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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

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

arm ti: Remove unused devclass arguments to DRIVER_MODULE.

Retire devctl_notify_f()

devctl_notify_f isn't needed, so retire it. The flags argument is now
unused, so rather than keep it around, retire it. Convert all old
users of it to devctl_notify(). This path no longer sleeps, so is safe
to call from any context. Since it doesn't sleep, it doesn't need to
know if it is OK to sleep or not.

Reviewed by: markj@
Differential Revision: https://reviews.freebsd.org/D26140

arm: am335x: Honor pmic option ti,pmic-shutdown-controller

Honor ti,pmic-shutdown-controller option in DTS

Tested on stable r359316 @ Sleep mode on custom hw, Power off on BBB and PB

OFF bit [1] in status register control the pmic behaviour when PWR_EN pin
is pulled low.
On most AM335x hardware [beaglebone *] the desired behaviour are in fact
power off due to some hardware designs - read more in the comments around
pmic in sys/gnu/dts/arm/am335x-bone-common.dtsi

This patch let the device-tree decide with ti,pmic-shutdown-controller[2]
the state of off bit in status register.

[1] 8.6.12 table 12 http://www.ti.com/lit/ds/symlink/tps65217.pdf

[2] Documentation/devicetree/bindings/regulator/tps65217.txt

PR: 245159
Submitted by: Oskar Holmlund <oskar.holmlund@ohdata.se>
MFC after: 2 weeks

Revert r350841. I didn't realize that on this chip, reading the interrupt
status register clears pending interrupts. By moving that code out of the
interrupt handler into a taskqueue task, I effectively created an interrupt
storm by returning from the handler with the interrupt source still active.

We'll have to find a different solution for this driver's need to sleep
in an ithread context.

Remove use of intr_config_hook from the am335x_pmic and tda19988 drivers.
Long ago this was needed, but now low-level i2c controller drivers cleverly
defer attachment of the bus until interrupts are enabled (if they require
interrupts to function), so that every i2c slave device doesn't have to.

When responding to an interrupt in the am335x_pmic driver, use a taskqueue
thread to do the work that involves i2c IO, which sleeps while the IO is
in progress.

Garbage collect the no-longer-necessary MAX_IIC_DATA_SIZE (there is not a
buffer allocated at that fixed size anymore).

Switch the am335x_pmic driver to using iicdev_readfrom/writeto.

PR: 239697
Submitted by: Chuhong Yuan

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.

Fix parsing of I2C addresses properties in fdt data. I2C address is
represented in 7-bits format in DT files, but system expect it in 8-bit
format. Also, fix two drivers that locally hack around this bug.

Submitted by: Michal Meloun <meloun@miracle.cz>

"status_reg.acpwr ? 1 : 0" is now the same as just "status_reg.acpwr".

Use tab to do identation consistently.

Extend TPS65217 support to be able to pull and decode battery
charger configuration and provide some basic control knobs to
set charger voltage and dump config on boot. Two loader tunables
have been added:

o hw.am335x_pmic.bootverbose set to 1 to get more info on the
boot;

o hw.am335x_pmic.vo: set to charger voltage to be applied on
kernel initialization time, supported values are "4.10V",
"4.15V", "4.20V" and "4.25V".

Cleanup code a bit in general, move TPS65217 register
definitions into a separate header, convert bit-banging
defines into bitmap structures.

Also threat the case when power source is neither "AC" nor "USB"
as "Battery", not "Unknown".

Switch TI platform support code from using FreeBSD's custom-baked DTS
files to vendor-provided ones. It should make easier to adopt platform
code to new revisions of hardware and to use DTS overlays for various
Beaglebone extensions (shields/capes).

Original dts filenames were not changed, they're now wrappers over dts
files provided by TI. So make sure you update .dtb files on your
devices as part of kernel update

GPIO addressing was changed: instead of one global /dev/gpioc0 there
are per-bank instances of /dev/gpiocX. Each bank has 32 pins so for
instance pin 121 on /dev/gpioc0 in old addressing scheme is now pin 25
on /dev/gpioc3

On Pandaboard serial console devices was changed from /dev/ttyu0 to
/dev/ttyu2 so you'll have to update /etc/ttys to get login prompt
on serial port in multiuser mode. Single user mode serial console
should work as-is

Differential Revision: https://reviews.freebsd.org/D2146
Reviewed by: rpaulo, ian, Michal Meloun, Svatopluk Kraus

Add support for the power button on BeagleBone Black.

Shutdown and turn off the board when the power button is pressed.

Submitted by: Michal Meloun <meloun@miracle.cz>
Relnotes: yes

Add support to turn off Beaglebone with poweroff(8) or shutdown(8) -p.

To cut off the power we need to start the shutdown sequence by writing
the OFF bit on PMIC.

Once the PMIC is programmed the SoC needs to toggle the PMIC_PWR_ENABLE
pin when it is ready for the PMIC to cut off the power. This is done by
triggering the ALARM2 interrupt on SoC RTC.

The RTC driver only works in power management mode which means it won't
provide any kind of time keeping functionality. It only implements a way
to trigger the ALARM2 interrupt when requested.

Differential Revision: https://reviews.freebsd.org/D1489
Reviewed by: rpaulo
MFC after: 2 weeks

Add IDs for TPS65217C and TPS65217D

Merging of projects/armv6, part 10

- Support for Texas Instruments SoCs:
- AM335x
- OMAP4

- Kernel configs, DTS for Beaglebone and Pandaboard

Submitted by: Ben Gray, Damjan Marion