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/linux/drivers/tty/serial/
H A Dmux.c1 // SPDX-License-Identifier: GPL-2.0+
3 ** mux.c:
4 ** serial driver for the Mux console found in some PA-RISC servers.
7 ** (c) Copyright 2002 Hewlett-Packard Company
9 ** This Driver currently only supports the console (port 0) on the MUX.
11 ** functionality of the MUX.
18 #include <linux/serial.h>
26 #include <asm/parisc-device.h>
63 #define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET)
64 #define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET)
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/linux/Documentation/driver-api/tty/
H A Dn_gsm.rst10 https://www.3gpp.org/ftp/Specs/archive/07_series/07.10/0710-720.zip
13 modems connected to a physical serial port.
19 ----------------
21 #. Initialize the modem in 0710 mux mode (usually ``AT+CMUX=`` command) through
22 its serial port. Depending on the modem used, you can pass more or less
25 #. Switch the serial line to using the n_gsm line discipline by using
28 #. Configure the mux using ``GSMIOC_GETCONF_EXT``/``GSMIOC_SETCONF_EXT`` ioctl if needed.
30 #. Configure the mux using ``GSMIOC_GETCONF``/``GSMIOC_SETCONF`` ioctl.
32 #. Configure DLCs using ``GSMIOC_GETCONF_DLCI``/``GSMIOC_SETCONF_DLCI`` ioctl for non-defaults.
34 #. Obtain base gsmtty number for the used serial port.
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/linux/drivers/net/usb/
H A Dhso.c1 // SPDX-License-Identifier: GPL-2.0-only
12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
22 * The multiplexed serial ports are using the interrupt and
31 * Interface 2: Standard modem interface - circuit switched interface, this
60 #include <linux/serial.h>
83 /* - use *_bit operations on it. (bit indices not values.) */
203 on which serial port it is used on. */
230 int (*write_data) (struct hso_serial *serial);
233 * working on the serial receive buffers
290 /* Serial driver functions */
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/linux/Documentation/devicetree/bindings/soc/qcom/
H A Dqcom,gsbi.yaml1 # SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm General Serial Bus Interface (GSBI)
10 - Andy Gross <agross@kernel.org>
11 - Bjorn Andersson <bjorn.andersson@linaro.org>
12 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
16 representing a serial sub-node device that is mux'd as part of the GSBI
20 A GSBI controller node can contain 0 or more child nodes representing serial
21 devices. These serial devices can be a QCOM UART, I2C controller, spi
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/linux/arch/arm64/boot/dts/mediatek/
H A Dmt7622-rfb1.dts6 * SPDX-License-Identifier: (GPL-2.0 OR MIT)
9 /dts-v1/;
10 #include <dt-bindings/input/input.h>
11 #include <dt-bindings/gpio/gpio.h>
18 chassis-type = "embedded";
19 compatible = "mediatek,mt7622-rfb1", "mediatek,mt7622";
26 stdout-path = "serial0:115200n8";
32 proc-supply = <&mt6380_vcpu_reg>;
33 sram-supply = <&mt6380_vm_reg>;
37 proc-supply = <&mt6380_vcpu_reg>;
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H A Dmt7622-bananapi-bpi-r64.dts5 * SPDX-License-Identifier: (GPL-2.0 OR MIT)
8 /dts-v1/;
9 #include <dt-bindings/input/input.h>
10 #include <dt-bindings/gpio/gpio.h>
11 #include <dt-bindings/leds/common.h>
17 model = "Bananapi BPI-R64";
18 chassis-type = "embedded";
19 compatible = "bananapi,bpi-r64", "mediatek,mt7622";
26 stdout-path = "serial0:115200n8";
32 proc-supply = <&mt6380_vcpu_reg>;
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/linux/drivers/net/mctp/
H A DKconfig7 tristate "MCTP serial transport"
11 This driver provides an MCTP-over-serial interface, through a
12 serial line-discipline, as defined by DMTF specification "DSP0253 -
13 MCTP Serial Transport Binding". By attaching the ldisc to a serial
17 serial as their transport. It can also be used as an easy way to
19 data between simple virtual serial devices.
21 Say y here if you need to connect to MCTP endpoints over serial. To
22 compile as a module, use m; the module will be called mctp-serial.
25 bool "MCTP serial tests" if !KUNIT_ALL_TESTS
31 # i2c-mux is optional, but we must build as a module if i2c-mux is a module
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/linux/arch/arm/boot/dts/mediatek/
H A Dmt7629-rfb.dts1 // SPDX-License-Identifier: GPL-2.0
7 /dts-v1/;
8 #include <dt-bindings/input/input.h>
13 compatible = "mediatek,mt7629-rfb", "mediatek,mt7629";
20 stdout-path = "serial0:115200n8";
23 gpio-keys {
24 compatible = "gpio-keys";
26 button-reset {
32 button-wps {
44 reg_3p3v: regulator-3p3v {
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/linux/include/linux/
H A Ddio.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Maybe this should handle DIO-II later?
19 * range from 0-63 (DIO) and 132-255 (DIO-II).
22 * So DIO cards cover [0x600000-0x800000); the areas [0x200000-0x400000) and
23 * [0x800000-0x1000000) are for additional space required by things
24 * like framebuffers. [0x400000-0x600000) is for miscellaneous internal I/O.
27 * DIO-II boards are at 0x1000000 + (sc - 132) * 0x400000
28 * which is address range [0x1000000-0x20000000) -- too big to map completely,
29 * so currently we just don't handle DIO-II boards. It wouldn't be hard to
92 …void (*remove)(struct dio_dev *z); /* Device removed (NULL if not a hot-plug capable driver…
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/linux/arch/arm/boot/dts/marvell/
H A Dmmp2.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
7 #include <dt-bindings/clock/marvell,mmp2.h>
8 #include <dt-bindings/power/marvell,mmp2.h>
9 #include <dt-bindings/clock/marvell,mmp2-audio.h>
12 #address-cells = <1>;
13 #size-cells = <1>;
25 #address-cells = <1>;
26 #size-cells = <1>;
27 compatible = "simple-bus";
28 interrupt-parent = <&intc>;
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H A Dmmp3.dtsi1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
6 #include <dt-bindings/clock/marvell,mmp2.h>
7 #include <dt-bindings/power/marvell,mmp2.h>
8 #include <dt-bindings/interrupt-controller/arm-gic.h>
11 #address-cells = <1>;
12 #size-cells = <1>;
15 #address-cells = <1>;
16 #size-cells = <0>;
17 enable-method = "marvell,mmp3-smp";
22 next-level-cache = <&l2>;
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/linux/arch/arm/boot/dts/intel/pxa/
H A Dpxa2xx.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * pxa2xx.dtsi - Device Tree Include file for Marvell PXA2xx family SoC
8 #include "dt-bindings/clock/pxa-clock.h"
12 mux- ## func { \
17 mux- ## func { \
20 low-power-disable; \
23 mux- ## func { \
26 low-power-enable; \
30 #address-cells = <1>;
31 #size-cells = <1>;
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/linux/arch/arm/boot/dts/nuvoton/
H A Dnuvoton-wpcm450.dtsi1 // SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
4 #include <dt-bindings/interrupt-controller/irq.h>
8 #address-cells = <1>;
9 #size-cells = <1>;
23 #address-cells = <1>;
24 #size-cells = <0>;
27 compatible = "arm,arm926ej-s";
33 clk24m: clock-24mhz {
35 compatible = "fixed-clock";
36 clock-frequency = <24000000>;
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H A Dnuvoton-wpcm450-supermicro-x9sci-ln4f.dts1 // SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
4 /dts-v1/;
9 #include "nuvoton-wpcm450.dtsi"
11 #include <dt-bindings/input/linux-event-codes.h>
12 #include <dt-bindings/gpio/gpio.h>
15 model = "Supermicro X9SCi-LN4F BMC";
16 compatible = "supermicro,x9sci-ln4f-bmc", "nuvoton,wpcm450";
24 stdout-path = "serial0:115200n8";
32 gpio-keys {
33 compatible = "gpio-keys";
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/linux/arch/arm/boot/dts/ti/omap/
H A Domap-zoom-common.dtsi1 // SPDX-License-Identifier: GPL-2.0
6 #include "omap-gpmc-smsc911x.dtsi"
13 * Four port TL16CP754C serial port on GPMC,
17 serial@3,0 {
20 bank-width = <2>;
21 reg-shift = <1>;
22 reg-io-width = <1>;
23 interrupt-parent = <&gpio4>;
25 clock-frequency = <1843200>;
26 current-speed = <115200>;
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/linux/Documentation/admin-guide/media/
H A Dimx7.rst1 .. SPDX-License-Identifier: GPL-2.0
7 ------------
14 - CMOS Sensor Interface (CSI)
15 - Video Multiplexer
16 - MIPI CSI-2 Receiver
18 .. code-block:: none
20 MIPI Camera Input ---> MIPI CSI-2 --- > |\
24 | U | ------> CSI ---> Capture
27 Parallel Camera Input ----------------> | /
34 --------
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/linux/Documentation/devicetree/bindings/dma/
H A Dlpc1850-dmamux.txt1 NXP LPC18xx/43xx DMA MUX (DMA request router)
4 - compatible: "nxp,lpc1850-dmamux"
5 - reg: Memory map for accessing module
6 - #dma-cells: Should be set to <3>.
8 * 2nd cell contain the mux value (0-3) for the peripheral
11 - dma-requests: Number of DMA requests for the mux
12 - dma-masters: phandle pointing to the DMA controller
15 - dma-requests: Number of DMA requests the controller can handle
20 compatible = "nxp,lpc1850-gpdma", "arm,pl080", "arm,primecell";
21 arm,primecell-periphid = <0x00041080>;
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/linux/sound/soc/codecs/
H A Dadau1761.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright 2011-2013 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
125 static const DECLARE_TLV_DB_SCALE(adau1761_sing_in_tlv, -1500, 300, 1);
126 static const DECLARE_TLV_DB_SCALE(adau1761_diff_in_tlv, -1200, 75, 0);
127 static const DECLARE_TLV_DB_SCALE(adau1761_out_tlv, -5700, 100, 0);
128 static const DECLARE_TLV_DB_SCALE(adau1761_sidetone_tlv, -1800, 300, 1);
129 static const DECLARE_TLV_DB_SCALE(adau1761_boost_tlv, -600, 600, 1);
130 static const DECLARE_TLV_DB_SCALE(adau1761_pga_boost_tlv, -2000, 2000, 1);
132 static const DECLARE_TLV_DB_SCALE(adau1761_alc_max_gain_tlv, -1200, 600, 0);
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H A Des8328.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * es8328.c -- ES8328 ALSA SoC Audio driver
5 * Copyright 2014 Sutajio Ko-Usagi PTE LTD
99 static const DECLARE_TLV_DB_SCALE(play_tlv, -3000, 100, 0);
100 static const DECLARE_TLV_DB_SCALE(dac_adc_tlv, -9600, 50, 0);
101 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -1500, 300, 0);
123 if (es8328->deemph) { in es8328_set_deemph()
126 if (abs(deemph_settings[i].rate - es8328->playback_fs) < in es8328_set_deemph()
127 abs(deemph_settings[best].rate - es8328->playback_fs)) in es8328_set_deemph()
136 dev_dbg(component->dev, "Set deemphasis %d\n", val); in es8328_set_deemph()
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/linux/drivers/media/dvb-frontends/
H A Dmxl5xx_defs.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 * Copyright (c) 2011-2013 MaxLinear, Inc. All rights reserved
29 /* Firmware-Host Command IDs */
31 /* --Device command IDs-- */
37 /* Host-used CMD, not used by firmware */
44 /* --Tuner command IDs-- */
48 /* --Demod command IDs-- */
63 /* --- ABORT channel tune */
66 /* --SWM/FSK command IDs-- */
71 /* --DiSeqC command IDs-- */
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/linux/Documentation/networking/caif/
H A Dlinux_caif.rst1 .. SPDX-License-Identifier: GPL-2.0
8 Copyright |copy| ST-Ericsson AB 2010
17 CAIF is a MUX protocol used by ST-Ericsson cellular modems for
22 ST-Ericsson modems support a number of transports between modem
39 ! +------+ +------+
40 ! +------+! +------+!
42 +-------> !interf!+ ! API !+ <- CAIF Client APIs
43 ! +------+ +------!
45 ! +-----------+
47 ! +------+ <- CAIF Core Protocol
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/linux/include/uapi/linux/
H A Dtty.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
21 #define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
22 #define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
27 #define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
28 #define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
32 #define N_GSM0710 21 /* GSM 0710 Mux */
39 #define N_MCTP 28 /* MCTP-over-serial */
40 #define N_DEVELOPMENT 29 /* Manual out-of-tree testing */
41 #define N_CAN327 30 /* ELM327 based OBD-II interfaces */
/linux/arch/arm/boot/dts/microchip/
H A Dlan966x-pcb8309.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * lan966x_pcb8309.dts - Device Tree file for PCB8309
5 /dts-v1/;
7 #include "dt-bindings/phy/phy-lan966x-serdes.h"
10 model = "Microchip EVB - LAN9662";
11 compatible = "microchip,lan9662-pcb8309", "microchip,lan9662", "microchip,lan966";
20 stdout-path = "serial0:115200n8";
23 gpio-restart {
24 compatible = "gpio-restart";
29 i2c-mux {
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/linux/arch/arm64/boot/dts/amlogic/
H A Dmeson-axg.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 #include <dt-bindings/clock/axg-aoclkc.h>
7 #include <dt-bindings/clock/axg-audio-clkc.h>
8 #include <dt-bindings/clock/axg-clkc.h>
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/gpio/meson-axg-gpio.h>
11 #include <dt-bindings/interrupt-controller/irq.h>
12 #include <dt-bindings/interrupt-controller/arm-gic.h>
13 #include <dt-bindings/reset/amlogic,meson-axg-audio-arb.h>
14 #include <dt-bindings/reset/amlogic,meson-axg-reset.h>
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/linux/Documentation/devicetree/bindings/media/i2c/
H A Dmaxim,max9286.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Jacopo Mondi <jacopo+renesas@jmondi.org>
12 - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
13 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
14 - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
18 Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
28 '#address-cells':
31 '#size-cells':
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