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GPIO_CLX_UnregisterClient function (gpioclx.h)

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The GPIO_CLX_UnregisterClient method removes a general-purpose I/O (GPIO) controller driver's registration with the GPIO framework extension (GpioClx).

Syntax

NTSTATUS GPIO_CLX_UnregisterClient(
  [in] WDFDRIVER Driver
);

Parameters

[in] Driver

A WDFDRIVER handle to the framework driver object for the GPIO controller driver.

Return value

GPIO_CLX_UnregisterClient returns STATUS_SUCCESS if the call is successful. Possible return values include the following error code.

Return code Description
STATUS_NOT_FOUND
 The caller is not a registered client of GpioClx.

Remarks

A GPIO controller driver calls this method to cancel its registration. The driver registered in a previous call to the GPIO_CLX_RegisterClient method.

Typically, the GPIO controller driver calls this method from its EvtDriverUnload event callback function, which runs shortly before the driver unloads.

Requirements

Requirement Value
Minimum supported client Available starting with Windows 8.
Target Platform Universal
Header gpioclx.h
Library Msgpioclxstub.lib
IRQL PASSIVE_LEVEL

See also

EvtDriverUnload

GPIO_CLX_RegisterClient