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/Linux-v6.1/sound/soc/codecs/
Dadau1372.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
25 #include "adau-utils.h"
127 static const DECLARE_TLV_DB_MINMAX(adau1372_digital_tlv, -9563, 0);
128 static const DECLARE_TLV_DB_SCALE(adau1372_pga_tlv, -1200, 75, 0);
191 SOC_ENUM("ADC 0+1 High-Pass-Filter", adau1372_hpf0_1_enum),
192 SOC_ENUM("ADC 2+3 High-Pass-Filter", adau1372_hpf2_3_enum),
269 SOC_DAPM_ENUM("Output ASRC0 Capture Mux", adau1372_asrco0_mux_enum);
271 SOC_DAPM_ENUM("Output ASRC1 Capture Mux", adau1372_asrco1_mux_enum);
273 SOC_DAPM_ENUM("Output ASRC2 Capture Mux", adau1372_asrco2_mux_enum);
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Dtlv320aic3x.h1 /* SPDX-License-Identifier: GPL-2.0-only */
44 /* Audio serial data interface control register A */
46 /* Audio serial data interface control register B */
48 /* Audio serial data interface control register C */
82 /* DAC Power and Left High Power Output control registers */
85 /* Right High Power Output control registers */
87 /* High Power Output Stage Control Register */
89 /* DAC Output Switching control registers */
91 /* High Power Output Driver Pop Reduction registers */
96 /* Left High Power Output control registers */
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/Linux-v6.1/include/dt-bindings/pinctrl/
Dk210-fpioa.h1 /* SPDX-License-Identifier: GPL-2.0+ */
11 * kendryte-standalone-sdk/lib/drivers/include/fpioa.h
31 #define K210_PCF_SPI0_SCLK 17 /* SPI0 Serial Clock */
97 #define K210_PCF_SPI1_SCLK 83 /* SPI1 Serial Clock */
100 #define K210_PCF_SPI2_SCLK 86 /* SPI2 Serial Clock */
102 #define K210_PCF_I2S0_SCLK 88 /* I2S0 Serial Clock(BCLK) */
104 #define K210_PCF_I2S0_IN_D0 90 /* I2S0 Serial Data Input 0 */
105 #define K210_PCF_I2S0_IN_D1 91 /* I2S0 Serial Data Input 1 */
106 #define K210_PCF_I2S0_IN_D2 92 /* I2S0 Serial Data Input 2 */
107 #define K210_PCF_I2S0_IN_D3 93 /* I2S0 Serial Data Input 3 */
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/Linux-v6.1/drivers/tty/serial/
Dsh-sci.h1 /* SPDX-License-Identifier: GPL-2.0 */
15 SCSMR, /* Serial Mode Register */
17 SCSCR, /* Serial Control Register */
18 SCxSR, /* Serial Status Register */
26 SCSPTR, /* Serial Port Register */
28 SCPCR, /* Serial Port Control Register */
29 SCPDR, /* Serial Port Data Register */
34 SEMR, /* Serial extended mode register */
40 /* SCSMR (Serial Mode Register) */
42 #define SCSMR_CSYNC BIT(7) /* - Clocked synchronous mode */
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/Linux-v6.1/Documentation/devicetree/bindings/sound/
Dfsl,audmix.txt3 The Audio Mixer is a on-chip functional module that allows mixing of two
4 audio streams into a single audio stream. Audio Mixer has two input serial
6 modules (SAI). Each input serial interface carries 8 audio channels in its
9 two inputs can be attenuated based on configuration. The output of the
10 Audio Mixer is also a serial audio interface. Like input interfaces it has
11 the same TDM frame format. This output is used to drive the serial DAC TDM
15 The output of Audio Mixer can be selected from any of the three streams
16 - serial audio input 1
17 - serial audio input 2
18 - mixed audio
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/Linux-v6.1/Documentation/admin-guide/
Dserial-console.rst3 Linux Serial Console
6 To use a serial port as console you need to compile the support into your
7 kernel - by default it is not compiled in. For PC style serial ports
10 …n:`Character devices --> Serial drivers --> 8250/16550 and compatible serial support --> Console o…
12 You must compile serial support into the kernel and not as a module.
14 It is possible to specify multiple devices for console output. You can
16 use for console output.
24 ttySx for a serial port
26 ttyUSB0 for the first USB serial device
28 options: depend on the driver. For the serial port this
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/Linux-v6.1/arch/powerpc/
DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0
4 bool "Don't build arch/powerpc code with -Werror"
7 arch/powerpc with the -Werror flag (which means warnings
47 emulated by the in-kernel emulator. Counters for the various classes
51 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
56 bool "Run self-tests of the code-patching code"
78 bool "Run self-tests of the feature-fixup code"
82 bool "Run self-tests of the MSI bitmap code"
98 Include in-kernel hooks for the xmon kernel monitor/debugger.
123 to say Y here, unless you're building for a memory-constrained
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/Linux-v6.1/drivers/usb/serial/
Dbelkin_sa.h1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Definitions for Belkin USB Serial Adapter Driver
8 * This program is largely derived from work by the linux-usb group
9 * and associated source files. Please see the usb/serial files for
12 * See Documentation/usb/usb-serial.rst for more information on using this
15 * 12-Mar-2001 gkh
16 * Added GoHubs GO-COM232 device id.
18 * 06-Nov-2000 gkh
21 * 12-Oct-2000 William Greathouse
22 * First cut at supporting Belkin USB Serial Adapter F5U103
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Dcypress_m8.h1 /* SPDX-License-Identifier: GPL-2.0 */
6 * definitions and function prototypes used for the cypress USB to Serial
11 * For sending our feature buffer - controlling serial communication states.
12 * Linux HID has no support for serial devices so we do this through the driver
17 /* List other cypress USB to Serial devices here, and add them to the id_table */
19 /* DeLorme Earthmate USB - a GPS device */
24 /* Cypress HID->COM RS232 Adapter */
28 /* Simply Automated HID->COM UPB PIM (using Cypress PID 0x5500) */
31 /* FRWD Dongle - a GPS sports watch */
39 /* Nokia CA-42 USB to serial cable */
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/Linux-v6.1/sound/ppc/
Dsnd_ps3_reg.h1 /* SPDX-License-Identifier: GPL-2.0-only */
39 * three wire serial
73 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
75 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
96 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
98 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
106 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
108 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
125 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
127 +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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/Linux-v6.1/Documentation/ia64/
Dserial.rst2 Serial Devices
5 Serial Device Naming
8 As of 2.6.10, serial devices on ia64 are named based on the
16 - Firmware on some machines (mostly from HP) provides an HCDP
18 as a serial console. If the user specified "console=ttyS0"
23 - If there was no HCDP, we assumed there were UARTs at the
34 For example, an HP rx1600 with a single built-in serial port
39 Type MMIO pre-2.6.10 pre-2.6.10 2.6.10+
56 table[1] does tell the kernel where potential serial console
63 - If your firmware supplies the HCDP, it is simplest to
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/Linux-v6.1/arch/arm/mach-sa1100/include/mach/
DSA-1100.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 * FILE SA-1100.h
9 * System StrongARM SA-1100
12 * SA-1100 microprocessor (Advanced RISC Machine (ARM)
14 * StrongARM SA-1100 data sheet version 2.2.
21 #error You must include hardware.h not SA-1100.h
77 * Universal Serial Bus (USB) Device Controller (UDC) control registers
80 * Ser0UDCCR Serial port 0 Universal Serial Bus (USB) Device
82 * Ser0UDCAR Serial port 0 Universal Serial Bus (USB) Device
84 * Ser0UDCOMP Serial port 0 Universal Serial Bus (USB) Device
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/Linux-v6.1/arch/arm/
DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0
30 Look for a message in dmesg output like this:
44 once the kernel has booted up - it's a one time check.
107 1 - undefined instruction events
108 2 - system calls
109 4 - invalid data aborts
110 8 - SIGSEGV faults
111 16 - SIGBUS faults
115 bool "Kernel low-level debugging functions (read help!)"
128 prompt "Kernel low-level debugging port"
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/Linux-v6.1/drivers/tty/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
8 TTY is required for any text terminals or serial port
23 one can be used for a text-mode user session, and a third could run
25 is done with certain key combinations, usually Alt-<function key>.
38 memory; the only way to log into such a system is then via a serial
42 shiny Linux system :-)
62 the kernel messages be output only to a serial port (in which case
63 you should say Y to "Console on serial port", below).
95 See <file:Documentation/driver-api/console.rst> for more
110 Linux has traditionally used the BSD-like names /dev/ptyxx for
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/Linux-v6.1/arch/m68k/
DKconfig.devices1 # SPDX-License-Identifier: GPL-2.0
15 Use the power-on LED on your machine as a load meter. The exact
16 behavior is platform-dependent, but normally the flash frequency is
17 a hyperbolic function of the 5-minute load average.
19 # We have a dedicated heartbeat LED. :-)
48 which allows the console output to be redirected to the stderr
49 output of ARAnyM.
98 tristate "Amiga builtin serial support"
101 If you want to use your Amiga's built-in serial port in Linux,
107 tristate "HP DCA serial support"
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/Linux-v6.1/arch/arm64/boot/dts/freescale/
Dimx8-ss-dma.dtsi1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018-2019 NXP
7 #include <dt-bindings/clock/imx8-lpcg.h>
8 #include <dt-bindings/firmware/imx/rsrc.h>
11 compatible = "simple-bus";
12 #address-cells = <1>;
13 #size-cells = <1>;
16 dma_ipg_clk: clock-dma-ipg {
17 compatible = "fixed-clock";
18 #clock-cells = <0>;
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/Linux-v6.1/Documentation/sparc/oradax/
Ddax-hv-api.txt3 Publication date 2017-09-25 08:21
5 Extracted via "pdftotext -f 547 -l 572 -layout sun4v_20170925.pdf"
16 live-migration and other system management activities.
20 …high speed processoring of database-centric operations. The coprocessors may support one or more of
28 …e Completion Area and, unless execution order is specifically restricted through the use of serial-
45 …device node in the guest MD (Section 8.24.17, “Database Analytics Accelerators (DAX) virtual-device
51 36.1.1.1. "ORCL,sun4v-dax" Device Compatibility
54 • No-op/Sync
77 …See Section 36.2.1, “Query CCB Command Formats” for the corresponding CCB input and output formats.
81 36.1.1.2. "ORCL,sun4v-dax-fc" Device Compatibility
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/Linux-v6.1/arch/mips/
DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0
22 "8250/16550 and compatible serial early printk driver"
23 If you say Y here, it will be possible to use a 8250/16550 serial
30 bool "Built-in kernel command line"
41 The built-in options will be concatenated to the default command
43 command line will be ignored and replaced by the built-in string.
46 the command line from the firmware or the second-stage bootloader.
55 the default command line, you can supply some command-line options at
64 bool "Built-in command line overrides firmware arguments"
69 Instead, the built-in command line will be used exclusively.
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/Linux-v6.1/include/sound/
Dcs8427.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
14 #define CS8427_REG_AUTOINC 0x80 /* flag - autoincrement */
34 #define CS8427_REG_QSUBCODE 0x14 /* 0x14-0x1d (10 bytes) */
40 #define CS8427_SWCLK (1<<7) /* 0 = RMCK default, 1 = OMCK output on RMCK pin */
42 #define CS8427_MUTESAO (1<<5) /* mute control for the serial audio output port, 0 = disabled, 1 = …
43 #define CS8427_MUTEAES (1<<4) /* mute control for the AES transmitter output, 0 = disabled, 1 = en…
44 #define CS8427_INTMASK (3<<1) /* interrupt output pin setup mask */
48 #define CS8427_TCBLDIR (1<<0) /* 0 = TCBL is an input, 1 = TCBL is an output */
62 #define CS8427_TXOFF (1<<6) /* AES3 transmitter Output, 0 = normal operation, 1 = off (0V) */
63 #define CS8427_AESBP (1<<5) /* AES3 hardware bypass mode, 0 = normal, 1 = bypass (RX->TX) */
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Dcs4231-regs.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
27 #define CS4231_LEFT_OUTPUT 0x06 /* left output control register */
28 #define CS4231_RIGHT_OUTPUT 0x07 /* right output control register */
29 #define CS4231_PLAYBK_FORMAT 0x08 /* clock and data format - playback - bits 7-0 MCE */
30 #define CS4231_IFACE_CTRL 0x09 /* interface control - bits 7-2 MCE */
51 #define CS4231_LINE_LEFT_OUTPUT 0x19 /* left line output control register (InterWave only) */
52 #define CS4231_VERSION 0x19 /* CS4231(A) - version values */
53 #define CS4231_MONO_CTRL 0x1a /* mono input/output control */
54 #define CS4231_LINE_RIGHT_OUTPUT 0x1b /* right line output control register (InterWave only) */
56 #define CS4235_LEFT_MASTER 0x1b /* left master output control */
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/Linux-v6.1/Documentation/sound/cards/
Dserial-u16550.rst2 Serial UART 16450/16550 MIDI driver
7 * 0 - Roland Soundcanvas support (default)
8 * 1 - Midiator MS-124T support (1)
9 * 2 - Midiator MS-124W S/A mode (2)
10 * 3 - MS-124W M/B mode support (3)
11 * 4 - Generic device with multiple input support (4)
13 For the Midiator MS-124W, you must set the physical M-S and A-B
17 (midiCnD0-midiCnD15). Whenever you write to a different substream, the driver
24 Usage example for simple serial converter:
28 /sbin/modprobe snd-serial-u16550 port=0x3f8 irq=4 speed=115200
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/Linux-v6.1/arch/arm64/boot/dts/sprd/
Dsharkl3.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
9 interrupt-parent = <&gic>;
10 #address-cells = <2>;
11 #size-cells = <2>;
14 compatible = "simple-bus";
15 #address-cells = <2>;
16 #size-cells = <2>;
20 compatible = "sprd,sc9863a-glbregs", "syscon",
21 "simple-mfd";
23 #address-cells = <1>;
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/Linux-v6.1/drivers/net/hamradio/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "Serial port KISS driver"
10 connects the computer's serial port with the radio's microphone
11 input and speaker output).
21 tristate "Serial port 6PACK driver"
26 modem connecting your computer's serial port to your radio's
27 microphone input and speaker output). This protocol can be used as
56 and the AX25-HOWTO, available from
90 modems that connect to a serial interface. The driver supports the
91 ser12 design in full-duplex mode. In addition, it allows the
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/Linux-v6.1/Documentation/usb/
Dusb-serial.rst2 USB serial
8 The USB serial driver currently supports a number of different USB to
9 serial converter products, as well as some devices that use a serial
19 Currently the driver can handle up to 256 different serial interfaces at
45 --------------------------------------
58 -----------------------------------------------
72 This goes against the current documentation for pilot-xfer and other
77 (this is usually /dev/ttyUSB1 if you do not have any other usb-serial
99 Kroah-Hartman at greg@kroah.com
103 -------------------
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/Linux-v6.1/Documentation/driver-api/gpio/
Dintro.rst16 - The descriptor-based interface is the preferred way to manipulate GPIOs,
18 - The legacy integer-based interface which is considered deprecated (but still
21 The remainder of this document applies to the new descriptor-based interface.
23 integer-based interface.
29 A "General Purpose Input/Output" (GPIO) is a flexible software-controlled
37 System-on-Chip (SOC) processors heavily rely on GPIOs. In some cases, every
38 non-dedicated pin can be configured as a GPIO; and most chips have at least
42 also "GPIO Expander" chips that connect using the I2C or SPI serial buses.
43 Most PC southbridges have a few dozen GPIO-capable pins (with only the BIOS
48 - Output values are writable (high=1, low=0). Some chips also have
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