syscon: Move syscon code in dev/syscon

We've removed kernel option EXT_RESOURCES almost two years ago.
While it was ok to have some code under a common 'extres' subdirectory
at first, we now have a

syscon: Move syscon code in dev/syscon

We've removed kernel option EXT_RESOURCES almost two years ago.
While it was ok to have some code under a common 'extres' subdirectory
at first, we now have a lot of consumer of it and we made it mandatory
so no need to have it under a cryptic name.

Reviewed by: mhorne
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D43196

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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extres: syscon: pull in sys/malloc.h (fix !FDT)

syscon currently includes sys/malloc.h via header pollution from
dev/ofw/ofw_bus.h -> dev/ofw/openfirm.h. Fix the build without FDT
defined by includ

extres: syscon: pull in sys/malloc.h (fix !FDT)

syscon currently includes sys/malloc.h via header pollution from
dev/ofw/ofw_bus.h -> dev/ofw/openfirm.h. Fix the build without FDT
defined by including sys/malloc.h directly.

Reviewed by: andrew, imp, manu
Differential Revision: https://reviews.freebsd.org/D36787

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syscon: Add syscon_get_by_ofw_node

This allow to get a syscon node defined under a specific fdt node (which isn't
always the device one).

Refine locking inside of syscon driver.
In some cases, the syscon driver may be used by consumer requiring better
control about locking (ie. it may be used as registe file provider for clock
driver w

Refine locking inside of syscon driver.
In some cases, the syscon driver may be used by consumer requiring better
control about locking (ie. it may be used as registe file provider for clock
driver which needs locked access to multiple registers).
Add fine locking protocol methods together with bunch of helper functions
in syscon driver and implement this functionality in syscon_generic driver.

MFC after: 4 weeks

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Add method for getting of syscon handle from parent device.

If simple multifuction device also provides syscon interface, its
childern should be able to consume it. Due to this:
- declare corespondi

Add method for getting of syscon handle from parent device.

If simple multifuction device also provides syscon interface, its
childern should be able to consume it. Due to this:
- declare coresponding method in syscon interface
- implement it in simple multifunction device driver

MFC after: 1 week

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extres: Unify error codes for <foo>_get_by_ofw_property() methods.
Return:
- ENOENT if requested property doesn't exist
- ENODEV if producer device is not (yet) attached
- ENXIO otherwise

MFC aft

extres: Unify error codes for <foo>_get_by_ofw_property() methods.
Return:
- ENOENT if requested property doesn't exist
- ENODEV if producer device is not (yet) attached
- ENXIO otherwise

MFC after: 2 weeks

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Remove "All Rights Reserved" on files that I hold sole copyright on

See r333391 for more detail; in summary: it holds no weight and may be
removed.

Align OF_getencprop_alloc API with OF_getencprop and OF_getprop_alloc

Change OF_getencprop_alloc semantics to be combination of malloc and
OF_getencprop and return size of the property, not number o

Align OF_getencprop_alloc API with OF_getencprop and OF_getprop_alloc

Change OF_getencprop_alloc semantics to be combination of malloc and
OF_getencprop and return size of the property, not number of elements
allocated.

For the use cases where number of elements is preferred introduce
OF_getencprop_alloc_multi helper function that copies semantics
of OF_getencprop_alloc prior to this change.

This is to make OF_getencprop_alloc and OF_getencprop_alloc_multi
function signatures consistent with OF_getencprop_alloc and
OF_getencprop_alloc_multi.

Functionality-wise this patch is mostly rename of OF_getencprop_alloc
to OF_getencprop_alloc_multi except two calls in ofw_bus_setup_iinfo
where 1 was used as a block size.

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Add SPDX tags to syscon bits, correct inconsistency in Copyright line.

extres/syscon: Commit missing bits from r327106

r327106 introduced kobj to syscon so it can be subclassed and fit in with
the rest of the syscon framework. The diff for syscon.c was misapplied in a

extres/syscon: Commit missing bits from r327106

r327106 introduced kobj to syscon so it can be subclassed and fit in with
the rest of the syscon framework. The diff for syscon.c was misapplied in a
clean tree prior to commit, so bring it back to what was included in the
review and tested. The entire file has basically been rewritten from what
was present prior to the kobj work.

Pointy hat to: me

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Move syscon into extres framework

This should help reduce confusion between syscon/syscons a little bit.
syscon is a resource generally modeled by FDT platforms, and not to be
confused with syscons.

syscon: Introduce kobj and split out fdt bits

Allow more flexibility by kobj'ifying syscon and splitting out fdt specific
bits in preparation of a move to the extres framework.

The generic fdt driv

syscon: Introduce kobj and split out fdt bits

Allow more flexibility by kobj'ifying syscon and splitting out fdt specific
bits in preparation of a move to the extres framework.

The generic fdt driver has been moved to syscon_generic.c and the fdt
requirement has been removed from the syscon interface, as is common to the
extres framework.

Reviewed by: strejda
Differential Revision: https://reviews.freebsd.org/D13521

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Correct a typo in syscon driver 'modify' logic

Not previously caught because the current consumer (not yet in tree) doesn't
use the 'modify' bits (yet).

Reported by: rpokala

Add generic 'syscon' driver

Upstream dts for allwinner will require a syscon driver, since the emac node
coming in 4.15 will be using xref to /soc/syscon for configuring the emac
clock. Add a generi

Add generic 'syscon' driver

Upstream dts for allwinner will require a syscon driver, since the emac node
coming in 4.15 will be using xref to /soc/syscon for configuring the emac
clock. Add a generic syscon driver to attach to /soc/syscon for use by
if_awg, providing basic read/write functionality to consumers.

syscon driver will also be used by arm64 at least for A64+H5 emac/if_awg.

Written by: mmel
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D13295

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