bus_generic_detach: Delete children after detaching them

This provides better semantics as a standalone DEVMETHOD for
device_attach as bus drivers should remove child devices they created
as part of

bus_generic_detach: Delete children after detaching them

This provides better semantics as a standalone DEVMETHOD for
device_attach as bus drivers should remove child devices they created
as part of detach cleanup. The implementation calls
bus_detach_children() first to permit child devices an opportunity to
veto the detach operation. If that succeeds, device_delete_children()
is used to delete the child devices.

This requires fixing various drivers that were deleting devices
explicitly (via a device_t pointer cached in the softc) after calling
bus_generic_detach to stop doing that and just rely on
bus_generic_detach to remove child devices.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D47959

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bus_delayed_attach_children: Switch return type to void

This function never fails similar to bus_attach_children.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D47677

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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arm ti: Remove unused devclass arguments to DRIVER_MODULE.

Remove unused iicbus_devclass.

arm: clean up empty lines in .c and .h files

MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

Merge ^/head r363583 through r363738.

Move Ti AM335x to dev/extres/clk framework.

Re-implement clocks for these SoC by using now standard extres/clk framework.
This is necessary for future expansion of these. The new implementation
is

Move Ti AM335x to dev/extres/clk framework.

Re-implement clocks for these SoC by using now standard extres/clk framework.
This is necessary for future expansion of these. The new implementation
is (due to the size of the patch) only the initial (minimum) version.
It will be updated/expanded with a subsequent set of particular patches.

This patch is also not tested on OMAP4 based boards (BeagleBone),
so all possible issues should be (and will be) fixed by ASAP once
identified.

Submited by: Oskar Holmlund (oskar.holmlund@ohdata.se)
Differential Revision: https://reviews.freebsd.org/D25118

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Create new wrapper function: bus_delayed_attach_children()

Delay the attachment of children, when requested, until after interrutps are
running. This is often needed to allow children to run transac

Create new wrapper function: bus_delayed_attach_children()

Delay the attachment of children, when requested, until after interrutps are
running. This is often needed to allow children to run transactions on i2c or
spi busses. It's a common enough idiom that it will be useful to have its own
wrapper.

Reviewed by: ian
Differential Revision: https://reviews.freebsd.org/D21465

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MFHead @349234

Sponsored by: The FreeBSD Foundation

In detach(), call bus_generic_detach() before deleting the iicbus child.
This gives the bus and its children the chance to return EBUSY to abort
the detach if they're in the middle of doing some IO.

sys/arm: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

sys/arm: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

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MFhead@r323635

MFH @ r323558.

Defer attaching and probing iicbus and its children until interrupts are
available, in i2c controller drivers that require interrupts for transfers.

This is the result of auditing all 22 existing dr

Defer attaching and probing iicbus and its children until interrupts are
available, in i2c controller drivers that require interrupts for transfers.

This is the result of auditing all 22 existing drivers that attach iicbus.
These drivers were the only ones remaining that require interrupts and were
not using config_intrhook to defer attachment. That has led, over the
years, to various i2c slave device drivers needing to use config_intrhook
themselves rather than performing bus transactions in their probe() and
attach() methods, just in case they were attached too early.

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sys/arm: Minor spelling fixes.

Only affects comments: no functional change.

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Catch up with head (r291075).

Consistently capitalize "TI" as an abbreviation for Texas Instruments.

Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

Merge sync of head