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/linux/Documentation/devicetree/bindings/hwmon/
H A Dntc-thermistor.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 ---
3 $id: http://devicetree.org/schemas/hwmon/ntc-thermistor.yaml#
4 $schema: http://devicetree.org/meta-schemas/core.yaml#
9 - Linus Walleij <linus.walleij@linaro.org>
13 vary in resistance in an often non-linear way in relation to temperature.
16 temperature is non-linear, software drivers most often need to use a look
19 When used in practice, a thermistor is often connected between ground, a
20 pull-up resistor or/and a pull-down resistor and a fixed voltage like this:
22 + e.g. 5V = pull-up voltage (puv)
[all …]
/linux/Documentation/input/devices/
H A Djoystick-parport.rst3 .. _joystick-parport:
9 :Copyright: |copy| 1998-2000 Vojtech Pavlik <vojtech@ucw.cz>
10 :Copyright: |copy| 1998 Andree Borrmann <a.borrmann@tu-bs.de>
18 Any information in this file is provided as-is, without any guarantee that
36 Many console and 8-bit computer gamepads and joysticks are supported. The
40 ------------
50 and/or SNES gamepads and/or SNES mice connected to the parallel port at once,
59 for your pads, use either keyboard or joystick port, and make a pass-through
69 (pin 9) -----> Power
77 (pin 9) ----|>|-------+------> Power
[all …]
/linux/drivers/auxdisplay/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 # see Documentation/kbuild/kconfig-language.rst.
25 This is the base system for character-based LCD displays.
67 Say Y here if you have an HD44780 or KS-0074 LCD connected to your
68 parallel port. This driver also features 4 and 6-key keypads. The LCD
81 This is the index of the parallel port the panel is connected to. One
83 and LCD are connected to two separate ports, you have to start two
88 int "Default panel profile (0-5, 0=custom)"
99 2 = 2x16 serial LCD (KS-0074), new keypad
114 This enables and configures a keypad connected to the parallel port.
[all …]
H A Dpanel.c1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
5 * Copyright (C) 2016-2017 Glider bvba
8 * connected to a parallel printer port.
10 * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
11 * serial module compatible with Samsung's KS0074. The pins may be connected in
15 * data output pins or to the ground. The combinations have to be hard-coded
22 * - the initialization/deinitialization process is very dirty and should
26 * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
27 * - make the LCD a part of a virtual screen of Vx*Vy
[all …]
/linux/Documentation/hwmon/
H A Dntc_thermistor.rst30 -----------
52 +----+-----------------------[read_uV]
56 -+- (ground)
58 2. connect = NTC_CONNECTED_POSITIVE, pullup_ohm = 0 (not-connected)::
64 +----------------------------[read_uV]
68 -+- (ground)
76 +----+-----------------------[read_uV]
80 -+----+- (ground)
82 4. connect = NTC_CONNECTED_GROUND, pulldown_ohm = 0 (not-connected)::
88 +----------------------------[read_uV]
[all …]
H A Dadm1026.rst16 - Philip Pokorny <ppokorny@penguincomputing.com> for Penguin Computing
17 - Justin Thiessen <jthiessen@penguincomputing.com>
20 -----------------
23 List of GPIO pins (0-16) to program as inputs
26 List of GPIO pins (0-16) to program as outputs
29 List of GPIO pins (0-16) to program as inverted
32 List of GPIO pins (0-16) to program as normal/non-inverted
35 List of GPIO pins (0-7) to program as fan tachs
39 -----------
45 16 general purpose digital I/O lines, eight (8) fan speed sensors (8-bit),
[all …]
/linux/Documentation/devicetree/bindings/mfd/
H A Dsamsung,s2mps11.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzk@kernel.org>
18 sub-blocks.
23 - samsung,s2mps11-pmic
24 - samsung,s2mps13-pmic
25 - samsung,s2mps14-pmic
26 - samsung,s2mps15-pmic
27 - samsung,s2mpu02-pmic
[all …]
/linux/Documentation/devicetree/bindings/iio/proximity/
H A Dsemtech,sx9310.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Daniel Campello <campello@chromium.org>
16 https://www.semtech.com/products/smart-sensing/sar-sensors/sx9310
19 - $ref: /schemas/iio/iio.yaml#
24 - semtech,sx9310
25 - semtech,sx9311
37 vdd-supply:
40 svdd-supply:
[all …]
/linux/Documentation/admin-guide/media/
H A Dcec.rst1 .. SPDX-License-Identifier: GPL-2.0
12 - Exynos4
13 - Exynos5
14 - STIH4xx HDMI CEC
15 - V4L2 adv7511 (same HW, but a different driver from the drm adv7511)
16 - stm32
17 - Allwinner A10 (sun4i)
18 - Raspberry Pi
19 - dw-hdmi (Synopsis IP)
20 - amlogic (meson ao-cec and ao-cec-g12a)
[all …]
/linux/Documentation/networking/
H A Dplip.rst1 .. SPDX-License-Identifier: GPL-2.0
14 -----------------
17 This device interface allows a point-to-point connection between two
25 printer port. PLIP is a non-standard, but [can use] uses the standard
26 LapLink null-printer cable [can also work in turbo mode, with a PLIP
62 -------------------
77 On these machines, the PLIP driver can be used in IRQ-less mode, where
82 indicate that there isn't a noticeable performance drop when using IRQ-less
92 When in IRQ-less mode, the PLIP driver polls the parallel port HZ times
99 10^6/HZ usecs. If both sides of a PLIP connection are used in IRQ-less mode,
[all …]
/linux/Documentation/w1/
H A Dw1-generic.rst2 Introduction to the 1-wire (w1) subsystem
5 The 1-wire bus is a simple master-slave bus that communicates via a single
6 signal wire (plus ground, so two wires).
8 Devices communicate on the bus by pulling the signal to ground via an open
14 All w1 slave devices must be connected to a w1 bus master device.
18 - DS9490 usb device
19 - W1-over-GPIO
20 - DS2482 (i2c to w1 bridge)
21 - Emulated devices, such as a RS232 converter, parallel port adapter, etc
25 ------------------------------
[all …]
/linux/arch/arm64/boot/dts/qcom/
H A Dsc7180-trogdor-lazor.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
8 #include "sc7180-trogdor-clamshell.dtsi"
11 semtech,cs0-ground;
12 semtech,combined-sensors = <3>;
14 semtech,startup-sensor = <0>;
15 semtech,proxraw-strength = <8>;
16 semtech,avg-pos-strength = <64>;
34 clock-frequency = <400000>;
37 compatible = "hid-over-i2c";
39 pinctrl-names = "default";
[all …]
/linux/drivers/extcon/
H A Dextcon-max77843.c1 // SPDX-License-Identifier: GPL-2.0+
3 // extcon-max77843.c - Maxim MAX77843 extcon driver to support
9 #include <linux/extcon-provider.h>
13 #include <linux/mfd/max77693-common.h>
14 #include <linux/mfd/max77843-private.h>
141 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
142 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
143 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
144 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
145 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
[all …]
/linux/include/linux/
H A Di2c-of-prober.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
18 * struct i2c_of_probe_ops - I2C OF component prober callbacks
36 * It is OK for this callback to return -EPROBE_DEFER since the intended use includes
61 * struct i2c_of_probe_cfg - I2C OF component prober configuration
77 * Components such as trackpads are commonly connected to a devices baseboard
78 * with a 6-pin ribbon cable. That gives at most one voltage supply and one
80 * pin, and common ground. Touchscreens, while integrated into the display
94 * struct i2c_of_probe_simple_opts - Options for simple I2C component prober callbacks
106 * * @gpio_name is configured to the non-active setting according to @gpio_assert_to_enable.
/linux/drivers/net/can/sja1000/
H A Dems_pcmcia.c1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2010 Markus Plessing <plessing@ems-wuensche.com>
22 MODULE_AUTHOR("Markus Plessing <plessing@ems-wuensche.com>");
23 MODULE_DESCRIPTION("Socket-CAN driver for EMS CPC-CARD cards");
39 * RX1 is connected to ground.
40 * TX1 is not connected.
41 * CLKO is not connected.
43 * This means normal output mode , push-pull and the correct polarity.
54 #define EMS_PCMCIA_MEM_SIZE 4096 /* Size of the remapped io-memory */
63 PCMCIA_DEVICE_PROD_ID123("EMS_T_W", "CPC-Card", "V2.0", 0xeab1ea23,
[all …]
H A Dkvaser_pci.c1 // SPDX-License-Identifier: GPL-2.0-only
7 * - Kvaser linux driver, version 4.72 BETA
8 * Copyright (C) 2002-2007 KVASER AB
10 * - Lincan driver, version 0.3.3, OCERA project
14 * - Socketcan SJA1000 drivers
16 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
35 MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
43 struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
54 * RX1 is connected to ground.
55 * TX1 is not connected.
[all …]
H A Dems_pci.c1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2008 Markus Plessing <plessing@ems-wuensche.com>
5 * Copyright (C) 2008 Sebastian Haas <haas@ems-wuensche.com>
23 MODULE_AUTHOR("Sebastian Haas <support@ems-wuensche.com>");
24 MODULE_AUTHOR("Gerhard Uttenthaler <uttenthaler@ems-wuensche.com>");
25 MODULE_DESCRIPTION("Socket-CAN driver for EMS CPC-PCI/PCIe/104P CAN cards");
48 * PSB4610 PITA-2 bridge control registers
76 * RX1 is connected to ground.
77 * TX1 is not connected.
78 * CLKO is not connected.
[all …]
/linux/drivers/gpio/
H A Dgpio-bd71815.c1 // SPDX-License-Identifier: GPL-2.0
8 * Author: yanglsh@embest-tech.com
18 #include <linux/mfd/rohm-bd71815.h>
33 ret = regmap_read(bd71815->regmap, BD71815_REG_GPO, &val); in bd71815gpo_get()
49 ret = regmap_set_bits(bd71815->regmap, BD71815_REG_GPO, bit); in bd71815gpo_set()
51 ret = regmap_clear_bits(bd71815->regmap, BD71815_REG_GPO, bit); in bd71815gpo_set()
54 dev_warn(bd71815->dev, "failed to toggle GPO\n"); in bd71815gpo_set()
64 return regmap_update_bits(bdgpio->regmap, in bd71815_gpio_set_config()
69 return regmap_update_bits(bdgpio->regmap, in bd71815_gpio_set_config()
76 return -ENOTSUPP; in bd71815_gpio_set_config()
[all …]
/linux/drivers/mfd/
H A Ducb1x00-ts.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Touchscreen driver for UCB1x00-based touchscreens
8 * 21-Jan-2002 <jco@ict.es> :
13 * It is important to note that the signal connected to the ADCSYNC
34 #include <asm/mach-types.h>
56 struct input_dev *idev = ts->idev; in ucb1x00_ts_evt_add()
67 struct input_dev *idev = ts->idev; in ucb1x00_ts_event_release()
79 ucb1x00_reg_write(ts->ucb, UCB_TS_CR, in ucb1x00_ts_mode_int()
92 ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); in ucb1x00_ts_read_pressure()
93 ucb1x00_reg_write(ts->ucb, UCB_TS_CR, in ucb1x00_ts_read_pressure()
[all …]
/linux/Documentation/driver-api/
H A Dedac.rst5 ----------------------------------------
8 *sockets, *socket sets*, *banks*, *rows*, *chip-select rows*, *channels*,
13 creating a common ground for discussion, terms and their definitions
43 It is typically the highest hierarchy on a Fully-Buffered DIMM memory
52 * Single-channel
55 only. E. g. if the data is 64 bits-wide, the data flows to the CPU using
57 memories. FB-DIMM and RAMBUS use a different concept for channel, so
60 * Double-channel
63 dimms, accessed at the same time. E. g. if the DIMM is 64 bits-wide (72
67 * Chip-select row
[all …]
/linux/drivers/leds/flash/
H A Dleds-rt8515.c1 // SPDX-License-Identifier: GPL-2.0-or-later
10 * from the RT8515 to the LED, with two resistors connected
11 * from the pins "RFS" and "RTS" to ground.
28 #include <linux/led-class-flash.h>
35 #include <media/v4l2-flash-led-class.h>
37 /* We can provide 15-700 mA out to the LED */
40 /* The maximum intensity is 1-16 for flash and 1-100 for torch */
68 gpiod_set_value(rt->enable_flash, 0); in rt8515_gpio_led_off()
69 gpiod_set_value(rt->enable_torch, 0); in rt8515_gpio_led_off()
96 mutex_lock(&rt->lock); in rt8515_led_brightness_set()
[all …]
/linux/Documentation/devicetree/bindings/phy/
H A Dnvidia,tegra20-usb-phy.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/phy/nvidia,tegra20-usb-phy.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Dmitry Osipenko <digetx@gmail.com>
11 - Jon Hunter <jonathanh@nvidia.com>
12 - Thierry Reding <thierry.reding@gmail.com>
17 - items:
18 - enum:
19 - nvidia,tegra124-usb-phy
[all …]
/linux/Documentation/devicetree/bindings/net/wireless/
H A Dmediatek,mt76.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 # Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Felix Fietkau <nbd@nbd.name>
12 - Lorenzo Bianconi <lorenzo@kernel.org>
13 - Ryder Lee <ryder.lee@mediatek.com>
18 node of the PCI controller to which the wireless chip is connected.
25 - mediatek,mt76
26 - mediatek,mt7628-wmac
[all …]
/linux/include/linux/pinctrl/
H A Dpinconf-generic.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2011 ST-Ericsson SA
6 * Written on behalf of Linaro for ST-Ericsson
24 * enum pin_config_param - possible pin configuration parameters
31 * transition from say pull-up to pull-down implies that you disable
32 * pull-up in the process, this setting disables all biasing.
34 * mode, also know as "third-state" (tristate) or "high-Z" or "floating".
36 * if for example some other pin is going to drive the signal connected
40 * impedance to GROUND). If the argument is != 0 pull-down is enabled,
52 * impedance to VDD). If the argument is != 0 pull-up is enabled,
[all …]
/linux/drivers/input/misc/
H A Daxp20x-pek.c96 ret = regmap_read(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY, &val); in axp20x_show_attr()
101 val >>= ffs(mask) - 1; in axp20x_show_attr()
116 return axp20x_show_attr(dev, axp20x_pek->info->startup_time, in axp20x_show_attr_startup()
117 axp20x_pek->info->startup_mask, buf); in axp20x_show_attr_startup()
126 return axp20x_show_attr(dev, axp20x_pek->info->shutdown_time, in axp20x_show_attr_shutdown()
127 axp20x_pek->info->shutdown_mask, buf); in axp20x_show_attr_shutdown()
144 for (i = 3; i >= 0; i--) { in axp20x_store_attr()
147 err = abs(time[i].time - val); in axp20x_store_attr()
157 idx <<= ffs(mask) - 1; in axp20x_store_attr()
158 ret = regmap_update_bits(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY, in axp20x_store_attr()
[all …]

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