Add ietp driver for Elantech I2C touchpads

From Vladimir Serbinenko

Add icc(4) to handle Customer Control keyboards attached to i2c bus.
ok anton@ patrick@

Initial apm/sensor driver for the PiJuice HAT UPS, to feedback battery
status information.

ok deraadt@

Add pcyrtc(4), a driver for the NXP PCF85063A/TP RTC chips.

ok patrick@

Add titmp(4), a driver for the TI TMP451 temperature sensor.

ok deraadt@

Move mfokclock(4) from loongson to sys/dev/i2c so that it be used by more
platforms than just loongson. Rename it to mfokrtc(4) for consistency with
other RTC drivers. Make it match on st,m41t83, s

Move mfokclock(4) from loongson to sys/dev/i2c so that it be used by more
platforms than just loongson. Rename it to mfokrtc(4) for consistency with
other RTC drivers. Make it match on st,m41t83, since that was the chip for
which the driver was written for. More compatible strings can be added for
each chip of the series verified to behave the same.

Discussed with kettenis@
Compile tested on loongson by kn@
Tested on loongson by and ok visa@

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Add pcamux(4), a driver for the PCA8548 I2C switch.

ok patrick@

Add dsxrtc(4), a driver for the Maxim DS3231/DS3232 I2C RTC.

ok deraadt@

mcprtc(4), a driver for the Microchip MCP79400 RTC and similar variants.

ok kettenis@

Add support for SMBus System Interface (SSIF).

ok jmatthew@

abcrtc(4), a driver for the Abracon AB1805 RTC and similar variants.

ok kettenis@

Strip down the (not enabled) pcagpio(4) GPIO extender. This removes
the sensors code and user-controllable GPIO bus attachment but at the
same time hooks pcagpio(4) into the OFW GPIO framework so th

Strip down the (not enabled) pcagpio(4) GPIO extender. This removes
the sensors code and user-controllable GPIO bus attachment but at the
same time hooks pcagpio(4) into the OFW GPIO framework so that it can
be used by other device tree based drivers.

Discussed with deraadt@
ok kettenis@

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Add islrtc(4), a driver for the Intersil ISL1208 Real Time Clock.

Add bgw(4), a driver for a family of Bosch acceleration sensors.

ok deraadt@, mlarkin@

pcxrtc(4), a driver for the NXP PCF8563 RTC.

ok deraadt@

add iatp(4), a driver for the i2c touchpad and touchscreen found on
the chromebook pixel

I2C driver for the Maxim DS1307 Real Time Clock chip.

The chip has been found on a Sun Fire V210 as a second RTC hooked up
to the SMU. Setting the time there has the advantage that it remains
after

I2C driver for the Maxim DS1307 Real Time Clock chip.

The chip has been found on a Sun Fire V210 as a second RTC hooked up
to the SMU. Setting the time there has the advantage that it remains
after a boot since the internal V210 RTC will be synced by the DS1307
at boot time.

Not linked to sparc64 yet since it will overwrite the internal RTC
handler.

ok deraadt

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Add pcfrtc(4).

add hidmt, a HID-layer driver for multitouch touchpads that conform
to the "Windows Precision Touchpad" standard. when a compatible
device is found, hidmt claims all report ids and switches the devi

add hidmt, a HID-layer driver for multitouch touchpads that conform
to the "Windows Precision Touchpad" standard. when a compatible
device is found, hidmt claims all report ids and switches the device
into multitouch packet mode.

add imt, an i2c-HID driver that sits between ihidev and hidmt

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Driver for HID-over-i2c keyboards.

Add dwiic, a driver for the Synopsys DesignWare i2c controller found
on the Samsung ATIV Book 9 laptop. This initial version only
supports ACPI config/attachment.

Add ihidev, a HID-over-i2c driver

Add dwiic, a driver for the Synopsys DesignWare i2c controller found
on the Samsung ATIV Book 9 laptop. This initial version only
supports ACPI config/attachment.

Add ihidev, a HID-over-i2c driver largely based on uhidev. dwiic
handles attaching ihidev devices found in ACPI.

Add ims, a HID-over-i2c mouse/trackpad driver to get basic cursor
and button functionality from HID-compliant i2c trackpads.

ok kettenis deraadt

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Unbreak the build on amd64 by making sure that inteldrm pulls in the generic
i2c bit-banging code. Requires us to move around the i2c_bitbang define.
Also move the onewire_bitbang define to be close

Unbreak the build on amd64 by making sure that inteldrm pulls in the generic
i2c bit-banging code. Requires us to move around the i2c_bitbang define.
Also move the onewire_bitbang define to be close to i2c_bitbang since they
are similar.

ok jsing@

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Enter nvt(4), a driver for the W83795G and W83795ADG hardware monitor.

ok deraadt@, miod@

Split existing spdmem@i2c code into bus-agnostic spd record decoding code,
and an i2c attachment.
No functional change; ok jsg@ deraadt@

only pull in the source file if it is needed, so that all the others
we use compile
brilliant cnst, please learn to test better