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/openbmc/u-boot/doc/device-tree-bindings/w1/
H A Dw1-gpio.txt1 W1 gpio device binding - one wire protocol over bitbanged gpio
9 Also check doc/device-tree-bindings/w1-eeprom for possible child nodes drivers
12 - drivers/w1/w1-gpio.c
14 Software w1 device-tree node properties:
16 * compatible = "w1-gpio";
18 This is the gpio used for one wire protocol, using bitbanging
26 compatible = "w1-gpio";
33 compatible = "w1-gpio";
/openbmc/linux/Documentation/w1/masters/
H A Dw1-gpio.rst2 Kernel driver w1-gpio
9 -----------
11 GPIO 1-wire bus master driver. The driver uses the GPIO API to control the
12 wire and the GPIO pin can be specified using GPIO machine descriptor tables.
14 Documentation/devicetree/bindings/w1/w1-gpio.yaml
17 Example (mach-at91)
18 -------------------
22 #include <linux/gpio/machine.h>
23 #include <linux/w1-gpio.h>
26 .dev_id = "w1-gpio",
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H A Dindex.rst1 . SPDX-License-Identifier: GPL-2.0
4 1-wire Master Drivers
12 mxc-w1
13 omap-hdq
14 w1-gpio
/openbmc/linux/Documentation/devicetree/bindings/w1/
H A Dw1-gpio.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/w1/w1-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Bitbanged GPIO 1-Wire Bus
10 - Daniel Mack <zonque@gmail.com>
14 const: w1-gpio
19 - description: Data I/O pin
20 - description: Enable pin for an external pull-up resistor
22 linux,open-drain:
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H A Dw1.txt1 Generic devicetree bindings for onewire (w1) busses
5 Slave devices are listed as sub-nodes of such master devices. For now, only
12 compatible = "gpio-charger";
13 charger-type = "mains";
14 gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
18 compatible = "w1-gpio";
19 gpios = <&gpio 100 0>, <&gpio 101 0>;
23 power-supplies = <&charger>;
/openbmc/linux/drivers/w1/masters/
H A Dw1-gpio.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * w1-gpio - GPIO w1 bus master driver
12 #include <linux/w1-gpio.h>
13 #include <linux/gpio/consumer.h>
19 #include <linux/w1.h>
26 pdata->pullup_duration = delay; in w1_gpio_set_pullup()
28 if (pdata->pullup_duration) { in w1_gpio_set_pullup()
30 * This will OVERRIDE open drain emulation and force-pull in w1_gpio_set_pullup()
33 gpiod_set_raw_value(pdata->gpiod, 1); in w1_gpio_set_pullup()
34 msleep(pdata->pullup_duration); in w1_gpio_set_pullup()
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H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # 1-wire bus master configuration
6 menu "1-wire Bus Masters"
9 tristate "Matrox G400 transport layer for 1-wire"
12 Say Y here if you want to communicate with your 1-wire devices
13 using Matrox's G400 GPIO pins.
19 tristate "DS2490 USB <-> W1 transport layer for 1-wire"
22 Say Y here if you want to have a driver for DS2490 based USB <-> W1 bridges,
29 tristate "Maxim DS2482 I2C to 1-Wire bridge"
33 I2C to 1-Wire bridge.
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H A DMakefile1 # SPDX-License-Identifier: GPL-2.0
3 # Makefile for 1-wire bus master drivers.
6 obj-$(CONFIG_W1_MASTER_MATROX) += matrox_w1.o
7 obj-$(CONFIG_W1_MASTER_DS2490) += ds2490.o
8 obj-$(CONFIG_W1_MASTER_DS2482) += ds2482.o
9 obj-$(CONFIG_W1_MASTER_MXC) += mxc_w1.o
11 obj-$(CONFIG_W1_MASTER_GPIO) += w1-gpio.o
12 obj-$(CONFIG_HDQ_MASTER_OMAP) += omap_hdq.o
13 obj-$(CONFIG_W1_MASTER_SGI) += sgi_w1.o
/openbmc/linux/Documentation/driver-api/gpio/
H A Ddrivers-on-gpio.rst2 Subsystem drivers using GPIO
5 Note that standard kernel drivers exist for common GPIO tasks and will provide
6 the right in-kernel and userspace APIs/ABIs for the job, and that these
10 - leds-gpio: drivers/leds/leds-gpio.c will handle LEDs connected to GPIO
13 - ledtrig-gpio: drivers/leds/trigger/ledtrig-gpio.c will provide a LED trigger,
14 i.e. a LED will turn on/off in response to a GPIO line going high or low
15 (and that LED may in turn use the leds-gpio as per above).
17 - gpio-keys: drivers/input/keyboard/gpio_keys.c is used when your GPIO line
20 - gpio-keys-polled: drivers/input/keyboard/gpio_keys_polled.c is used when your
21 GPIO line cannot generate interrupts, so it needs to be periodically polled
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/openbmc/u-boot/drivers/w1/
H A DKconfig2 # W1 subsystem configuration
5 menu "1-Wire support"
7 config W1 config
8 bool "Enable 1-wire controllers support"
12 Support for the Dallas 1-Wire bus.
14 if W1
17 bool "Enable 1-wire GPIO bitbanging"
21 Emulate a 1-wire bus using a GPIO.
24 bool "Enable 1-wire controller on i.MX processors"
H A DMakefile1 obj-$(CONFIG_W1) += w1-uclass.o
3 obj-$(CONFIG_W1_GPIO) += w1-gpio.o
4 obj-$(CONFIG_W1_MXC) += mxc_w1.o
H A Dw1-gpio.c1 /* SPDX-License-Identifier: GPL-2.0+
6 * Maxime Ripard <maxime.ripard@free-electrons.com>
12 #include <w1.h>
14 #include <asm/gpio.h>
28 struct gpio_desc gpio; member
37 dm_gpio_set_dir_flags(&pdata->gpio, GPIOD_IS_OUT); in w1_gpio_read_bit()
40 dm_gpio_set_dir_flags(&pdata->gpio, GPIOD_IS_IN); in w1_gpio_read_bit()
43 val = dm_gpio_get_value(&pdata->gpio); in w1_gpio_read_bit()
45 debug("error in retrieving GPIO value"); in w1_gpio_read_bit()
66 dm_gpio_set_dir_flags(&pdata->gpio, GPIOD_IS_OUT); in w1_gpio_write_bit()
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/openbmc/u-boot/doc/device-tree-bindings/w1-eeprom/
H A Deep_sandbox.txt1 Onewire EEPROM sandbox driver device binding - one wire protocol sandbox EEPROM
7 Also check doc/device-tree-bindings/w1 for onewire bus drivers
10 - drivers/w1-eeprom/eep_sandbox.c
12 Software ds24xxx device-tree node properties:
14 * compatible = "sandbox,w1-eeprom"
21 compatible = "sandbox,w1-eeprom";
27 compatible = "w1-gpio";
31 compatible = "sandbox,w1-eeprom";
H A Dds24xxx.txt1 Maxim DS24 families driver device binding - one wire protocol EEPROMS from Maxim
7 Also check doc/device-tree-bindings/w1 for onewire bus drivers
10 - drivers/w1-eeprom/ds24xxx.c
12 Software ds24xxx device-tree node properties:
30 compatible = "w1-gpio";
/openbmc/u-boot/drivers/w1-eeprom/
H A Deep_sandbox.c1 /* SPDX-License-Identifier: GPL-2.0+
10 #include <w1-eeprom.h>
11 #include <w1.h>
28 * in case the w1 subsystem uses some different kind of sandbox testing, in eep_sandbox_read_buf()
29 * like randomized gpio values , we take the buffer from there in eep_sandbox_read_buf()
41 * even if read buf from w1 fails, return success as we hardcoded in eep_sandbox_read_buf()
52 { .compatible = "sandbox,w1-eeprom", .data = W1_FAMILY_EEP_SANDBOX },
/openbmc/linux/include/linux/
H A Dw1-gpio.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * w1-gpio interface to platform code
13 * struct w1_gpio_platform_data - Platform-dependent data for w1-gpio
/openbmc/u-boot/arch/sandbox/dts/
H A Dsandbox.dts1 /dts-v1/;
6 #address-cells = <1>;
7 #size-cells = <1>;
18 stdout-path = "/serial";
21 audio: audio-codec {
22 compatible = "sandbox,audio-codec";
23 #sound-dai-cells = <1>;
26 cros_ec: cros-ec {
28 u-boot,dm-pre-reloc;
29 compatible = "google,cros-ec-sandbox";
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/openbmc/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
11 The w1 subsystem provides the framework for managing w1 masters and
14 All w1 slave devices must be connected to a w1 bus master device.
16 Example w1 master devices:
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
24 What does the w1 subsystem do?
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/openbmc/linux/arch/arm/boot/dts/intel/pxa/
H A Dpxa300-raumfeld-controller.dts1 // SPDX-License-Identifier: GPL-2.0
3 /dts-v1/;
5 #include "pxa300-raumfeld-common.dtsi"
9 compatible = "raumfeld,raumfeld-controller-pxa303", "marvell,pxa300";
11 reg_vbatt: regulator-vbatt {
12 compatible = "regulator-fixed";
13 regulator-name = "vbatt-fixed-supply";
14 regulator-min-microvolt = <3700000>;
15 regulator-max-microvolt = <3700000>;
16 regulator-always-on;
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/openbmc/u-boot/test/py/tests/
H A Dtest_pinmux.py1 # SPDX-License-Identifier: GPL-2.0
23 """Test that 'pinmux status -a' displays pin's muxing."""
24 output = u_boot_console.run_command('pinmux status -a')
29 assert ('W1 : 1-wire gpio' in output)
34 """Test that 'pinmux list' returns the pin-controller list."""
44 expected_output = 'Can\'t get the pin-controller: ' + pincontroller + '!'
66 assert ('W1 : 1-wire gpio' in output)
/openbmc/linux/arch/arm/boot/dts/aspeed/
H A Daspeed-bmc-opp-zaius.dts1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
3 #include "aspeed-g5.dtsi"
4 #include <dt-bindings/gpio/aspeed-gpio.h>
8 compatible = "ingrasys,zaius-bmc", "aspeed,ast2500";
19 stdout-path = &uart5;
27 reserved-memory {
28 #address-cells = <1>;
29 #size-cells = <1>;
33 no-map;
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/openbmc/openbmc/meta-raspberrypi/conf/machine/include/
H A Drpi-base.inc1 include conf/machine/include/rpi-default-settings.inc
2 include conf/machine/include/rpi-default-versions.inc
3 include conf/machine/include/rpi-default-providers.inc
6 include conf/machine/include/soc-family.inc
9 WKS_FILE ?= "sdimage-raspberrypi.wks"
12 xserver-xorg \
13 ${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "xserver-xorg-extension-glx", "", d)} \
14 …${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "xf86-video-modesetting", "xf86-video-fbde…
20 overlays/disable-bt.dtbo \
21 overlays/disable-bt-pi5.dtbo \
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/openbmc/u-boot/drivers/pinctrl/
H A Dpinctrl-sandbox.c1 // SPDX-License-Identifier: GPL-2.0+
17 "W1"
25 "1-wire gpio",
33 "w1",
40 "w1",
44 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
45 { "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
46 { "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
47 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
48 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
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/openbmc/u-boot/drivers/
H A DKconfig41 source "drivers/gpio/Kconfig"
123 source "drivers/w1/Kconfig"
125 source "drivers/w1-eeprom/Kconfig"
/openbmc/openbmc/meta-facebook/meta-yosemite4/recipes-phosphor/gpio/phosphor-gpio-monitor/
H A Dcheck-interrupt4 # shellcheck source=meta-facebook/meta-yosemite4/recipes-phosphor/state/phosphor-state-manager/powe…
5 source /usr/libexec/phosphor-state-manager/power-cmd
6 # shellcheck source=meta-facebook/meta-yosemite4/recipes-yosemite4/plat-tool/files/yosemite4-common…
7 source /usr/libexec/yosemite4-common-functions
9 GPIOCHIP_IO_EXP_SLOT_PWR_CTRL=$(basename "/sys/bus/i2c/devices/$SPIDER_BOARD_IO_EXP_BUS_NUM-00$IO_E…
28 …status=$(busctl get-property "$service_path" "$object_path" $interface_path $property | cut -d"." …
38 …is-powercycle@$id.service" "chassis-poweron@$id.service" "chassis-poweroff@$id.service" "host-powe…
41 status=$(systemctl is-active "$service")
51 # Sleep for 10ms to ignore GPIO instability during blade hot-plug
54 if [ "$1" = "slot1-slot4" ]; then
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