driver core: have match() callback in struct bus_type take a const *

In the match() callback, the struct device_driver * should not be
changed, so change the function callback to be a const *. This

driver core: have match() callback in struct bus_type take a const *

In the match() callback, the struct device_driver * should not be
changed, so change the function callback to be a const *. This is one
step of many towards making the driver core safe to have struct
device_driver in read-only memory.

Because the match() callback is in all busses, all busses are modified
to handle this properly. This does entail switching some container_of()
calls to container_of_const() to properly handle the constant *.

For some busses, like PCI and USB and HV, the const * is cast away in
the match callback as those busses do want to modify those structures at
this point in time (they have a local lock in the driver structure.)
That will have to be changed in the future if they wish to have their
struct device * in read-only-memory.

Cc: Rafael J. Wysocki <[email protected]>
Reviewed-by: Alex Elder <[email protected]>
Acked-by: Sumit Garg <[email protected]>
Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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fsi: Add new central chardev support

The various FSI devices (sbefifo, occ, scom, more to come)
currently use misc devices.

This is problematic as the minor device space for misc is
limited and the

fsi: Add new central chardev support

The various FSI devices (sbefifo, occ, scom, more to come)
currently use misc devices.

This is problematic as the minor device space for misc is
limited and there can be a lot of them. Also it limits our
ability to move them to a dedicated /dev/fsi directory or
to be smart about device naming and numbering.

It also means we have IDAs on every single of these drivers

This creates a common fsi "device_type" for the optional
/dev/fsi grouping and a dev_t allocator for all FSI devices.

"Legacy" devices get to use a backward compatible numbering
scheme (as long as chip id <16 and there's only one copy
of a given unit type per chip).

A single major number and a single IDA are shared for all
FSI devices.

This doesn't convert the FSI device drivers to use the new
scheme yet, they will be converted individually.

Signed-off-by: Benjamin Herrenschmidt <[email protected]>

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drivers/fsi: expose direct-access slave API

Allow drivers to access the slave address ranges.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by:

drivers/fsi: expose direct-access slave API

Allow drivers to access the slave address ranges.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by: Christopher Bostic <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/fsi: Add client driver register utilities

Add driver_register and driver_unregister wrappers for FSI.

Signed-off-by: Christopher Bostic <[email protected]>
Signed-off-by: Joel Stan

drivers/fsi: Add client driver register utilities

Add driver_register and driver_unregister wrappers for FSI.

Signed-off-by: Christopher Bostic <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/fsi: Add device read/write/peek API

This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.

Includes contributions from Christopher

drivers/fsi: Add device read/write/peek API

This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.

Includes contributions from Christopher Bostic
<[email protected]> and Edward A. James <[email protected]>.

Signed-off-by: Edward A. James <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Christopher Bostic <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/fsi: scan slaves & register devices

Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.

Includes contributions from Christopher Bostic
<cbostic@li

drivers/fsi: scan slaves & register devices

Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.

Includes contributions from Christopher Bostic
<[email protected]>.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Christopher Bostic <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/fsi: add driver to device matches

Driver bind to devices based on the engine types & (optional) versions.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Chris Bostic <cbostic@us.

drivers/fsi: add driver to device matches

Driver bind to devices based on the engine types & (optional) versions.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Chris Bostic <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/fsi: Add device & driver definitions

Add structs for fsi devices & drivers, and struct device conversion
functions.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Chris Bostic <c

drivers/fsi: Add device & driver definitions

Add structs for fsi devices & drivers, and struct device conversion
functions.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Chris Bostic <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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drivers/fsi: Add empty fsi bus definitions

This change adds the initial (empty) fsi bus definition, and introduces
drivers/fsi/.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Chris Bost

drivers/fsi: Add empty fsi bus definitions

This change adds the initial (empty) fsi bus definition, and introduces
drivers/fsi/.

Signed-off-by: Jeremy Kerr <[email protected]>
Signed-off-by: Chris Bostic <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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