_serial_in()
355 outb(p->hub6 - 1 + offset, p->iobase); in hub6_serial_in()
356 return inb(p->iobase + 1); in hub6_serial_in()
361 offset = offset << p->regshift; in hub6_serial_out()
362 outb(p->hub6 - 1 + offset, p->iobase); in hub6_serial_out()
[all …]
H A D8250_pci.c1 // SPDX-License-Identifier: GPL-2.0
3 * Probe module for 8250/16550-type PCI serial ports.
31 * > 0 - number of ports
32 * = 0 - use board->num_ports
33 * < 0 - error
83 "Please send the output of lspci -vv, this\n" in moan_device()
86 "modem board to <linux-serial@vger.kernel.org>.\n", in moan_device()
87 str, dev->vendor, dev->device, in moan_device()
88 dev->subsystem_vendor, dev->subsystem_device); in moan_device()
95 return serial8250_pci_setup_port(priv->dev, port, bar, offset, regshift); in setup_port()
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/openbmc/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
151 The interrupt name can be listed in _DSD as 'interrupt-names'. The names
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/openbmc/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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