Linux kernel source tree. Contribute to torvalds/linux development by creating an account on GitHub.
2018-10-11 · This allows nonexclusive (simultaneous) access to a single GPIO line for the fixed regulator enable line. This happens when several regulators use the same GPIO for enabling and disabling a regulator and all need a handle on their GPIO descriptor. This solution with a special flag is not entirely elegant and should ideally be replaced by something
2021-6-5 · Yes you can supply 5v on the GPIO pin. BUT it has no backward protection and it was not really designed to be a 5volt input pin. the 3.3v pin can also be powered with 3.3v as the regulator has build in protection- but again it leaves your BCM unprotected Typically any power pins on GPIO area are used to power extended circuits.
2017-4-24 · Digi Embedded Yocto provides the example application gpio_sysfs_test for accessing the GPIOs via sysfs thorugh the package dey-examples-gpio-sysfs. The gpio_sysfs_test application configures an input pin (preferably a push button) and output pin (preferably an LED) and toggles the output on each press of the push button. It also configures the
2015-3-20 · Linux Regulator Framework(1)_ wowo 2015-3-20 21 42 1. Regulator "" voltage regulator current regulator
2016-10-14 · The regulator core seems capable of enabling multiple regulators by just one GPIO. It s the fixed regulator driver that is using GPIO resource control that s the road block. This is discussed in this Linux ARM kernel thread.
2019-11-5 · GPIO sysfs interface sysfs shell linux 4.8gpiod Since linux 4.8 the GPIO sysfs interface is deprecated. User space should use the character device instead
2018-4-24 · I want to use GPIO to enable regulator in device tree as shown below. gpio_reg gpio_reg compatible = "regulator-fixed" regulator-name = "gpio_reg" gpio = < tlmm_pinmux 23 0> regulator-min-microvolt = <1800000> regulatot-max-microvolt = <1800000> enable-active-high status = "ok" but i dont see any GPIO toggling happening on gpio23. if i
2020-3-5 · Linux fixed-regulator is a driver to control the gpio State to be able to be controlled from another driver to enable disable gpio. In my case I have to configure sdhci driver to use this fixed regulator driver to control the fixed regulator to enable/disable the external module. Do you have any idea on haw to use it Thanks.
2019-11-5 · GPIO sysfs interface sysfs shell linux 4.8gpiod Since linux 4.8 the GPIO sysfs interface is deprecated. User space should use the character device instead
2017-3-23 · gpio = of_get_named_gpio(node "reset-gpios" index) dtsgpio gpio index indexgpio gpio = of_get_gpio(node index)
- regulator-type Specifies what is being regulated must be either "voltage" or "current" defaults to current. Any property defined as part of the core regulator binding defined in regulator.txt can also be used. Example mmciv gpio-regulator compatible = "regulator-gpio" regulator-name = "mmci-gpio-supply" regulator-min-microvolt
2020-3-5 · Linux fixed-regulator is a driver to control the gpio State to be able to be controlled from another driver to enable disable gpio. In my case I have to configure sdhci driver to use this fixed regulator driver to control the fixed regulator to enable/disable the external module. Do you have any idea on haw to use it Thanks.
2019-11-5 · GPIO sysfs interface sysfs shell linux 4.8gpiod Since linux 4.8 the GPIO sysfs interface is deprecated. User space should use the character device instead
2017-3-23 · gpio = of_get_named_gpio(node "reset-gpios" index) dtsgpio gpio index indexgpio gpio = of_get_gpio(node index)
2018-2-6 · LoPy4 GPIO pins and LDO regulator. This topic has been deleted. Only users with topic management privileges can see it. There is previous mention that the LoPy module with deep sleep adapter takes control of the internal LDO regulator to change ECO mode or operating voltage using one of the GPIO lines. Does the LoPy4 use any GPIO lines to
- regulator-type Specifies what is being regulated must be either "voltage" or "current" defaults to current. Any property defined as part of the core regulator binding defined in regulator.txt can also be used. Example mmciv gpio-regulator compatible = "regulator-gpio" regulator-name = "mmci-gpio-supply" regulator-min-microvolt
2021-7-8 · GPIO bank gpiochip_add . Firefly-RK3399 GPIO . TP_RST (GPIO0_B4) LCD_RST (GPIO4_D5) GPIO GPIO
2021-7-8 · GPIO bank gpiochip_add . Firefly-RK3399 GPIO . TP_RST (GPIO0_B4) LCD_RST (GPIO4_D5) GPIO GPIO
2016-11-10 · regulator gpio properly check return value of of_get_named_gpio. Message ID. 20161110092129.2203-1-jszhang marvell ( mailing list archive) State. New archived.
2015-8-3 · The GPIO pin is not read for "enable control" but has its value set in regulator_ena_gpio_ctrl () in order to actively enable or disable the (external) regulator. The inablity to export the same GPIO pin using sysfs when that pin is also declared in the Device Tree is easily explained. Once the driver acquires the specified GPIO for its use
2015-3-20 · Linux Regulator Framework(1)_ wowo 2015-3-20 21 42 1. Regulator "" voltage regulator current regulator
2016-6-7 · Use 3.3V regulator on 5V rail with GPIO. Ask Question Asked 5 years 1 month ago. Active 5 years 1 month ago. Viewed 2k times 4 I would like to run a the LD1117H linear 3.3V regulator on my Pi s 5V rail in order to provide more current than the 50mA that the onboard 3.3V rail provides. My concern is that this is not entirely safe when using
2015-8-4 · The answer to "Will this GPIO provide a less reliable power source" than a regulator is Yes but just how reliable it needs to be is dependent on the load. If your load is switching then there will be noise on the GPIO source (because it has a relatively high resistance). This noise is generated by the changes in current (due to things
2019-7-3 · Android Linux regulatorGPIOIC GPIOIC SDMMC0_PWR_H pin CPUGPIO0_A1 sdenable
2021-5-14 · the GPIO and fixed regulator in device-tree should match the hardware design. Hi As I said that "the GPIO and fixed regulator in device-tree should match the hardware design." I cannot just pick any GPIO and put it there. I checked devkit schematic there is NO GPIO for enable/disable the power of fan. The fan s power is VDD_5V which is
2021-7-8 · GPIO bank gpiochip_add . Firefly-RK3399 GPIO . TP_RST (GPIO0_B4) LCD_RST (GPIO4_D5) GPIO GPIO
2011-10-5 · regulator Add driver for gpio-controlled regulators. Liam Girdwood
2018-4-10 · 1 GPIO controlled regulators 2 3 Required properties 4compatible Must be "regulator-gpio". 5states Selection of available voltages and GPIO configs. 6 if there are no states then use a fixed regulator 7 8 Optional properties 9enable-gpio GPIO to use to enable/disable the regulator. 10 - gpios GPIO group used to control voltage.
if there are no states then use a fixed regulator Optional properties enable-gpio GPIO to use to enable/disable the regulator.gpios GPIO group used to control voltage.gpios-states gpios pin s initial states array. 0 LOW 1 HIGH.
GPIO pins can be configured as either general-purpose input general-purpose output or as one of up to six special alternate settings the functions of which are pin-dependent. There are three GPIO banks on BCM2835. Each of the three banks has its own VDD input pin. On Raspberry Pi all GPIO banks are supplied from 3.3V.
2011-10-5 · regulator Add driver for gpio-controlled regulators. Liam Girdwood
2016-11-10 · regulator gpio properly check return value of of_get_named_gpio. Message ID. 20161110092129.2203-1-jszhang marvell ( mailing list archive) State. New archived.
2018-2-12 · internal regulator the voltage that they output is well within the operating voltage range of devices such as the LPV821. This technique of using GPIO pins to power devices is only possible with low power devices. With a quiescent current of 650nA s the LPV821 is seen as a minimal load to the GPIO
- regulator-type Specifies what is being regulated must be either "voltage" or "current" defaults to current. Any property defined as part of the core regulator binding defined in regulator.txt can also be used. Example mmciv gpio-regulator compatible = "regulator-gpio" regulator-name = "mmci-gpio-supply" regulator-min-microvolt
2019-3-8 · 2.643132 fan53555-regulator 0-0040 lookup for GPIO vsel failed 2.701203 fan53555-regulator 0-0040 Failed to get chip ID 2.701697 fan53555-regulator 0-0041 GPIO lookup for consumer vsel 2.701706 fan53555-regulator 0-0041 using device tree for GPIO lookup
2019-3-8 · 2.643132 fan53555-regulator 0-0040 lookup for GPIO vsel failed 2.701203 fan53555-regulator 0-0040 Failed to get chip ID 2.701697 fan53555-regulator 0-0041 GPIO lookup for consumer vsel 2.701706 fan53555-regulator 0-0041 using device tree for GPIO lookup
2019-3-8 · 2.643132 fan53555-regulator 0-0040 lookup for GPIO vsel failed 2.701203 fan53555-regulator 0-0040 Failed to get chip ID 2.701697 fan53555-regulator 0-0041 GPIO lookup for consumer vsel 2.701706 fan53555-regulator 0-0041 using device tree for GPIO lookup
2021-6-28 · # gpio_sysfs_test Usage gpio-sysfs-test
2021-7-14 · Regulator. The M8 connector supplies 5V at 370 mA and can be turned on and off using the CAN_PWR GPIO. There is a boost converter on the Tracker SoM and 5V is available off battery as well as USB and external VIN power. Since the nRF52840 MCU only supports 3.3V logic levels on I2C Serial and GPIO a 3.3V regulator is often required.
2019-12-5 · Android Linux regulatorGPIOIC. GPIOIC SDMMC0_PWR_H pin CPUGPIO0_A1 sdenabledisable . dts . . regulator_enable regulator_disableGPIO0_A1
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