Merge changes from topic "bk/warnings" into integration

* changes:
docs: describe the new warning levels
build: add -Wunused-const-variable=2 to W=2
build: include -Wextra in generic builds

Merge changes from topic "bk/warnings" into integration

* changes:
docs: describe the new warning levels
build: add -Wunused-const-variable=2 to W=2
build: include -Wextra in generic builds
docs(porting-guide): update a reference
fix(st-usb): replace redundant checks with asserts
fix(brcm): add braces around bodies of conditionals
fix(renesas): align incompatible function pointers
fix(zynqmp): remove redundant api_version check
fix: remove old-style declarations
fix: unify fallthrough annotations

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fix: remove old-style declarations

TF-A wants to eventually enable -Wold-style-definition globally. Convert
the rare few instances where this is still the case.

Signed-off-by: Boyan Karatotev <boya

fix: remove old-style declarations

TF-A wants to eventually enable -Wold-style-definition globally. Convert
the rare few instances where this is still the case.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I9c450fc875cf097e6de2ed577ea3b085821c9f5e

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Merge pull request #1789 from Anson-Huang/lpm

Add power optimization for i.MX8QM/i.MX8QX

imx: power optimization for i.mx8qx

Current implementation of i.MX8QX power management related
features does NOT optimize power number, all system resources
like CCI, DDR, and A cluster etc. are kep

imx: power optimization for i.mx8qx

Current implementation of i.MX8QX power management related
features does NOT optimize power number, all system resources
like CCI, DDR, and A cluster etc. are kept in STBY mode (powered
ON) when system suspend or CPU hotplug.

To lower the power number, OFF mode should be adopted for those
system resources whenever they can be OFF, A cluster will be OFF
if the CPUs in the cluster are all off line, DDR/MU/DB can be OFF
if system suspend, IRQ steer can be OFF if the wakeup source is
belonged to system controller partition, so wakeup source runtime
check is used to determine if IRQ steer can be OFF before system
suspend.

If resources are powered off for suspend, they should be restored
properly after system resume.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

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Merge pull request #1726 from antonio-nino-diaz-arm/an/includes

Sanitise includes across codebase

Sanitise includes across codebase

Enforce full include path for includes. Deprecate old paths.

The following folders inside include/lib have been left unchanged:

- include/lib/cpus/${ARCH}
- inclu

Sanitise includes across codebase

Enforce full include path for includes. Deprecate old paths.

The following folders inside include/lib have been left unchanged:

- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}

The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).

For example, this patch had to be created because two headers were
called the same way: e0ea0928d5b7 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3a282 ("drivers: add tzc380 support").

This problem was introduced in commit 4ecca33988b9 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.

Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.

Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

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Merge pull request #1528 from antonio-nino-diaz-arm/an/libc

libc: Cleanup library

libc: Use printf and snprintf across codebase

tf_printf and tf_snprintf are now called printf and snprintf, so the
code needs to be updated.

Change-Id: Iffeee97afcd6328c4c2d30830d4923b964682d71
Sig

libc: Use printf and snprintf across codebase

tf_printf and tf_snprintf are now called printf and snprintf, so the
code needs to be updated.

Change-Id: Iffeee97afcd6328c4c2d30830d4923b964682d71
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

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Merge pull request #1471 from Anson-Huang/master

Add i.MX8QX/i.MX8QM power management feature

imx: imx8qx: add domain suspend/resume support

Add domain suspend/resume support, Linux kernel
can "echo mem > /sys/power/state" to put system
into suspend mode, all CPUs and cluster will be
powered

imx: imx8qx: add domain suspend/resume support

Add domain suspend/resume support, Linux kernel
can "echo mem > /sys/power/state" to put system
into suspend mode, all CPUs and cluster will be
powered off and can be waked up if irq pending
in GIC, tested on i.MX8QX MEK board.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

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imx: imx8qx: add domain off support

Add domain off support for Linux kernel's cpu
hot-plug feature, when there are cpu off request
from Linux kernel, TF-A will send command to
system controller to d

imx: imx8qx: add domain off support

Add domain off support for Linux kernel's cpu
hot-plug feature, when there are cpu off request
from Linux kernel, TF-A will send command to
system controller to do CPU power gate accordingly.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

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imx: imx8qx: add system reset support

Add system reset support for i.MX8QX,
when Linux kernel issues "reboot" command,
TF-A will send command to inform system
controller to reset whole board accordi

imx: imx8qx: add system reset support

Add system reset support for i.MX8QX,
when Linux kernel issues "reboot" command,
TF-A will send command to inform system
controller to reset whole board according
to board design, tested on i.MX8QX MEK board.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

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imx: imx8qx: add system off support

Add system power off support for i.MX8QX,
when Linux kernel issues "poweroff" command,
TF-A will send command to inform system
controller to power off whole board

imx: imx8qx: add system off support

Add system power off support for i.MX8QX,
when Linux kernel issues "poweroff" command,
TF-A will send command to inform system
controller to power off whole board according
to board design, tested on i.MX8QX MEK board.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

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Merge pull request #1410 from Anson-Huang/master

Add NXP's i.MX8QX and i.MX8QM SoC support

Support for NXP's i.MX8QX SoC

NXP's i.MX8QX is an ARMv8 SoC with 4 Cortex-A35 cores and
system controller (Cortex-M4) inside, documentation can
be found in below link:

https://www.nxp.com/products/

Support for NXP's i.MX8QX SoC

NXP's i.MX8QX is an ARMv8 SoC with 4 Cortex-A35 cores and
system controller (Cortex-M4) inside, documentation can
be found in below link:

https://www.nxp.com/products/processors-and-microcontrollers/
applications-processors/i.mx-applications-processors/i.mx-8-processors:IMX8-SERIES

This patch adds support for booting up SMP linux kernel (v4.9).

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

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