Lines Matching +full:first +full:- +full:data +full:- +full:gpios
7 Documentation/ABI/obsolete/sysfs-gpio AND NEW USERSPACE CONSUMERS
16 ------------------------
18 configure a sysfs user interface to GPIOs. This is different from the
26 may need to temporarily remove that protection, first importing a GPIO,
27 then changing its output state, then updating the code before re-enabling
32 userspace GPIO can be used to determine system configuration data that
37 PLEASE READ THE DOCUMENT AT Documentation/driver-api/gpio/drivers-on-gpio.rst
41 --------------
44 - Control interfaces used to get userspace control over GPIOs;
46 - GPIOs themselves; and
48 - GPIO controllers ("gpio_chip" instances).
52 The control interfaces are write-only:
91 If the pin can be configured as interrupt-generating interrupt
98 file and read the new value or close the file and re-open it
118 controller implementing GPIOs starting at #42) and have the following
119 read-only attributes:
124 same as N, the first GPIO managed by this chip
130 how many GPIOs this manages (N to N + ngpio - 1)
132 Board documentation should in most cases cover what GPIOs are used for
133 what purposes. However, those numbers are not always stable; GPIOs on
141 --------------------------
142 Kernel code can explicitly manage exports of GPIOs which have already been
161 of experiments easier), or can provide an always-there interface that's