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/Linux-v6.1/Documentation/devicetree/bindings/serial/
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 Bindings
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:
18 description: prop-encoded-array <a b>
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D8250_omap.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Vignesh Raghavendra <vigneshr@ti.com>
13 - $ref: /schemas/serial/serial.yaml#
14 - $ref: /schemas/serial/rs485.yaml#
19 - enum:
20 - ti,am3352-uart
21 - ti,am4372-uart
22 - ti,am654-uart
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/Linux-v6.1/arch/arm64/boot/dts/freescale/
Dimx8mp-verdin-dev.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
6 #include "imx8mp-verdin-dahlia.dtsi"
11 reg_eth2phy: regulator-eth2phy {
12 compatible = "regulator-fixed";
13 enable-active-high;
15 off-on-delay = <500000>;
16 regulator-max-microvolt = <3300000>;
17 regulator-min-microvolt = <3300000>;
18 regulator-name = "+V3.3_ETH";
19 startup-delay-us = <200000>;
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Dimx8mm-mx8menlo.dts1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
3 * Copyright 2021-2022 Marek Vasut <marex@denx.de>
6 /dts-v1/;
8 #include "imx8mm-verdin.dtsi"
13 "toradex,verdin-imx8mm",
16 /delete-node/ gpio-keys;
19 compatible = "gpio-leds";
20 pinctrl-names = "default";
21 pinctrl-0 = <&pinctrl_led>;
23 led-1 {
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Dimx8mn-venice-gw7902.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/net/ti-dp83867.h>
17 compatible = "gw,imx8mn-gw7902", "fsl,imx8mn";
24 stdout-path = &uart2;
33 compatible = "fixed-clock";
34 #clock-cells = <0>;
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Dimx8mm-venice-gw7902.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/net/ti-dp83867.h>
12 #include <dt-bindings/phy/phy-imx8-pcie.h>
18 compatible = "gw,imx8mm-gw7902", "fsl,imx8mm";
27 stdout-path = &uart2;
36 compatible = "fixed-clock";
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/Linux-v6.1/arch/arm/boot/dts/
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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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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Dimx6ull-phytec-tauri.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
7 /dts-v1/;
9 #include "imx6ull-phytec-phycore-som.dtsi"
13 model = "PHYTEC phyGate-Tauri i.MX6 UltraLite";
14 compatible = "phytec,imx6ull-phygate-tauri",
15 "phytec,imx6ull-pcl063", "fsl,imx6ull";
22 gpio_keys: gpio-keys {
23 compatible = "gpio-key";
24 pinctrl-names = "default";
25 pinctrl-0 = <&pinctrl_gpio_keys>;
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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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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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Dam335x-nano.dts1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2013 Newflow Ltd - http://www.newflow.co.uk/
5 /dts-v1/;
15 cpu0-supply = <&dcdc2_reg>;
25 compatible = "gpio-leds";
30 default-state = "off";
36 pinctrl-names = "default";
37 pinctrl-0 = <&misc_pins>;
40 pinctrl-single,pins = <
46 pinctrl-single,pins = <
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Dimx6qdl-nitrogen6_max.dtsi1 // SPDX-License-Identifier: GPL-2.0 OR X11
5 #include <dt-bindings/gpio/gpio.h>
6 #include <dt-bindings/input/input.h>
10 stdout-path = &uart2;
19 compatible = "simple-bus";
20 #address-cells = <1>;
21 #size-cells = <0>;
24 compatible = "regulator-fixed";
26 regulator-name = "1P8V";
27 regulator-min-microvolt = <1800000>;
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Dimx6q-bosch-acc.dts1 // SPDX-License-Identifier: GPL-2.0
3 * Support for the i.MX6-based Bosch ACC board.
8 * Copyright (C) 2019-2021 Bosch Thermotechnik GmbH, Matthias Winker <matthias.winker@bosch.com>
12 /dts-v1/;
14 #include <dt-bindings/gpio/gpio.h>
15 #include <dt-bindings/leds/common.h>
20 compatible = "bosch,imx6q-acc", "fsl,imx6q";
37 backlight_lvds: backlight-lvds {
38 compatible = "pwm-backlight";
40 brightness-levels = <0 61 499 1706 4079 8022 13938 22237 33328 47623 65535>;
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/Linux-v6.1/drivers/tty/serial/8250/
D8250_dwlib.c1 // SPDX-License-Identifier: GPL-2.0+
17 #define DW_UART_TCR 0xac /* Transceiver Control Register (RS485) */
79 struct dw8250_port_data *d = p->private_data; in dw8250_get_divisor()
81 quot = p->uartclk / base_baud; in dw8250_get_divisor()
82 rem = p->uartclk % base_baud; in dw8250_get_divisor()
83 *frac = DIV_ROUND_CLOSEST(rem << d->dlf_size, base_baud); in dw8250_get_divisor()
98 p->status &= ~UPSTAT_AUTOCTS; in dw8250_do_set_termios()
99 if (termios->c_cflag & CRTSCTS) in dw8250_do_set_termios()
100 p->status |= UPSTAT_AUTOCTS; in dw8250_do_set_termios()
105 p->ignore_status_mask |= DW_UART_LSR_ADDR_RCVD; in dw8250_do_set_termios()
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D8250_port.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Base port operations for 8250/16550-type serial ports
254 * tx_loadsz is set to 63-bytes instead of 64-bytes to implement
255 * workaround of errata A-008006 which states that tx_loadsz should
267 .name = "Palmchip BK-3103",
337 #define UART_REG_UNMAPPED -1
369 return __raw_readl(p->membase + (offset << p->regshift)); in au_serial_in()
379 __raw_writel(value, p->membase + (offset << p->regshift)); in au_serial_out()
385 return __raw_readl(up->port.membase + 0x28); in au_serial_dl_read()
390 __raw_writel(value, up->port.membase + 0x28); in au_serial_dl_write()
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/Linux-v6.1/drivers/tty/serial/
Domap-serial.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Driver for OMAP-UART controller.
16 * this driver as required for the omap-platform.
38 #include <linux/platform_data/serial-omap.h>
79 #define OMAP_UART_DMA_CH_FREE -1
108 * Buffer for rx dma. It is not required for tx because the buffer
118 /* timer to poll activity on rx dma */
176 offset <<= up->port.regshift; in serial_in()
177 return readw(up->port.membase + offset); in serial_in()
182 offset <<= up->port.regshift; in serial_out()
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Dserial_core.c1 // SPDX-License-Identifier: GPL-2.0+
8 * Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
39 * lockdep: port->lock is initialized in two places, but we
40 * want only one lock-class:
44 #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
47 * Max time with active RTS before/after data is sent.
61 return !!(uport->status & UPSTAT_DCD_ENABLE); in uart_dcd_enabled()
66 if (atomic_add_unless(&state->refcount, 1, 0)) in uart_port_ref()
67 return state->uart_port; in uart_port_ref()
73 if (atomic_dec_and_test(&uport->state->refcount)) in uart_port_deref()
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Datmel_serial.c1 // SPDX-License-Identifier: GPL-2.0+
18 #include <linux/clk-provider.h>
25 #include <linux/dma-mapping.h>
47 * These two offsets are substracted from the RX FIFO size to define the RTS
48 * high and low thresholds
63 /* Use device name ttyAT, major 204 and minor 154-169. This is necessary if we
72 /* Use device name ttyS, major 4, minor 64-68. This is the usual serial port
121 short pdc_rx_idx; /* current PDC RX buffer */
166 bool hd_start_rx; /* can start RX during half-duplex operation */
196 { .compatible = "atmel,at91rm9200-usart-serial" },
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Dfsl_lpuart.c1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright 2012-2014 Freescale Semiconductor, Inc.
11 #include <linux/dma-mapping.h>
25 /* All registers are 8-bit width */
114 /* 32-bit global registers only for i.MX7ULP/i.MX8x
119 /* 32-bit register definition */
233 /* Rx DMA timeout in ms, which is used to calculate Rx ring buffer size */
236 #define DRIVER_NAME "fsl-lpuart"
321 { .compatible = "fsl,vf610-lpuart", .data = &vf_data, },
322 { .compatible = "fsl,ls1021a-lpuart", .data = &ls1021a_data, },
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Dsc16is7xx.c1 // SPDX-License-Identifier: GPL-2.0+
3 * SC16IS7xx tty serial driver - Copyright (C) 2014 GridPoint
33 #define SC16IS7XX_RHR_REG (0x00) /* RX FIFO */
44 #define SC16IS7XX_RXLVL_REG (0x09) /* RX FIFO level */
46 * - only on 75x/76x
49 * - only on 75x/76x
52 * - only on 75x/76x
55 * - only on 75x/76x
65 #define SC16IS7XX_DLH_REG (0x01) /* Divisor Latch High */
75 #define SC16IS7XX_IER_RDI_BIT (1 << 0) /* Enable RX data interrupt */
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/Linux-v6.1/Documentation/firmware-guide/acpi/
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
121 FixedDMA resource array, "rx" means the second entry. The table below shows a
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/Linux-v6.1/include/linux/
Dserial_core.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
24 ((port)->cons && (port)->cons->index == (port)->line)
35 * struct uart_ops -- interface between serial_core and the driver
56 * - %TIOCM_RTS RTS signal.
57 * - %TIOCM_DTR DTR signal.
58 * - %TIOCM_OUT1 OUT1 signal.
59 * - %TIOCM_OUT2 OUT2 signal.
60 * - %TIOCM_LOOP Set the port into loopback mode.
63 * active. If the bit is clear, the signal should be driven
66 * Locking: @port->lock taken.
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