ARM: pxa: remove unused mach/bitfield.h

The sa1111.h header defines some constants using the bitfield
macros, but those are only used on sa1100, not on pxa, and the
users include the bitfield header through mach/hardware.h.

Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

ARM: 9048/1: sa1111: make sa1111 bus's remove callback return void

The driver core ignores the return value of struct device_driver::remove
because there is only little that can be done. To simplify the quest to
make this function return void, let struct sa1111_driver::remove return
void, too. All users already unconditionally return 0, this commit makes
it obvious that returning an error code is a bad idea and ensures future
users behave accordingly.

Link: https://lore.kernel.org/r/20201126114724.2028511-1-u.kleine-koenig@pengutronix.de
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: remove legacy GPIO interfaces

Now that we have migrated all users of the legacy private SA1111 gpio
interfaces, we can remove these redundant GPIO interfaces.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: map interrupt numbers through irqdomain

Map the interrupt numbers for SA1111 through the SA1111 IRQ domain
rather than doing our own translation. This allows us to eliminate
the irq_base sachip member.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: remove some redundant definitions

SA1111_VBASE, SA1111_p2v, SA1111_v2p, _SA1111, SA1111_ADDR_WIDTH,
SA1111_ADDR_MASK, and SA1111_DMA_ADDR are not used anywhere in the
kernel, so remove these redundant definitions.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: remove special sa1111 mmio accessors

Remove the special sa1111 mmio accessors from core sa1111 code, and
their definition in sa1111.h now that all users are gone.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: remove legacy suspend/resume methods

The legacy device-driver suspend/resume methods are not used by any of
our drivers, so let's remove this redundant code.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: remove legacy shutdown method

Since the only user of the SA1111 device driver shutdown method has now
gone, we can kill the bus level support code and the entry in the
sa1111 device driver structure.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.

For non */uapi/* files that summary was:

SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139

and resulted in the first patch in this series.

If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:

SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930

and resulted in the second patch in this series.

- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:

SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1

and that resulted in the third patch in this series.

- when the two scanners agreed on the detected license(s), that became
the concluded license(s).

- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.

- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).

- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.

- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct

This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ARM: sa1111: provide to_sa1111_device() macro

Provide a nicer to_sa1111_device macro to convert a struct device to a
sa1111_dev. We will need this for drivers when converting them to
dev_pm_ops, or removing shutdown methods.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: add sa1111_get_irq()

Add a helper function to get the irq number for a device.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

ARM: sa1111: move USB interface register definitions to ohci-sa1111.c

Move the USB interface register definitions into the driver, rather
than keeping them in a common place.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: move PCMCIA interface register definitions to sa1111_generic.c

Move the PCMCIA interface register definitions into the driver, rather
than keeping them in a common place.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: move PS/2 interface register definitions to sa1111p2.c

Move the PS/2 interface register definitions into the driver, rather
than keeping them in a common location.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: delete unused physical GPIO register definitions

Get rid of the unused GPIO register definitions - we access GPIO
registers through the base + offset method, and having the phys
address definitions is unnecessary duplication.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: provide a generic way to prevent devices from registering

Some platforms don't want certain devices to be registered, because,
eg, the interface is not wired. Provide a way for platforms to
prevent various devices from being registered via a devid bitmask in
the platform data.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: change devid to be a bitmask

Change the sa1111 device id to be a bitmask. This allows us to
specify the actual device, while allowing a single driver to bind
to both PS2 devices.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: add platform enable/disable functions

Add platform hooks to be called when individual sa1111 devices are
enabled and disabled. This will allow us to move some platform
specifics out of the individual drivers.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: sa1111: add shutdown hook to sa1111_driver structure

Add a shutdown hook to the sa1111_driver structure to allow drivers
to be notified of system reboots and shutdowns.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

[ARM] sa1111: allow cascaded IRQs to be used by platforms

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach

This just leaves include/asm-arm/plat-* to deal with.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

[ARM] move include/asm-arm to arch/arm/include/asm

Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/plat* alone.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>