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drvctl(8) [netbsd man page]

DRVCTL(8)						    BSD System Manager's Manual 						 DRVCTL(8)

drvctl -- tool to rescan busses and detach devices on user request SYNOPSIS
drvctl -r [-a attribute] busdevice [locator ...] drvctl -d device drvctl [-nt] -l [device] drvctl [-n] -p device [property ...] drvctl -Q device drvctl -R device drvctl -S device DESCRIPTION
The drvctl program works with the drvctl(4) pseudo-driver, and allows to rescan busses and to detach drivers from devices. The following options are available: -a Give the interface attribute where children are to be attached to (and which defines the interpretation of the locator information). This will only be needed in rare cases where the bus has multiple attributes. If there are multiple attributes, and one is not spec- ified, drvctl will return an Invalid argument. In such cases, the -p option can be used to determine the available interface attributes. -d Detach the device driver from the device given by the device argument. -l List the children of the device specified by the device argument. If device is not specified, list roots of the device tree instead. Output comes in two columns. The first column is device, or ``root'' if device is not specified. The second column is the child. -n Suppress first column in -l output. Suppress non-XML headers in -p output. -p Get properties for the device specified by the device argument. If property is specified, the value of that property is printed, otherwise the properties are displayed as an XML property list. -Q Resume the ancestors of device, device itself, and all of its descendants. -R Resume both the ancestors of device and device itself. -r Rescan the bus given by the busdevice argument. The scan range can be restricted by an optional locator list. -S Suspend both the descendants of device and device itself. -t Print a tree of devices in -l output. FILES
/dev/drvctl SEE ALSO
proplib(3), autoconf(9) BUGS
Currently, there is no good way to get information about locator lengths and default values (which is present at kernel configuration time) out of a running kernel. Thus the locator handling is less intelligent than it could be. BSD
January 16, 2012 BSD

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GPIOCTL(8)						    BSD System Manager's Manual 						GPIOCTL(8)

gpioctl -- control GPIO devices SYNOPSIS
gpioctl [-q] device attach device offset mask [flag] gpioctl [-q] device pin [0 | 1 | 2] gpioctl [-q] device pin [on | off | toggle] gpioctl [-q] device pin set [flags] [name] gpioctl [-q] device pin unset DESCRIPTION
The gpioctl program allows manipulation of GPIO (General Purpose Input/Output) device pins. Such devices can be either part of the chipset or embedded CPU, or a separate chip. The usual way of using GPIO is to connect some simple devices such as LEDs and 1-wire thermal sensors to its pins. Each GPIO device has an associated device file in the /dev directory. device can be specified with or without the /dev prefix. For example, /dev/gpio0 or gpio0. GPIO pins can be either ``read'' or ``written'' with the values of logical 0 or 1. If only a pin number is specified on the command line, the pin state will be read from the GPIO controller and displayed. To write to a pin, a value must be specified after the pin number. Val- ues can be either 0 or 1. A value of 2 ``toggles'' the pin, i.e. changes its state to the opposite. Instead of the numerical values, the word on, off, or toggle can be used. To Only pins that have been configured at securelevel 0, typically during system startup, are accessible once the securelevel has been raised. Pins can be given symbolic names for easier use. Besides using individual pins, device drivers that use GPIO pins can be attached to a gpio(4) device using the gpioctl command. Such drivers can be detached at runtime using the drvctl(8) command. The following configuration flags are supported by the GPIO framework: in input direction out output direction inout bi-directional od open-drain output pp push-pull output tri tri-state (output disabled) pu internal pull-up enabled pd internal pull-down enabled iin invert input iout invert output pulsate pulsate output at a hardware-defined frequency and duty cycle Note that not all the flags may be supported by the particular GPIO controller. When executed with only the gpio(4) device name as argument, gpioctl reads information about the GPIO device and displays it. At securelevel 0 the number of physically available pins is displayed, at higher securelevels the number of configured (set) pins is displayed. The options are as follows: -q Operate quietly i.e. nothing is printed to stdout. FILES
/dev/gpiou GPIO device unit u file. EXAMPLES
Configure pin 20 to have push-pull output: # gpioctl gpio0 20 set out pp Write logical 1 to pin 20: # gpioctl gpio0 20 1 Attach a onewire(4) bus on a gpioow(4) device on pin 4: # gpioctl gpio0 attach gpioow 4 0x01 Detach the gpioow0 device: # drvctl -d gpioow0 Configure pin 5 as output and name it error_led: # gpioctl gpio0 5 set out error_led Toggle the error_led: # gpioctl gpio0 error_led 2 SEE ALSO
gpio(4), drvctl(8) HISTORY
The gpioctl command first appeared in OpenBSD 3.6 and NetBSD 4.0. AUTHORS
The gpioctl program was written by Alexander Yurchenko <>. Device attachment was added by Marc Balmer <>. BSD
November 13, 2011 BSD
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