PLATFORM_DRIVER_PROB(9) Device drivers infrastructure PLATFORM_DRIVER_PROB(9)NAME
platform_driver_probe - register driver for non-hotpluggable device
SYNOPSIS
int platform_driver_probe(struct platform_driver * drv, int (*probe) (struct platform_device *));
ARGUMENTS
drv
platform driver structure
probe
the driver probe routine, probably from an __init section, must not return -EPROBE_DEFER.
DESCRIPTION
Use this instead of platform_driver_register when you know the device is not hotpluggable and has already been registered, and you want to
remove its run-once probe infrastructure from memory after the driver has bound to the device.
One typical use for this would be with drivers for controllers integrated into system-on-chip processors, where the controller devices have
been configured as part of board setup.
This is incompatible with deferred probing so probe must not return -EPROBE_DEFER.
Returns zero if the driver registered and bound to a device, else returns a negative error code and with the driver not registered.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 PLATFORM_DRIVER_PROB(9)
Check Out this Related Man Page
probe(9E) Driver Entry Points probe(9E)NAME
probe - determine if a non-self-identifying device is present
SYNOPSIS
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
static intprefixprobe(dev_info_t *dip);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). This entry point is required for non-self-identifying devices. You must write it for such devices. For
self-identifying devices, nulldev(9F) should be specified in the dev_ops(9S) structure if a probe routine is not necessary.
ARGUMENTS
dip Pointer to the device's dev_info structure.
DESCRIPTION
probe() determines whether the device corresponding to dip actually exists and is a valid device for this driver. probe() is called after
identify(9E) and before attach(9E) for a given dip. For example, the probe() routine can map the device registers using ddi_map_regs(9F)
then attempt to access the hardware using ddi_peek(9F) or ddi_poke(9F) and determine if the device exists. Then the device registers
should be unmapped using ddi_unmap_regs(9F).
To probe a device that was left powered off after the last detach(), it might be necessary to power it up. If so, the driver must power up
the device by accessing device registers directly. pm_raise_power(9F) will be not be available until attach(9E). The framework ensures that
the ancestors of the node being probed and all relevant platform-specific power management hardware is at full power at the time that
probe() is called.
probe() should only probe the device. It should not change any software state and should not create any software state. Device initializa-
tion should be done in attach(9E).
For a self-identifying device, this entry point is not necessary. However, if a device exists in both self-identifying and non-self-identi-
fying forms, a probe() routine can be provided to simplify the driver. ddi_dev_is_sid(9F) can then be used to determine whether probe()
needs to do any work. See ddi_dev_is_sid(9F) for an example.
RETURN VALUES
DDI_PROBE_SUCCESS If the probe was successful.
DDI_PROBE_FAILURE If the probe failed.
DDI_PROBE_DONTCARE If the probe was unsuccessful, yet attach(9E) should still be called.
DDI_PROBE_PARTIAL If the instance is not present now, but may be present in the future.
SEE ALSO attach(9E), identify(9E), ddi_dev_is_sid(9F), ddi_map_regs(9F), ddi_peek(9F), ddi_poke(9F), nulldev(9F), dev_ops(9S)
Writing Device Drivers
SunOS 5.11 18 Nov 1992 probe(9E)
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